all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
blob 9595e0de0596a4196fe4ed984e2206a9a96ea125 23410 bytes (raw)
name: lisp/ob-tangle.el 	 # note: path name is non-authoritative(*)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
 
;;; ob-tangle.el --- Extract Source Code From Org Files -*- lexical-binding: t; -*-

;; Copyright (C) 2009-2021 Free Software Foundation, Inc.

;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: https://orgmode.org

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Extract the code from source blocks out into raw source-code files.

;;; Code:

(require 'cl-lib)
(require 'org-src)
(require 'org-macs)
(require 'ol)

(declare-function make-directory "files" (dir &optional parents))
(declare-function org-at-heading-p "org" (&optional ignored))
(declare-function org-babel-update-block-body "ob-core" (new-body))
(declare-function org-back-to-heading "org" (&optional invisible-ok))
(declare-function org-before-first-heading-p "org" ())
(declare-function org-element-at-point "org-element" ())
(declare-function org-element-type "org-element" (element))
(declare-function org-heading-components "org" ())
(declare-function org-in-commented-heading-p "org" (&optional no-inheritance))
(declare-function org-in-archived-heading-p "org" (&optional no-inheritance))
(declare-function outline-previous-heading "outline" ())

(defcustom org-babel-tangle-lang-exts
  '(("emacs-lisp" . "el")
    ("elisp" . "el"))
  "Alist mapping languages to their file extensions.
The key is the language name, the value is the string that should
be inserted as the extension commonly used to identify files
written in this language.  If no entry is found in this list,
then the name of the language is used."
  :group 'org-babel-tangle
  :version "24.1"
  :type '(repeat
	  (cons
	   (string "Language name")
	   (string "File Extension"))))

(defcustom org-babel-tangle-use-relative-file-links t
  "Use relative path names in links from tangled source back the Org file."
  :group 'org-babel-tangle
  :type 'boolean)

(defcustom org-babel-post-tangle-hook nil
  "Hook run in code files tangled by `org-babel-tangle'."
  :group 'org-babel
  :version "24.1"
  :type 'hook)

(defcustom org-babel-pre-tangle-hook '(save-buffer)
  "Hook run at the beginning of `org-babel-tangle'."
  :group 'org-babel
  :version "24.1"
  :type 'hook)

(defcustom org-babel-tangle-body-hook nil
  "Hook run over the contents of each code block body."
  :group 'org-babel
  :version "24.1"
  :type 'hook)

(defcustom org-babel-tangle-comment-format-beg "[[%link][%source-name]]"
  "Format of inserted comments in tangled code files.
The following format strings can be used to insert special
information into the output using `org-fill-template'.
%start-line --- the line number at the start of the code block
%file --------- the file from which the code block was tangled
%link --------- Org style link to the code block
%source-name -- name of the code block

Upon insertion the formatted comment will be commented out, and
followed by a newline.  To inhibit this post-insertion processing
set the `org-babel-tangle-uncomment-comments' variable to a
non-nil value.

Whether or not comments are inserted during tangling is
controlled by the :comments header argument."
  :group 'org-babel
  :version "24.1"
  :type 'string)

(defcustom org-babel-tangle-comment-format-end "%source-name ends here"
  "Format of inserted comments in tangled code files.
The following format strings can be used to insert special
information into the output using `org-fill-template'.
%start-line --- the line number at the start of the code block
%file --------- the file from which the code block was tangled
%link --------- Org style link to the code block
%source-name -- name of the code block

Upon insertion the formatted comment will be commented out, and
followed by a newline.  To inhibit this post-insertion processing
set the `org-babel-tangle-uncomment-comments' variable to a
non-nil value.

