lisp/org-lint.el

   1 ;;; org-lint.el --- Linting for Org documents        -*- lexical-binding: t; -*-
   2
   3 ;; Copyright (C) 2015-2017 Free Software Foundation, Inc.
   4
   5 ;; Author: Nicolas Goaziou <mail@nicolasgoaziou.fr>
   6 ;; Keywords: outlines, hypermedia, calendar, wp
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;; This library implements linting for Org syntax.  The sole public
  26 ;; function is `org-lint', which see.
  27
  28 ;; Internally, the library defines a new structure:
  29 ;; `org-lint-checker', with the following slots:
  30
  31 ;;   - NAME: Unique check identifier, as a non-nil symbol that doesn't
  32 ;;     start with an hyphen.
  33 ;;
  34 ;;     The check is done calling the function `org-lint-NAME' with one
  35 ;;     mandatory argument, the parse tree describing the current Org
  36 ;;     buffer.  Such function calls are wrapped within
  37 ;;     a `save-excursion' and point is always at `point-min'.  Its
  38 ;;     return value has to be an alist (POSITION MESSAGE) when
  39 ;;     POSITION refer to the buffer position of the error, as an
  40 ;;     integer, and MESSAGE is a string describing the error.
  41
  42 ;;   - DESCRIPTION: Summary about the check, as a string.
  43
  44 ;;   - CATEGORIES: Categories relative to the check, as a list of
  45 ;;     symbol.  They are used for filtering when calling `org-lint'.
  46 ;;     Checkers not explicitly associated to a category are collected
  47 ;;     in the `default' one.
  48
  49 ;;   - TRUST: The trust level one can have in the check.  It is either
  50 ;;     `low' or `high', depending on the heuristics implemented and
  51 ;;     the nature of the check.  This has an indicative value only and
  52 ;;     is displayed along reports.
  53
  54 ;; All checks have to be listed in `org-lint--checkers'.
  55
  56 ;; Results are displayed in a special "*Org Lint*" buffer with
  57 ;; a dedicated major mode, derived from `tabulated-list-mode'.
  58 ;;
  59 ;; In addition to the usual key-bindings inherited from it, "C-j" and
  60 ;; "TAB" display problematic line reported under point whereas "RET"
  61 ;; jumps to it.  Also, "h" hides all reports similar to the current
  62 ;; one.  Additionally, "i" removes them from subsequent reports.
  63
  64 ;; Checks currently implemented are:
  65
  66 ;;   - duplicate CUSTOM_ID properties
  67 ;;   - duplicate NAME values
  68 ;;   - duplicate targets
  69 ;;   - duplicate footnote definitions
  70 ;;   - orphaned affiliated keywords
  71 ;;   - obsolete affiliated keywords
  72 ;;   - missing language in src blocks
  73 ;;   - missing back-end in export blocks
  74 ;;   - invalid Babel call blocks
  75 ;;   - NAME values with a colon
  76 ;;   - deprecated export block syntax
  77 ;;   - deprecated Babel header properties
  78 ;;   - wrong header arguments in src blocks
  79 ;;   - misuse of CATEGORY keyword
  80 ;;   - "coderef" links with unknown destination
  81 ;;   - "custom-id" links with unknown destination
  82 ;;   - "fuzzy" links with unknown destination
  83 ;;   - "id" links with unknown destination
  84 ;;   - links to non-existent local files
  85 ;;   - SETUPFILE keywords with non-existent file parameter
  86 ;;   - INCLUDE keywords with wrong link parameter
  87 ;;   - obsolete markup in INCLUDE keyword
  88 ;;   - unknown items in OPTIONS keyword
  89 ;;   - spurious macro arguments or invalid macro templates
  90 ;;   - special properties in properties drawer
  91 ;;   - obsolete syntax for PROPERTIES drawers
  92 ;;   - Invalid EFFORT property value
  93 ;;   - missing definition for footnote references
  94 ;;   - missing reference for footnote definitions
  95 ;;   - non-footnote definitions in footnote section
  96 ;;   - probable invalid keywords
  97 ;;   - invalid blocks
  98 ;;   - misplaced planning info line
  99 ;;   - incomplete drawers
 100 ;;   - indented diary-sexps
 101 ;;   - obsolete QUOTE section
 102 ;;   - obsolete "file+application" link
 103 ;;   - blank headlines with tags
 104
 105 \f
 106 ;;; Code:
 107
 108 (require 'cl-lib)
 109 (require 'org-element)
 110 (require 'org-macro)
 111 (require 'ox)
 112 (require 'ob)
 113
 114 \f
 115 ;;; Checkers
 116
 117 (cl-defstruct (org-lint-checker (:copier nil))
 118   (name 'missing-checker-name)
 119   (description "")
 120   (categories '(default))
 121   (trust 'high))                        ; `low' or `high'
 122
 123 (defun org-lint-missing-checker-name (_)
 124   (error
 125    "`A checker has no `:name' property.  Please verify `org-lint--checkers'"))
 126
 127 (defconst org-lint--checkers
 128   (list
 129    (make-org-lint-checker
 130     :name 'duplicate-custom-id
 131     :description "Report duplicates CUSTOM_ID properties"
 132     :categories '(link))
 133    (make-org-lint-checker
 134     :name 'duplicate-name
 135     :description "Report duplicate NAME values"
 136     :categories '(babel link))
 137    (make-org-lint-checker
 138     :name 'duplicate-target
 139     :description "Report duplicate targets"
 140     :categories '(link))
 141    (make-org-lint-checker
 142     :name 'duplicate-footnote-definition
 143     :description "Report duplicate footnote definitions"
 144     :categories '(footnote))
 145    (make-org-lint-checker
 146     :name 'orphaned-affiliated-keywords
 147     :description "Report orphaned affiliated keywords"
 148     :trust 'low)
 149    (make-org-lint-checker
 150     :name 'obsolete-affiliated-keywords
 151     :description "Report obsolete affiliated keywords"
 152     :categories '(obsolete))
 153    (make-org-lint-checker
 154     :name 'deprecated-export-blocks
 155     :description "Report deprecated export block syntax"
 156     :categories '(obsolete export)
 157     :trust 'low)
 158    (make-org-lint-checker
 159     :name 'deprecated-header-syntax
 160     :description "Report deprecated Babel header syntax"
 161     :categories '(obsolete babel)
 162     :trust 'low)
 163    (make-org-lint-checker
