contrib/emacs/git.el

   1 ;;; git.el --- A user interface for git
   2
   3 ;; Copyright (C) 2005, 2006, 2007 Alexandre Julliard <julliard@winehq.org>
   4
   5 ;; Version: 1.0
   6
   7 ;; This program is free software; you can redistribute it and/or
   8 ;; modify it under the terms of the GNU General Public License as
   9 ;; published by the Free Software Foundation; either version 2 of
  10 ;; the License, or (at your option) any later version.
  11 ;;
  12 ;; This program is distributed in the hope that it will be
  13 ;; useful, but WITHOUT ANY WARRANTY; without even the implied
  14 ;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  15 ;; PURPOSE.  See the GNU General Public License for more details.
  16 ;;
  17 ;; You should have received a copy of the GNU General Public
  18 ;; License along with this program; if not, write to the Free
  19 ;; Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20 ;; MA 02111-1307 USA
  21
  22 ;;; Commentary:
  23
  24 ;; This file contains an interface for the git version control
  25 ;; system. It provides easy access to the most frequently used git
  26 ;; commands. The user interface is as far as possible identical to
  27 ;; that of the PCL-CVS mode.
  28 ;;
  29 ;; To install: put this file on the load-path and place the following
  30 ;; in your .emacs file:
  31 ;;
  32 ;;    (require 'git)
  33 ;;
  34 ;; To start: `M-x git-status'
  35 ;;
  36 ;; TODO
  37 ;;  - portability to XEmacs
  38 ;;  - diff against other branch
  39 ;;  - renaming files from the status buffer
  40 ;;  - creating tags
  41 ;;  - fetch/pull
  42 ;;  - switching branches
  43 ;;  - revlist browser
  44 ;;  - git-show-branch browser
  45 ;;  - menus
  46 ;;
  47
  48 (eval-when-compile (require 'cl))
  49 (require 'ewoc)
  50 (require 'log-edit)
  51 (require 'easymenu)
  52
  53
  54 ;;;; Customizations
  55 ;;;; ------------------------------------------------------------
  56
  57 (defgroup git nil
  58   "A user interface for the git versioning system."
  59   :group 'tools)
  60
  61 (defcustom git-committer-name nil
  62   "User name to use for commits.
  63 The default is to fall back to the repository config,
  64 then to `add-log-full-name' and then to `user-full-name'."
  65   :group 'git
  66   :type '(choice (const :tag "Default" nil)
  67                  (string :tag "Name")))
  68
  69 (defcustom git-committer-email nil
  70   "Email address to use for commits.
  71 The default is to fall back to the git repository config,
  72 then to `add-log-mailing-address' and then to `user-mail-address'."
  73   :group 'git
  74   :type '(choice (const :tag "Default" nil)
  75                  (string :tag "Email")))
  76
  77 (defcustom git-commits-coding-system nil
  78   "Default coding system for the log message of git commits."
  79   :group 'git
  80   :type '(choice (const :tag "From repository config" nil)
  81                  (coding-system)))
  82
  83 (defcustom git-append-signed-off-by nil
  84   "Whether to append a Signed-off-by line to the commit message before editing."
  85   :group 'git
  86   :type 'boolean)
  87
  88 (defcustom git-reuse-status-buffer t
  89   "Whether `git-status' should try to reuse an existing buffer
  90 if there is already one that displays the same directory."
  91   :group 'git
  92   :type 'boolean)
  93
  94 (defcustom git-per-dir-ignore-file ".gitignore"
  95   "Name of the per-directory ignore file."
  96   :group 'git
  97   :type 'string)
  98
  99 (defcustom git-show-uptodate nil
 100   "Whether to display up-to-date files."
 101   :group 'git
 102   :type 'boolean)
 103
 104 (defcustom git-show-ignored nil
 105   "Whether to display ignored files."
 106   :group 'git
 107   :type 'boolean)
 108
 109 (defcustom git-show-unknown t
 110   "Whether to display unknown files."
 111   :group 'git
 112   :type 'boolean)
 113
 114
 115 (defface git-status-face
 116   '((((class color) (background light)) (:foreground "purple"))
 117     (((class color) (background dark)) (:foreground "salmon")))
 118   "Git mode face used to highlight added and modified files."
 119   :group 'git)
 120
 121 (defface git-unmerged-face
 122   '((((class color) (background light)) (:foreground "red" :bold t))
 123     (((class color) (background dark)) (:foreground "red" :bold t)))
 124   "Git mode face used to highlight unmerged files."
 125   :group 'git)
 126
 127 (defface git-unknown-face
 128   '((((class color) (background light)) (:foreground "goldenrod" :bold t))
 129     (((class color) (background dark)) (:foreground "goldenrod" :bold t)))
 130   "Git mode face used to highlight unknown files."
 131   :group 'git)
 132
 133 (defface git-uptodate-face
 134   '((((class color) (background light)) (:foreground "grey60"))
 135     (((class color) (background dark)) (:foreground "grey40")))
 136   "Git mode face used to highlight up-to-date files."
 137   :group 'git)
 138
 139 (defface git-ignored-face
 140   '((((class color) (background light)) (:foreground "grey60"))
 141     (((class color) (background dark)) (:foreground "grey40")))
 142   "Git mode face used to highlight ignored files."
 143   :group 'git)
 144
 145 (defface git-mark-face
 146   '((((class color) (background light)) (:foreground "red" :bold t))
 147     (((class color) (background dark)) (:foreground "tomato" :bold t)))
 148   "Git mode face used for the file marks."
 149   :group 'git)
 150
 151 (defface git-header-face
 152   '((((class color) (background light)) (:foreground "blue"))
 153     (((class color) (background dark)) (:foreground "blue")))
 154   "Git mode face used for commit headers."
 155   :group 'git)
 156
 157 (defface git-separator-face
 158   '((((class color) (background light)) (:foreground "brown"))
 159     (((class color) (background dark)) (:foreground "brown")))
 160   "Git mode face used for commit separator."
 161   :group 'git)
 162
 163 (defface git-permission-face
 164   '((((class color) (background light)) (:foreground "green" :bold t))
 165     (((class color) (background dark)) (:foreground "green" :bold t)))
 166   "Git mode face used for permission changes."
 167   :group 'git)
 168
 169
 170 ;;;; Utilities
 171 ;;;; ------------------------------------------------------------
 172
 173 (defconst git-log-msg-separator "--- log message follows this line ---")
 174
 175 (defvar git-log-edit-font-lock-keywords
 176   `(("^\\(Author:\\|Date:\\|Parent:\\|Signed-off-by:\\)\\(.*\\)$"
 177      (1 font-lock-keyword-face)
 178      (2 font-lock-function-name-face))
 179     (,(concat "^\\(" (regexp-quote git-log-msg-separator) "\\)$")
 180      (1 font-lock-comment-face))))
 181
 182 (defun git-get-env-strings (env)
 183   "Build a list of NAME=VALUE strings from a list of environment strings."
 184   (mapcar (lambda (entry) (concat (car entry) "=" (cdr entry))) env))
 185
 186 (defun git-call-process-env (buffer env &rest args)
 187   "Wrapper for call-process that sets environment strings."
 188   (let ((process-environment (append (git-get-env-strings env)
 189                                      process-environment)))
 190     (apply #'call-process "git" nil buffer nil args)))
 191
 192 (defun git-call-process-display-error (&rest args)
 193   "Wrapper for call-process that displays error messages."
 194   (let* ((dir default-directory)
 195          (buffer (get-buffer-create "*Git Command Output*"))
 196          (ok (with-current-buffer buffer
 197                (let ((default-directory dir)
 198                      (buffer-read-only nil))
 199                  (erase-buffer)
 200                  (eq 0 (apply 'call-process "git" nil (list buffer t) nil args))))))
 201     (unless ok (display-message-or-buffer buffer))
 202     ok))
 203
 204 (defun git-call-process-env-string (env &rest args)
 205   "Wrapper for call-process that sets environment strings,
 206 and returns the process output as a string, or nil if the git failed."
 207   (with-temp-buffer
 208     (and (eq 0 (apply #' git-call-process-env t env args))
 209          (buffer-string))))
 210
 211 (defun git-run-process-region (buffer start end program args)
 212   "Run a git process with a buffer region as input."
 213   (let ((output-buffer (current-buffer))
 214         (dir default-directory))
 215     (with-current-buffer buffer
 216       (cd dir)
 217       (apply #'call-process-region start end program
 218              nil (list output-buffer nil) nil args))))
 219
 220 (defun git-run-command-buffer (buffer-name &rest args)
 221   "Run a git command, sending the output to a buffer named BUFFER-NAME."
 222   (let ((dir default-directory)
 223         (buffer (get-buffer-create buffer-name)))
 224     (message "Running git %s..." (car args))
 225     (with-current-buffer buffer
 226       (let ((default-directory dir)
 227             (buffer-read-only nil))
 228         (erase-buffer)
 229         (apply #'git-call-process-env buffer nil args)))
 230     (message "Running git %s...done" (car args))
 231     buffer))
 232
 233 (defun git-run-command-region (buffer start end env &rest args)
 234   "Run a git command with specified buffer region as input."
