lisp/ob.el

   1 ;;; ob.el --- working with code blocks in org-mode
   2
   3 ;; Copyright (C) 2009-2011  Free Software Foundation, Inc.
   4
   5 ;; Author: Eric Schulte
   6 ;;      Dan Davison
   7 ;; Keywords: literate programming, reproducible research
   8 ;; Homepage: http://orgmode.org
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Code:
  26 (eval-when-compile
  27   (require 'cl))
  28 (require 'ob-eval)
  29 (require 'org-macs)
  30
  31 (defvar org-babel-call-process-region-original)
  32 (defvar org-src-lang-modes)
  33 (defvar org-babel-library-of-babel)
  34 (declare-function show-all "outline" ())
  35 (declare-function tramp-compat-make-temp-file "tramp-compat"
  36                   (filename &optional dir-flag))
  37 (declare-function tramp-dissect-file-name "tramp" (name &optional nodefault))
  38 (declare-function tramp-file-name-user "tramp" (vec))
  39 (declare-function tramp-file-name-host "tramp" (vec))
  40 (declare-function with-parsed-tramp-file-name "tramp" (filename var &rest body))
  41 (declare-function org-icompleting-read "org" (&rest args))
  42 (declare-function org-edit-src-code "org-src"
  43                   (&optional context code edit-buffer-name quietp))
  44 (declare-function org-edit-src-exit "org-src"  (&optional context))
  45 (declare-function org-open-at-point "org" (&optional in-emacs reference-buffer))
  46 (declare-function org-save-outline-visibility "org" (use-markers &rest body))
  47 (declare-function org-outline-overlay-data "org" (&optional use-markers))
  48 (declare-function org-set-outline-overlay-data "org" (data))
  49 (declare-function org-narrow-to-subtree "org" ())
  50 (declare-function org-entry-get "org"
  51                   (pom property &optional inherit literal-nil))
  52 (declare-function org-make-options-regexp "org" (kwds &optional extra))
  53 (declare-function org-do-remove-indentation "org" (&optional n))
  54 (declare-function org-show-context "org" (&optional key))
  55 (declare-function org-at-table-p "org" (&optional table-type))
  56 (declare-function org-cycle "org" (&optional arg))
  57 (declare-function org-uniquify "org" (list))
  58 (declare-function org-current-level "org" ())
  59 (declare-function org-table-import "org-table" (file arg))
  60 (declare-function org-add-hook "org-compat"
  61                   (hook function &optional append local))
  62 (declare-function org-table-align "org-table" ())
  63 (declare-function org-table-end "org-table" (&optional table-type))
  64 (declare-function orgtbl-to-generic "org-table" (table params))
  65 (declare-function orgtbl-to-orgtbl "org-table" (table params))
  66 (declare-function org-babel-tangle-comment-links "ob-tangle" (&optional info))
  67 (declare-function org-babel-lob-get-info "ob-lob" nil)
  68 (declare-function org-babel-ref-split-args "ob-ref" (arg-string))
  69 (declare-function org-babel-ref-parse "ob-ref" (assignment))
  70 (declare-function org-babel-ref-resolve "ob-ref" (ref))
  71 (declare-function org-babel-ref-goto-headline-id "ob-ref" (id))
  72 (declare-function org-babel-ref-headline-body "ob-ref" ())
  73 (declare-function org-babel-lob-execute-maybe "ob-lob" ())
  74 (declare-function org-number-sequence "org-compat" (from &optional to inc))
  75 (declare-function org-at-item-p "org-list" ())
  76 (declare-function org-list-parse-list "org-list" (&optional delete))
  77 (declare-function org-list-to-generic "org-list" (LIST PARAMS))
  78 (declare-function org-list-struct "org-list" ())
  79 (declare-function org-list-prevs-alist "org-list" (struct))
  80 (declare-function org-list-get-list-end "org-list" (item struct prevs))
  81
  82 (defgroup org-babel nil
  83   "Code block evaluation and management in `org-mode' documents."
  84   :tag "Babel"
  85   :group 'org)
  86
  87 (defcustom org-confirm-babel-evaluate t
  88   "Confirm before evaluation.
  89 Require confirmation before interactively evaluating code
  90 blocks in Org-mode buffers.  The default value of this variable
  91 is t, meaning confirmation is required for any code block
  92 evaluation.  This variable can be set to nil to inhibit any
  93 future confirmation requests.  This variable can also be set to a
  94 function which takes two arguments the language of the code block
  95 and the body of the code block.  Such a function should then
  96 return a non-nil value if the user should be prompted for
  97 execution or nil if no prompt is required.
  98
  99 Warning: Disabling confirmation may result in accidental
 100 evaluation of potentially harmful code.  It may be advisable
 101 remove code block execution from C-c C-c as further protection
 102 against accidental code block evaluation.  The
 103 `org-babel-no-eval-on-ctrl-c-ctrl-c' variable can be used to
 104 remove code block execution from the C-c C-c keybinding."
 105     :group 'org-babel
 106     :type '(choice boolean function))
 107 ;; don't allow this variable to be changed through file settings
 108 (put 'org-confirm-babel-evaluate 'safe-local-variable (lambda (x) (eq x t)))
 109
 110 (defcustom org-babel-no-eval-on-ctrl-c-ctrl-c nil
 111   "Remove code block evaluation from the C-c C-c key binding."
 112   :group 'org-babel
 113   :type 'boolean)
 114
 115 (defvar org-babel-src-name-regexp
 116   "^[ \t]*#\\+\\(srcname\\|source\\|function\\):[ \t]*"
 117   "Regular expression used to match a source name line.")
 118
 119 (defvar org-babel-multi-line-header-regexp
 120   "^[ \t]*#\\+headers?:[ \t]*\\([^\n]*\\)$"
 121   "Regular expression used to match multi-line header arguments.")
 122
 123 (defvar org-babel-src-name-w-name-regexp
 124   (concat org-babel-src-name-regexp
 125           "\\("
 126           org-babel-multi-line-header-regexp
 127           "\\)*"
 128           "\\([^ ()\f\t\n\r\v]+\\)\\(\(\\(.*\\)\)\\|\\)")
 129   "Regular expression matching source name lines with a name.")
 130
 131 (defvar org-babel-src-block-regexp
 132   (concat
 133    ;; (1) indentation                 (2) lang
 134    "^\\([ \t]*\\)#\\+begin_src[ \t]+\\([^ \f\t\n\r\v]+\\)[ \t]*"
 135    ;; (3) switches
 136    "\\([^\":\n]*\"[^\"\n*]*\"[^\":\n]*\\|[^\":\n]*\\)"
 137    ;; (4) header arguments
 138    "\\([^\n]*\\)\n"
 139    ;; (5) body
 140    "\\([^\000]*?\n\\)?[ \t]*#\\+end_src")
 141   "Regexp used to identify code blocks.")
 142
 143 (defvar org-babel-inline-src-block-regexp
 144   (concat
 145    ;; (1) replacement target (2) lang
 146    "\\(?:^\\|[^-[:alnum:]]\\)\\(src_\\([^ \f\t\n\r\v]+\\)"
 147    ;; (3,4) (unused, headers)
 148    "\\(\\|\\[\\(.*?\\)\\]\\)"
 149    ;; (5) body
 150    "{\\([^\f\n\r\v]+?\\)}\\)")
 151   "Regexp used to identify inline src-blocks.")
 152
 153 (defun org-babel-get-header (params key &optional others)
 154   "Select only header argument of type KEY from a list.
 155 Optional argument OTHERS indicates that only the header that do
 156 not match KEY should be returned."
 157   (delq nil
 158         (mapcar
 159          (lambda (p) (when (funcall (if others #'not #'identity) (eq (car p) key)) p))
 160          params)))
 161
 162 (defun org-babel-get-inline-src-block-matches()
 163   "Set match data if within body of an inline source block.
 164 Returns non-nil if match-data set"
 165   (let ((src-at-0-p (save-excursion
 166                       (beginning-of-line 1)
 167                       (string= "src" (thing-at-point 'word))))
 168         (first-line-p (= 1 (line-number-at-pos)))
 169         (orig (point)))
 170     (let ((search-for (cond ((and src-at-0-p first-line-p  "src_"))
 171                             (first-line-p "[ \t]src_")
 172                             (t "[ \f\t\n\r\v]src_")))
 173           (lower-limit (if first-line-p
 174                            nil
 175                          (- (point-at-bol) 1))))
 176       (save-excursion
 177         (when (or (and src-at-0-p (bobp))
 178                   (and (re-search-forward "}" (point-at-eol) t)
 179                        (re-search-backward search-for lower-limit t)
 180                        (> orig (point))))
 181           (when (looking-at org-babel-inline-src-block-regexp)
 182             t ))))))
 183
 184 (defun org-babel-get-lob-one-liner-matches()
 185   "Set match data if on line of an lob one liner.
 186 Returns non-nil if match-data set"
 187
 188   (save-excursion
 189     (unless (= (point) (point-at-bol)) ;; move before inline block
 190       (re-search-backward "[ \f\t\n\r\v]" nil t))
 191     (if (looking-at org-babel-inline-lob-one-liner-regexp)
 192         t
 193       nil)))
 194
 195 (defun org-babel-get-src-block-info (&optional light)
 196   "Get information on the current source block.
 197
 198 Optional argument LIGHT does not resolve remote variable
 199 references; a process which could likely result in the execution
 200 of other code blocks.
 201
 202 Returns a list
 203  (language body header-arguments-alist switches name indent)."
 204   (let ((case-fold-search t) head info name indent)
 205     ;; full code block
 206     (if (setq head (org-babel-where-is-src-block-head))
 207         (save-excursion
 208           (goto-char head)
 209           (setq info (org-babel-parse-src-block-match))
 210           (setq indent (car (last info)))
 211           (setq info (butlast info))
 212           (while (and (forward-line -1)
 213                       (looking-at org-babel-multi-line-header-regexp))
 214             (setf (nth 2 info)
 215                   (org-babel-merge-params
 216                    (nth 2 info)
 217                    (org-babel-parse-header-arguments (match-string 1)))))
 218           (when (looking-at org-babel-src-name-w-name-regexp)
 219             (setq name (org-babel-clean-text-properties (match-string 4)))
 220             (when (match-string 6)
 221               (setf (nth 2 info) ;; merge functional-syntax vars and header-args
 222                     (org-babel-merge-params
 223                      (mapcar
 224                       (lambda (ref) (cons :var ref))
 225                       (mapcar
 226                        (lambda (var) ;; check that each variable is initialized
 227                          (unless (string-match ".+=.+" var)
 228                            (error
 229                             "variable \"%s\"%s must be assigned a default value"
 230                             var (if name (format " in block \"%s\"" name) ""))))
 231                        (org-babel-ref-split-args (match-string 6))))
 232                      (nth 2 info))))))
 233       ;; inline source block
 234       (when (org-babel-get-inline-src-block-matches)
 235         (setq info (org-babel-parse-inline-src-block-match))))
 236     ;; resolve variable references and add summary parameters
 237     (when (and info (not light))
 238       (setf (nth 2 info) (org-babel-process-params (nth 2 info))))
 239     (when info (append info (list name indent)))))
 240
 241 (defun org-babel-confirm-evaluate (info)
 242   "Confirm evaluation of the code block INFO.
 243 This behavior can be suppressed by setting the value of
 244 `org-confirm-babel-evaluate' to nil, in which case all future
 245 interactive code block evaluations will proceed without any
 246 confirmation from the user.
 247
 248 Note disabling confirmation may result in accidental evaluation
 249 of potentially harmful code."
 250   (let* ((eval (or (cdr (assoc :eval (nth 2 info)))
 251                    (when (assoc :noeval (nth 2 info)) "no")))
 252          (query (cond ((equal eval "query") t)
 253                       ((functionp org-confirm-babel-evaluate)
 254                        (funcall org-confirm-babel-evaluate
 255                                 (nth 0 info) (nth 1 info)))
 256                       (t org-confirm-babel-evaluate))))
 257     (if (or (equal eval "never") (equal eval "no")
 258             (and query
 259                  (not (yes-or-no-p
 260                        (format "Evaluate this%scode block%son your system? "
 261                                (if info (format " %s " (nth 0 info)) " ")
 262                                (if (nth 4 info)
 263                                    (format " (%s) " (nth 4 info)) " "))))))
 264         (prog1 nil (message "Evaluation %s"
 265                             (if (or (equal eval "never") (equal eval "no"))
 266                                 "Disabled" "Aborted")))
 267       t)))
 268
 269 ;;;###autoload
 270 (defun org-babel-execute-safely-maybe ()
 271   (unless org-babel-no-eval-on-ctrl-c-ctrl-c
 272     (org-babel-execute-maybe)))
 273
 274 (add-hook 'org-ctrl-c-ctrl-c-hook 'org-babel-execute-safely-maybe)
 275
 276 ;;;###autoload
 277 (defun org-babel-execute-maybe ()
 278   (interactive)
 279   (or (org-babel-execute-src-block-maybe)
 280       (org-babel-lob-execute-maybe)))
 281
 282 (defun org-babel-execute-src-block-maybe ()
 283   "Conditionally execute a source block.