 164     :name 'missing-language-in-src-block
 165     :description "Report missing language in src blocks"
 166     :categories '(babel))
 167    (make-org-lint-checker
 168     :name 'missing-backend-in-export-block
 169     :description "Report missing back-end in export blocks"
 170     :categories '(export))
 171    (make-org-lint-checker
 172     :name 'invalid-babel-call-block
 173     :description "Report invalid Babel call blocks"
 174     :categories '(babel))
 175    (make-org-lint-checker
 176     :name 'colon-in-name
 177     :description "Report NAME values with a colon"
 178     :categories '(babel))
 179    (make-org-lint-checker
 180     :name 'wrong-header-argument
 181     :description "Report wrong babel headers"
 182     :categories '(babel))
 183    (make-org-lint-checker
 184     :name 'wrong-header-value
 185     :description "Report invalid value in babel headers"
 186     :categories '(babel)
 187     :trust 'low)
 188    (make-org-lint-checker
 189     :name 'deprecated-category-setup
 190     :description "Report misuse of CATEGORY keyword"
 191     :categories '(obsolete))
 192    (make-org-lint-checker
 193     :name 'invalid-coderef-link
 194     :description "Report \"coderef\" links with unknown destination"
 195     :categories '(link))
 196    (make-org-lint-checker
 197     :name 'invalid-custom-id-link
 198     :description "Report \"custom-id\" links with unknown destination"
 199     :categories '(link))
 200    (make-org-lint-checker
 201     :name 'invalid-fuzzy-link
 202     :description "Report \"fuzzy\" links with unknown destination"
 203     :categories '(link))
 204    (make-org-lint-checker
 205     :name 'invalid-id-link
 206     :description "Report \"id\" links with unknown destination"
 207     :categories '(link))
 208    (make-org-lint-checker
 209     :name 'link-to-local-file
 210     :description "Report links to non-existent local files"
 211     :categories '(link)
 212     :trust 'low)
 213    (make-org-lint-checker
 214     :name 'non-existent-setupfile-parameter
 215     :description "Report SETUPFILE keywords with non-existent file parameter"
 216     :trust 'low)
 217    (make-org-lint-checker
 218     :name 'wrong-include-link-parameter
 219     :description "Report INCLUDE keywords with misleading link parameter"
 220     :categories '(export)
 221     :trust 'low)
 222    (make-org-lint-checker
 223     :name 'obsolete-include-markup
 224     :description "Report obsolete markup in INCLUDE keyword"
 225     :categories '(obsolete export)
 226     :trust 'low)
 227    (make-org-lint-checker
 228     :name 'unknown-options-item
 229     :description "Report unknown items in OPTIONS keyword"
 230     :categories '(export)
 231     :trust 'low)
 232    (make-org-lint-checker
 233     :name 'invalid-macro-argument-and-template
 234     :description "Report spurious macro arguments or invalid macro templates"
 235     :categories '(export)
 236     :trust 'low)
 237    (make-org-lint-checker
 238     :name 'special-property-in-properties-drawer
 239     :description "Report special properties in properties drawers"
 240     :categories '(properties))
 241    (make-org-lint-checker
 242     :name 'obsolete-properties-drawer
 243     :description "Report obsolete syntax for properties drawers"
 244     :categories '(obsolete properties))
 245    (make-org-lint-checker
 246     :name 'invalid-effort-property
 247     :description "Report invalid duration in EFFORT property"
 248     :categories '(properties))
 249    (make-org-lint-checker
 250     :name 'undefined-footnote-reference
 251     :description "Report missing definition for footnote references"
 252     :categories '(footnote))
 253    (make-org-lint-checker
 254     :name 'unreferenced-footnote-definition
 255     :description "Report missing reference for footnote definitions"
 256     :categories '(footnote))
 257    (make-org-lint-checker
 258     :name 'extraneous-element-in-footnote-section
 259     :description "Report non-footnote definitions in footnote section"
 260     :categories '(footnote))
 261    (make-org-lint-checker
 262     :name 'invalid-keyword-syntax
 263     :description "Report probable invalid keywords"
 264     :trust 'low)
 265    (make-org-lint-checker
 266     :name 'invalid-block
 267     :description "Report invalid blocks"
 268     :trust 'low)
 269    (make-org-lint-checker
 270     :name 'misplaced-planning-info
 271     :description "Report misplaced planning info line"
 272     :trust 'low)
 273    (make-org-lint-checker
 274     :name 'incomplete-drawer
 275     :description "Report probable incomplete drawers"
 276     :trust 'low)
 277    (make-org-lint-checker
 278     :name 'indented-diary-sexp
 279     :description "Report probable indented diary-sexps"
 280     :trust 'low)
 281    (make-org-lint-checker
 282     :name 'quote-section
 283     :description "Report obsolete QUOTE section"
 284     :categories '(obsolete)
 285     :trust 'low)
 286    (make-org-lint-checker
 287     :name 'file-application
 288     :description "Report obsolete \"file+application\" link"
 289     :categories '(link obsolete))
 290    (make-org-lint-checker
 291     :name 'empty-headline-with-tags
 292     :description "Report ambiguous empty headlines with tags"
 293     :categories '(headline)
 294     :trust 'low))
 295   "List of all available checkers.")
 296
 297 (defun org-lint--collect-duplicates
 298     (ast type extract-key extract-position build-message)
 299   "Helper function to collect duplicates in parse tree AST.
 300
 301 EXTRACT-KEY is a function extracting key.  It is called with
 302 a single argument: the element or object.  Comparison is done
 303 with `equal'.
 304
 305 EXTRACT-POSITION is a function returning position for the report.
 306 It is called with two arguments, the object or element, and the
 307 key.
 308
 309 BUILD-MESSAGE is a function creating the report message.  It is
 310 called with one argument, the key used for comparison."