 235   (unless (eq 0 (if env
 236                     (git-run-process-region
 237                      buffer start end "env"
 238                      (append (git-get-env-strings env) (list "git") args))
 239                   (git-run-process-region
 240                    buffer start end "git" args)))
 241     (error "Failed to run \"git %s\":\n%s" (mapconcat (lambda (x) x) args " ") (buffer-string))))
 242
 243 (defun git-run-hook (hook env &rest args)
 244   "Run a git hook and display its output if any."
 245   (let ((dir default-directory)
 246         (hook-name (expand-file-name (concat ".git/hooks/" hook))))
 247     (or (not (file-executable-p hook-name))
 248         (let (status (buffer (get-buffer-create "*Git Hook Output*")))
 249           (with-current-buffer buffer
 250             (erase-buffer)
 251             (cd dir)
 252             (setq status
 253                   (if env
 254                       (apply #'call-process "env" nil (list buffer t) nil
 255                              (append (git-get-env-strings env) (list hook-name) args))
 256                     (apply #'call-process hook-name nil (list buffer t) nil args))))
 257           (display-message-or-buffer buffer)
 258           (eq 0 status)))))
 259
 260 (defun git-get-string-sha1 (string)
 261   "Read a SHA1 from the specified string."
 262   (and string
 263        (string-match "[0-9a-f]\\{40\\}" string)
 264        (match-string 0 string)))
 265
 266 (defun git-get-committer-name ()
 267   "Return the name to use as GIT_COMMITTER_NAME."
 268   ; copied from log-edit
 269   (or git-committer-name
 270       (git-config "user.name")
 271       (and (boundp 'add-log-full-name) add-log-full-name)
 272       (and (fboundp 'user-full-name) (user-full-name))
 273       (and (boundp 'user-full-name) user-full-name)))
 274
 275 (defun git-get-committer-email ()
 276   "Return the email address to use as GIT_COMMITTER_EMAIL."
 277   ; copied from log-edit
 278   (or git-committer-email
 279       (git-config "user.email")
 280       (and (boundp 'add-log-mailing-address) add-log-mailing-address)
 281       (and (fboundp 'user-mail-address) (user-mail-address))
 282       (and (boundp 'user-mail-address) user-mail-address)))
 283
 284 (defun git-get-commits-coding-system ()
 285   "Return the coding system to use for commits."
 286   (let ((repo-config (git-config "i18n.commitencoding")))
 287     (or git-commits-coding-system
 288         (and repo-config
 289              (fboundp 'locale-charset-to-coding-system)
 290              (locale-charset-to-coding-system repo-config))
 291       'utf-8)))
 292
 293 (defun git-get-logoutput-coding-system ()
 294   "Return the coding system used for git-log output."
 295   (let ((repo-config (or (git-config "i18n.logoutputencoding")
 296                          (git-config "i18n.commitencoding"))))
 297     (or git-commits-coding-system
 298         (and repo-config
 299              (fboundp 'locale-charset-to-coding-system)
 300              (locale-charset-to-coding-system repo-config))
 301       'utf-8)))
 302
 303 (defun git-escape-file-name (name)
 304   "Escape a file name if necessary."
 305   (if (string-match "[\n\t\"\\]" name)
 306       (concat "\""
 307               (mapconcat (lambda (c)
 308                    (case c
 309                      (?\n "\\n")
 310                      (?\t "\\t")
 311                      (?\\ "\\\\")
 312                      (?\" "\\\"")
 313                      (t (char-to-string c))))
 314                  name "")
 315               "\"")
 316     name))
 317
 318 (defun git-success-message (text files)
 319   "Print a success message after having handled FILES."
 320   (let ((n (length files)))
 321     (if (equal n 1)
 322         (message "%s %s" text (car files))
 323       (message "%s %d files" text n))))
 324
 325 (defun git-get-top-dir (dir)
 326   "Retrieve the top-level directory of a git tree."
 327   (let ((cdup (with-output-to-string
 328                 (with-current-buffer standard-output
 329                   (cd dir)
 330                   (unless (eq 0 (call-process "git" nil t nil "rev-parse" "--show-cdup"))
 331                     (error "cannot find top-level git tree for %s." dir))))))
 332     (expand-file-name (concat (file-name-as-directory dir)
 333                               (car (split-string cdup "\n"))))))
 334
 335 ;stolen from pcl-cvs
 336 (defun git-append-to-ignore (file)
 337   "Add a file name to the ignore file in its directory."
 338   (let* ((fullname (expand-file-name file))
 339          (dir (file-name-directory fullname))
 340          (name (file-name-nondirectory fullname))
 341          (ignore-name (expand-file-name git-per-dir-ignore-file dir))
 342          (created (not (file-exists-p ignore-name))))
 343   (save-window-excursion
 344     (set-buffer (find-file-noselect ignore-name))
 345     (goto-char (point-max))
 346     (unless (zerop (current-column)) (insert "\n"))
 347     (insert "/" name "\n")
 348     (sort-lines nil (point-min) (point-max))
 349     (save-buffer))
 350   (when created
 351     (git-call-process-env nil nil "update-index" "--add" "--" (file-relative-name ignore-name)))
 352   (git-update-status-files (list (file-relative-name ignore-name)) 'unknown)))
 353
 354 ; propertize definition for XEmacs, stolen from erc-compat
 355 (eval-when-compile
 356   (unless (fboundp 'propertize)
 357     (defun propertize (string &rest props)
 358       (let ((string (copy-sequence string)))
 359         (while props
 360           (put-text-property 0 (length string) (nth 0 props) (nth 1 props) string)
 361           (setq props (cddr props)))
 362         string))))
 363
 364 ;;;; Wrappers for basic git commands
 365 ;;;; ------------------------------------------------------------
 366
 367 (defun git-rev-parse (rev)
 368   "Parse a revision name and return its SHA1."
 369   (git-get-string-sha1
 370    (git-call-process-env-string nil "rev-parse" rev)))
 371
 372 (defun git-config (key)
 373   "Retrieve the value associated to KEY in the git repository config file."
 374   (let ((str (git-call-process-env-string nil "config" key)))
 375     (and str (car (split-string str "\n")))))
 376
 377 (defun git-symbolic-ref (ref)
 378   "Wrapper for the git-symbolic-ref command."
 379   (let ((str (git-call-process-env-string nil "symbolic-ref" ref)))
 380     (and str (car (split-string str "\n")))))
 381
 382 (defun git-update-ref (ref newval &optional oldval reason)
 383   "Update a reference by calling git-update-ref."
 384   (let ((args (and oldval (list oldval))))
 385     (push newval args)
 386     (push ref args)
 387     (when reason
 388      (push reason args)
 389      (push "-m" args))
 390     (apply 'git-call-process-display-error "update-ref" args)))
 391
 392 (defun git-read-tree (tree &optional index-file)
 393   "Read a tree into the index file."
 394   (apply #'git-call-process-env nil
 395          (if index-file `(("GIT_INDEX_FILE" . ,index-file)) nil)
 396          "read-tree" (if tree (list tree))))
 397
 398 (defun git-write-tree (&optional index-file)
 399   "Call git-write-tree and return the resulting tree SHA1 as a string."
 400   (git-get-string-sha1
 401    (git-call-process-env-string (and index-file `(("GIT_INDEX_FILE" . ,index-file))) "write-tree")))
 402
 403 (defun git-commit-tree (buffer tree head)
 404   "Call git-commit-tree with buffer as input and return the resulting commit SHA1."
 405   (let ((author-name (git-get-committer-name))
 406         (author-email (git-get-committer-email))
 407         (subject "commit (initial): ")
 408         author-date log-start log-end args coding-system-for-write)
 409     (when head
 410       (setq subject "commit: ")
 411       (push "-p" args)
 412       (push head args))
 413     (with-current-buffer buffer
 414       (goto-char (point-min))
 415       (if
 416           (setq log-start (re-search-forward (concat "^" (regexp-quote git-log-msg-separator) "\n") nil t))
 417           (save-restriction
 418             (narrow-to-region (point-min) log-start)
 419             (goto-char (point-min))
 420             (when (re-search-forward "^Author: +\\(.*?\\) *<\\(.*\\)> *$" nil t)
 421               (setq author-name (match-string 1)
 422                     author-email (match-string 2)))
 423             (goto-char (point-min))
 424             (when (re-search-forward "^Date: +\\(.*\\)$" nil t)
 425               (setq author-date (match-string 1)))
 426             (goto-char (point-min))
 427             (while (re-search-forward "^Parent: +\\([0-9a-f]+\\)" nil t)
 428               (unless (string-equal head (match-string 1))
 429                 (setq subject "commit (merge): ")
 430                 (push "-p" args)
 431                 (push (match-string 1) args))))
 432         (setq log-start (point-min)))
 433       (setq log-end (point-max))
 434       (goto-char log-start)
 435       (when (re-search-forward ".*$" nil t)
 436         (setq subject (concat subject (match-string 0))))
 437       (setq coding-system-for-write buffer-file-coding-system))
 438     (let ((commit
 439            (git-get-string-sha1
 440             (with-output-to-string
 441               (with-current-buffer standard-output
 442                 (let ((env `(("GIT_AUTHOR_NAME" . ,author-name)
 443                              ("GIT_AUTHOR_EMAIL" . ,author-email)
 444                              ("GIT_COMMITTER_NAME" . ,(git-get-committer-name))
 445                              ("GIT_COMMITTER_EMAIL" . ,(git-get-committer-email)))))
 446                   (when author-date (push `("GIT_AUTHOR_DATE" . ,author-date) env))
 447                   (apply #'git-run-command-region
 448                          buffer log-start log-end env
 449                          "commit-tree" tree (nreverse args))))))))
 450       (and (git-update-ref "HEAD" commit head subject)
 451            commit))))
 452
 453 (defun git-empty-db-p ()
 454   "Check if the git db is empty (no commit done yet)."