Whether or not comments are inserted during tangling is
controlled by the :comments header argument."
  :group 'org-babel
  :version "24.1"
  :type 'string)

(defcustom org-babel-tangle-uncomment-comments nil
  "Inhibits automatic commenting and addition of trailing newline
of tangle comments.  Use `org-babel-tangle-comment-format-beg'
and `org-babel-tangle-comment-format-end' to customize the format
of tangled comments."
  :group 'org-babel
  :type 'boolean)

(defcustom org-babel-process-comment-text 'org-remove-indentation
  "Function called to process raw Org text collected to be
inserted as comments in tangled source-code files.  The function
should take a single string argument and return a string
result.  The default value is `org-remove-indentation'."
  :group 'org-babel
  :version "24.1"
  :type 'function)

(defun org-babel-find-file-noselect-refresh (file)
  "Find file ensuring that the latest changes on disk are
represented in the file."
  (find-file-noselect file 'nowarn)
  (with-current-buffer (get-file-buffer file)
    (revert-buffer t t t)))

(defmacro org-babel-with-temp-filebuffer (file &rest body)
  "Open FILE into a temporary buffer execute BODY there like
`progn', then kill the FILE buffer returning the result of
evaluating BODY."
  (declare (indent 1) (debug t))
  (let ((temp-path (make-symbol "temp-path"))
	(temp-result (make-symbol "temp-result"))
	(temp-file (make-symbol "temp-file"))
	(visited-p (make-symbol "visited-p")))
    `(let* ((,temp-path ,file)
	    (,visited-p (get-file-buffer ,temp-path))
	    ,temp-result ,temp-file)
       (org-babel-find-file-noselect-refresh ,temp-path)
       (setf ,temp-file (get-file-buffer ,temp-path))
       (with-current-buffer ,temp-file
	 (setf ,temp-result (progn ,@body)))
       (unless ,visited-p (kill-buffer ,temp-file))
       ,temp-result)))

;;;###autoload
(defun org-babel-tangle-file (file &optional target-file lang-re)
  "Extract the bodies of source code blocks in FILE.
Source code blocks are extracted with `org-babel-tangle'.
Optional argument TARGET-FILE can be used to specify a default
export file for all source blocks.  Optional argument LANG-RE can
be used to limit the exported source code blocks by languages
matching a regular expression.  Return a list whose CAR is the
tangled file name."
  (interactive "fFile to tangle: \nP")
  (let ((visited-p (find-buffer-visiting (expand-file-name file)))
	to-be-removed)
    (prog1
	(save-window-excursion
	  (find-file file)
	  (setq to-be-removed (current-buffer))
	  (mapcar #'expand-file-name (org-babel-tangle nil target-file lang-re)))
      (unless visited-p
	(kill-buffer to-be-removed)))))

(defun org-babel-tangle-publish (_ filename pub-dir)
  "Tangle FILENAME and place the results in PUB-DIR."
  (unless (file-exists-p pub-dir)
    (make-directory pub-dir t))
  (setq pub-dir (file-name-as-directory pub-dir))
  (mapc (lambda (el) (copy-file el pub-dir t)) (org-babel-tangle-file filename)))