 311   (let* (keys
 312          originals
 313          reports
 314          (make-report
 315           (lambda (position value)
 316             (push (list position (funcall build-message value)) reports))))
 317     (org-element-map ast type
 318       (lambda (datum)
 319         (let ((key (funcall extract-key datum)))
 320           (cond
 321            ((not key))
 322            ((assoc key keys) (cl-pushnew (assoc key keys) originals)
 323             (funcall make-report (funcall extract-position datum key) key))
 324            (t (push (cons key (funcall extract-position datum key)) keys))))))
 325     (dolist (e originals reports) (funcall make-report (cdr e) (car e)))))
 326
 327 (defun org-lint-duplicate-custom-id (ast)
 328   (org-lint--collect-duplicates
 329    ast
 330    'node-property
 331    (lambda (property)
 332      (and (eq (compare-strings "CUSTOM_ID" nil nil
 333                                (org-element-property :key property) nil nil
 334                                t)
 335               t)
 336           (org-element-property :value property)))
 337    (lambda (property _) (org-element-property :begin property))
 338    (lambda (key) (format "Duplicate CUSTOM_ID property \"%s\"" key))))
 339
 340 (defun org-lint-duplicate-name (ast)
 341   (org-lint--collect-duplicates
 342    ast
 343    org-element-all-elements
 344    (lambda (datum) (org-element-property :name datum))
 345    (lambda (datum name)
 346      (goto-char (org-element-property :begin datum))
 347      (re-search-forward
 348       (format "^[ \t]*#\\+[A-Za-z]+: +%s *$" (regexp-quote name)))
 349      (match-beginning 0))
 350    (lambda (key) (format "Duplicate NAME \"%s\"" key))))
 351
 352 (defun org-lint-duplicate-target (ast)
 353   (org-lint--collect-duplicates
 354    ast
 355    'target
 356    (lambda (target) (split-string (org-element-property :value target)))
 357    (lambda (target _) (org-element-property :begin target))
 358    (lambda (key)
 359      (format "Duplicate target <<%s>>" (mapconcat #'identity key " ")))))
 360
 361 (defun org-lint-duplicate-footnote-definition (ast)
 362   (org-lint--collect-duplicates
 363    ast
 364    'footnote-definition
 365    (lambda (definition)  (org-element-property :label definition))
 366    (lambda (definition _) (org-element-property :post-affiliated definition))
 367    (lambda (key) (format "Duplicate footnote definition \"%s\"" key))))
 368
 369 (defun org-lint-orphaned-affiliated-keywords (ast)
 370   ;; Ignore orphan RESULTS keywords, which could be generated from
 371   ;; a source block returning no value.
 372   (let ((keywords (cl-set-difference org-element-affiliated-keywords
 373                                      '("RESULT" "RESULTS")
 374                                      :test #'equal)))
 375     (org-element-map ast 'keyword
 376       (lambda (k)
 377         (let ((key (org-element-property :key k)))
 378           (and (or (let ((case-fold-search t))
 379                      (string-match-p "\\`ATTR_[-_A-Za-z0-9]+\\'" key))
 380                    (member key keywords))
 381                (list (org-element-property :post-affiliated k)
 382                      (format "Orphaned affiliated keyword: \"%s\"" key))))))))
 383
 384 (defun org-lint-obsolete-affiliated-keywords (_)
 385   (let ((regexp (format "^[ \t]*#\\+%s:"
 386                         (regexp-opt '("DATA" "LABEL" "RESNAME" "SOURCE"
 387                                       "SRCNAME" "TBLNAME" "RESULT" "HEADERS")
 388                                     t)))
 389         reports)
 390     (while (re-search-forward regexp nil t)
 391       (let ((key (upcase (match-string-no-properties 1))))
 392         (when (< (point)
 393                  (org-element-property :post-affiliated (org-element-at-point)))
 394           (push
 395            (list (line-beginning-position)
 396                  (format
 397                   "Obsolete affiliated keyword: \"%s\".  Use \"%s\" instead"
 398                   key
 399                   (pcase key
 400                     ("HEADERS" "HEADER")
 401                     ("RESULT" "RESULTS")
 402                     (_ "NAME"))))
 403            reports))))
 404     reports))
 405
 406 (defun org-lint-deprecated-export-blocks (ast)
 407   (let ((deprecated '("ASCII" "BEAMER" "HTML" "LATEX" "MAN" "MARKDOWN" "MD"
 408                       "ODT" "ORG" "TEXINFO")))
 409     (org-element-map ast 'special-block
 410       (lambda (b)
 411         (let ((type (org-element-property :type b)))
 412           (when (member-ignore-case type deprecated)
 413             (list
 414              (org-element-property :post-affiliated b)
 415              (format
 416               "Deprecated syntax for export block.  Use \"BEGIN_EXPORT %s\" \
 417 instead"
 418               type))))))))
 419
 420 (defun org-lint-deprecated-header-syntax (ast)
 421   (let* ((deprecated-babel-properties
 422           (mapcar (lambda (arg) (symbol-name (car arg)))
 423                   org-babel-common-header-args-w-values))
 424          (deprecated-re
 425           (format "\\`%s[ \t]" (regexp-opt deprecated-babel-properties t))))
 426     (org-element-map ast '(keyword node-property)
 427       (lambda (datum)
 428         (let ((key (org-element-property :key datum)))
 429           (pcase (org-element-type datum)
 430             (`keyword
 431              (let ((value (org-element-property :value datum)))
 432                (and (string= key "PROPERTY")
 433                     (string-match deprecated-re value)
 434                     (list (org-element-property :begin datum)
 435                           (format "Deprecated syntax for \"%s\".  \
 436 Use header-args instead"
 437                                   (match-string-no-properties 1 value))))))
 438             (`node-property
 439              (and (member-ignore-case key deprecated-babel-properties)
 440                   (list
 441                    (org-element-property :begin datum)
 442                    (format "Deprecated syntax for \"%s\".  \
 443 Use :header-args: instead"
 444                            key))))))))))
 445
 446 (defun org-lint-missing-language-in-src-block (ast)
 447   (org-element-map ast 'src-block
 448     (lambda (b)
 449       (unless (org-element-property :language b)
 450         (list (org-element-property :post-affiliated b)
 451               "Missing language in source block")))))
 452
 453 (defun org-lint-missing-backend-in-export-block (ast)
 454   (org-element-map ast 'export-block
 455     (lambda (b)
 456       (unless (org-element-property :type b)
 457         (list (org-element-property :post-affiliated b)
 458               "Missing back-end in export block")))))
 459
 460 (defun org-lint-invalid-babel-call-block (ast)
 461   (org-element-map ast 'babel-call
 462     (lambda (b)
 463       (cond
 464        ((not (org-element-property :call b))
 465         (list (org-element-property :post-affiliated b)
 466               "Invalid syntax in babel call block"))
 467        ((let ((h (org-element-property :end-header b)))
 468           (and h (string-match-p "\\`\\[.*\\]\\'" h)))