 455   (not (eq 0 (call-process "git" nil nil nil "rev-parse" "--verify" "HEAD"))))
 456
 457 (defun git-get-merge-heads ()
 458   "Retrieve the merge heads from the MERGE_HEAD file if present."
 459   (let (heads)
 460     (when (file-readable-p ".git/MERGE_HEAD")
 461       (with-temp-buffer
 462         (insert-file-contents ".git/MERGE_HEAD" nil nil nil t)
 463         (goto-char (point-min))
 464         (while (re-search-forward "[0-9a-f]\\{40\\}" nil t)
 465           (push (match-string 0) heads))))
 466     (nreverse heads)))
 467
 468 (defun git-get-commit-description (commit)
 469   "Get a one-line description of COMMIT."
 470   (let ((coding-system-for-read (git-get-logoutput-coding-system)))
 471     (let ((descr (git-call-process-env-string nil "log" "--max-count=1" "--pretty=oneline" commit)))
 472       (if (and descr (string-match "\\`\\([0-9a-f]\\{40\\}\\) *\\(.*\\)$" descr))
 473           (concat (substring (match-string 1 descr) 0 10) " - " (match-string 2 descr))
 474         descr))))
 475
 476 ;;;; File info structure
 477 ;;;; ------------------------------------------------------------
 478
 479 ; fileinfo structure stolen from pcl-cvs
 480 (defstruct (git-fileinfo
 481             (:copier nil)
 482             (:constructor git-create-fileinfo (state name &optional old-perm new-perm rename-state orig-name marked))
 483             (:conc-name git-fileinfo->))
 484   marked              ;; t/nil
 485   state               ;; current state
 486   name                ;; file name
 487   old-perm new-perm   ;; permission flags
 488   rename-state        ;; rename or copy state
 489   orig-name           ;; original name for renames or copies
 490   needs-refresh)      ;; whether file needs to be refreshed
 491
 492 (defvar git-status nil)
 493
 494 (defun git-clear-status (status)
 495   "Remove everything from the status list."
 496   (ewoc-filter status (lambda (info) nil)))
 497
 498 (defun git-set-fileinfo-state (info state)
 499   "Set the state of a file info."
 500   (unless (eq (git-fileinfo->state info) state)
 501     (setf (git-fileinfo->state info) state
 502           (git-fileinfo->new-perm info) (git-fileinfo->old-perm info)
 503           (git-fileinfo->rename-state info) nil
 504           (git-fileinfo->orig-name info) nil
 505           (git-fileinfo->needs-refresh info) t)))
 506
 507 (defun git-status-filenames-map (status func files &rest args)
 508   "Apply FUNC to the status files names in the FILES list."
 509   (when files
 510     (setq files (sort files #'string-lessp))
 511     (let ((file (pop files))
 512           (node (ewoc-nth status 0)))
 513       (while (and file node)
 514         (let ((info (ewoc-data node)))
 515           (if (string-lessp (git-fileinfo->name info) file)
 516               (setq node (ewoc-next status node))
 517             (if (string-equal (git-fileinfo->name info) file)
 518                 (apply func info args))
 519             (setq file (pop files))))))))
 520
 521 (defun git-set-filenames-state (status files state)
 522   "Set the state of a list of named files."
 523   (when files
 524     (git-status-filenames-map status #'git-set-fileinfo-state files state)
 525     (unless state  ;; delete files whose state has been set to nil
 526       (ewoc-filter status (lambda (info) (git-fileinfo->state info))))))
 527
 528 (defun git-state-code (code)
 529   "Convert from a string to a added/deleted/modified state."
 530   (case (string-to-char code)
 531     (?M 'modified)
 532     (?? 'unknown)
 533     (?A 'added)
 534     (?D 'deleted)
 535     (?U 'unmerged)
 536     (?T 'modified)
 537     (t nil)))
 538
 539 (defun git-status-code-as-string (code)
 540   "Format a git status code as string."
 541   (case code
 542     ('modified (propertize "Modified" 'face 'git-status-face))
 543     ('unknown  (propertize "Unknown " 'face 'git-unknown-face))
 544     ('added    (propertize "Added   " 'face 'git-status-face))
 545     ('deleted  (propertize "Deleted " 'face 'git-status-face))
 546     ('unmerged (propertize "Unmerged" 'face 'git-unmerged-face))
 547     ('uptodate (propertize "Uptodate" 'face 'git-uptodate-face))
 548     ('ignored  (propertize "Ignored " 'face 'git-ignored-face))
 549     (t "?       ")))
 550
 551 (defun git-file-type-as-string (old-perm new-perm)
 552   "Return a string describing the file type based on its permissions."
 553   (let* ((old-type (lsh (or old-perm 0) -9))
 554          (new-type (lsh (or new-perm 0) -9))
 555          (str (case new-type
 556                 (?\100  ;; file
 557                  (case old-type
 558                    (?\100 nil)
 559                    (?\120 "   (type change symlink -> file)")
 560                    (?\160 "   (type change subproject -> file)")))
 561                  (?\120  ;; symlink
 562                   (case old-type
 563                     (?\100 "   (type change file -> symlink)")
 564                     (?\160 "   (type change subproject -> symlink)")
 565                     (t "   (symlink)")))
 566                   (?\160  ;; subproject
 567                    (case old-type
 568                      (?\100 "   (type change file -> subproject)")
 569                      (?\120 "   (type change symlink -> subproject)")
 570                      (t "   (subproject)")))
 571                   (?\110 nil)  ;; directory (internal, not a real git state)
 572                   (?\000  ;; deleted or unknown
 573                    (case old-type
 574                      (?\120 "   (symlink)")
 575                      (?\160 "   (subproject)")))
 576                   (t (format "   (unknown type %o)" new-type)))))
 577     (cond (str (propertize str 'face 'git-status-face))
 578           ((eq new-type ?\110) "/")
 579           (t ""))))
 580
 581 (defun git-rename-as-string (info)
 582   "Return a string describing the copy or rename associated with INFO, or an empty string if none."
 583   (let ((state (git-fileinfo->rename-state info)))
 584     (if state
 585         (propertize
 586          (concat "   ("
 587                  (if (eq state 'copy) "copied from "
 588                    (if (eq (git-fileinfo->state info) 'added) "renamed from "
 589                      "renamed to "))
 590                  (git-escape-file-name (git-fileinfo->orig-name info))
 591                  ")") 'face 'git-status-face)
 592       "")))
 593
 594 (defun git-permissions-as-string (old-perm new-perm)
 595   "Format a permission change as string."
 596   (propertize
 597    (if (or (not old-perm)
 598            (not new-perm)
 599            (eq 0 (logand ?\111 (logxor old-perm new-perm))))
 600        "  "
 601      (if (eq 0 (logand ?\111 old-perm)) "+x" "-x"))
 602   'face 'git-permission-face))
 603
 604 (defun git-fileinfo-prettyprint (info)
 605   "Pretty-printer for the git-fileinfo structure."
 606   (let ((old-perm (git-fileinfo->old-perm info))
 607         (new-perm (git-fileinfo->new-perm info)))
 608     (insert (concat "   " (if (git-fileinfo->marked info) (propertize "*" 'face 'git-mark-face) " ")
 609                     " " (git-status-code-as-string (git-fileinfo->state info))
 610                     " " (git-permissions-as-string old-perm new-perm)
 611                     "  " (git-escape-file-name (git-fileinfo->name info))
 612                     (git-file-type-as-string old-perm new-perm)
 613                     (git-rename-as-string info)))))
 614
 615 (defun git-insert-info-list (status infolist)
 616   "Insert a list of file infos in the status buffer, replacing existing ones if any."
 617   (setq infolist (sort infolist
 618                        (lambda (info1 info2)
 619                          (string-lessp (git-fileinfo->name info1)
 620                                        (git-fileinfo->name info2)))))
 621   (let ((info (pop infolist))
 622         (node (ewoc-nth status 0)))
 623     (while info
 624       (cond ((not node)
 625              (setq node (ewoc-enter-last status info))
 626              (setq info (pop infolist)))
 627             ((string-lessp (git-fileinfo->name (ewoc-data node))
 628                            (git-fileinfo->name info))
 629              (setq node (ewoc-next status node)))
 630             ((string-equal (git-fileinfo->name (ewoc-data node))
 631                            (git-fileinfo->name info))
 632               ;; preserve the marked flag
 633               (setf (git-fileinfo->marked info) (git-fileinfo->marked (ewoc-data node)))
 634               (setf (git-fileinfo->needs-refresh info) t)
 635               (setf (ewoc-data node) info)
 636               (setq info (pop infolist)))
 637             (t
 638              (setq node (ewoc-enter-before status node info))
 639              (setq info (pop infolist)))))))
 640
 641 (defun git-run-diff-index (status files)
 642   "Run git-diff-index on FILES and parse the results into STATUS.