 284 Detect if this is context for a Babel src-block and if so
 285 then run `org-babel-execute-src-block'."
 286   (interactive)
 287   (let ((info (org-babel-get-src-block-info)))
 288     (if info
 289         (progn (org-babel-eval-wipe-error-buffer)
 290                (org-babel-execute-src-block current-prefix-arg info) t) nil)))
 291
 292 ;;;###autoload
 293 (defun org-babel-view-src-block-info ()
 294   "Display information on the current source block.
 295 This includes header arguments, language and name, and is largely
 296 a window into the `org-babel-get-src-block-info' function."
 297   (interactive)
 298   (let ((info (org-babel-get-src-block-info 'light)))
 299     (flet ((full (it) (> (length it) 0))
 300            (printf (fmt &rest args) (princ (apply #'format fmt args))))
 301       (when info
 302         (with-help-window (help-buffer)
 303           (let ((name        (nth 4 info))
 304                 (lang        (nth 0 info))
 305                 (switches    (nth 3 info))
 306                 (header-args (nth 2 info)))
 307             (when name            (printf "Name: %s\n"     name))
 308             (when lang            (printf "Lang: %s\n"     lang))
 309             (when (full switches) (printf "Switches: %s\n" switches))
 310             (printf "Header Arguments:\n")
 311             (dolist (pair (sort header-args
 312                                 (lambda (a b) (string< (symbol-name (car a))
 313                                                   (symbol-name (car b))))))
 314               (when (full (cdr pair))
 315                 (printf "\t%S%s\t%s\n"
 316                         (car pair)
 317                         (if (> (length (format "%S" (car pair))) 7) "" "\t")
 318                         (cdr pair))))))))))
 319
 320 ;;;###autoload
 321 (defun org-babel-expand-src-block-maybe ()
 322   "Conditionally expand a source block.
 323 Detect if this is context for a org-babel src-block and if so
 324 then run `org-babel-expand-src-block'."
 325   (interactive)
 326   (let ((info (org-babel-get-src-block-info)))
 327     (if info
 328         (progn (org-babel-expand-src-block current-prefix-arg info) t)
 329       nil)))
 330
 331 ;;;###autoload
 332 (defun org-babel-load-in-session-maybe ()
 333   "Conditionally load a source block in a session.
 334 Detect if this is context for a org-babel src-block and if so
 335 then run `org-babel-load-in-session'."
 336   (interactive)
 337   (let ((info (org-babel-get-src-block-info)))
 338     (if info
 339         (progn (org-babel-load-in-session current-prefix-arg info) t)
 340       nil)))
 341
 342 (add-hook 'org-metaup-hook 'org-babel-load-in-session-maybe)
 343
 344 ;;;###autoload
 345 (defun org-babel-pop-to-session-maybe ()
 346   "Conditionally pop to a session.
 347 Detect if this is context for a org-babel src-block and if so
 348 then run `org-babel-pop-to-session'."
 349   (interactive)
 350   (let ((info (org-babel-get-src-block-info)))
 351     (if info (progn (org-babel-pop-to-session current-prefix-arg info) t) nil)))
 352
 353 (add-hook 'org-metadown-hook 'org-babel-pop-to-session-maybe)
 354
 355 (defconst org-babel-header-arg-names
 356   '(cache cmdline colnames dir exports file noweb results
 357     session tangle var eval noeval comments no-expand shebang
 358     padline noweb-ref)
 359   "Common header arguments used by org-babel.
 360 Note that individual languages may define their own language
 361 specific header arguments as well.")
 362
 363 (defvar org-babel-default-header-args
 364   '((:session . "none") (:results . "replace") (:exports . "code")
 365     (:cache . "no") (:noweb . "no") (:hlines . "no") (:tangle . "no")
 366     (:padnewline . "yes"))
 367   "Default arguments to use when evaluating a source block.")
 368
 369 (defvar org-babel-default-inline-header-args
 370   '((:session . "none") (:results . "replace") (:exports . "results"))
 371   "Default arguments to use when evaluating an inline source block.")
 372
 373 (defvar org-babel-data-names '("TBLNAME" "RESNAME" "RESULTS" "DATA"))
 374
 375 (defvar org-babel-result-regexp
 376   (concat "^[ \t]*#\\+"
 377           (regexp-opt org-babel-data-names t)
 378           "\\(\\[\\([[:alnum:]]+\\)\\]\\)?\\:[ \t]*")
 379   "Regular expression used to match result lines.
 380 If the results are associated with a hash key then the hash will
 381 be saved in the second match data.")
 382
 383 (defvar org-babel-result-w-name-regexp
 384   (concat org-babel-result-regexp
 385           "\\([^ ()\f\t\n\r\v]+\\)\\(\(\\(.*\\)\)\\|\\)"))
 386
 387 (defvar org-babel-min-lines-for-block-output 10
 388   "The minimum number of lines for block output.
 389 If number of lines of output is equal to or exceeds this
 390 value, the output is placed in a #+begin_example...#+end_example
 391 block. Otherwise the output is marked as literal by inserting
 392 colons at the starts of the lines. This variable only takes
 393 effect if the :results output option is in effect.")
 394
 395 (defvar org-babel-noweb-error-langs nil
 396   "Languages for which Babel will raise literate programming errors.
 397 List of languages for which errors should be raised when the
 398 source code block satisfying a noweb reference in this language
 399 can not be resolved.")
 400
 401 (defvar org-babel-hash-show 4
 402   "Number of initial characters to show of a hidden results hash.")
 403
 404 (defvar org-babel-after-execute-hook nil
 405   "Hook for functions to be called after `org-babel-execute-src-block'")
 406 (defun org-babel-named-src-block-regexp-for-name (name)
 407   "This generates a regexp used to match a src block named NAME."
 408   (concat org-babel-src-name-regexp (regexp-quote name) "[ \t\n]*"
 409           (substring org-babel-src-block-regexp 1)))
 410
 411 ;;; functions
 412 (defvar call-process-region)
 413 ;;;###autoload
 414
 415 (defun org-babel-execute-src-block (&optional arg info params)
 416   "Execute the current source code block.
 417 Insert the results of execution into the buffer.  Source code
 418 execution and the collection and formatting of results can be
 419 controlled through a variety of header arguments.
 420
 421 With prefix argument ARG, force re-execution even if a an
 422 existing result cached in the buffer would otherwise have been
 423 returned.
 424
 425 Optionally supply a value for INFO in the form returned by
 426 `org-babel-get-src-block-info'.
 427
 428 Optionally supply a value for PARAMS which will be merged with
 429 the header arguments specified at the front of the source code
 430 block."
 431   (interactive)
 432   (let ((info (or info (org-babel-get-src-block-info))))
 433     (when (org-babel-confirm-evaluate info)
 434       (let* ((lang (nth 0 info))
 435              (params (if params
 436                          (org-babel-process-params
 437                           (org-babel-merge-params (nth 2 info) params))
 438                        (nth 2 info)))
 439              (cache? (and (not arg) (cdr (assoc :cache params))
 440                           (string= "yes" (cdr (assoc :cache params)))))
 441              (result-params (cdr (assoc :result-params params)))
 442              (new-hash (when cache? (org-babel-sha1-hash info)))
 443              (old-hash (when cache? (org-babel-current-result-hash)))
 444              (body (setf (nth 1 info)
 445                          (let ((noweb (cdr (assoc :noweb params))))
 446                            (if (and noweb
 447                                     (or (string= "yes" noweb)
 448                                         (string= "tangle" noweb)))
 449                                (org-babel-expand-noweb-references info)
 450                              (nth 1 info)))))
 451              (dir (cdr (assoc :dir params)))
 452              (default-directory
 453                (or (and dir (file-name-as-directory dir)) default-directory))
 454              (org-babel-call-process-region-original
 455               (if (boundp 'org-babel-call-process-region-original)
 456                   org-babel-call-process-region-original
 457                 (symbol-function 'call-process-region)))
 458              (indent (car (last info)))
 459              result cmd)
 460         (unwind-protect
 461             (flet ((call-process-region (&rest args)
 462                     (apply 'org-babel-tramp-handle-call-process-region args)))
 463               (flet ((lang-check (f)
 464                        (let ((f (intern (concat "org-babel-execute:" f))))
 465                          (when (fboundp f) f))))
 466                 (setq cmd
 467                       (or (lang-check lang)
 468                           (lang-check (symbol-name
 469                                        (cdr (assoc lang org-src-lang-modes))))
 470                           (error "No org-babel-execute function for %s!" lang))))
 471               (if (and (not arg) new-hash (equal new-hash old-hash))
 472                   (save-excursion ;; return cached result
 473                     (goto-char (org-babel-where-is-src-block-result nil info))
 474                     (end-of-line 1) (forward-char 1)
 475                     (setq result (org-babel-read-result))
 476                     (message (replace-regexp-in-string
 477                               "%" "%%" (format "%S" result))) result)
 478                 (message "executing %s code block%s..."
 479                          (capitalize lang)
 480                          (if (nth 4 info) (format " (%s)" (nth 4 info)) ""))
 481                 (setq result
 482                       ((lambda (result)
 483                          (if (and (eq (cdr (assoc :result-type params)) 'value)
 484                                   (or (member "vector" result-params)
 485                                       (member "table" result-params))
 486                                   (not (listp result)))
 487                              (list (list result)) result))
 488                        (funcall cmd body params)))
 489                 ;; if non-empty result and :file then write to :file
 490                 (when (cdr (assoc :file params))
 491                   (when result
 492                     (with-temp-file (cdr (assoc :file params))
 493                       (insert
 494                        (org-babel-format-result
 495                         result (cdr (assoc :sep (nth 2 info)))))))
 496                   (setq result (cdr (assoc :file params))))
 497                 (org-babel-insert-result
 498                  result result-params info new-hash indent lang)
 499                 (run-hooks 'org-babel-after-execute-hook)
 500                 result))
 501           (setq call-process-region 'org-babel-call-process-region-original))))))
 502
 503 (defun org-babel-expand-body:generic (body params &optional var-lines)
 504   "Expand BODY with PARAMS.
 505 Expand a block of code with org-babel according to it's header
 506 arguments.  This generic implementation of body expansion is
 507 called for languages which have not defined their own specific
 508 org-babel-expand-body:lang function."
 509   (mapconcat #'identity (append var-lines (list body)) "\n"))
 510
 511 ;;;###autoload
 512 (defun org-babel-expand-src-block (&optional arg info params)
 513   "Expand the current source code block.
 514 Expand according to the source code block's header
 515 arguments and pop open the results in a preview buffer."
 516   (interactive)
 517   (let* ((info (or info (org-babel-get-src-block-info)))
 518          (lang (nth 0 info))
 519          (params (setf (nth 2 info)
 520                        (sort (org-babel-merge-params (nth 2 info) params)
 521                              (lambda (el1 el2) (string< (symbol-name (car el1))
 522                                                    (symbol-name (car el2)))))))
 523          (body (setf (nth 1 info)
 524                      (if (and (cdr (assoc :noweb params))
 525                               (string= "yes" (cdr (assoc :noweb params))))
 526                          (org-babel-expand-noweb-references info) (nth 1 info))))
 527          (expand-cmd (intern (concat "org-babel-expand-body:" lang)))
 528          (assignments-cmd (intern (concat "org-babel-variable-assignments:"
 529                                           lang)))
 530          (expanded
 531           (if (fboundp expand-cmd) (funcall expand-cmd body params)
 532             (org-babel-expand-body:generic
 533              body params (and (fboundp assignments-cmd)
 534                               (funcall assignments-cmd params))))))
 535     (org-edit-src-code
 536      nil expanded (concat "*Org-Babel Preview " (buffer-name) "[ " lang " ]*"))))
 537
 538 (defun org-babel-edit-distance (s1 s2)
 539   "Return the edit (levenshtein) distance between strings S1 S2."