 469         (list
 470          (org-element-property :post-affiliated b)
 471          "Babel call's end header must not be wrapped within brackets"))))))
 472
 473 (defun org-lint-deprecated-category-setup (ast)
 474   (org-element-map ast 'keyword
 475     (let (category-flag)
 476       (lambda (k)
 477         (cond
 478          ((not (string= (org-element-property :key k) "CATEGORY")) nil)
 479          (category-flag
 480           (list (org-element-property :post-affiliated k)
 481                 "Spurious CATEGORY keyword.  Set :CATEGORY: property instead"))
 482          (t (setf category-flag t) nil))))))
 483
 484 (defun org-lint-invalid-coderef-link (ast)
 485   (let ((info (list :parse-tree ast)))
 486     (org-element-map ast 'link
 487       (lambda (link)
 488         (let ((ref (org-element-property :path link)))
 489           (and (equal (org-element-property :type link) "coderef")
 490                (not (ignore-errors (org-export-resolve-coderef ref info)))
 491                (list (org-element-property :begin link)
 492                      (format "Unknown coderef \"%s\"" ref))))))))
 493
 494 (defun org-lint-invalid-custom-id-link (ast)
 495   (let ((info (list :parse-tree ast)))
 496     (org-element-map ast 'link
 497       (lambda (link)
 498         (and (equal (org-element-property :type link) "custom-id")
 499              (not (ignore-errors (org-export-resolve-id-link link info)))
 500              (list (org-element-property :begin link)
 501                    (format "Unknown custom ID \"%s\""
 502                            (org-element-property :path link))))))))
 503
 504 (defun org-lint-invalid-fuzzy-link (ast)
 505   (let ((info (list :parse-tree ast)))
 506     (org-element-map ast 'link
 507       (lambda (link)
 508         (and (equal (org-element-property :type link) "fuzzy")
 509              (not (ignore-errors (org-export-resolve-fuzzy-link link info)))
 510              (list (org-element-property :begin link)
 511                    (format "Unknown fuzzy location \"%s\""
 512                            (let ((path (org-element-property :path link)))
 513                              (if (string-prefix-p "*" path)
 514                                  (substring path 1)
 515                                path)))))))))
 516
 517 (defun org-lint-invalid-id-link (ast)
 518   (org-element-map ast 'link
 519     (lambda (link)
 520       (let ((id (org-element-property :path link)))
 521         (and (equal (org-element-property :type link) "id")
 522              (not (org-id-find id))
 523              (list (org-element-property :begin link)
 524                    (format "Unknown ID \"%s\"" id)))))))
 525
 526 (defun org-lint-special-property-in-properties-drawer (ast)
 527   (org-element-map ast 'node-property
 528     (lambda (p)
 529       (let ((key (org-element-property :key p)))
 530         (and (member-ignore-case key org-special-properties)
 531              (list (org-element-property :begin p)
 532                    (format
 533                     "Special property \"%s\" found in a properties drawer"
 534                     key)))))))
 535
 536 (defun org-lint-obsolete-properties-drawer (ast)
 537   (org-element-map ast 'drawer
 538     (lambda (d)
 539       (when (equal (org-element-property :drawer-name d) "PROPERTIES")
 540         (let ((section (org-element-lineage d '(section))))
 541           (unless (org-element-map section 'property-drawer #'identity nil t)
 542             (list (org-element-property :post-affiliated d)
 543                   (if (save-excursion
 544                         (goto-char (org-element-property :post-affiliated d))
 545                         (forward-line -1)
 546                         (or (org-at-heading-p) (org-at-planning-p)))
 547                       "Incorrect contents for PROPERTIES drawer"
 548                     "Incorrect location for PROPERTIES drawer"))))))))
 549
 550 (defun org-lint-invalid-effort-property (ast)
 551   (org-element-map ast 'node-property
 552     (lambda (p)
 553       (when (equal "EFFORT" (org-element-property :key p))
 554         (let ((value (org-element-property :value p)))
 555           (and (org-string-nw-p value)
 556                (not (org-duration-p value))
 557                (list (org-element-property :begin p)
 558                      (format "Invalid effort duration format: %S" value))))))))
 559
 560 (defun org-lint-link-to-local-file (ast)
 561   (org-element-map ast 'link
 562     (lambda (l)
 563       (when (equal (org-element-property :type l) "file")
 564         (let ((file (org-link-unescape (org-element-property :path l))))
 565           (and (not (file-remote-p file))
 566                (not (file-exists-p file))
 567                (list (org-element-property :begin l)
 568                      (format (if (org-element-lineage l '(link))
 569                                  "Link to non-existent image file \"%s\"\
 570  in link description"
 571                                "Link to non-existent local file \"%s\"")
 572                              file))))))))
 573
 574 (defun org-lint-non-existent-setupfile-parameter (ast)
 575   (org-element-map ast 'keyword
 576     (lambda (k)
 577       (when (equal (org-element-property :key k) "SETUPFILE")
 578         (let ((file (org-unbracket-string
 579                      "\"" "\""
 580                      (org-element-property :value k))))
 581           (and (not (file-remote-p file))
 582                (not (file-exists-p file))
 583                (list (org-element-property :begin k)
 584                      (format "Non-existent setup file \"%s\"" file))))))))
 585
 586 (defun org-lint-wrong-include-link-parameter (ast)
 587   (org-element-map ast 'keyword
 588     (lambda (k)
 589       (when (equal (org-element-property :key k) "INCLUDE")
 590         (let* ((value (org-element-property :value k))
 591                (path
 592                 (and (string-match "^\\(\".+\"\\|\\S-+\\)[ \t]*" value)
 593                      (save-match-data
 594                        (org-unbracket-string "\"" "\"" (match-string 1 value))))))
 595           (if (not path)
 596               (list (org-element-property :post-affiliated k)
 597                     "Missing location argument in INCLUDE keyword")
 598             (let* ((file (org-string-nw-p
 599                           (if (string-match "::\\(.*\\)\\'" path)
 600                               (substring path 0 (match-beginning 0))
 601                             path)))
 602                    (search (and (not (equal file path))
 603                                 (org-string-nw-p (match-string 1 path)))))
 604               (if (and file
 605                        (not (file-remote-p file))
 606                        (not (file-exists-p file)))
 607                   (list (org-element-property :post-affiliated k)
 608                         "Non-existent file argument in INCLUDE keyword")
 609                 (let* ((visiting (if file (find-buffer-visiting file)
 610                                    (current-buffer)))