 643 Return the list of files that haven't been handled."
 644   (let ((remaining (copy-sequence files))
 645         infolist)
 646     (with-temp-buffer
 647       (apply #'git-call-process-env t nil "diff-index" "-z" "-M" "HEAD" "--" files)
 648       (goto-char (point-min))
 649       (while (re-search-forward
 650               ":\\([0-7]\\{6\\}\\) \\([0-7]\\{6\\}\\) [0-9a-f]\\{40\\} [0-9a-f]\\{40\\} \\(\\([ADMUT]\\)\0\\([^\0]+\\)\\|\\([CR]\\)[0-9]*\0\\([^\0]+\\)\0\\([^\0]+\\)\\)\0"
 651               nil t 1)
 652         (let ((old-perm (string-to-number (match-string 1) 8))
 653               (new-perm (string-to-number (match-string 2) 8))
 654               (state (or (match-string 4) (match-string 6)))
 655               (name (or (match-string 5) (match-string 7)))
 656               (new-name (match-string 8)))
 657           (if new-name  ; copy or rename
 658               (if (eq ?C (string-to-char state))
 659                   (push (git-create-fileinfo 'added new-name old-perm new-perm 'copy name) infolist)
 660                 (push (git-create-fileinfo 'deleted name 0 0 'rename new-name) infolist)
 661                 (push (git-create-fileinfo 'added new-name old-perm new-perm 'rename name) infolist))
 662             (push (git-create-fileinfo (git-state-code state) name old-perm new-perm) infolist))
 663           (setq remaining (delete name remaining))
 664           (when new-name (setq remaining (delete new-name remaining))))))
 665     (git-insert-info-list status infolist)
 666     remaining))
 667
 668 (defun git-find-status-file (status file)
 669   "Find a given file in the status ewoc and return its node."
 670   (let ((node (ewoc-nth status 0)))
 671     (while (and node (not (string= file (git-fileinfo->name (ewoc-data node)))))
 672       (setq node (ewoc-next status node)))
 673     node))
 674
 675 (defun git-run-ls-files (status files default-state &rest options)
 676   "Run git-ls-files on FILES and parse the results into STATUS.
 677 Return the list of files that haven't been handled."
 678   (let (infolist)
 679     (with-temp-buffer
 680       (apply #'git-call-process-env t nil "ls-files" "-z" (append options (list "--") files))
 681       (goto-char (point-min))
 682       (while (re-search-forward "\\([^\0]*?\\)\\(/?\\)\0" nil t 1)
 683         (let ((name (match-string 1)))
 684           (push (git-create-fileinfo default-state name 0
 685                                      (if (string-equal "/" (match-string 2)) (lsh ?\110 9) 0))
 686                 infolist)
 687           (setq files (delete name files)))))
 688     (git-insert-info-list status infolist)
 689     files))
 690
 691 (defun git-run-ls-files-cached (status files default-state)
 692   "Run git-ls-files -c on FILES and parse the results into STATUS.
 693 Return the list of files that haven't been handled."
 694   (let ((remaining (copy-sequence files))
 695         infolist)
 696     (with-temp-buffer
 697       (apply #'git-call-process-env t nil "ls-files" "-z" "-s" "-c" "--" files)
 698       (goto-char (point-min))
 699       (while (re-search-forward "\\([0-7]\\{6\\}\\) [0-9a-f]\\{40\\} 0\t\\([^\0]+\\)\0" nil t)
 700         (let* ((new-perm (string-to-number (match-string 1) 8))
 701                (old-perm (if (eq default-state 'added) 0 new-perm))
 702                (name (match-string 2)))
 703           (push (git-create-fileinfo default-state name old-perm new-perm) infolist)
 704           (setq remaining (delete name remaining)))))
 705     (git-insert-info-list status infolist)
 706     remaining))
 707
 708 (defun git-run-ls-unmerged (status files)
 709   "Run git-ls-files -u on FILES and parse the results into STATUS."
 710   (with-temp-buffer
 711     (apply #'git-call-process-env t nil "ls-files" "-z" "-u" "--" files)
 712     (goto-char (point-min))
 713     (let (unmerged-files)
 714       (while (re-search-forward "[0-7]\\{6\\} [0-9a-f]\\{40\\} [123]\t\\([^\0]+\\)\0" nil t)
 715         (push (match-string 1) unmerged-files))
 716       (git-set-filenames-state status unmerged-files 'unmerged))))
 717
 718 (defun git-get-exclude-files ()
 719   "Get the list of exclude files to pass to git-ls-files."
 720   (let (files
 721         (config (git-config "core.excludesfile")))
 722     (when (file-readable-p ".git/info/exclude")
 723       (push ".git/info/exclude" files))
 724     (when (and config (file-readable-p config))
 725       (push config files))
 726     files))
 727
 728 (defun git-run-ls-files-with-excludes (status files default-state &rest options)
 729   "Run git-ls-files on FILES with appropriate --exclude-from options."
 730   (let ((exclude-files (git-get-exclude-files)))
 731     (apply #'git-run-ls-files status files default-state "--directory" "--no-empty-directory"
 732            (concat "--exclude-per-directory=" git-per-dir-ignore-file)
 733            (append options (mapcar (lambda (f) (concat "--exclude-from=" f)) exclude-files)))))
 734
 735 (defun git-update-status-files (files &optional default-state)
 736   "Update the status of FILES from the index."
 737   (unless git-status (error "Not in git-status buffer."))
 738   (when (or git-show-uptodate files)
 739     (git-run-ls-files-cached git-status files 'uptodate))
 740   (let* ((remaining-files
 741           (if (git-empty-db-p) ; we need some special handling for an empty db
 742               (git-run-ls-files-cached git-status files 'added)
 743             (git-run-diff-index git-status files))))
 744     (git-run-ls-unmerged git-status files)
 745     (when (or remaining-files (and git-show-unknown (not files)))
 746       (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'unknown "-o")))
 747     (when (or remaining-files (and git-show-ignored (not files)))
 748       (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'ignored "-o" "-i")))
 749     (git-set-filenames-state git-status remaining-files default-state)
 750     (git-refresh-files)
 751     (git-refresh-ewoc-hf git-status)))
 752
 753 (defun git-mark-files (status files)
 754   "Mark all the specified FILES, and unmark the others."
 755   (setq files (sort files #'string-lessp))
 756   (let ((file (and files (pop files)))
 757         (node (ewoc-nth status 0)))
 758     (while node
 759       (let ((info (ewoc-data node)))
 760         (if (and file (string-equal (git-fileinfo->name info) file))
 761             (progn
 762               (unless (git-fileinfo->marked info)
 763                 (setf (git-fileinfo->marked info) t)
 764                 (setf (git-fileinfo->needs-refresh info) t))
 765               (setq file (pop files))
 766               (setq node (ewoc-next status node)))
 767           (when (git-fileinfo->marked info)
 768             (setf (git-fileinfo->marked info) nil)
 769             (setf (git-fileinfo->needs-refresh info) t))
 770           (if (and file (string-lessp file (git-fileinfo->name info)))
 771               (setq file (pop files))
 772             (setq node (ewoc-next status node))))))))
 773
 774 (defun git-marked-files ()
 775   "Return a list of all marked files, or if none a list containing just the file at cursor position."
 776   (unless git-status (error "Not in git-status buffer."))
 777   (or (ewoc-collect git-status (lambda (info) (git-fileinfo->marked info)))
 778       (list (ewoc-data (ewoc-locate git-status)))))
 779
 780 (defun git-marked-files-state (&rest states)
 781   "Return marked files that are in the specified states."
 782   (let ((files (git-marked-files))
 783         result)
 784     (dolist (info files)
 785       (when (memq (git-fileinfo->state info) states)
 786         (push info result)))
 787     result))
 788
 789 (defun git-refresh-files ()
 790   "Refresh all files that need it and clear the needs-refresh flag."
 791   (unless git-status (error "Not in git-status buffer."))
 792   (ewoc-map
 793    (lambda (info)
 794      (let ((refresh (git-fileinfo->needs-refresh info)))
 795        (setf (git-fileinfo->needs-refresh info) nil)
 796        refresh))
 797    git-status)
 798   ; move back to goal column
 799   (when goal-column (move-to-column goal-column)))
 800
 801 (defun git-refresh-ewoc-hf (status)
 802   "Refresh the ewoc header and footer."