 540   (let* ((l1 (length s1))
 541          (l2 (length s2))
 542          (dist (map 'vector (lambda (_) (make-vector (1+ l2) nil))
 543                     (number-sequence 1 (1+ l1)))))
 544     (flet ((in (i j) (aref (aref dist i) j))
 545            (mmin (&rest lst) (apply #'min (remove nil lst))))
 546       (setf (aref (aref dist 0) 0) 0)
 547       (dolist (i (number-sequence 1 l1))
 548         (dolist (j (number-sequence 1 l2))
 549           (setf (aref (aref dist i) j)
 550                 (+ (if (equal (aref s1 (1- i)) (aref s2 (1- j))) 0 1)
 551                    (mmin (in (1- i) j) (in i (1- j)) (in (1- i) (1- j)))))))
 552       (in l1 l2))))
 553
 554 ;;;###autoload
 555 (defun org-babel-check-src-block ()
 556   "Check for misspelled header arguments in the current code block."
 557   (interactive)
 558   ;; TODO: report malformed code block
 559   ;; TODO: report incompatible combinations of header arguments
 560   ;; TODO: report uninitialized variables
 561   (let ((too-close 2)) ;; <- control closeness to report potential match
 562     (dolist (header (mapcar (lambda (arg) (substring (symbol-name (car arg)) 1))
 563                             (and (org-babel-where-is-src-block-head)
 564                                  (org-babel-parse-header-arguments
 565                                   (org-babel-clean-text-properties
 566                                    (match-string 4))))))
 567       (dolist (name (mapcar #'symbol-name org-babel-header-arg-names))
 568         (when (and (not (string= header name))
 569                    (<= (org-babel-edit-distance header name) too-close))
 570           (error "supplied header \"%S\" is suspiciously close to \"%S\""
 571                  header name))))
 572     (message "No suspicious header arguments found.")))
 573
 574 ;;;###autoload
 575 (defun org-babel-load-in-session (&optional arg info)
 576   "Load the body of the current source-code block.
 577 Evaluate the header arguments for the source block before
 578 entering the session.  After loading the body this pops open the
 579 session."
 580   (interactive)
 581   (let* ((info (or info (org-babel-get-src-block-info)))
 582          (lang (nth 0 info))
 583          (params (nth 2 info))
 584          (body (setf (nth 1 info)
 585                      (if (and (cdr (assoc :noweb params))
 586                               (string= "yes" (cdr (assoc :noweb params))))
 587                          (org-babel-expand-noweb-references info)
 588                        (nth 1 info))))
 589          (session (cdr (assoc :session params)))
 590          (dir (cdr (assoc :dir params)))
 591          (default-directory
 592            (or (and dir (file-name-as-directory dir)) default-directory))
 593          (cmd (intern (concat "org-babel-load-session:" lang))))
 594     (unless (fboundp cmd)
 595       (error "No org-babel-load-session function for %s!" lang))
 596     (pop-to-buffer (funcall cmd session body params))
 597     (end-of-line 1)))
 598
 599 ;;;###autoload
 600 (defun org-babel-initiate-session (&optional arg info)
 601   "Initiate session for current code block.
 602 If called with a prefix argument then resolve any variable
 603 references in the header arguments and assign these variables in
 604 the session. Copy the body of the code block to the kill ring."
 605   (interactive "P")
 606   (let* ((info (or info (org-babel-get-src-block-info (not arg))))
 607          (lang (nth 0 info))
 608          (body (nth 1 info))
 609          (params (nth 2 info))
 610          (session (cdr (assoc :session params)))
 611          (dir (cdr (assoc :dir params)))
 612          (default-directory
 613            (or (and dir (file-name-as-directory dir)) default-directory))
 614          (init-cmd (intern (format "org-babel-%s-initiate-session" lang)))
 615          (prep-cmd (intern (concat "org-babel-prep-session:" lang))))
 616     (if (and (stringp session) (string= session "none"))
 617         (error "This block is not using a session!"))
 618     (unless (fboundp init-cmd)
 619       (error "No org-babel-initiate-session function for %s!" lang))
 620     (with-temp-buffer (insert (org-babel-trim body))
 621                       (copy-region-as-kill (point-min) (point-max)))
 622     (when arg
 623       (unless (fboundp prep-cmd)
 624         (error "No org-babel-prep-session function for %s!" lang))
 625       (funcall prep-cmd session params))
 626     (funcall init-cmd session params)))
 627
 628 ;;;###autoload
 629 (defun org-babel-switch-to-session (&optional arg info)
 630   "Switch to the session of the current code block.
 631 Uses `org-babel-initiate-session' to start the session. If called
 632 with a prefix argument then this is passed on to
 633 `org-babel-initiate-session'."
 634   (interactive "P")
 635   (pop-to-buffer (org-babel-initiate-session arg info))
 636   (end-of-line 1))
 637
 638 (defalias 'org-babel-pop-to-session 'org-babel-switch-to-session)
 639
 640 ;;;###autoload
 641 (defun org-babel-switch-to-session-with-code (&optional arg info)
 642   "Switch to code buffer and display session."
 643   (interactive "P")
 644   (flet ((swap-windows
 645           ()
 646           (let ((other-window-buffer (window-buffer (next-window))))
 647             (set-window-buffer (next-window) (current-buffer))
 648             (set-window-buffer (selected-window) other-window-buffer))
 649           (other-window 1)))
 650     (let ((info (org-babel-get-src-block-info))
 651           (org-src-window-setup 'reorganize-frame))
 652       (save-excursion
 653         (org-babel-switch-to-session arg info))
 654       (org-edit-src-code))
 655     (swap-windows)))
 656
 657 (defmacro org-babel-do-in-edit-buffer (&rest body)
 658   "Evaluate BODY in edit buffer if there is a code block at point.
 659 Return t if a code block was found at point, nil otherwise."
 660   `(let ((org-src-window-setup 'switch-invisibly))
 661      (when (and (org-babel-where-is-src-block-head)
 662                 (org-edit-src-code nil nil nil))
 663        (unwind-protect (progn ,@body)
 664          (if (org-bound-and-true-p org-edit-src-from-org-mode)
 665              (org-edit-src-exit)))
 666        t)))
 667 (def-edebug-spec org-babel-do-in-edit-buffer (body))
 668
 669 (defun org-babel-do-key-sequence-in-edit-buffer (key)
 670   "Read key sequence and execute the command in edit buffer.
 671 Enter a key sequence to be executed in the language major-mode
 672 edit buffer. For example, TAB will alter the contents of the
 673 Org-mode code block according to the effect of TAB in the
 674 language major-mode buffer. For languages that support
 675 interactive sessions, this can be used to send code from the Org
 676 buffer to the session for evaluation using the native major-mode
 677 evaluation mechanisms."
 678   (interactive "kEnter key-sequence to execute in edit buffer: ")
 679   (org-babel-do-in-edit-buffer
 680    (call-interactively
 681     (key-binding (or key (read-key-sequence nil))))))
 682
 683 (defvar org-bracket-link-regexp)
 684 ;;;###autoload
 685 (defun org-babel-open-src-block-result (&optional re-run)
 686   "If `point' is on a src block then open the results of the
 687 source code block, otherwise return nil.  With optional prefix
 688 argument RE-RUN the source-code block is evaluated even if
 689 results already exist."
 690   (interactive "P")
 691   (let ((info (org-babel-get-src-block-info)))
 692     (when info
 693       (save-excursion
 694         ;; go to the results, if there aren't any then run the block
 695         (goto-char (or (and (not re-run) (org-babel-where-is-src-block-result))
 696                        (progn (org-babel-execute-src-block)
 697                               (org-babel-where-is-src-block-result))))
 698         (end-of-line 1)
 699         (while (looking-at "[\n\r\t\f ]") (forward-char 1))
 700         ;; open the results
 701         (if (looking-at org-bracket-link-regexp)
 702             ;; file results
 703             (org-open-at-point)
 704           (let ((r (org-babel-format-result
 705                     (org-babel-read-result) (cdr (assoc :sep (nth 2 info))))))
 706             (pop-to-buffer (get-buffer-create "*Org-Babel Results*"))
 707             (delete-region (point-min) (point-max))
 708             (insert r)))
 709         t))))
 710
 711 ;;;###autoload
 712 (defmacro org-babel-map-src-blocks (file &rest body)
 713   "Evaluate BODY forms on each source-block in FILE.
 714 If FILE is nil evaluate BODY forms on source blocks in current
 715 buffer.  During evaluation of BODY the following local variables
 716 are set relative to the currently matched code block.
 717
 718 full-block ------- string holding the entirety of the code block
 719 beg-block -------- point at the beginning of the code block
 720 end-block -------- point at the end of the matched code block
 721 lang ------------- string holding the language of the code block
 722 beg-lang --------- point at the beginning of the lang
 723 end-lang --------- point at the end of the lang
 724 switches --------- string holding the switches
 725 beg-switches ----- point at the beginning of the switches
 726 end-switches ----- point at the end of the switches
 727 header-args ------ string holding the header-args
 728 beg-header-args -- point at the beginning of the header-args
 729 end-header-args -- point at the end of the header-args
 730 body ------------- string holding the body of the code block
 731 beg-body --------- point at the beginning of the body
 732 end-body --------- point at the end of the body"
 733   (declare (indent 1))
 734   (let ((tempvar (make-symbol "file")))
 735     `(let* ((,tempvar ,file)
 736             (visited-p (or (null ,tempvar)
 737                            (get-file-buffer (expand-file-name ,tempvar))))
 738             (point (point)) to-be-removed)
 739        (save-window-excursion
 740          (when ,tempvar (find-file ,tempvar))
 741          (setq to-be-removed (current-buffer))
 742          (goto-char (point-min))
 743          (while (re-search-forward org-babel-src-block-regexp nil t)
 744            (goto-char (match-beginning 0))
 745            (let ((full-block (match-string 0))
 746                  (beg-block (match-beginning 0))
 747                  (end-block (match-end 0))
 748                  (lang (match-string 2))
 749                  (beg-lang (match-beginning 2))
 750                  (end-lang (match-end 2))
 751                  (switches (match-string 3))
 752                  (beg-switches (match-beginning 3))
 753                  (end-switches (match-end 3))
 754                  (header-args (match-string 4))
 755                  (beg-header-args (match-beginning 4))
 756                  (end-header-args (match-end 4))
 757                  (body (match-string 5))
 758                  (beg-body (match-beginning 5))
 759                  (end-body (match-end 5)))
 760              ,@body
 761              (goto-char end-block))))
 762        (unless visited-p (kill-buffer to-be-removed))
 763        (goto-char point))))
 764 (def-edebug-spec org-babel-map-src-blocks (form body))
 765
 766 ;;;###autoload
 767 (defmacro org-babel-map-inline-src-blocks (file &rest body)
 768   "Evaluate BODY forms on each inline source-block in FILE.
 769 If FILE is nil evaluate BODY forms on source blocks in current
 770 buffer."
 771   (declare (indent 1))
 772   (let ((tempvar (make-symbol "file")))
 773     `(let* ((,tempvar ,file)
 774             (visited-p (or (null ,tempvar)
 775                            (get-file-buffer (expand-file-name ,tempvar))))
 776             (point (point)) to-be-removed)
 777        (save-window-excursion
 778          (when ,tempvar (find-file ,tempvar))
 779          (setq to-be-removed (current-buffer))
 780          (goto-char (point-min))
 781          (while (re-search-forward org-babel-inline-src-block-regexp nil t)
 782            (goto-char (match-beginning 1))
 783            (save-match-data ,@body)
 784            (goto-char (match-end 0))))
 785        (unless visited-p (kill-buffer to-be-removed))
 786        (goto-char point))))
 787 (def-edebug-spec org-babel-map-inline-src-blocks (form body))
 788
 789 ;;;###autoload
 790 (defun org-babel-execute-buffer (&optional arg)
 791   "Execute source code blocks in a buffer.
 792 Call `org-babel-execute-src-block' on every source block in
 793 the current buffer."
 794   (interactive "P")
 795   (org-babel-eval-wipe-error-buffer)
 796   (org-save-outline-visibility t
 797     (org-babel-map-src-blocks nil
 798       (org-babel-execute-src-block arg))
 799     (org-babel-map-inline-src-blocks nil
 800       (org-babel-execute-src-block arg))))
 801
 802 ;;;###autoload
 803 (defun org-babel-execute-subtree (&optional arg)
 804   "Execute source code blocks in a subtree.
 805 Call `org-babel-execute-src-block' on every source block in
 806 the current subtree."
 807   (interactive "P")
 808   (save-restriction
 809     (save-excursion
 810       (org-narrow-to-subtree)
 811       (org-babel-execute-buffer arg)
 812       (widen))))
 813
 814 ;;;###autoload
 815 (defun org-babel-sha1-hash (&optional info)
 816   "Generate an sha1 hash based on the value of info."