 611                        (buffer (or visiting (find-file-noselect file))))
 612                   (unwind-protect
 613                       (with-current-buffer buffer
 614                         (when (and search
 615                                    (not
 616                                     (ignore-errors
 617                                       (let ((org-link-search-inhibit-query t))
 618                                         (org-link-search search nil t)))))
 619                           (list (org-element-property :post-affiliated k)
 620                                 (format
 621                                  "Invalid search part \"%s\" in INCLUDE keyword"
 622                                  search))))
 623                     (unless visiting (kill-buffer buffer))))))))))))
 624
 625 (defun org-lint-obsolete-include-markup (ast)
 626   (let ((regexp (format "\\`\\(?:\".+\"\\|\\S-+\\)[ \t]+%s"
 627                         (regexp-opt
 628                          '("ASCII" "BEAMER" "HTML" "LATEX" "MAN" "MARKDOWN" "MD"
 629                            "ODT" "ORG" "TEXINFO")
 630                          t))))
 631     (org-element-map ast 'keyword
 632       (lambda (k)
 633         (when (equal (org-element-property :key k) "INCLUDE")
 634           (let ((case-fold-search t)
 635                 (value (org-element-property :value k)))
 636             (when (string-match regexp value)
 637               (let ((markup (match-string-no-properties 1 value)))
 638                 (list (org-element-property :post-affiliated k)
 639                       (format "Obsolete markup \"%s\" in INCLUDE keyword.  \
 640 Use \"export %s\" instead"
 641                               markup
 642                               markup))))))))))
 643
 644 (defun org-lint-unknown-options-item (ast)
 645   (let ((allowed (delq nil
 646                        (append
 647                         (mapcar (lambda (o) (nth 2 o)) org-export-options-alist)
 648                         (cl-mapcan
 649                          (lambda (b)
 650                            (mapcar (lambda (o) (nth 2 o))
 651                                    (org-export-backend-options b)))
 652                          org-export-registered-backends))))
 653         reports)
 654     (org-element-map ast 'keyword
 655       (lambda (k)
 656         (when (string= (org-element-property :key k) "OPTIONS")
 657           (let ((value (org-element-property :value k))
 658                 (start 0))
 659             (while (string-match "\\(.+?\\):\\((.*?)\\|\\S-*\\)[ \t]*"
 660                                  value
 661                                  start)
 662               (setf start (match-end 0))
 663               (let ((item (match-string 1 value)))
 664                 (unless (member item allowed)
 665                   (push (list (org-element-property :post-affiliated k)
 666                               (format "Unknown OPTIONS item \"%s\"" item))
 667                         reports))))))))
 668     reports))
 669
 670 (defun org-lint-invalid-macro-argument-and-template (ast)
 671   (let ((extract-placeholders
 672          (lambda (template)
 673            (let ((start 0)
 674                  args)
 675              (while (string-match "\\$\\([1-9][0-9]*\\)" template start)
 676                (setf start (match-end 0))
 677                (push (string-to-number (match-string 1 template)) args))
 678              (sort (org-uniquify args) #'<))))
 679         reports)
 680     ;; Check arguments for macro templates.
 681     (org-element-map ast 'keyword
 682       (lambda (k)
 683         (when (string= (org-element-property :key k) "MACRO")
 684           (let* ((value (org-element-property :value k))
 685                  (name (and (string-match "^\\S-+" value)
 686                             (match-string 0 value)))
 687                  (template (and name
 688                                 (org-trim (substring value (match-end 0))))))
 689             (cond
 690              ((not name)
 691               (push (list (org-element-property :post-affiliated k)
 692                           "Missing name in MACRO keyword")
 693                     reports))
 694              ((not (org-string-nw-p template))
 695               (push (list (org-element-property :post-affiliated k)
 696                           "Missing template in macro \"%s\"" name)
 697                     reports))
 698              (t
 699               (unless (let ((args (funcall extract-placeholders template)))
 700                         (equal (number-sequence 1 (or (org-last args) 0)) args))
 701                 (push (list (org-element-property :post-affiliated k)
 702                             (format "Unused placeholders in macro \"%s\""
 703                                     name))
 704                       reports))))))))
 705     ;; Check arguments for macros.
 706     (org-macro-initialize-templates)
 707     (let ((templates (append
 708                       (mapcar (lambda (m) (cons m "$1"))
 709                               '("author" "date" "email" "title" "results"))
 710                       org-macro-templates)))
 711       (org-element-map ast 'macro
 712         (lambda (macro)
 713           (let* ((name (org-element-property :key macro))
 714                  (template (cdr (assoc-string name templates t))))
 715             (if (not template)
 716                 (push (list (org-element-property :begin macro)
 717                             (format "Undefined macro \"%s\"" name))
 718                       reports)
 719               (let ((arg-numbers (funcall extract-placeholders template)))
 720                 (when arg-numbers
 721                   (let ((spurious-args
 722                          (nthcdr (apply #'max arg-numbers)
 723                                  (org-element-property :args macro))))
 724                     (when spurious-args
 725                       (push
 726                        (list (org-element-property :begin macro)
 727                              (format "Unused argument%s in macro \"%s\": %s"
 728                                      (if (> (length spurious-args) 1) "s" "")
 729                                      name
 730                                      (mapconcat (lambda (a) (format "\"%s\"" a))
 731                                                 spurious-args
 732                                                 ", ")))
 733                        reports))))))))))
 734     reports))
 735
 736 (defun org-lint-undefined-footnote-reference (ast)
 737   (let ((definitions (org-element-map ast 'footnote-definition
 738                        (lambda (f) (org-element-property :label f)))))
 739     (org-element-map ast 'footnote-reference
 740       (lambda (f)
 741         (let ((label (org-element-property :label f)))
 742           (and (eq 'standard (org-element-property :type f))
 743                (not (member label definitions))
 744                (list (org-element-property :begin f)
 745                      (format "Missing definition for footnote [%s]"