 803   (let ((branch (git-symbolic-ref "HEAD"))
 804         (head (if (git-empty-db-p) "Nothing committed yet"
 805                 (git-get-commit-description "HEAD")))
 806         (merge-heads (git-get-merge-heads)))
 807     (ewoc-set-hf status
 808                  (format "Directory:  %s\nBranch:     %s\nHead:       %s%s\n"
 809                          default-directory
 810                          (if branch
 811                              (if (string-match "^refs/heads/" branch)
 812                                  (substring branch (match-end 0))
 813                                branch)
 814                            "none (detached HEAD)")
 815                          head
 816                          (if merge-heads
 817                              (concat "\nMerging:    "
 818                                      (mapconcat (lambda (str) (git-get-commit-description str)) merge-heads "\n            "))
 819                            ""))
 820                  (if (ewoc-nth status 0) "" "    No changes."))))
 821
 822 (defun git-get-filenames (files)
 823   (mapcar (lambda (info) (git-fileinfo->name info)) files))
 824
 825 (defun git-update-index (index-file files)
 826   "Run git-update-index on a list of files."
 827   (let ((env (and index-file `(("GIT_INDEX_FILE" . ,index-file))))
 828         added deleted modified)
 829     (dolist (info files)
 830       (case (git-fileinfo->state info)
 831         ('added (push info added))
 832         ('deleted (push info deleted))
 833         ('modified (push info modified))))
 834     (when added
 835       (apply #'git-call-process-env nil env "update-index" "--add" "--" (git-get-filenames added)))
 836     (when deleted
 837       (apply #'git-call-process-env nil env "update-index" "--remove" "--" (git-get-filenames deleted)))
 838     (when modified
 839       (apply #'git-call-process-env nil env "update-index" "--" (git-get-filenames modified)))))
 840
 841 (defun git-run-pre-commit-hook ()
 842   "Run the pre-commit hook if any."
 843   (unless git-status (error "Not in git-status buffer."))
 844   (let ((files (git-marked-files-state 'added 'deleted 'modified)))
 845     (or (not files)
 846         (not (file-executable-p ".git/hooks/pre-commit"))
 847         (let ((index-file (make-temp-file "gitidx")))
 848           (unwind-protect
 849             (let ((head-tree (unless (git-empty-db-p) (git-rev-parse "HEAD^{tree}"))))
 850               (git-read-tree head-tree index-file)
 851               (git-update-index index-file files)
 852               (git-run-hook "pre-commit" `(("GIT_INDEX_FILE" . ,index-file))))
 853           (delete-file index-file))))))
 854
 855 (defun git-do-commit ()
 856   "Perform the actual commit using the current buffer as log message."
 857   (interactive)
 858   (let ((buffer (current-buffer))
 859         (index-file (make-temp-file "gitidx")))
 860     (with-current-buffer log-edit-parent-buffer
 861       (if (git-marked-files-state 'unmerged)
 862           (message "You cannot commit unmerged files, resolve them first.")
 863         (unwind-protect
 864             (let ((files (git-marked-files-state 'added 'deleted 'modified))
 865                   head head-tree)
 866               (unless (git-empty-db-p)
 867                 (setq head (git-rev-parse "HEAD")
 868                       head-tree (git-rev-parse "HEAD^{tree}")))
 869               (if files
 870                   (progn
 871                     (message "Running git commit...")
 872                     (git-read-tree head-tree index-file)
 873                     (git-update-index nil files)         ;update both the default index
 874                     (git-update-index index-file files)  ;and the temporary one
 875                     (let ((tree (git-write-tree index-file)))
 876                       (if (or (not (string-equal tree head-tree))
 877                               (yes-or-no-p "The tree was not modified, do you really want to perform an empty commit? "))
 878                           (let ((commit (git-commit-tree buffer tree head)))
 879                             (when commit
 880                               (condition-case nil (delete-file ".git/MERGE_HEAD") (error nil))
 881                               (condition-case nil (delete-file ".git/MERGE_MSG") (error nil))
 882                               (with-current-buffer buffer (erase-buffer))
 883                               (git-update-status-files (git-get-filenames files) 'uptodate)
 884                               (git-call-process-env nil nil "rerere")
 885                               (git-call-process-env nil nil "gc" "--auto")
 886                               (git-refresh-files)
 887                               (git-refresh-ewoc-hf git-status)
 888                               (message "Committed %s." commit)
 889                               (git-run-hook "post-commit" nil)))
 890                         (message "Commit aborted."))))
 891                 (message "No files to commit.")))
 892           (delete-file index-file))))))
 893
 894
 895 ;;;; Interactive functions
 896 ;;;; ------------------------------------------------------------
 897
 898 (defun git-mark-file ()
 899   "Mark the file that the cursor is on and move to the next one."
 900   (interactive)
 901   (unless git-status (error "Not in git-status buffer."))
 902   (let* ((pos (ewoc-locate git-status))
 903          (info (ewoc-data pos)))
 904     (setf (git-fileinfo->marked info) t)
 905     (ewoc-invalidate git-status pos)
 906     (ewoc-goto-next git-status 1)))
 907
 908 (defun git-unmark-file ()
 909   "Unmark the file that the cursor is on and move to the next one."
 910   (interactive)
 911   (unless git-status (error "Not in git-status buffer."))
 912   (let* ((pos (ewoc-locate git-status))
 913          (info (ewoc-data pos)))
 914     (setf (git-fileinfo->marked info) nil)
 915     (ewoc-invalidate git-status pos)
 916     (ewoc-goto-next git-status 1)))
 917
 918 (defun git-unmark-file-up ()
 919   "Unmark the file that the cursor is on and move to the previous one."
 920   (interactive)
 921   (unless git-status (error "Not in git-status buffer."))
 922   (let* ((pos (ewoc-locate git-status))
 923          (info (ewoc-data pos)))
 924     (setf (git-fileinfo->marked info) nil)
 925     (ewoc-invalidate git-status pos)
 926     (ewoc-goto-prev git-status 1)))
 927
 928 (defun git-mark-all ()
 929   "Mark all files."
 930   (interactive)
 931   (unless git-status (error "Not in git-status buffer."))
 932   (ewoc-map (lambda (info) (unless (git-fileinfo->marked info)
 933                              (setf (git-fileinfo->marked info) t))) git-status)
 934   ; move back to goal column after invalidate
 935   (when goal-column (move-to-column goal-column)))
 936
 937 (defun git-unmark-all ()
 938   "Unmark all files."
 939   (interactive)
 940   (unless git-status (error "Not in git-status buffer."))
 941   (ewoc-map (lambda (info) (when (git-fileinfo->marked info)
 942                              (setf (git-fileinfo->marked info) nil)
 943                              t)) git-status)
 944   ; move back to goal column after invalidate
 945   (when goal-column (move-to-column goal-column)))
 946
 947 (defun git-toggle-all-marks ()
 948   "Toggle all file marks."
 949   (interactive)
 950   (unless git-status (error "Not in git-status buffer."))
 951   (ewoc-map (lambda (info) (setf (git-fileinfo->marked info) (not (git-fileinfo->marked info))) t) git-status)
 952   ; move back to goal column after invalidate
 953   (when goal-column (move-to-column goal-column)))
 954
 955 (defun git-next-file (&optional n)
 956   "Move the selection down N files."
 957   (interactive "p")
 958   (unless git-status (error "Not in git-status buffer."))
 959   (ewoc-goto-next git-status n))
 960
 961 (defun git-prev-file (&optional n)
 962   "Move the selection up N files."
 963   (interactive "p")
 964   (unless git-status (error "Not in git-status buffer."))
 965   (ewoc-goto-prev git-status n))
 966
 967 (defun git-next-unmerged-file (&optional n)
 968   "Move the selection down N unmerged files."
 969   (interactive "p")
 970   (unless git-status (error "Not in git-status buffer."))
 971   (let* ((last (ewoc-locate git-status))
 972          (node (ewoc-next git-status last)))
 973     (while (and node (> n 0))
 974       (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 975         (setq n (1- n))
 976         (setq last node))
 977       (setq node (ewoc-next git-status node)))
 978     (ewoc-goto-node git-status last)))
 979
 980 (defun git-prev-unmerged-file (&optional n)
 981   "Move the selection up N unmerged files."
 982   (interactive "p")
 983   (unless git-status (error "Not in git-status buffer."))
 984   (let* ((last (ewoc-locate git-status))
 985          (node (ewoc-prev git-status last)))
 986     (while (and node (> n 0))
 987       (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 988         (setq n (1- n))
 989         (setq last node))
 990       (setq node (ewoc-prev git-status node)))
 991     (ewoc-goto-node git-status last)))
 992
 993 (defun git-add-file ()
 994   "Add marked file(s) to the index cache."
 995   (interactive)
 996   (let ((files (git-get-filenames (git-marked-files-state 'unknown 'ignored))))
 997     ;; FIXME: add support for directories
 998     (unless files
 999       (push (file-relative-name (read-file-name "File to add: " nil nil t)) files))
1000     (when (apply 'git-call-process-display-error "update-index" "--add" "--" files)
1001       (git-update-status-files files 'uptodate)
1002       (git-success-message "Added" files))))
1003
1004 (defun git-ignore-file ()
1005   "Add marked file(s) to the ignore list."