 817   (interactive)
 818   (let ((print-level nil)
 819         (info (or info (org-babel-get-src-block-info))))
 820     (setf (nth 2 info)
 821           (sort (copy-sequence (nth 2 info))
 822                 (lambda (a b) (string< (car a) (car b)))))
 823     (labels ((rm (lst)
 824                  (dolist (p '("replace" "silent" "append" "prepend"))
 825                    (setq lst (remove p lst)))
 826                  lst)
 827              (norm (arg)
 828                    (let ((v (if (and (listp (cdr arg)) (null (cddr arg)))
 829                                 (copy-sequence (cdr arg))
 830                               (cdr arg))))
 831                      (when (and v (not (and (sequencep v)
 832                                             (not (consp v))
 833                                             (= (length v) 0))))
 834                        (cond
 835                         ((and (listp v) ; lists are sorted
 836                               (member (car arg) '(:result-params)))
 837                          (sort (rm v) #'string<))
 838                         ((and (stringp v) ; strings are sorted
 839                               (member (car arg) '(:results :exports)))
 840                          (mapconcat #'identity (sort (rm (split-string v))
 841                                                      #'string<) " "))
 842                         (t v))))))
 843       ((lambda (hash)
 844          (when (org-called-interactively-p 'interactive) (message hash)) hash)
 845        (let ((it (format "%s-%s"
 846                          (mapconcat
 847                           #'identity
 848                           (delq nil (mapcar (lambda (arg)
 849                                               (let ((normalized (norm arg)))
 850                                                 (when normalized
 851                                                   (format "%S" normalized))))
 852                                             (nth 2 info))) ":")
 853                          (nth 1 info))))
 854          (sha1 it))))))
 855
 856 (defun org-babel-current-result-hash ()
 857   "Return the in-buffer hash associated with INFO."
 858   (org-babel-where-is-src-block-result)
 859   (org-babel-clean-text-properties (match-string 3)))
 860
 861 (defun org-babel-hide-hash ()
 862   "Hide the hash in the current results line.
 863 Only the initial `org-babel-hash-show' characters of the hash
 864 will remain visible."
 865   (add-to-invisibility-spec '(org-babel-hide-hash . t))
 866   (save-excursion
 867     (when (and (re-search-forward org-babel-result-regexp nil t)
 868                (match-string 3))
 869       (let* ((start (match-beginning 3))
 870              (hide-start (+ org-babel-hash-show start))
 871              (end (match-end 3))
 872              (hash (match-string 3))
 873              ov1 ov2)
 874         (setq ov1 (make-overlay start hide-start))
 875         (setq ov2 (make-overlay hide-start end))
 876         (overlay-put ov2 'invisible 'org-babel-hide-hash)
 877         (overlay-put ov1 'babel-hash hash)))))
 878
 879 (defun org-babel-hide-all-hashes ()
 880   "Hide the hash in the current buffer.
 881 Only the initial `org-babel-hash-show' characters of each hash
 882 will remain visible.  This function should be called as part of
 883 the `org-mode-hook'."
 884   (save-excursion
 885     (while (re-search-forward org-babel-result-regexp nil t)
 886       (goto-char (match-beginning 0))
 887       (org-babel-hide-hash)
 888       (goto-char (match-end 0)))))
 889 (add-hook 'org-mode-hook 'org-babel-hide-all-hashes)
 890
 891 (defun org-babel-hash-at-point (&optional point)
 892   "Return the value of the hash at POINT.
 893 The hash is also added as the last element of the kill ring.
 894 This can be called with C-c C-c."
 895   (interactive)
 896   (let ((hash (car (delq nil (mapcar
 897                               (lambda (ol) (overlay-get ol 'babel-hash))
 898                               (overlays-at (or point (point))))))))
 899     (when hash (kill-new hash) (message hash))))
 900 (add-hook 'org-ctrl-c-ctrl-c-hook 'org-babel-hash-at-point)
 901
 902 (defun org-babel-result-hide-spec ()
 903   "Hide portions of results lines.
 904 Add `org-babel-hide-result' as an invisibility spec for hiding
 905 portions of results lines."
 906   (add-to-invisibility-spec '(org-babel-hide-result . t)))
 907 (add-hook 'org-mode-hook 'org-babel-result-hide-spec)
 908
 909 (defvar org-babel-hide-result-overlays nil
 910   "Overlays hiding results.")
 911
 912 (defun org-babel-result-hide-all ()
 913   "Fold all results in the current buffer."
 914   (interactive)
 915   (org-babel-show-result-all)
 916   (save-excursion
 917     (while (re-search-forward org-babel-result-regexp nil t)
 918       (save-excursion (goto-char (match-beginning 0))
 919                       (org-babel-hide-result-toggle-maybe)))))
 920
 921 (defun org-babel-show-result-all ()
 922   "Unfold all results in the current buffer."
 923   (mapc 'delete-overlay org-babel-hide-result-overlays)
 924   (setq org-babel-hide-result-overlays nil))
 925
 926 ;;;###autoload
 927 (defun org-babel-hide-result-toggle-maybe ()
 928   "Toggle visibility of result at point."
 929   (interactive)
 930   (let ((case-fold-search t))
 931     (if (save-excursion
 932           (beginning-of-line 1)
 933           (looking-at org-babel-result-regexp))
 934         (progn (org-babel-hide-result-toggle)
 935                t) ;; to signal that we took action
 936       nil))) ;; to signal that we did not
 937
 938 (defun org-babel-hide-result-toggle (&optional force)
 939   "Toggle the visibility of the current result."
 940   (interactive)
 941   (save-excursion
 942     (beginning-of-line)
 943     (if (re-search-forward org-babel-result-regexp nil t)
 944         (let ((start (progn (beginning-of-line 2) (- (point) 1)))
 945               (end (progn (goto-char (- (org-babel-result-end) 1)) (point)))
 946               ov)
 947           (if (memq t (mapcar (lambda (overlay)
 948                                 (eq (overlay-get overlay 'invisible)
 949                                     'org-babel-hide-result))
 950                               (overlays-at start)))
 951               (if (or (not force) (eq force 'off))
 952                   (mapc (lambda (ov)
 953                           (when (member ov org-babel-hide-result-overlays)
 954                             (setq org-babel-hide-result-overlays
 955                                   (delq ov org-babel-hide-result-overlays)))
 956                           (when (eq (overlay-get ov 'invisible)
 957                                     'org-babel-hide-result)
 958                             (delete-overlay ov)))
 959                         (overlays-at start)))
 960             (setq ov (make-overlay start end))
 961             (overlay-put ov 'invisible 'org-babel-hide-result)
 962             ;; make the block accessible to isearch
 963             (overlay-put
 964              ov 'isearch-open-invisible
 965              (lambda (ov)
 966                (when (member ov org-babel-hide-result-overlays)
 967                  (setq org-babel-hide-result-overlays
 968                        (delq ov org-babel-hide-result-overlays)))
 969                (when (eq (overlay-get ov 'invisible)
 970                          'org-babel-hide-result)
 971                  (delete-overlay ov))))
 972             (push ov org-babel-hide-result-overlays)))
 973       (error "Not looking at a result line"))))
 974
 975 ;; org-tab-after-check-for-cycling-hook
 976 (add-hook 'org-tab-first-hook 'org-babel-hide-result-toggle-maybe)
 977 ;; Remove overlays when changing major mode
 978 (add-hook 'org-mode-hook
 979           (lambda () (org-add-hook 'change-major-mode-hook
 980                                    'org-babel-show-result-all 'append 'local)))
 981
 982 (defvar org-file-properties)
 983 (defun org-babel-params-from-properties (&optional lang)
 984   "Retrieve parameters specified as properties.
 985 Return an association list of any source block params which
 986 may be specified in the properties of the current outline entry."
 987   (save-match-data
 988     (let (val sym)
 989       (delq nil
 990             (mapcar
 991              (lambda (header-arg)
 992                (and (setq val (org-entry-get (point) header-arg t))
 993                     (cons (intern (concat ":" header-arg))
 994                           (org-babel-read val))))
 995              (mapcar
 996               'symbol-name
 997               (append
 998                org-babel-header-arg-names
 999                (progn
1000                  (setq sym (intern (concat "org-babel-header-arg-names:" lang)))
1001                  (and (boundp sym) (eval sym))))))))))
1002
1003 (defun org-babel-params-from-buffer ()
1004   "Retrieve per-buffer parameters.
1005  Return an association list of any source block params which
1006 may be specified in the current buffer."
1007   (let (local-properties)
1008     (save-match-data
1009       (save-excursion
1010         (save-restriction
1011           (widen)
1012           (goto-char (point-min))
1013           (while (re-search-forward
1014                   (org-make-options-regexp (list "BABEL" "PROPERTIES")) nil t)
1015             (setq local-properties
1016                   (org-babel-merge-params
1017                    local-properties
1018                    (org-babel-parse-header-arguments
1019                     (org-match-string-no-properties 2)))))
1020           local-properties)))))
1021
1022 (defvar org-src-preserve-indentation)
1023 (defun org-babel-parse-src-block-match ()
1024   "Parse the results from a match of the `org-babel-src-block-regexp'."
1025   (let* ((block-indentation (length (match-string 1)))
1026          (lang (org-babel-clean-text-properties (match-string 2)))
1027          (lang-headers (intern (concat "org-babel-default-header-args:" lang)))
1028          (switches (match-string 3))
1029          (body (org-babel-clean-text-properties
1030                 (let* ((body (match-string 5))
1031                        (sub-length (- (length body) 1)))
1032                   (if (and (> sub-length 0)
1033                            (string= "\n" (substring body sub-length)))
1034                       (substring body 0 sub-length)
1035                     (or body "")))))
1036          (preserve-indentation (or org-src-preserve-indentation
1037                                    (string-match "-i\\>" switches))))
1038     (list lang
1039           ;; get block body less properties, protective commas, and indentation
1040           (with-temp-buffer
1041             (save-match-data
1042               (insert (org-babel-strip-protective-commas body))
1043               (unless preserve-indentation (org-do-remove-indentation))
1044               (buffer-string)))
1045           (org-babel-merge-params
1046            org-babel-default-header-args
1047            (org-babel-params-from-buffer)
1048            (org-babel-params-from-properties lang)
1049            (if (boundp lang-headers) (eval lang-headers) nil)
1050            (org-babel-parse-header-arguments
1051             (org-babel-clean-text-properties (or (match-string 4) ""))))
1052           switches
1053           block-indentation)))
1054
1055 (defun org-babel-parse-inline-src-block-match ()
1056   "Parse the results from a match of the `org-babel-inline-src-block-regexp'."
1057   (let* ((lang (org-babel-clean-text-properties (match-string 2)))
1058          (lang-headers (intern (concat "org-babel-default-header-args:" lang))))
1059     (list lang
1060           (org-babel-strip-protective-commas
1061            (org-babel-clean-text-properties (match-string 5)))
1062           (org-babel-merge-params
1063            org-babel-default-inline-header-args
1064            (org-babel-params-from-buffer)
1065            (org-babel-params-from-properties lang)
1066            (if (boundp lang-headers) (eval lang-headers) nil)
1067            (org-babel-parse-header-arguments
1068             (org-babel-clean-text-properties (or (match-string 4) "")))))))
1069
1070 (defun org-babel-parse-header-arguments (arg-string)
1071   "Parse a string of header arguments returning an alist."
1072   (when (> (length arg-string) 0)
1073     (delq nil
1074           (mapcar
1075            (lambda (arg)
1076              (if (string-match
1077                   "\\([^ \f\t\n\r\v]+\\)[ \f\t\n\r\v]+\\([^ \f\t\n\r\v]+.*\\)"
1078                   arg)
1079                  (cons (intern (match-string 1 arg))
1080                        (org-babel-read (org-babel-chomp (match-string 2 arg))))
1081                (cons (intern (org-babel-chomp arg)) nil)))
1082            (let ((balance 0) (partial nil) (lst nil) (last 0))
1083              (mapc (lambda (ch)  ; split on [] balanced instances of [ \t]:
1084                      (setq balance (+ balance
1085                                       (cond ((equal 91 ch) 1)
1086                                             ((equal 93 ch) -1)
1087                                             (t 0))))
1088                      (setq partial (cons ch partial))
1089                      (when (and (= ch 58) (= balance 0)
1090                                 (or (= last 32) (= last 9)))
1091                        (setq lst (cons (apply #'string (nreverse (cddr partial)))
1092                                        lst))
1093                        (setq partial (list ch)))
1094                      (setq last ch))
1095                    (string-to-list arg-string))
1096              (nreverse (cons (apply #'string (nreverse partial)) lst)))))))
1097
1098 (defun org-babel-process-params (params)
1099   "Expand variables in PARAMS and add summary parameters."