 746                              label))))))))
 747
 748 (defun org-lint-unreferenced-footnote-definition (ast)
 749   (let ((references (org-element-map ast 'footnote-reference
 750                       (lambda (f) (org-element-property :label f)))))
 751     (org-element-map ast 'footnote-definition
 752       (lambda (f)
 753         (let ((label (org-element-property :label f)))
 754           (and label
 755                (not (member label references))
 756                (list (org-element-property :post-affiliated f)
 757                      (format "No reference for footnote definition [%s]"
 758                              label))))))))
 759
 760 (defun org-lint-colon-in-name (ast)
 761   (org-element-map ast org-element-all-elements
 762     (lambda (e)
 763       (let ((name (org-element-property :name e)))
 764         (and name
 765              (string-match-p ":" name)
 766              (list (progn
 767                      (goto-char (org-element-property :begin e))
 768                      (re-search-forward
 769                       (format "^[ \t]*#\\+\\w+: +%s *$" (regexp-quote name)))
 770                      (match-beginning 0))
 771                    (format
 772                     "Name \"%s\" contains a colon; Babel cannot use it as input"
 773                     name)))))))
 774
 775 (defun org-lint-misplaced-planning-info (_)
 776   (let ((case-fold-search t)
 777         reports)
 778     (while (re-search-forward org-planning-line-re nil t)
 779       (unless (memq (org-element-type (org-element-at-point))
 780                     '(comment-block example-block export-block planning
 781                                     src-block verse-block))
 782         (push (list (line-beginning-position) "Misplaced planning info line")
 783               reports)))
 784     reports))
 785
 786 (defun org-lint-incomplete-drawer (_)
 787   (let (reports)
 788     (while (re-search-forward org-drawer-regexp nil t)
 789       (let ((name (org-trim (match-string-no-properties 0)))
 790             (element (org-element-at-point)))
 791         (pcase (org-element-type element)
 792           ((or `drawer `property-drawer)
 793            (goto-char (org-element-property :end element))
 794            nil)
 795           ((or `comment-block `example-block `export-block `src-block
 796                `verse-block)
 797            nil)
 798           (_
 799            (push (list (line-beginning-position)
 800                        (format "Possible incomplete drawer \"%s\"" name))
 801                  reports)))))
 802     reports))
 803
 804 (defun org-lint-indented-diary-sexp (_)
 805   (let (reports)
 806     (while (re-search-forward "^[ \t]+%%(" nil t)
 807       (unless (memq (org-element-type (org-element-at-point))
 808                     '(comment-block diary-sexp example-block export-block
 809                                     src-block verse-block))
 810         (push (list (line-beginning-position) "Possible indented diary-sexp")
 811               reports)))
 812     reports))
 813
 814 (defun org-lint-invalid-block (_)
 815   (let ((case-fold-search t)
 816         (regexp "^[ \t]*#\\+\\(BEGIN\\|END\\)\\(?::\\|_[^[:space:]]*\\)?[ \t]*")
 817         reports)
 818     (while (re-search-forward regexp nil t)
 819       (let ((name (org-trim (buffer-substring-no-properties
 820                              (line-beginning-position) (line-end-position)))))
 821         (cond
 822          ((and (string-prefix-p "END" (match-string 1) t)
 823                (not (eolp)))
 824           (push (list (line-beginning-position)
 825                       (format "Invalid block closing line \"%s\"" name))
 826                 reports))
 827          ((not (memq (org-element-type (org-element-at-point))
 828                      '(center-block comment-block dynamic-block example-block
 829                                     export-block quote-block special-block
 830                                     src-block verse-block)))
 831           (push (list (line-beginning-position)
 832                       (format "Possible incomplete block \"%s\""
 833                               name))
 834                 reports)))))
 835     reports))
 836
 837 (defun org-lint-invalid-keyword-syntax (_)
 838   (let ((regexp "^[ \t]*#\\+\\([^[:space:]:]*\\)\\(?: \\|$\\)")
 839         (exception-re
 840          (format "[ \t]*#\\+%s\\(\\[.*\\]\\)?:\\(?: \\|$\\)"
 841                  (regexp-opt org-element-dual-keywords)))
 842         reports)
 843     (while (re-search-forward regexp nil t)
 844       (let ((name (match-string-no-properties 1)))
 845         (unless (or (string-prefix-p "BEGIN" name t)
 846                     (string-prefix-p "END" name t)
 847                     (save-excursion
 848                       (beginning-of-line)
 849                       (let ((case-fold-search t)) (looking-at exception-re))))
 850           (push (list (match-beginning 0)
 851                       (format "Possible missing colon in keyword \"%s\"" name))
 852                 reports))))
 853     reports))
 854
 855 (defun org-lint-extraneous-element-in-footnote-section (ast)
 856   (org-element-map ast 'headline
 857     (lambda (h)
 858       (and (org-element-property :footnote-section-p h)
 859            (org-element-map (org-element-contents h)
 860                (cl-remove-if
 861                 (lambda (e)
 862                   (memq e '(comment comment-block footnote-definition
 863                                     property-drawer section)))
 864                 org-element-all-elements)
 865              (lambda (e)
 866                (not (and (eq (org-element-type e) 'headline)
 867                          (org-element-property :commentedp e))))
 868              nil t '(footnote-definition property-drawer))
 869            (list (org-element-property :begin h)
 870                  "Extraneous elements in footnote section are not exported")))))
 871
 872 (defun org-lint-quote-section (ast)
 873   (org-element-map ast '(headline inlinetask)
 874     (lambda (h)
 875       (let ((title (org-element-property :raw-value h)))
 876         (and (or (string-prefix-p "QUOTE " title)
 877                  (string-prefix-p (concat org-comment-string " QUOTE ") title))
 878              (list (org-element-property :begin h)
 879                    "Deprecated QUOTE section"))))))
 880
 881 (defun org-lint-file-application (ast)
 882   (org-element-map ast 'link
 883     (lambda (l)
 884       (let ((app (org-element-property :application l)))
 885         (and app
 886              (list (org-element-property :begin l)
 887                    (format "Deprecated \"file+%s\" link type" app)))))))
 888
 889 (defun org-lint-wrong-header-argument (ast)
 890   (let* ((reports)
 891          (verify
 892           (lambda (datum language headers)
 893             (let ((allowed
 894                    ;; If LANGUAGE is specified, restrict allowed
 895                    ;; headers to both LANGUAGE-specific and default
 896                    ;; ones.  Otherwise, accept headers from any loaded
 897                    ;; language.