1006   (interactive)
1007   (let ((files (git-get-filenames (git-marked-files-state 'unknown))))
1008     (unless files
1009       (push (file-relative-name (read-file-name "File to ignore: " nil nil t)) files))
1010     (dolist (f files) (git-append-to-ignore f))
1011     (git-update-status-files files 'ignored)
1012     (git-success-message "Ignored" files)))
1013
1014 (defun git-remove-file ()
1015   "Remove the marked file(s)."
1016   (interactive)
1017   (let ((files (git-get-filenames (git-marked-files-state 'added 'modified 'unknown 'uptodate 'ignored))))
1018     (unless files
1019       (push (file-relative-name (read-file-name "File to remove: " nil nil t)) files))
1020     (if (yes-or-no-p
1021          (format "Remove %d file%s? " (length files) (if (> (length files) 1) "s" "")))
1022         (progn
1023           (dolist (name files)
1024             (ignore-errors
1025               (if (file-directory-p name)
1026                   (delete-directory name)
1027                 (delete-file name))))
1028           (when (apply 'git-call-process-display-error "update-index" "--remove" "--" files)
1029             (git-update-status-files files nil)
1030             (git-success-message "Removed" files)))
1031       (message "Aborting"))))
1032
1033 (defun git-revert-file ()
1034   "Revert changes to the marked file(s)."
1035   (interactive)
1036   (let ((files (git-marked-files-state 'added 'deleted 'modified 'unmerged))
1037         added modified)
1038     (when (and files
1039                (yes-or-no-p
1040                 (format "Revert %d file%s? " (length files) (if (> (length files) 1) "s" ""))))
1041       (dolist (info files)
1042         (case (git-fileinfo->state info)
1043           ('added (push (git-fileinfo->name info) added))
1044           ('deleted (push (git-fileinfo->name info) modified))
1045           ('unmerged (push (git-fileinfo->name info) modified))
1046           ('modified (push (git-fileinfo->name info) modified))))
1047       ;; check if a buffer contains one of the files and isn't saved
1048       (dolist (file modified)
1049         (let ((buffer (get-file-buffer file)))
1050           (when (and buffer (buffer-modified-p buffer))
1051             (error "Buffer %s is modified. Please kill or save modified buffers before reverting." (buffer-name buffer)))))
1052       (let ((ok (and
1053                  (or (not added)
1054                      (apply 'git-call-process-display-error "update-index" "--force-remove" "--" added))
1055                  (or (not modified)
1056                      (apply 'git-call-process-display-error "checkout" "HEAD" modified)))))
1057         (git-update-status-files (append added modified) 'uptodate)
1058         (when ok
1059           (dolist (file modified)
1060             (let ((buffer (get-file-buffer file)))
1061               (when buffer (with-current-buffer buffer (revert-buffer t t t)))))
1062           (git-success-message "Reverted" (git-get-filenames files)))))))
1063
1064 (defun git-resolve-file ()
1065   "Resolve conflicts in marked file(s)."
1066   (interactive)
1067   (let ((files (git-get-filenames (git-marked-files-state 'unmerged))))
1068     (when files
1069       (when (apply 'git-call-process-display-error "update-index" "--" files)
1070         (git-update-status-files files 'uptodate)
1071         (git-success-message "Resolved" files)))))
1072
1073 (defun git-remove-handled ()
1074   "Remove handled files from the status list."
1075   (interactive)
1076   (ewoc-filter git-status
1077                (lambda (info)
1078                  (case (git-fileinfo->state info)
1079                    ('ignored git-show-ignored)
1080                    ('uptodate git-show-uptodate)
1081                    ('unknown git-show-unknown)
1082                    (t t))))
1083   (unless (ewoc-nth git-status 0)  ; refresh header if list is empty
1084     (git-refresh-ewoc-hf git-status)))
1085
1086 (defun git-toggle-show-uptodate ()
1087   "Toogle the option for showing up-to-date files."
1088   (interactive)
1089   (if (setq git-show-uptodate (not git-show-uptodate))
1090       (git-refresh-status)
1091     (git-remove-handled)))
1092
1093 (defun git-toggle-show-ignored ()
1094   "Toogle the option for showing ignored files."
1095   (interactive)
1096   (if (setq git-show-ignored (not git-show-ignored))
1097       (progn
1098         (message "Inserting ignored files...")
1099         (git-run-ls-files-with-excludes git-status nil 'ignored "-o" "-i")
1100         (git-refresh-files)
1101         (git-refresh-ewoc-hf git-status)
1102         (message "Inserting ignored files...done"))
1103     (git-remove-handled)))
1104
1105 (defun git-toggle-show-unknown ()
1106   "Toogle the option for showing unknown files."
1107   (interactive)
1108   (if (setq git-show-unknown (not git-show-unknown))
1109       (progn
1110         (message "Inserting unknown files...")
1111         (git-run-ls-files-with-excludes git-status nil 'unknown "-o")
1112         (git-refresh-files)
1113         (git-refresh-ewoc-hf git-status)
1114         (message "Inserting unknown files...done"))
1115     (git-remove-handled)))
1116
1117 (defun git-expand-directory (info)
1118   "Expand the directory represented by INFO to list its files."
1119   (when (eq (lsh (git-fileinfo->new-perm info) -9) ?\110)
1120     (let ((dir (git-fileinfo->name info)))
1121       (git-set-filenames-state git-status (list dir) nil)
1122       (git-run-ls-files-with-excludes git-status (list (concat dir "/")) 'unknown "-o")
1123       (git-refresh-files)
1124       (git-refresh-ewoc-hf git-status)
1125       t)))
1126
1127 (defun git-setup-diff-buffer (buffer)
1128   "Setup a buffer for displaying a diff."
1129   (let ((dir default-directory))
1130     (with-current-buffer buffer
1131       (diff-mode)
1132       (goto-char (point-min))
1133       (setq default-directory dir)
1134       (setq buffer-read-only t)))
1135   (display-buffer buffer)
1136   ; shrink window only if it displays the status buffer
1137   (when (eq (window-buffer) (current-buffer))
1138     (shrink-window-if-larger-than-buffer)))
1139
1140 (defun git-diff-file ()
1141   "Diff the marked file(s) against HEAD."
1142   (interactive)
1143   (let ((files (git-marked-files)))
1144     (git-setup-diff-buffer
1145      (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M" "HEAD" "--" (git-get-filenames files)))))
1146
1147 (defun git-diff-file-merge-head (arg)
1148   "Diff the marked file(s) against the first merge head (or the nth one with a numeric prefix)."
1149   (interactive "p")
1150   (let ((files (git-marked-files))
1151         (merge-heads (git-get-merge-heads)))
1152     (unless merge-heads (error "No merge in progress"))
1153     (git-setup-diff-buffer
1154      (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M"
1155             (or (nth (1- arg) merge-heads) "HEAD") "--" (git-get-filenames files)))))
1156
1157 (defun git-diff-unmerged-file (stage)
1158   "Diff the marked unmerged file(s) against the specified stage."
1159   (let ((files (git-marked-files)))
1160     (git-setup-diff-buffer
1161      (apply #'git-run-command-buffer "*git-diff*" "diff-files" "-p" stage "--" (git-get-filenames files)))))
1162
1163 (defun git-diff-file-base ()
1164   "Diff the marked unmerged file(s) against the common base file."
1165   (interactive)
1166   (git-diff-unmerged-file "-1"))
1167
1168 (defun git-diff-file-mine ()
1169   "Diff the marked unmerged file(s) against my pre-merge version."
1170   (interactive)
1171   (git-diff-unmerged-file "-2"))
1172
1173 (defun git-diff-file-other ()
1174   "Diff the marked unmerged file(s) against the other's pre-merge version."
1175   (interactive)
1176   (git-diff-unmerged-file "-3"))
1177
1178 (defun git-diff-file-combined ()
1179   "Do a combined diff of the marked unmerged file(s)."
1180   (interactive)
1181   (git-diff-unmerged-file "-c"))
1182
1183 (defun git-diff-file-idiff ()
1184   "Perform an interactive diff on the current file."
1185   (interactive)
1186   (let ((files (git-marked-files-state 'added 'deleted 'modified)))
1187     (unless (eq 1 (length files))
1188       (error "Cannot perform an interactive diff on multiple files."))
1189     (let* ((filename (car (git-get-filenames files)))
1190            (buff1 (find-file-noselect filename))
1191            (buff2 (git-run-command-buffer (concat filename ".~HEAD~") "cat-file" "blob" (concat "HEAD:" filename))))
1192       (ediff-buffers buff1 buff2))))
1193
1194 (defun git-log-file ()
1195   "Display a log of changes to the marked file(s)."
1196   (interactive)
1197   (let* ((files (git-marked-files))
1198          (coding-system-for-read git-commits-coding-system)
1199          (buffer (apply #'git-run-command-buffer "*git-log*" "rev-list" "--pretty" "HEAD" "--" (git-get-filenames files))))
1200     (with-current-buffer buffer
1201       ; (git-log-mode)  FIXME: implement log mode
1202       (goto-char (point-min))
1203       (setq buffer-read-only t))
1204     (display-buffer buffer)))
1205
1206 (defun git-log-edit-files ()
1207   "Return a list of marked files for use in the log-edit buffer."