1100   (let* ((vars-and-names (org-babel-disassemble-tables
1101                           (mapcar (lambda (el)
1102                                     (if (consp (cdr el))
1103                                         (cdr el) (org-babel-ref-parse (cdr el))))
1104                                   (org-babel-get-header params :var))
1105                           (cdr (assoc :hlines params))
1106                           (cdr (assoc :colnames params))
1107                           (cdr (assoc :rownames params))))
1108          (raw-result (or (cdr (assoc :results params)) ""))
1109          (result-params (append
1110                          (split-string (if (stringp raw-result)
1111                                            raw-result
1112                                          (eval raw-result)))
1113                          (cdr (assoc :result-params params)))))
1114     (append
1115      (mapcar (lambda (var) (cons :var var)) (car vars-and-names))
1116      (list
1117       (cons :colname-names (or (cdr (assoc :colname-names params))
1118                                (cadr  vars-and-names)))
1119       (cons :rowname-names (or (cdr (assoc :rowname-names params))
1120                                (caddr vars-and-names)))
1121       (cons :result-params result-params)
1122       (cons :result-type  (cond ((member "output" result-params) 'output)
1123                                 ((member "value" result-params) 'value)
1124                                 (t 'value))))
1125      (org-babel-get-header params :var 'other))))
1126
1127 ;; row and column names
1128 (defun org-babel-del-hlines (table)
1129   "Remove all 'hlines from TABLE."
1130   (remove 'hline table))
1131
1132 (defun org-babel-get-colnames (table)
1133   "Return the column names of TABLE.
1134 Return a cons cell, the `car' of which contains the TABLE less
1135 colnames, and the `cdr' of which contains a list of the column
1136 names."
1137   (if (equal 'hline (nth 1 table))
1138       (cons (cddr table) (car table))
1139     (cons (cdr table) (car table))))
1140
1141 (defun org-babel-get-rownames (table)
1142   "Return the row names of TABLE.
1143 Return a cons cell, the `car' of which contains the TABLE less
1144 colnames, and the `cdr' of which contains a list of the column
1145 names.  Note: this function removes any hlines in TABLE."
1146   (flet ((trans (table) (apply #'mapcar* #'list table)))
1147     (let* ((width (apply 'max
1148                          (mapcar (lambda (el) (if (listp el) (length el) 0)) table)))
1149            (table (trans (mapcar (lambda (row)
1150                                    (if (not (equal row 'hline))
1151                                        row
1152                                      (setq row '())
1153                                      (dotimes (n width)
1154                                        (setq row (cons 'hline row)))
1155                                      row))
1156                                  table))))
1157       (cons (mapcar (lambda (row) (if (equal (car row) 'hline) 'hline row))
1158                     (trans (cdr table)))
1159             (remove 'hline (car table))))))
1160
1161 (defun org-babel-put-colnames (table colnames)
1162   "Add COLNAMES to TABLE if they exist."
1163   (if colnames (apply 'list colnames 'hline table) table))
1164
1165 (defun org-babel-put-rownames (table rownames)
1166   "Add ROWNAMES to TABLE if they exist."
1167   (if rownames
1168       (mapcar (lambda (row)
1169                 (if (listp row)
1170                     (cons (or (pop rownames) "") row)
1171                   row)) table)
1172     table))
1173
1174 (defun org-babel-pick-name (names selector)
1175   "Select one out of an alist of row or column names.
1176 SELECTOR can be either a list of names in which case those names
1177 will be returned directly, or an index into the list NAMES in
1178 which case the indexed names will be return."
1179   (if (listp selector)
1180       selector
1181     (when names
1182       (if (and selector (symbolp selector) (not (equal t selector)))
1183           (cdr (assoc selector names))
1184         (if (integerp selector)
1185             (nth (- selector 1) names)
1186           (cdr (car (last names))))))))
1187
1188 (defun org-babel-disassemble-tables (vars hlines colnames rownames)
1189   "Parse tables for further processing.
1190 Process the variables in VARS according to the HLINES,
1191 ROWNAMES and COLNAMES header arguments.  Return a list consisting
1192 of the vars, cnames and rnames."
1193   (let (cnames rnames)
1194     (list
1195      (mapcar
1196       (lambda (var)
1197         (when (listp (cdr var))
1198           (when (and (not (equal colnames "no"))
1199                      (or colnames (and (equal (nth 1 (cdr var)) 'hline)
1200                                        (not (member 'hline (cddr (cdr var)))))))
1201             (let ((both (org-babel-get-colnames (cdr var))))
1202               (setq cnames (cons (cons (car var) (cdr both))
1203                                  cnames))
1204               (setq var (cons (car var) (car both)))))
1205           (when (and rownames (not (equal rownames "no")))
1206             (let ((both (org-babel-get-rownames (cdr var))))
1207               (setq rnames (cons (cons (car var) (cdr both))
1208                                  rnames))
1209               (setq var (cons (car var) (car both)))))
1210           (when (and hlines (not (equal hlines "yes")))
1211             (setq var (cons (car var) (org-babel-del-hlines (cdr var))))))
1212         var)
1213       vars)
1214      cnames rnames)))
1215
1216 (defun org-babel-reassemble-table (table colnames rownames)
1217   "Add column and row names to a table.
1218 Given a TABLE and set of COLNAMES and ROWNAMES add the names
1219 to the table for reinsertion to org-mode."
1220   (if (listp table)
1221       ((lambda (table)
1222          (if (and colnames (listp (car table)) (= (length (car table))
1223                                                   (length colnames)))
1224              (org-babel-put-colnames table colnames) table))
1225        (if (and rownames (= (length table) (length rownames)))
1226            (org-babel-put-rownames table rownames) table))
1227     table))
1228
1229 (defun org-babel-where-is-src-block-head ()
1230   "Find where the current source block begins.
1231 Return the point at the beginning of the current source
1232 block.  Specifically at the beginning of the #+BEGIN_SRC line.
1233 If the point is not on a source block then return nil."
1234   (let ((initial (point)) top bottom)
1235     (or
1236      (save-excursion ;; on a source name line or a #+header line
1237        (beginning-of-line 1)
1238        (and (or (looking-at org-babel-src-name-regexp)
1239                 (looking-at org-babel-multi-line-header-regexp))
1240             (progn
1241               (while (and (forward-line 1)
1242                           (looking-at org-babel-multi-line-header-regexp)))
1243               (looking-at org-babel-src-block-regexp))
1244             (point)))
1245      (save-excursion ;; on a #+begin_src line
1246        (beginning-of-line 1)
1247        (and (looking-at org-babel-src-block-regexp)
1248             (point)))
1249      (save-excursion ;; inside a src block
1250        (and
1251         (re-search-backward "^[ \t]*#\\+begin_src" nil t) (setq top (point))
1252         (re-search-forward "^[ \t]*#\\+end_src" nil t) (setq bottom (point))
1253         (< top initial) (< initial bottom)
1254         (progn (goto-char top) (beginning-of-line 1)
1255                (looking-at org-babel-src-block-regexp))
1256         (point))))))
1257
1258 ;;;###autoload
1259 (defun org-babel-goto-src-block-head ()
1260   "Go to the beginning of the current code block."
1261   (interactive)
1262   ((lambda (head)
1263      (if head (goto-char head) (error "not currently in a code block")))
1264    (org-babel-where-is-src-block-head)))
1265
1266 ;;;###autoload
1267 (defun org-babel-goto-named-src-block (name)
1268   "Go to a named source-code block."
1269   (interactive
1270    (let ((completion-ignore-case t))
1271      (list (org-icompleting-read "source-block name: "
1272                                  (org-babel-src-block-names) nil t))))
1273   (let ((point (org-babel-find-named-block name)))
1274     (if point
1275         ;; taken from `org-open-at-point'
1276         (progn (goto-char point) (org-show-context))
1277       (message "source-code block '%s' not found in this buffer" name))))
1278
1279 (defun org-babel-find-named-block (name)
1280   "Find a named source-code block.
1281 Return the location of the source block identified by source
1282 NAME, or nil if no such block exists. Set match data according to
1283 org-babel-named-src-block-regexp."
1284   (save-excursion
1285     (let ((case-fold-search t)
1286           (regexp (org-babel-named-src-block-regexp-for-name name)) msg)
1287       (goto-char (point-min))
1288       (when (or (re-search-forward regexp nil t)
1289                 (re-search-backward regexp nil t))
1290         (match-beginning 0)))))
1291
1292 (defun org-babel-src-block-names (&optional file)
1293   "Returns the names of source blocks in FILE or the current buffer."
1294   (save-excursion
1295     (when file (find-file file)) (goto-char (point-min))
1296     (let (names)
1297       (while (re-search-forward org-babel-src-name-w-name-regexp nil t)
1298         (setq names (cons (match-string 4) names)))
1299       names)))
1300
1301 ;;;###autoload
1302 (defun org-babel-goto-named-result (name)
1303   "Go to a named result."
1304   (interactive
1305    (let ((completion-ignore-case t))
1306      (list (org-icompleting-read "source-block name: "
1307                                  (org-babel-result-names) nil t))))
1308   (let ((point (org-babel-find-named-result name)))
1309     (if point
1310         ;; taken from `org-open-at-point'
1311         (progn (goto-char point) (org-show-context))
1312       (message "result '%s' not found in this buffer" name))))
1313
1314 (defun org-babel-find-named-result (name)
1315   "Find a named result.
1316 Return the location of the result named NAME in the current
1317 buffer or nil if no such result exists."
1318   (save-excursion
1319     (goto-char (point-min))
1320     (when (re-search-forward
1321            (concat org-babel-result-regexp
1322                    "[ \t]" (regexp-quote name) "[ \t\n\f\v\r]") nil t)
1323       (beginning-of-line 0) (point))))
1324
1325 (defun org-babel-result-names (&optional file)
1326   "Returns the names of results in FILE or the current buffer."
1327   (save-excursion
1328     (when file (find-file file)) (goto-char (point-min))
1329     (let (names)
1330       (while (re-search-forward org-babel-result-w-name-regexp nil t)
1331         (setq names (cons (match-string 4) names)))
1332       names)))
1333
1334 ;;;###autoload
1335 (defun org-babel-next-src-block (&optional arg)
1336   "Jump to the next source block.
1337 With optional prefix argument ARG, jump forward ARG many source blocks."
1338   (interactive "P")
1339   (when (looking-at org-babel-src-block-regexp) (forward-char 1))
1340   (condition-case nil
1341       (re-search-forward org-babel-src-block-regexp nil nil (or arg 1))
1342     (error (error "No further code blocks")))
1343   (goto-char (match-beginning 0)) (org-show-context))
1344
1345 ;;;###autoload
1346 (defun org-babel-previous-src-block (&optional arg)
1347   "Jump to the previous source block.
1348 With optional prefix argument ARG, jump backward ARG many source blocks."
1349   (interactive "P")
1350   (condition-case nil
1351       (re-search-backward org-babel-src-block-regexp nil nil (or arg 1))
1352     (error (error "No previous code blocks")))
1353   (goto-char (match-beginning 0)) (org-show-context))
1354
1355 (defvar org-babel-load-languages)
1356
1357 ;;;###autoload
1358 (defun org-babel-mark-block ()
1359   "Mark current src block"
1360   (interactive)
1361   ((lambda (head)
1362      (when head
1363        (save-excursion
1364          (goto-char head)
1365          (looking-at org-babel-src-block-regexp))
1366        (push-mark (match-end 5) nil t)
1367        (goto-char (match-beginning 5))))
1368    (org-babel-where-is-src-block-head)))
1369
1370 (defun org-babel-demarcate-block (&optional arg)
1371   "Wrap or split the code in the region or on the point.
1372 When called from inside of a code block the current block is
1373 split.  When called from outside of a code block a new code block
1374 is created.  In both cases if the region is demarcated and if the
1375 region is not active then the point is demarcated."