 898                    (append
 899                     org-babel-header-arg-names
 900                     (cl-mapcan
 901                      (lambda (l)
 902                        (let ((v (intern (format "org-babel-header-args:%s" l))))
 903                          (and (boundp v) (mapcar #'car (symbol-value v)))))
 904                      (if language (list language)
 905                        (mapcar #'car org-babel-load-languages))))))
 906               (dolist (header headers)
 907                 (let ((h (symbol-name (car header)))
 908                       (p (or (org-element-property :post-affiliated datum)
 909                              (org-element-property :begin datum))))
 910                   (cond
 911                    ((not (string-prefix-p ":" h))
 912                     (push
 913                      (list p
 914                            (format "Missing colon in header argument \"%s\"" h))
 915                      reports))
 916                    ((assoc-string (substring h 1) allowed))
 917                    (t (push (list p (format "Unknown header argument \"%s\"" h))
 918                             reports)))))))))
 919     (org-element-map ast '(babel-call inline-babel-call inline-src-block keyword
 920                                       node-property src-block)
 921       (lambda (datum)
 922         (pcase (org-element-type datum)
 923           ((or `babel-call `inline-babel-call)
 924            (funcall verify
 925                     datum
 926                     nil
 927                     (cl-mapcan #'org-babel-parse-header-arguments
 928                                (list
 929                                 (org-element-property :inside-header datum)
 930                                 (org-element-property :end-header datum)))))
 931           (`inline-src-block
 932            (funcall verify
 933                     datum
 934                     (org-element-property :language datum)
 935                     (org-babel-parse-header-arguments
 936                      (org-element-property :parameters datum))))
 937           (`keyword
 938            (when (string= (org-element-property :key datum) "PROPERTY")
 939              (let ((value (org-element-property :value datum)))
 940                (when (string-match "\\`header-args\\(?::\\(\\S-+\\)\\)?\\+? *"
 941                                    value)
 942                  (funcall verify
 943                           datum
 944                           (match-string 1 value)
 945                           (org-babel-parse-header-arguments
 946                            (substring value (match-end 0))))))))
 947           (`node-property
 948            (let ((key (org-element-property :key datum)))
 949              (when (let ((case-fold-search t))
 950                      (string-match "\\`HEADER-ARGS\\(?::\\(\\S-+\\)\\)?\\+?"
 951                                    key))
 952                (funcall verify
 953                         datum
 954                         (match-string 1 key)
 955                         (org-babel-parse-header-arguments
 956                          (org-element-property :value datum))))))
 957           (`src-block
 958            (funcall verify
 959                     datum
 960                     (org-element-property :language datum)
 961                     (cl-mapcan #'org-babel-parse-header-arguments
 962                                (cons (org-element-property :parameters datum)
 963                                      (org-element-property :header datum))))))))
 964     reports))
 965
 966 (defun org-lint-wrong-header-value (ast)
 967   (let (reports)
 968     (org-element-map ast
 969         '(babel-call inline-babel-call inline-src-block src-block)
 970       (lambda (datum)
 971         (let* ((type (org-element-type datum))
 972                (language (org-element-property :language datum))
 973                (allowed-header-values
 974                 (append (and language
 975                              (let ((v (intern (concat "org-babel-header-args:"
 976                                                       language))))
 977                                (and (boundp v) (symbol-value v))))
 978                         org-babel-common-header-args-w-values))
 979                (datum-header-values
 980                 (org-babel-parse-header-arguments
 981                  (org-trim
 982                   (pcase type
 983                     (`src-block
 984                      (mapconcat
 985                       #'identity
 986                       (cons (org-element-property :parameters datum)
 987                             (org-element-property :header datum))
 988                       " "))
 989                     (`inline-src-block
 990                      (or (org-element-property :parameters datum) ""))
 991                     (_
 992                      (concat
 993                       (org-element-property :inside-header datum)
 994                       " "
 995                       (org-element-property :end-header datum))))))))
 996           (dolist (header datum-header-values)
 997             (let ((allowed-values
 998                    (cdr (assoc-string (substring (symbol-name (car header)) 1)
 999                                       allowed-header-values))))
1000               (unless (memq allowed-values '(:any nil))
1001                 (let ((values (cdr header))
1002                       groups-alist)
1003                   (dolist (v (if (stringp values) (split-string values)
1004                                (list values)))
1005                     (let ((valid-value nil))
1006                       (catch 'exit
1007                         (dolist (group allowed-values)
1008                           (cond
1009                            ((not (funcall
1010                                   (if (stringp v) #'assoc-string #'assoc)
1011                                   v group))
1012                             (when (memq :any group)
1013                               (setf valid-value t)
1014                               (push (cons group v) groups-alist)))
1015                            ((assq group groups-alist)
1016                             (push
1017                              (list
1018                               (or (org-element-property :post-affiliated datum)
1019                                   (org-element-property :begin datum))
1020                               (format
1021                                "Forbidden combination in header \"%s\": %s, %s"
1022                                (car header)
1023                                (cdr (assq group groups-alist))
1024                                v))
1025                              reports)
1026                             (throw 'exit nil))
1027                            (t (push (cons group v) groups-alist)
1028                               (setf valid-value t))))
1029                         (unless valid-value
1030                           (push
1031                            (list
1032                             (or (org-element-property :post-affiliated datum)
1033                                 (org-element-property :begin datum))
1034                             (format "Unknown value \"%s\" for header \"%s\""
1035                                     v
1036                                     (car header)))
1037                            reports))))))))))))
1038     reports))
1039
1040 (defun org-lint-empty-headline-with-tags (ast)
1041   (org-element-map ast '(headline inlinetask)
1042     (lambda (h)
1043       (let ((title (org-element-property :raw-value h)))
1044         (and (string-match-p "\\`:[[:alnum:]_@#%:]+:\\'" title)
1045              (list (org-element-property :begin h)
1046                    (format "Headline containing only tags is ambiguous: %S"
1047                            title)))))))
1048
1049 \f
1050 ;;; Reports UI
1051
1052 (defvar org-lint--report-mode-map
1053   (let ((map (make-sparse-keymap)))
1054     (set-keymap-parent map tabulated-list-mode-map)
1055     (define-key map (kbd "RET") 'org-lint--jump-to-source)
1056     (define-key map (kbd "TAB") 'org-lint--show-source)
1057     (define-key map (kbd "C-j") 'org-lint--show-source)
1058     (define-key map (kbd "h") 'org-lint--hide-checker)
1059     (define-key map (kbd "i") 'org-lint--ignore-checker)
1060     map)
1061   "Local keymap for `org-lint--report-mode' buffers.")
1062
1063 (define-derived-mode org-lint--report-mode tabulated-list-mode "OrgLint"
1064   "Major mode used to display reports emitted during linting.
1065 \\{org-lint--report-mode-map}"
1066   (setf tabulated-list-format
1067         `[("Line" 6
1068            (lambda (a b)
1069              (< (string-to-number (aref (cadr a) 0))
1070                 (string-to-number (aref (cadr b) 0))))
1071            :right-align t)
1072           ("Trust" 5 t)
1073           ("Warning" 0 t)])
1074   (tabulated-list-init-header))
1075
1076 (defun org-lint--generate-reports (buffer checkers)
1077   "Generate linting report for BUFFER.