1208   (with-current-buffer log-edit-parent-buffer
1209     (git-get-filenames (git-marked-files-state 'added 'deleted 'modified))))
1210
1211 (defun git-log-edit-diff ()
1212   "Run a diff of the current files being committed from a log-edit buffer."
1213   (with-current-buffer log-edit-parent-buffer
1214     (git-diff-file)))
1215
1216 (defun git-append-sign-off (name email)
1217   "Append a Signed-off-by entry to the current buffer, avoiding duplicates."
1218   (let ((sign-off (format "Signed-off-by: %s <%s>" name email))
1219         (case-fold-search t))
1220     (goto-char (point-min))
1221     (unless (re-search-forward (concat "^" (regexp-quote sign-off)) nil t)
1222       (goto-char (point-min))
1223       (unless (re-search-forward "^Signed-off-by: " nil t)
1224         (setq sign-off (concat "\n" sign-off)))
1225       (goto-char (point-max))
1226       (insert sign-off "\n"))))
1227
1228 (defun git-setup-log-buffer (buffer &optional author-name author-email subject date msg)
1229   "Setup the log buffer for a commit."
1230   (unless git-status (error "Not in git-status buffer."))
1231   (let ((merge-heads (git-get-merge-heads))
1232         (dir default-directory)
1233         (committer-name (git-get-committer-name))
1234         (committer-email (git-get-committer-email))
1235         (sign-off git-append-signed-off-by))
1236     (with-current-buffer buffer
1237       (cd dir)
1238       (erase-buffer)
1239       (insert
1240        (propertize
1241         (format "Author: %s <%s>\n%s%s"
1242                 (or author-name committer-name)
1243                 (or author-email committer-email)
1244                 (if date (format "Date: %s\n" date) "")
1245                 (if merge-heads
1246                     (format "Parent: %s\n%s\n"
1247                             (git-rev-parse "HEAD")
1248                             (mapconcat (lambda (str) (concat "Parent: " str)) merge-heads "\n"))
1249                   ""))
1250         'face 'git-header-face)
1251        (propertize git-log-msg-separator 'face 'git-separator-face)
1252        "\n")
1253       (when subject (insert subject "\n\n"))
1254       (cond (msg (insert msg "\n"))
1255             ((file-readable-p ".git/rebase/msg")
1256              (insert-file-contents ".git/rebase/msg"))
1257             ((file-readable-p ".git/MERGE_MSG")
1258              (insert-file-contents ".git/MERGE_MSG")))
1259       ; delete empty lines at end
1260       (goto-char (point-min))
1261       (when (re-search-forward "\n+\\'" nil t)
1262         (replace-match "\n" t t))
1263       (when sign-off (git-append-sign-off committer-name committer-email)))
1264     buffer))
1265
1266 (defun git-commit-file ()
1267   "Commit the marked file(s), asking for a commit message."
1268   (interactive)
1269   (unless git-status (error "Not in git-status buffer."))
1270   (when (git-run-pre-commit-hook)
1271     (let ((buffer (get-buffer-create "*git-commit*"))
1272           (coding-system (git-get-commits-coding-system))
1273           author-name author-email subject date)
1274       (when (eq 0 (buffer-size buffer))
1275         (when (file-readable-p ".git/rebase/info")
1276           (with-temp-buffer
1277             (insert-file-contents ".git/rebase/info")
1278             (goto-char (point-min))
1279             (when (re-search-forward "^Author: \\(.*\\)\nEmail: \\(.*\\)$" nil t)
1280               (setq author-name (match-string 1))
1281               (setq author-email (match-string 2)))
1282             (goto-char (point-min))
1283             (when (re-search-forward "^Subject: \\(.*\\)$" nil t)
1284               (setq subject (match-string 1)))
1285             (goto-char (point-min))
1286             (when (re-search-forward "^Date: \\(.*\\)$" nil t)
1287               (setq date (match-string 1)))))
1288         (git-setup-log-buffer buffer author-name author-email subject date))
1289       (if (boundp 'log-edit-diff-function)
1290           (log-edit 'git-do-commit nil '((log-edit-listfun . git-log-edit-files)
1291                                          (log-edit-diff-function . git-log-edit-diff)) buffer)
1292         (log-edit 'git-do-commit nil 'git-log-edit-files buffer))
1293       (setq font-lock-keywords (font-lock-compile-keywords git-log-edit-font-lock-keywords))
1294       (setq buffer-file-coding-system coding-system)
1295       (re-search-forward (regexp-quote (concat git-log-msg-separator "\n")) nil t))))
1296
1297 (defun git-setup-commit-buffer (commit)
1298   "Setup the commit buffer with the contents of COMMIT."
1299   (let (author-name author-email subject date msg)
1300     (with-temp-buffer
1301       (let ((coding-system (git-get-logoutput-coding-system)))
1302         (git-call-process-env t nil "log" "-1" "--pretty=medium" commit)
1303         (goto-char (point-min))
1304         (when (re-search-forward "^Author: *\\(.*\\) <\\(.*\\)>$" nil t)
1305           (setq author-name (match-string 1))
1306           (setq author-email (match-string 2)))
1307         (when (re-search-forward "^Date: *\\(.*\\)$" nil t)
1308           (setq date (match-string 1)))
1309         (while (re-search-forward "^    \\(.*\\)$" nil t)
1310           (push (match-string 1) msg))
1311         (setq msg (nreverse msg))
1312         (setq subject (pop msg))
1313         (while (and msg (zerop (length (car msg))) (pop msg)))))
1314     (git-setup-log-buffer (get-buffer-create "*git-commit*")
1315                           author-name author-email subject date
1316                           (mapconcat #'identity msg "\n"))))
1317
1318 (defun git-get-commit-files (commit)
1319   "Retrieve the list of files modified by COMMIT."
1320   (let (files)
1321     (with-temp-buffer
1322       (git-call-process-env t nil "diff-tree" "-r" "-z" "--name-only" "--no-commit-id" commit)
1323       (goto-char (point-min))
1324       (while (re-search-forward "\\([^\0]*\\)\0" nil t 1)
1325         (push (match-string 1) files)))
1326     files))
1327
1328 (defun git-amend-commit ()
1329   "Undo the last commit on HEAD, and set things up to commit an
1330 amended version of it."
1331   (interactive)
1332   (unless git-status (error "Not in git-status buffer."))
1333   (when (git-empty-db-p) (error "No commit to amend."))
1334   (let* ((commit (git-rev-parse "HEAD"))
1335          (files (git-get-commit-files commit)))
1336     (when (git-call-process-display-error "reset" "--soft" "HEAD^")
1337       (git-update-status-files (copy-sequence files) 'uptodate)
1338       (git-mark-files git-status files)
1339       (git-refresh-files)
1340       (git-setup-commit-buffer commit)
1341       (git-commit-file))))
1342
1343 (defun git-find-file ()
1344   "Visit the current file in its own buffer."
1345   (interactive)
1346   (unless git-status (error "Not in git-status buffer."))
1347   (let ((info (ewoc-data (ewoc-locate git-status))))
1348     (unless (git-expand-directory info)
1349       (find-file (git-fileinfo->name info))
1350       (when (eq 'unmerged (git-fileinfo->state info))
1351         (smerge-mode 1)))))
1352
1353 (defun git-find-file-other-window ()
1354   "Visit the current file in its own buffer in another window."
1355   (interactive)
1356   (unless git-status (error "Not in git-status buffer."))
1357   (let ((info (ewoc-data (ewoc-locate git-status))))
1358     (find-file-other-window (git-fileinfo->name info))
1359     (when (eq 'unmerged (git-fileinfo->state info))
1360       (smerge-mode))))
1361
1362 (defun git-find-file-imerge ()
1363   "Visit the current file in interactive merge mode."
1364   (interactive)
1365   (unless git-status (error "Not in git-status buffer."))
1366   (let ((info (ewoc-data (ewoc-locate git-status))))
1367     (find-file (git-fileinfo->name info))
1368     (smerge-ediff)))
1369
1370 (defun git-view-file ()
1371   "View the current file in its own buffer."
1372   (interactive)
1373   (unless git-status (error "Not in git-status buffer."))
1374   (let ((info (ewoc-data (ewoc-locate git-status))))
1375     (view-file (git-fileinfo->name info))))
1376
1377 (defun git-refresh-status ()
1378   "Refresh the git status buffer."
1379   (interactive)
1380   (let* ((status git-status)
1381          (pos (ewoc-locate status))
1382          (marked-files (git-get-filenames (ewoc-collect status (lambda (info) (git-fileinfo->marked info)))))
1383          (cur-name (and pos (git-fileinfo->name (ewoc-data pos)))))
1384     (unless status (error "Not in git-status buffer."))
1385     (message "Refreshing git status...")