1376   (interactive "P")
1377   (let ((info (org-babel-get-src-block-info 'light))
1378         (headers (progn (org-babel-where-is-src-block-head)
1379                         (match-string 4)))
1380         (stars (concat (make-string (or (org-current-level) 1) ?*) " ")))
1381     (if info
1382         (mapc
1383          (lambda (place)
1384            (save-excursion
1385              (goto-char place)
1386              (let ((lang (nth 0 info))
1387                    (indent (make-string (nth 5 info) ? )))
1388                (when (string-match "^[[:space:]]*$"
1389                                    (buffer-substring (point-at-bol)
1390                                                      (point-at-eol)))
1391                  (delete-region (point-at-bol) (point-at-eol)))
1392                (insert (concat
1393                         (if (looking-at "^") "" "\n")
1394                         indent "#+end_src\n"
1395                         (if arg stars indent) "\n"
1396                         indent "#+begin_src " lang
1397                         (if (> (length headers) 1)
1398                             (concat " " headers) headers)
1399                         (if (looking-at "[\n\r]")
1400                             ""
1401                           (concat "\n" (make-string (current-column) ? )))))))
1402            (move-end-of-line 2))
1403          (sort (if (region-active-p) (list (mark) (point)) (list (point))) #'>))
1404       (let ((start (point))
1405             (lang (org-icompleting-read "Lang: "
1406                                         (mapcar (lambda (el) (symbol-name (car el)))
1407                                                 org-babel-load-languages)))
1408             (body (delete-and-extract-region
1409                    (if (region-active-p) (mark) (point)) (point))))
1410         (insert (concat (if (looking-at "^") "" "\n")
1411                         (if arg (concat stars "\n") "")
1412                         "#+begin_src " lang "\n"
1413                         body
1414                         (if (or (= (length body) 0)
1415                                 (string-match "[\r\n]$" body)) "" "\n")
1416                         "#+end_src\n"))
1417         (goto-char start) (move-end-of-line 1)))))
1418
1419 (defvar org-babel-lob-one-liner-regexp)
1420 (defvar org-babel-inline-lob-one-liner-regexp)
1421 (defun org-babel-where-is-src-block-result (&optional insert info hash indent)
1422   "Find where the current source block results begin.
1423 Return the point at the beginning of the result of the current
1424 source block.  Specifically at the beginning of the results line.
1425 If no result exists for this block then create a results line
1426 following the source block."
1427   (save-excursion
1428     (let* ((on-lob-line (save-excursion
1429                           (beginning-of-line 1)
1430                           (looking-at org-babel-lob-one-liner-regexp)))
1431            (inlinep (when (org-babel-get-inline-src-block-matches)
1432                         (match-end 0)))
1433            (name (if on-lob-line
1434                      (nth 0 (org-babel-lob-get-info))
1435                    (nth 4 (or info (org-babel-get-src-block-info 'light)))))
1436            (head (unless on-lob-line (org-babel-where-is-src-block-head)))
1437            found beg end)
1438       (when head (goto-char head))
1439       (setq
1440        found ;; was there a result (before we potentially insert one)
1441        (or
1442         inlinep
1443         (and
1444          ;; named results:
1445          ;; - return t if it is found, else return nil
1446          ;; - if it does not need to be rebuilt, then don't set end
1447          ;; - if it does need to be rebuilt then do set end
1448          name (setq beg (org-babel-find-named-result name))
1449          (prog1 beg
1450            (when (and hash (not (string= hash (match-string 3))))
1451              (goto-char beg) (setq end beg) ;; beginning of result
1452              (forward-line 1)
1453              (delete-region end (org-babel-result-end)) nil)))
1454         (and
1455          ;; unnamed results:
1456          ;; - return t if it is found, else return nil
1457          ;; - if it is found, and the hash doesn't match, delete and set end
1458          (or on-lob-line (re-search-forward "^[ \t]*#\\+end_src" nil t))
1459          (progn (end-of-line 1)
1460                 (if (eobp) (insert "\n") (forward-char 1))
1461                 (setq end (point))
1462                 (or (and (not name)
1463                          (progn ;; unnamed results line already exists
1464                            (re-search-forward "[^ \f\t\n\r\v]" nil t)
1465                            (beginning-of-line 1)
1466                            (looking-at
1467                             (concat org-babel-result-regexp "\n")))
1468                          (prog1 (point)
1469                            ;; must remove and rebuild if hash!=old-hash
1470                            (if (and hash (not (string= hash (match-string 3))))
1471                                (prog1 nil
1472                                  (forward-line 1)
1473                                  (delete-region
1474                                   end (org-babel-result-end)))
1475                              (setq end nil)))))))))
1476       (if (and insert end)
1477           (progn
1478             (goto-char end)
1479             (unless beg
1480               (if (looking-at "[\n\r]") (forward-char 1) (insert "\n")))
1481             (insert (concat
1482                      (if indent
1483                          (mapconcat
1484                           (lambda (el) " ")
1485                           (org-number-sequence 1 indent) "")
1486                        "")
1487                      "#+results"
1488                      (when hash (concat "["hash"]"))
1489                      ":"
1490                      (when name (concat " " name)) "\n"))
1491             (unless beg (insert "\n") (backward-char))
1492             (beginning-of-line 0)
1493             (if hash (org-babel-hide-hash))
1494             (point))
1495         found))))
1496
1497 (defvar org-block-regexp)
1498 (defun org-babel-read-result ()
1499   "Read the result at `point' into emacs-lisp."
1500   (let ((case-fold-search t) result-string)
1501     (cond
1502      ((org-at-table-p) (org-babel-read-table))
1503      ((org-at-item-p) (org-babel-read-list))
1504      ((looking-at org-bracket-link-regexp) (org-babel-read-link))
1505      ((looking-at org-block-regexp) (org-babel-trim (match-string 4)))
1506      ((looking-at "^[ \t]*: ")
1507       (setq result-string
1508             (org-babel-trim
1509              (mapconcat (lambda (line)
1510                           (if (and (> (length line) 1)
1511                                    (string-match "^[ \t]*: \\(.+\\)" line))
1512                               (match-string 1 line)
1513                             line))
1514                         (split-string
1515                          (buffer-substring
1516                           (point) (org-babel-result-end)) "[\r\n]+")
1517                         "\n")))
1518       (or (org-babel-number-p result-string) result-string))
1519      ((looking-at org-babel-result-regexp)
1520       (save-excursion (forward-line 1) (org-babel-read-result))))))
1521
1522 (defun org-babel-read-table ()
1523   "Read the table at `point' into emacs-lisp."
1524   (mapcar (lambda (row)
1525             (if (and (symbolp row) (equal row 'hline)) row
1526               (mapcar (lambda (el) (org-babel-read el 'inhibit-lisp-eval)) row)))
1527           (org-table-to-lisp)))
1528
1529 (defun org-babel-read-list ()
1530   "Read the list at `point' into emacs-lisp."
1531   (mapcar (lambda (el) (org-babel-read el 'inhibit-lisp-eval))
1532           (mapcar #'cadr (cdr (org-list-parse-list)))))
1533
1534 (defvar org-link-types-re)
1535 (defun org-babel-read-link ()
1536   "Read the link at `point' into emacs-lisp.
1537 If the path of the link is a file path it is expanded using
1538 `expand-file-name'."
1539   (let* ((case-fold-search t)
1540          (raw (and (looking-at org-bracket-link-regexp)
1541                    (org-babel-clean-text-properties (match-string 1))))
1542          (type (and (string-match org-link-types-re raw)
1543                     (match-string 1 raw))))
1544     (cond
1545      ((not type) (expand-file-name raw))
1546      ((string= type "file")
1547       (and (string-match "file\\(.*\\):\\(.+\\)" raw)
1548            (expand-file-name (match-string 2 raw))))
1549      (t raw))))
1550
1551 (defun org-babel-format-result (result &optional sep)
1552   "Format RESULT for writing to file."
1553   (flet ((echo-res (result)
1554                    (if (stringp result) result (format "%S" result))))
1555     (if (listp result)
1556         ;; table result
1557         (orgtbl-to-generic
1558          result
1559          (list
1560           :sep (or sep "\t")
1561           :fmt 'echo-res))
1562       ;; scalar result
1563       (echo-res result))))
1564
1565 (defun org-babel-insert-result
1566   (result &optional result-params info hash indent lang)
1567   "Insert RESULT into the current buffer.
1568 By default RESULT is inserted after the end of the
1569 current source block.  With optional argument RESULT-PARAMS
1570 controls insertion of results in the org-mode file.
1571 RESULT-PARAMS can take the following values...
1572
1573 replace - (default option) insert results after the source block
1574           replacing any previously inserted results
1575
1576 silent -- no results are inserted
1577
1578 file ---- the results are interpreted as a file path, and are
1579           inserted into the buffer using the Org-mode file syntax
1580
1581 list ---- the results are interpreted as an Org-mode list.
1582
1583 raw ----- results are added directly to the Org-mode file.  This
1584           is a good option if you code block will output org-mode
1585           formatted text.
1586
1587 org ----- similar in effect to raw, only the results are wrapped
1588           in an org code block.  Similar to the raw option, on
1589           export the results will be interpreted as org-formatted
1590           text, however by wrapping the results in an org code
1591           block they can be replaced upon re-execution of the
1592           code block.
1593
1594 html ---- results are added inside of a #+BEGIN_HTML block.  This
1595           is a good option if you code block will output html
1596           formatted text.
1597
1598 latex --- results are added inside of a #+BEGIN_LATEX block.
1599           This is a good option if you code block will output
1600           latex formatted text.
1601
1602 code ---- the results are extracted in the syntax of the source
1603           code of the language being evaluated and are added
1604           inside of a #+BEGIN_SRC block with the source-code
1605           language set appropriately.  Note this relies on the
1606           optional LANG argument."
1607   (if (stringp result)
1608       (progn
1609         (setq result (org-babel-clean-text-properties result))
1610         (when (member "file" result-params)
1611           (setq result (org-babel-result-to-file result))))
1612     (unless (listp result) (setq result (format "%S" result))))
1613   (if (and result-params (member "silent" result-params))
1614       (progn
1615         (message (replace-regexp-in-string "%" "%%" (format "%S" result)))
1616         result)
1617     (save-excursion
1618       (let* ((inlinep
1619               (save-excursion
1620                 (when (or (org-babel-get-inline-src-block-matches)
1621                           (org-babel-get-lob-one-liner-matches))
1622                   (goto-char (match-end 0))
1623                   (insert (if (listp result) "\n" " "))
1624                   (point))))
1625              (existing-result (unless inlinep
1626                                 (org-babel-where-is-src-block-result
1627                                  t info hash indent)))
1628              (results-switches
1629               (cdr (assoc :results_switches (nth 2 info))))
1630              beg end)
1631         (when (and (stringp result)  ; ensure results end in a newline
1632                    (not inlinep)
1633                    (> (length result) 0)
1634                    (not (or (string-equal (substring result -1) "\n")
1635                             (string-equal (substring result -1) "\r"))))
1636           (setq result (concat result "\n")))
1637         (if (not existing-result)
1638             (setq beg (or inlinep (point)))
1639           (goto-char existing-result)
1640           (save-excursion
1641             (re-search-forward "#" nil t)
1642             (setq indent (- (current-column) 1)))
1643           (forward-line 1)
1644           (setq beg (point))
1645           (cond
1646            ((member "replace" result-params)
1647             (delete-region (point) (org-babel-result-end)))
1648            ((member "append" result-params)
1649             (goto-char (org-babel-result-end)) (setq beg (point-marker)))
1650            ((member "prepend" result-params)))) ; already there
1651         (setq results-switches
1652               (if results-switches (concat " " results-switches) ""))
1653         ;; insert results based on type
1654         (cond
1655          ;; do nothing for an empty result
1656          ((= (length result) 0))
1657          ;; insert a list if preferred
1658          ((member "list" result-params)
1659           (insert
1660            (org-babel-trim
1661             (org-list-to-generic
1662              (cons 'unordered
1663                    (mapcar
1664                     (lambda (el) (list nil (if (stringp el) el (format "%S" el))))
1665                     (if (listp result) result (list result))))
1666              '(:splicep nil :istart "- " :iend "\n")))
1667            "\n"))
1668          ;; assume the result is a table if it's not a string
1669          ((not (stringp result))
1670           (goto-char beg)
1671           (insert (concat (orgtbl-to-orgtbl
1672                            (if (or (eq 'hline (car result))
1673                                    (and (listp (car result))
1674                                         (listp (cdr (car result)))))
1675                                result (list result))
1676                            '(:fmt (lambda (cell) (format "%s" cell)))) "\n"))
1677           (goto-char beg) (when (org-at-table-p) (org-table-align)))
1678          ((member "file" result-params)
1679           (when inlinep (goto-char inlinep))
1680           (insert result))
1681          (t (goto-char beg) (insert result)))
1682         (when (listp result) (goto-char (org-table-end)))
1683         (setq end (point-marker))
1684         ;; possibly wrap result
1685         (flet ((wrap (start finish)
1686                      (goto-char beg) (insert (concat start "\n"))
1687                      (goto-char end) (insert (concat finish "\n"))
1688                      (setq end (point-marker))))
1689           (cond
1690            ((member "html" result-params)
1691             (wrap "#+BEGIN_HTML" "#+END_HTML"))
1692            ((member "latex" result-params)
1693             (wrap "#+BEGIN_LaTeX" "#+END_LaTeX"))
1694            ((member "code" result-params)
1695             (wrap (format "#+BEGIN_SRC %s%s" (or lang "none") results-switches)
1696                   "#+END_SRC"))
1697            ((member "org" result-params)
1698             (wrap "#+BEGIN_ORG" "#+END_ORG"))
1699            ((member "raw" result-params)
1700             (goto-char beg) (if (org-at-table-p) (org-cycle)))
1701            ((member "wrap" result-params)
1702             (when (and (stringp result) (not (member "file" result-params)))
1703               (org-babel-examplize-region beg end results-switches))
1704             (wrap "#+BEGIN_RESULT" "#+END_RESULT"))
1705            ((and (stringp result) (not (member "file" result-params)))
1706             (org-babel-examplize-region beg end results-switches)
1707             (setq end (point)))))
1708         ;; possibly indent the results to match the #+results line
1709         (when (and (not inlinep) (numberp indent) indent (> indent 0)
1710                    ;; in this case `table-align' does the work for us
1711                    (not (and (listp result)
1712                              (member "append" result-params))))
1713           (indent-rigidly beg end indent))))
1714     (if (= (length result) 0)
1715         (if (member "value" result-params)
1716             (message "Code block returned no value.")