1078
1079 CHECKERS is the list of checkers used.
1080
1081 Return an alist (ID [LINE TRUST DESCRIPTION CHECKER]), suitable
1082 for `tabulated-list-printer'."
1083   (with-current-buffer buffer
1084     (save-excursion
1085       (goto-char (point-min))
1086       (let ((ast (org-element-parse-buffer))
1087             (id 0)
1088             (last-line 1)
1089             (last-pos 1))
1090         ;; Insert unique ID for each report.  Replace buffer positions
1091         ;; with line numbers.
1092         (mapcar
1093          (lambda (report)
1094            (list
1095             (cl-incf id)
1096             (apply #'vector
1097                    (cons
1098                     (progn
1099                       (goto-char (car report))
1100                       (beginning-of-line)
1101                       (prog1 (number-to-string
1102                               (cl-incf last-line
1103                                        (count-lines last-pos (point))))
1104                         (setf last-pos (point))))
1105                     (cdr report)))))
1106          ;; Insert trust level in generated reports.  Also sort them
1107          ;; by buffer position in order to optimize lines computation.
1108          (sort (cl-mapcan
1109                 (lambda (c)
1110                   (let ((trust (symbol-name (org-lint-checker-trust c))))
1111                     (mapcar
1112                      (lambda (report)
1113                        (list (car report) trust (nth 1 report) c))
1114                      (save-excursion
1115                        (funcall
1116                         (intern (format "org-lint-%s"
1117                                         (org-lint-checker-name c)))
1118                         ast)))))
1119                 checkers)
1120                #'car-less-than-car))))))
1121
1122 (defvar-local org-lint--source-buffer nil
1123   "Source buffer associated to current report buffer.")
1124
1125 (defvar-local org-lint--local-checkers nil
1126   "List of checkers used to build current report.")
1127
1128 (defun org-lint--refresh-reports ()
1129   (setq tabulated-list-entries
1130         (org-lint--generate-reports org-lint--source-buffer
1131                                     org-lint--local-checkers))
1132   (tabulated-list-print))
1133
1134 (defun org-lint--current-line ()
1135   "Return current report line, as a number."
1136   (string-to-number (aref (tabulated-list-get-entry) 0)))
1137
1138 (defun org-lint--current-checker (&optional entry)
1139   "Return current report checker.
1140 When optional argument ENTRY is non-nil, use this entry instead
1141 of current one."
1142   (aref (if entry (nth 1 entry) (tabulated-list-get-entry)) 3))
1143
1144 (defun org-lint--display-reports (source checkers)
1145   "Display linting reports for buffer SOURCE.
1146 CHECKERS is the list of checkers used."
1147   (let ((buffer (get-buffer-create "*Org Lint*")))
1148     (with-current-buffer buffer
1149       (org-lint--report-mode)
1150       (setf org-lint--source-buffer source)
1151       (setf org-lint--local-checkers checkers)
1152       (org-lint--refresh-reports)
1153       (tabulated-list-print)
1154       (add-hook 'tabulated-list-revert-hook #'org-lint--refresh-reports nil t))
1155     (pop-to-buffer buffer)))
1156
1157 (defun org-lint--jump-to-source ()
1158   "Move to source line that generated the report at point."
1159   (interactive)
1160   (let ((l (org-lint--current-line)))
1161     (switch-to-buffer-other-window org-lint--source-buffer)
1162     (org-goto-line l)
1163     (org-show-set-visibility 'local)
1164     (recenter)))
1165
1166 (defun org-lint--show-source ()
1167   "Show source line that generated the report at point."
1168   (interactive)
1169   (let ((buffer (current-buffer)))
1170     (org-lint--jump-to-source)
1171     (switch-to-buffer-other-window buffer)))
1172
1173 (defun org-lint--hide-checker ()
1174   "Hide all reports from checker that generated the report at point."
1175   (interactive)
1176   (let ((c (org-lint--current-checker)))
1177     (setf tabulated-list-entries
1178           (cl-remove-if (lambda (e) (equal c (org-lint--current-checker e)))
1179                          tabulated-list-entries))
1180     (tabulated-list-print)))
1181
1182 (defun org-lint--ignore-checker ()
1183   "Ignore all reports from checker that generated the report at point.
1184 Checker will also be ignored in all subsequent reports."
1185   (interactive)
1186   (setf org-lint--local-checkers
1187         (remove (org-lint--current-checker) org-lint--local-checkers))
1188   (org-lint--hide-checker))
1189
1190 \f
1191 ;;; Public function
1192
1193 ;;;###autoload
1194 (defun org-lint (&optional arg)
1195   "Check current Org buffer for syntax mistakes.
1196
1197 By default, run all checkers.  With a `\\[universal-argument]' prefix ARG, \
1198 select one
1199 category of checkers only.  With a `\\[universal-argument] \
1200 \\[universal-argument]' prefix, run one precise
1201 checker by its name.
1202
1203 ARG can also be a list of checker names, as symbols, to run."
1204   (interactive "P")
1205   (unless (derived-mode-p 'org-mode) (user-error "Not in an Org buffer"))
1206   (when (called-interactively-p 'any)
1207     (message "Org linting process starting..."))
1208   (let ((checkers
1209          (pcase arg
1210            (`nil org-lint--checkers)
1211            (`(4)
1212             (let ((category
1213                    (completing-read
1214                     "Checker category: "
1215                     (mapcar #'org-lint-checker-categories org-lint--checkers)
1216                     nil t)))
1217               (cl-remove-if-not
1218                (lambda (c)
1219                  (assoc-string (org-lint-checker-categories c) category))
1220                org-lint--checkers)))
1221            (`(16)
1222             (list
1223              (let ((name (completing-read
1224                           "Checker name: "
1225                           (mapcar #'org-lint-checker-name org-lint--checkers)
1226                           nil t)))
1227                (catch 'exit
1228                  (dolist (c org-lint--checkers)
1229                    (when (string= (org-lint-checker-name c) name)
1230                      (throw 'exit c)))))))
1231            ((pred consp)
1232             (cl-remove-if-not (lambda (c) (memq (org-lint-checker-name c) arg))
1233                                org-lint--checkers))
1234            (_ (user-error "Invalid argument `%S' for `org-lint'" arg)))))
1235     (if (not (called-interactively-p 'any))
1236         (org-lint--generate-reports (current-buffer) checkers)
1237       (org-lint--display-reports (current-buffer) checkers)
1238       (message "Org linting process completed"))))
1239
1240
1241 (provide 'org-lint)
1242 ;;; org-lint.el ends here