1386     (git-call-process-env nil nil "update-index" "--refresh")
1387     (git-clear-status status)
1388     (git-update-status-files nil)
1389     ; restore file marks
1390     (when marked-files
1391       (git-status-filenames-map status
1392                                 (lambda (info)
1393                                         (setf (git-fileinfo->marked info) t)
1394                                         (setf (git-fileinfo->needs-refresh info) t))
1395                                 marked-files)
1396       (git-refresh-files))
1397     ; move point to the current file name if any
1398     (message "Refreshing git status...done")
1399     (let ((node (and cur-name (git-find-status-file status cur-name))))
1400       (when node (ewoc-goto-node status node)))))
1401
1402 (defun git-status-quit ()
1403   "Quit git-status mode."
1404   (interactive)
1405   (bury-buffer))
1406
1407 ;;;; Major Mode
1408 ;;;; ------------------------------------------------------------
1409
1410 (defvar git-status-mode-hook nil
1411   "Run after `git-status-mode' is setup.")
1412
1413 (defvar git-status-mode-map nil
1414   "Keymap for git major mode.")
1415
1416 (defvar git-status nil
1417   "List of all files managed by the git-status mode.")
1418
1419 (unless git-status-mode-map
1420   (let ((map (make-keymap))
1421         (commit-map (make-sparse-keymap))
1422         (diff-map (make-sparse-keymap))
1423         (toggle-map (make-sparse-keymap)))
1424     (suppress-keymap map)
1425     (define-key map "?"   'git-help)
1426     (define-key map "h"   'git-help)
1427     (define-key map " "   'git-next-file)
1428     (define-key map "a"   'git-add-file)
1429     (define-key map "c"   'git-commit-file)
1430     (define-key map "\C-c" commit-map)
1431     (define-key map "d"    diff-map)
1432     (define-key map "="   'git-diff-file)
1433     (define-key map "f"   'git-find-file)
1434     (define-key map "\r"  'git-find-file)
1435     (define-key map "g"   'git-refresh-status)
1436     (define-key map "i"   'git-ignore-file)
1437     (define-key map "l"   'git-log-file)
1438     (define-key map "m"   'git-mark-file)
1439     (define-key map "M"   'git-mark-all)
1440     (define-key map "n"   'git-next-file)
1441     (define-key map "N"   'git-next-unmerged-file)
1442     (define-key map "o"   'git-find-file-other-window)
1443     (define-key map "p"   'git-prev-file)
1444     (define-key map "P"   'git-prev-unmerged-file)
1445     (define-key map "q"   'git-status-quit)
1446     (define-key map "r"   'git-remove-file)
1447     (define-key map "R"   'git-resolve-file)
1448     (define-key map "t"    toggle-map)
1449     (define-key map "T"   'git-toggle-all-marks)
1450     (define-key map "u"   'git-unmark-file)
1451     (define-key map "U"   'git-revert-file)
1452     (define-key map "v"   'git-view-file)
1453     (define-key map "x"   'git-remove-handled)
1454     (define-key map "\C-?" 'git-unmark-file-up)
1455     (define-key map "\M-\C-?" 'git-unmark-all)
1456     ; the commit submap
1457     (define-key commit-map "\C-a" 'git-amend-commit)
1458     ; the diff submap
1459     (define-key diff-map "b" 'git-diff-file-base)
1460     (define-key diff-map "c" 'git-diff-file-combined)
1461     (define-key diff-map "=" 'git-diff-file)
1462     (define-key diff-map "e" 'git-diff-file-idiff)
1463     (define-key diff-map "E" 'git-find-file-imerge)
1464     (define-key diff-map "h" 'git-diff-file-merge-head)
1465     (define-key diff-map "m" 'git-diff-file-mine)
1466     (define-key diff-map "o" 'git-diff-file-other)
1467     ; the toggle submap
1468     (define-key toggle-map "u" 'git-toggle-show-uptodate)
1469     (define-key toggle-map "i" 'git-toggle-show-ignored)
1470     (define-key toggle-map "k" 'git-toggle-show-unknown)
1471     (define-key toggle-map "m" 'git-toggle-all-marks)
1472     (setq git-status-mode-map map))
1473   (easy-menu-define git-menu git-status-mode-map
1474     "Git Menu"
1475     `("Git"
1476       ["Refresh" git-refresh-status t]
1477       ["Commit" git-commit-file t]
1478       ("Merge"
1479         ["Next Unmerged File" git-next-unmerged-file t]
1480         ["Prev Unmerged File" git-prev-unmerged-file t]
1481         ["Mark as Resolved" git-resolve-file t]
1482         ["Interactive Merge File" git-find-file-imerge t]
1483         ["Diff Against Common Base File" git-diff-file-base t]
1484         ["Diff Combined" git-diff-file-combined t]
1485         ["Diff Against Merge Head" git-diff-file-merge-head t]
1486         ["Diff Against Mine" git-diff-file-mine t]
1487         ["Diff Against Other" git-diff-file-other t])
1488       "--------"
1489       ["Add File" git-add-file t]
1490       ["Revert File" git-revert-file t]
1491       ["Ignore File" git-ignore-file t]
1492       ["Remove File" git-remove-file t]
1493       "--------"
1494       ["Find File" git-find-file t]
1495       ["View File" git-view-file t]
1496       ["Diff File" git-diff-file t]
1497       ["Interactive Diff File" git-diff-file-idiff t]
1498       ["Log" git-log-file t]
1499       "--------"
1500       ["Mark" git-mark-file t]
1501       ["Mark All" git-mark-all t]
1502       ["Unmark" git-unmark-file t]
1503       ["Unmark All" git-unmark-all t]
1504       ["Toggle All Marks" git-toggle-all-marks t]
1505       ["Hide Handled Files" git-remove-handled t]
1506       "--------"
1507       ["Show Uptodate Files" git-toggle-show-uptodate :style toggle :selected git-show-uptodate]
1508       ["Show Ignored Files" git-toggle-show-ignored :style toggle :selected git-show-ignored]
1509       ["Show Unknown Files" git-toggle-show-unknown :style toggle :selected git-show-unknown]
1510       "--------"
1511       ["Quit" git-status-quit t])))
1512
1513
1514 ;; git mode should only run in the *git status* buffer
1515 (put 'git-status-mode 'mode-class 'special)
1516
1517 (defun git-status-mode ()
1518   "Major mode for interacting with Git.
1519 Commands:
1520 \\{git-status-mode-map}"
1521   (kill-all-local-variables)
1522   (buffer-disable-undo)
1523   (setq mode-name "git status"
1524         major-mode 'git-status-mode
1525         goal-column 17
1526         buffer-read-only t)
1527   (use-local-map git-status-mode-map)
1528   (let ((buffer-read-only nil))
1529     (erase-buffer)
1530   (let ((status (ewoc-create 'git-fileinfo-prettyprint "" "")))
1531     (set (make-local-variable 'git-status) status))
1532   (set (make-local-variable 'list-buffers-directory) default-directory)
1533   (make-local-variable 'git-show-uptodate)
1534   (make-local-variable 'git-show-ignored)
1535   (make-local-variable 'git-show-unknown)
1536   (run-hooks 'git-status-mode-hook)))
1537
1538 (defun git-find-status-buffer (dir)
1539   "Find the git status buffer handling a specified directory."
1540   (let ((list (buffer-list))
1541         (fulldir (expand-file-name dir))
1542         found)
1543     (while (and list (not found))
1544       (let ((buffer (car list)))
1545         (with-current-buffer buffer
1546           (when (and list-buffers-directory
1547                      (string-equal fulldir (expand-file-name list-buffers-directory))
1548                      (eq major-mode 'git-status-mode))
1549             (setq found buffer))))
1550       (setq list (cdr list)))
1551     found))
1552
1553 (defun git-status (dir)
1554   "Entry point into git-status mode."
1555   (interactive "DSelect directory: ")
1556   (setq dir (git-get-top-dir dir))
1557   (if (file-directory-p (concat (file-name-as-directory dir) ".git"))
1558       (let ((buffer (or (and git-reuse-status-buffer (git-find-status-buffer dir))
1559                         (create-file-buffer (expand-file-name "*git-status*" dir)))))
1560         (switch-to-buffer buffer)
1561         (cd dir)
1562         (git-status-mode)
1563         (git-refresh-status)
1564         (goto-char (point-min))
1565         (add-hook 'after-save-hook 'git-update-saved-file))
1566     (message "%s is not a git working tree." dir)))
1567
1568 (defun git-update-saved-file ()
1569   "Update the corresponding git-status buffer when a file is saved.
1570 Meant to be used in `after-save-hook'."
1571   (let* ((file (expand-file-name buffer-file-name))
1572          (dir (condition-case nil (git-get-top-dir (file-name-directory file)) (error nil)))
1573          (buffer (and dir (git-find-status-buffer dir))))
1574     (when buffer
1575       (with-current-buffer buffer
1576         (let ((filename (file-relative-name file dir)))
1577           ; skip files located inside the .git directory
1578           (unless (string-match "^\\.git/" filename)
1579             (git-call-process-env nil nil "add" "--refresh" "--" filename)
1580             (git-update-status-files (list filename) 'uptodate)))))))
1581
1582 (defun git-help ()
1583   "Display help for Git mode."
1584   (interactive)
1585   (describe-function 'git-status-mode))
1586
1587 (provide 'git)
1588 ;;; git.el ends here