1717           (message "Code block produced no output."))
1718       (message "Code block evaluation complete."))))
1719
1720 (defun org-babel-remove-result (&optional info)
1721   "Remove the result of the current source block."
1722   (interactive)
1723   (let ((location (org-babel-where-is-src-block-result nil info)) start)
1724     (when location
1725       (setq start (- location 1))
1726       (save-excursion
1727         (goto-char location) (forward-line 1)
1728         (delete-region start (org-babel-result-end))))))
1729
1730 (defun org-babel-result-end ()
1731   "Return the point at the end of the current set of results"
1732   (save-excursion
1733     (cond
1734      ((org-at-table-p) (progn (goto-char (org-table-end)) (point)))
1735      ((org-at-item-p) (let* ((struct (org-list-struct))
1736                              (prvs (org-list-prevs-alist struct)))
1737                         (org-list-get-list-end (point-at-bol) struct prvs)))
1738      (t
1739       (let ((case-fold-search t)
1740             (blocks-re (regexp-opt
1741                         (list "latex" "html" "example" "src" "result" "org"))))
1742         (if (looking-at (concat "[ \t]*#\\+begin_" blocks-re))
1743             (progn (re-search-forward (concat "[ \t]*#\\+end_" blocks-re) nil t)
1744                    (forward-char 1))
1745           (while (looking-at "[ \t]*\\(: \\|\\[\\[\\)")
1746             (forward-line 1))))
1747       (point)))))
1748
1749 (defun org-babel-result-to-file (result)
1750   "Convert RESULT into an `org-mode' link.
1751 If the `default-directory' is different from the containing
1752 file's directory then expand relative links."
1753   (flet ((cond-exp (file)
1754           (if (and default-directory
1755                    buffer-file-name
1756                    (not (string= (expand-file-name default-directory)
1757                                  (expand-file-name
1758                                   (file-name-directory buffer-file-name)))))
1759               (expand-file-name file default-directory)
1760             file)))
1761     (if (stringp result)
1762         (format "[[file:%s]]" (cond-exp result))
1763       (when (and (listp result) (= 2 (length result))
1764                  (stringp (car result)) (stringp (cadr result)))
1765         (format "[[file:%s][%s]]" (car result) (cadr result))))))
1766
1767 (defun org-babel-examplize-region (beg end &optional results-switches)
1768   "Comment out region using the inline '==' or ': ' org example quote."
1769   (interactive "*r")
1770   (flet ((chars-between (b e) (string-match "[\\S]" (buffer-substring b e))))
1771     (if (or (chars-between (save-excursion (goto-char beg) (point-at-bol)) beg)
1772             (chars-between end (save-excursion (goto-char end) (point-at-eol))))
1773         (save-excursion
1774           (goto-char beg)
1775           (insert (format "=%s=" (prog1 (buffer-substring beg end)
1776                                    (delete-region beg end)))))
1777       (let ((size (count-lines beg end)))
1778         (save-excursion
1779           (cond ((= size 0))          ; do nothing for an empty result
1780                 ((< size org-babel-min-lines-for-block-output)
1781                  (goto-char beg)
1782                  (dotimes (n size)
1783                    (beginning-of-line 1) (insert ": ") (forward-line 1)))
1784                 (t
1785                  (goto-char beg)
1786                  (insert (if results-switches
1787                              (format "#+begin_example%s\n" results-switches)
1788                            "#+begin_example\n"))
1789                  (if (markerp end) (goto-char end) (forward-char (- end beg)))
1790                  (insert "#+end_example\n"))))))))
1791
1792 (defun org-babel-update-block-body (new-body)
1793   "Update the body of the current code block to NEW-BODY."
1794   (if (not (org-babel-where-is-src-block-head))
1795       (error "not in source block")
1796     (save-match-data
1797       (replace-match (concat (org-babel-trim new-body) "\n") nil t nil 5))
1798     (indent-rigidly (match-beginning 5) (match-end 5) 2)))
1799
1800 (defun org-babel-merge-params (&rest plists)
1801   "Combine all parameter association lists in PLISTS.
1802 Later elements of PLISTS override the values of previous elements.
1803 This takes into account some special considerations for certain
1804 parameters when merging lists."
1805   (let ((results-exclusive-groups
1806          '(("file" "list" "vector" "table" "scalar" "verbatim" "raw" "org"
1807             "html" "latex" "code" "pp" "wrap")
1808            ("replace" "silent" "append" "prepend")
1809            ("output" "value")))
1810         (exports-exclusive-groups
1811          '(("code" "results" "both" "none")))
1812         (variable-index 0)
1813         params results exports tangle noweb cache vars shebang comments padline)
1814     (flet ((e-merge (exclusive-groups &rest result-params)
1815              ;; maintain exclusivity of mutually exclusive parameters
1816              (let (output)
1817                (mapc (lambda (new-params)
1818                        (mapc (lambda (new-param)
1819                                (mapc (lambda (exclusive-group)
1820                                        (when (member new-param exclusive-group)
1821                                          (mapcar (lambda (excluded-param)
1822                                                    (setq output
1823                                                          (delete
1824                                                           excluded-param
1825                                                           output)))
1826                                                  exclusive-group)))
1827                                      exclusive-groups)
1828                                (setq output (org-uniquify
1829                                              (cons new-param output))))
1830                              new-params))
1831                      result-params)
1832                output)))
1833       (mapc
1834        (lambda (plist)
1835          (mapc
1836           (lambda (pair)
1837             (case (car pair)
1838               (:var
1839                (let ((name (if (listp (cdr pair))
1840                                (cadr pair)
1841                              (and (string-match "^\\([^= \f\t\n\r\v]+\\)[ \t]*="
1842                                                 (cdr pair))
1843                                   (intern (match-string 1 (cdr pair)))))))
1844                  (if name
1845                      (setq vars
1846                            (append
1847                             (if (member name (mapcar #'car vars))
1848                                 (delq nil
1849                                       (mapcar
1850                                        (lambda (p)
1851                                          (unless (equal (car p) name) p))
1852                                        vars))
1853                               vars)
1854                             (list (cons name pair))))
1855                    ;; if no name is given and we already have named variables
1856                    ;; then assign to named variables in order
1857                    (if (and vars (nth variable-index vars))
1858                        (prog1 (setf (cddr (nth variable-index vars))
1859                                     (concat (symbol-name
1860                                              (car (nth variable-index vars)))
1861                                             "=" (cdr pair)))
1862                          (incf variable-index))
1863                      (error "variable \"%s\" must be assigned a default value"
1864                             (cdr pair))))))
1865               (:results
1866                (setq results (e-merge results-exclusive-groups
1867                                       results
1868                                       (split-string
1869                                        (let ((r (cdr pair)))
1870                                          (if (stringp r) r (eval r)))))))
1871               (:file
1872                (when (cdr pair)
1873                  (setq results (e-merge results-exclusive-groups
1874                                         results '("file")))
1875                  (unless (or (member "both" exports)
1876                              (member "none" exports)
1877                              (member "code" exports))
1878                    (setq exports (e-merge exports-exclusive-groups
1879                                           exports '("results"))))
1880                  (setq params (cons pair (assq-delete-all (car pair) params)))))
1881               (:exports
1882                (setq exports (e-merge exports-exclusive-groups
1883                                       exports (split-string (cdr pair)))))
1884               (:tangle ;; take the latest -- always overwrite
1885                (setq tangle (or (list (cdr pair)) tangle)))
1886               (:noweb
1887                (setq noweb (e-merge '(("yes" "no" "tangle")) noweb
1888                                     (split-string (or (cdr pair) "")))))
1889               (:cache
1890                (setq cache (e-merge '(("yes" "no")) cache
1891                                     (split-string (or (cdr pair) "")))))
1892               (:padline
1893                (setq padline (e-merge '(("yes" "no")) padline
1894                                       (split-string (or (cdr pair) "")))))
1895               (:shebang ;; take the latest -- always overwrite
1896                (setq shebang (or (list (cdr pair)) shebang)))
1897               (:comments
1898                (setq comments (e-merge '(("yes" "no")) comments
1899                                        (split-string (or (cdr pair) "")))))
1900               (t ;; replace: this covers e.g. :session
1901                (setq params (cons pair (assq-delete-all (car pair) params))))))
1902           plist))
1903        plists))
1904     (setq vars (reverse vars))
1905     (while vars (setq params (cons (cons :var (cddr (pop vars))) params)))
1906     (mapc
1907      (lambda (hd)
1908        (let ((key (intern (concat ":" (symbol-name hd))))
1909              (val (eval hd)))
1910          (setf params (cons (cons key (mapconcat 'identity val " ")) params))))
1911      '(results exports tangle noweb padline cache shebang comments))
1912     params))
1913
1914 (defun org-babel-expand-noweb-references (&optional info parent-buffer)
1915   "Expand Noweb references in the body of the current source code block.
1916
1917 For example the following reference would be replaced with the
1918 body of the source-code block named 'example-block'.
1919
1920 <<example-block>>
1921
1922 Note that any text preceding the <<foo>> construct on a line will
1923 be interposed between the lines of the replacement text.  So for
1924 example if <<foo>> is placed behind a comment, then the entire
1925 replacement text will also be commented.
1926
1927 This function must be called from inside of the buffer containing
1928 the source-code block which holds BODY.
1929
1930 In addition the following syntax can be used to insert the
1931 results of evaluating the source-code block named 'example-block'.
1932
1933 <<example-block()>>
1934
1935 Any optional arguments can be passed to example-block by placing
1936 the arguments inside the parenthesis following the convention
1937 defined by `org-babel-lob'.  For example
1938
1939 <<example-block(a=9)>>
1940
1941 would set the value of argument \"a\" equal to \"9\".  Note that
1942 these arguments are not evaluated in the current source-code
1943 block but are passed literally to the \"example-block\"."
1944   (let* ((parent-buffer (or parent-buffer (current-buffer)))
1945          (info (or info (org-babel-get-src-block-info)))
1946          (lang (nth 0 info))
1947          (body (nth 1 info))
1948          (comment (string= "noweb" (cdr (assoc :comments (nth 2 info)))))
1949          (new-body "") index source-name evaluate prefix blocks-in-buffer)
1950     (flet ((nb-add (text) (setq new-body (concat new-body text)))
1951            (c-wrap (text)
1952                    (with-temp-buffer
1953                      (funcall (intern (concat lang "-mode")))
1954                      (comment-region (point) (progn (insert text) (point)))
1955                      (org-babel-trim (buffer-string))))
1956            (blocks () ;; return the info lists of all blocks in this buffer
1957                    (let (infos)
1958                      (save-restriction
1959                        (widen)
1960                        (org-babel-map-src-blocks nil
1961                          (setq infos (cons (org-babel-get-src-block-info 'light)
1962                                            infos))))
1963                      (reverse infos))))
1964       (with-temp-buffer
1965         (insert body) (goto-char (point-min))
1966         (setq index (point))
1967         (while (and (re-search-forward "<<\\(.+?\\)>>" nil t))
1968           (save-match-data (setf source-name (match-string 1)))
1969           (save-match-data (setq evaluate (string-match "\(.*\)" source-name)))
1970           (save-match-data
1971             (setq prefix
1972                   (buffer-substring (match-beginning 0)
1973                                     (save-excursion
1974                                       (beginning-of-line 1) (point)))))
1975           ;; add interval to new-body (removing noweb reference)
1976           (goto-char (match-beginning 0))
1977           (nb-add (buffer-substring index (point)))
1978           (goto-char (match-end 0))
1979           (setq index (point))
1980           (nb-add
1981            (with-current-buffer parent-buffer
1982              (mapconcat ;; interpose PREFIX between every line
1983               #'identity
1984               (split-string
1985                (if evaluate
1986                    (let ((raw (org-babel-ref-resolve source-name)))
1987                      (if (stringp raw) raw (format "%S" raw)))
1988                  (or
1989                   ;; retrieve from the library of babel
1990                   (nth 2 (assoc (intern source-name)
1991                                 org-babel-library-of-babel))
1992                   ;; return the contents of headlines literally
1993                   (save-excursion
1994                     (when (org-babel-ref-goto-headline-id source-name)
1995                       (org-babel-ref-headline-body)))
1996                   ;; find the expansion of reference in this buffer
1997                   (mapconcat
1998                    (lambda (i)
1999                      (when (string= source-name
2000                                     (or (cdr (assoc :noweb-ref (nth 2 i)))
2001                                         (nth 4 i)))
2002                        (let ((body (org-babel-expand-noweb-references i)))
2003                          (if comment
2004                              ((lambda (cs)
2005                                 (concat (c-wrap (car cs)) "\n"
2006                                         body "\n" (c-wrap (cadr cs))))
2007                               (org-babel-tangle-comment-links i))
2008                            body))))
2009                    (or blocks-in-buffer
2010                        (setq blocks-in-buffer (blocks)))
2011                    "")
2012                   ;; possibly raise an error if named block doesn't exist
2013                   (if (member lang org-babel-noweb-error-langs)
2014                       (error "%s" (concat
2015                                    "<<" source-name ">> "
2016                                    "could not be resolved (see "
2017                                    "`org-babel-noweb-error-langs')"))
2018                     "")))
2019                "[\n\r]") (concat "\n" prefix)))))
2020         (nb-add (buffer-substring index (point-max)))))
2021     new-body))
2022
2023 (defun org-babel-clean-text-properties (text)
2024   "Strip all properties from text return."
2025   (when text
2026     (set-text-properties 0 (length text) nil text) text))
2027
2028 (defun org-babel-strip-protective-commas (body)
2029   "Strip protective commas from bodies of source blocks."
2030   (when body
2031     (replace-regexp-in-string "^,#" "#" body)))
2032
2033 (defun org-babel-script-escape (str &optional force)
2034   "Safely convert tables into elisp lists."
2035   (let (in-single in-double out)
2036     ((lambda (escaped) (condition-case nil (org-babel-read escaped) (error escaped)))
2037      (if (or force
2038              (and (stringp str)
2039                   (> (length str) 2)
2040                   (or (and (string-equal "[" (substring str 0 1))
2041                            (string-equal "]" (substring str -1)))
2042                       (and (string-equal "{" (substring str 0 1))
2043                            (string-equal "}" (substring str -1)))
2044                       (and (string-equal "(" (substring str 0 1))
2045                            (string-equal ")" (substring str -1))))))
2046          (org-babel-read
2047           (concat
2048            "'"
2049            (progn
2050              (mapc
2051               (lambda (ch)
2052                 (setq
2053                  out
2054                  (case ch
2055                    (91 (if (or in-double in-single) ; [
2056                            (cons 91 out)
2057                          (cons 40 out)))
2058                    (93 (if (or in-double in-single) ; ]
2059                            (cons 93 out)
2060                          (cons 41 out)))
2061                    (123 (if (or in-double in-single) ; {
2062                             (cons 123 out)
2063                           (cons 40 out)))
2064                    (125 (if (or in-double in-single) ; }
2065                             (cons 125 out)
2066                           (cons 41 out)))
2067                    (44 (if (or in-double in-single) ; ,
2068                            (cons 44 out) (cons 32 out)))
2069                    (39 (if in-double    ; '
2070                            (cons 39 out)
2071                          (setq in-single (not in-single)) (cons 34 out)))
2072                    (34 (if in-single    ; "
2073                            (append (list 34 32) out)
2074                          (setq in-double (not in-double)) (cons 34 out)))
2075                    (t  (cons ch out)))))
2076               (string-to-list str))
2077              (apply #'string (reverse out)))))
2078        str))))
2079
2080 (defun org-babel-read (cell &optional inhibit-lisp-eval)
2081   "Convert the string value of CELL to a number if appropriate.
2082 Otherwise if cell looks like lisp (meaning it starts with a
2083 \"(\", \"'\", \"`\" or a \"[\") then read it as lisp, otherwise
2084 return it unmodified as a string.  Optional argument NO-LISP-EVAL
2085 inhibits lisp evaluation for situations in which is it not
2086 appropriate."
2087   (if (and (stringp cell) (not (equal cell "")))
2088       (or (org-babel-number-p cell)
2089           (if (and (not inhibit-lisp-eval)
2090                    (member (substring cell 0 1) '("(" "'" "`" "[")))
2091               (eval (read cell))
2092             (if (string= (substring cell 0 1) "\"")
2093                 (read cell)
2094               (progn (set-text-properties 0 (length cell) nil cell) cell))))
2095     cell))
2096
2097 (defun org-babel-number-p (string)
2098   "If STRING represents a number return it's value."
2099   (if (and (string-match "^-?[0-9]*\\.?[0-9]*$" string)
2100            (= (length (substring string (match-beginning 0)
2101                                  (match-end 0)))
2102               (length string)))
2103       (string-to-number string)))
2104
2105 (defun org-babel-import-elisp-from-file (file-name &optional separator)
2106   "Read the results located at FILE-NAME into an elisp table.
2107 If the table is trivial, then return it as a scalar."
2108   (let (result)
2109     (save-window-excursion
2110       (with-temp-buffer
2111         (condition-case nil
2112             (progn
2113               (org-table-import file-name separator)
2114               (delete-file file-name)
2115               (setq result (mapcar (lambda (row)
2116                                      (mapcar #'org-babel-string-read row))
2117                                    (org-table-to-lisp))))
2118           (error nil)))
2119       (if (null (cdr result)) ;; if result is trivial vector, then scalarize it
2120           (if (consp (car result))
2121               (if (null (cdr (car result)))
2122                   (caar result)
2123                 result)
2124             (car result))
2125         result))))
2126
2127 (defun org-babel-string-read (cell)
2128   "Strip nested \"s from around strings."
2129   (org-babel-read (or (and (stringp cell)
2130                            (string-match "\\\"\\(.+\\)\\\"" cell)
2131                            (match-string 1 cell))
2132                       cell)))
2133
2134 (defun org-babel-reverse-string (string)
2135   "Return the reverse of STRING."
2136   (apply 'string (reverse (string-to-list string))))
2137
2138 (defun org-babel-chomp (string &optional regexp)
2139   "Strip trailing spaces and carriage returns from STRING.
2140 Default regexp used is \"[ \f\t\n\r\v]\" but can be
2141 overwritten by specifying a regexp as a second argument."
2142   (let ((regexp (or regexp "[ \f\t\n\r\v]")))
2143     (while (and (> (length string) 0)
2144                 (string-match regexp (substring string -1)))
2145       (setq string (substring string 0 -1)))
2146     string))
2147
2148 (defun org-babel-trim (string &optional regexp)
2149   "Strip leading and trailing spaces and carriage returns from STRING.
2150 Like `org-babel-chomp' only it runs on both the front and back
2151 of the string."
2152   (org-babel-chomp (org-babel-reverse-string
2153                     (org-babel-chomp (org-babel-reverse-string string) regexp))
2154                    regexp))
2155
2156 (defvar org-babel-org-babel-call-process-region-original nil)
2157 (defun org-babel-tramp-handle-call-process-region
2158   (start end program &optional delete buffer display &rest args)
2159   "Use tramp to handle call-process-region.
2160 Fixes a bug in `tramp-handle-call-process-region'."
2161   (if (and (featurep 'tramp) (file-remote-p default-directory))
2162       (let ((tmpfile (tramp-compat-make-temp-file "")))
2163         (write-region start end tmpfile)
2164         (when delete (delete-region start end))
2165         (unwind-protect
2166             ;;  (apply 'call-process program tmpfile buffer display args)
2167             ;; bug in tramp
2168             (apply 'process-file program tmpfile buffer display args)
2169           (delete-file tmpfile)))
2170     ;; org-babel-call-process-region-original is the original emacs
2171     ;; definition. It is in scope from the let binding in
2172     ;; org-babel-execute-src-block
2173     (apply org-babel-call-process-region-original
2174            start end program delete buffer display args)))
2175
2176 (defun org-babel-local-file-name (file)
2177   "Return the local name component of FILE."
2178   (if (file-remote-p file)
2179       (let (localname)
2180         (with-parsed-tramp-file-name file nil
2181           localname))
2182     file))
2183
2184 (defun org-babel-process-file-name (name &optional no-quote-p)
2185   "Prepare NAME to be used in an external process.
2186 If NAME specifies a remote location, the remote portion of the
2187 name is removed, since in that case the process will be executing
2188 remotely. The file name is then processed by
2189 `expand-file-name'. Unless second argument NO-QUOTE-P is non-nil,
2190 the file name is additionally processed by
2191 `shell-quote-argument'"
2192   ((lambda (f) (if no-quote-p f (shell-quote-argument f)))
2193    (expand-file-name (org-babel-local-file-name name))))
2194
2195 (defvar org-babel-temporary-directory)
2196 (unless (or noninteractive (boundp 'org-babel-temporary-directory))
2197   (defvar org-babel-temporary-directory
2198     (or (and (boundp 'org-babel-temporary-directory)
2199              (file-exists-p org-babel-temporary-directory)
2200              org-babel-temporary-directory)
2201         (make-temp-file "babel-" t))
2202     "Directory to hold temporary files created to execute code blocks.
2203 Used by `org-babel-temp-file'.  This directory will be removed on
2204 Emacs shutdown."))
2205
2206 (defun org-babel-temp-file (prefix &optional suffix)
2207   "Create a temporary file in the `org-babel-temporary-directory'.
2208 Passes PREFIX and SUFFIX directly to `make-temp-file' with the
2209 value of `temporary-file-directory' temporarily set to the value
2210 of `org-babel-temporary-directory'."
2211   (if (file-remote-p default-directory)
2212       (make-temp-file
2213        (concat (file-remote-p default-directory)
2214                (expand-file-name
2215                 prefix temporary-file-directory)
2216                nil suffix))
2217     (let ((temporary-file-directory
2218            (or (and (boundp 'org-babel-temporary-directory)
2219                     (file-exists-p org-babel-temporary-directory)
2220                     org-babel-temporary-directory)
2221                temporary-file-directory)))
2222       (make-temp-file prefix nil suffix))))
2223
2224 (defun org-babel-remove-temporary-directory ()
2225   "Remove `org-babel-temporary-directory' on Emacs shutdown."
2226   (when (and (boundp 'org-babel-temporary-directory)
2227              (file-exists-p org-babel-temporary-directory))
2228     ;; taken from `delete-directory' in files.el
2229     (condition-case nil
2230         (progn
2231           (mapc (lambda (file)
2232                   ;; This test is equivalent to
2233                   ;; (and (file-directory-p fn) (not (file-symlink-p fn)))
2234                   ;; but more efficient
2235                   (if (eq t (car (file-attributes file)))
2236                       (delete-directory file)
2237                     (delete-file file)))
2238                 ;; We do not want to delete "." and "..".
2239                 (directory-files org-babel-temporary-directory 'full
2240                                  "^\\([^.]\\|\\.\\([^.]\\|\\..\\)\\).*"))
2241           (delete-directory org-babel-temporary-directory))
2242       (error
2243        (message "Failed to remove temporary Org-babel directory %s"
2244                 (if (boundp 'org-babel-temporary-directory)
2245                     org-babel-temporary-directory
2246                   "[directory not defined]"))))))
2247
2248 (add-hook 'kill-emacs-hook 'org-babel-remove-temporary-directory)
2249
2250 (provide 'ob)
2251
2252
2253
2254 ;;; ob.el ends here