;;;###autoload
(defun org-babel-tangle (&optional arg target-file lang-re)
  "Write code blocks to source-specific files.
Extract the bodies of all source code blocks from the current
file into their own source-specific files.
With one universal prefix argument, only tangle the block at point.
When two universal prefix arguments, only tangle blocks for the
tangle file of the block at point.
Optional argument TARGET-FILE can be used to specify a default
export file for all source blocks.  Optional argument LANG-RE can
be used to limit the exported source code blocks by languages
matching a regular expression."
  (interactive "P")
  (run-hooks 'org-babel-pre-tangle-hook)
  ;; Possibly Restrict the buffer to the current code block
  (save-restriction
    (save-excursion
      (when (equal arg '(4))
	(let ((head (org-babel-where-is-src-block-head)))
	  (if head
	      (goto-char head)
	    (user-error "Point is not in a source code block"))))
      (let ((block-counter 0)
	    (org-babel-default-header-args
	     (if target-file
		 (org-babel-merge-params org-babel-default-header-args
					 (list (cons :tangle target-file)))
	       org-babel-default-header-args))
	    (tangle-file
	     (when (equal arg '(16))
	       (or (cdr (assq :tangle (nth 2 (org-babel-get-src-block-info 'light))))
		   (user-error "Point is not in a source code block"))))
	    path-collector)
	(mapc ;; map over file-names
	 (lambda (by-fn)
	   (let ((file-name (car by-fn)))
	     (when file-name
               (let ((lspecs (cdr by-fn))
		     (fnd (file-name-directory file-name))
		     modes make-dir she-banged lang)
	         ;; drop source-blocks to file
	         ;; We avoid append-to-file as it does not work with tramp.
	         (with-temp-buffer
		   (mapc
		    (lambda (lspec)
		      (let* ((block-lang (car lspec))
			     (spec (cdr lspec))
			     (get-spec (lambda (name) (cdr (assq name (nth 4 spec)))))
			     (she-bang (let ((sheb (funcall get-spec :shebang)))
				         (when (> (length sheb) 0) sheb)))
			     (tangle-mode (funcall get-spec :tangle-mode)))
		        (unless (string-equal block-lang lang)
			  (setq lang block-lang)
			  (let ((lang-f (org-src-get-lang-mode lang)))
			    (when (fboundp lang-f) (ignore-errors (funcall lang-f)))))
		        ;; if file contains she-bangs, then make it executable
		        (when she-bang
			  (unless tangle-mode (setq tangle-mode #o755)))
		        (when tangle-mode
			  (add-to-list 'modes tangle-mode))
		        ;; Possibly create the parent directories for file.
		        (let ((m (funcall get-spec :mkdirp)))
			  (and m fnd (not (string= m "no"))
			       (setq make-dir t)))
		        ;; Handle :padlines unless first line in file
		        (unless (or (string= "no" (funcall get-spec :padline))
				    (= (point) (point-min)))
			  (insert "\n"))
		        (when (and she-bang (not she-banged))
			  (insert (concat she-bang "\n"))
			  (setq she-banged t))
		        (org-babel-spec-to-string spec)
		        (setq block-counter (+ 1 block-counter))))
		    lspecs)
		   (when make-dir
		     (make-directory fnd 'parents))
                   ;; erase previous file
                   (when (file-exists-p file-name)
                     (delete-file file-name))
		   (write-region nil nil file-name)
		   (mapc (lambda (mode) (set-file-modes file-name mode)) modes)
                   (push file-name path-collector))))))
	 (if (equal arg '(4))
	     (org-babel-tangle-single-block 1 t)
	   (org-babel-tangle-collect-blocks lang-re tangle-file)))
	(message "Tangled %d code block%s from %s" block-counter
		 (if (= block-counter 1) "" "s")
		 (file-name-nondirectory
		  (buffer-file-name
		   (or (buffer-base-buffer) (current-buffer)))))
	;; run `org-babel-post-tangle-hook' in all tangled files
	(when org-babel-post-tangle-hook
	  (mapc
	   (lambda (file)
	     (org-babel-with-temp-filebuffer file
	       (run-hooks 'org-babel-post-tangle-hook)))
	   path-collector))
	path-collector))))

(defun org-babel-tangle-clean ()
  "Remove comments inserted by `org-babel-tangle'.
Call this function inside of a source-code file generated by
`org-babel-tangle' to remove all comments inserted automatically
by `org-babel-tangle'.  Warning, this comment removes any lines
containing constructs which resemble Org file links or noweb
references."
  (interactive)
  (goto-char (point-min))
  (while (or (re-search-forward "\\[\\[file:.*\\]\\[.*\\]\\]" nil t)
             (re-search-forward (org-babel-noweb-wrap) nil t))
    (delete-region (save-excursion (beginning-of-line 1) (point))
                   (save-excursion (end-of-line 1) (forward-char 1) (point)))))

(defun org-babel-spec-to-string (spec)
  "Insert SPEC into the current file.

Insert the source-code specified by SPEC into the current source
code file.  This function uses `comment-region' which assumes
that the appropriate major-mode is set.  SPEC has the form:

  (start-line file link source-name params body comment)"
  (pcase-let*
      ((`(,start ,file ,link ,source ,info ,body ,comment) spec)
       (comments (cdr (assq :comments info)))
       (link? (or (string= comments "both") (string= comments "link")
		  (string= comments "yes") (string= comments "noweb")))
       (link-data `(("start-line" . ,(number-to-string start))
		    ("file" . ,file)
		    ("link" . ,link)
		    ("source-name" . ,source)))
       (insert-comment (lambda (text)
			 (when (and comments
				    (not (string= comments "no"))
				    (org-string-nw-p text))
			   (if org-babel-tangle-uncomment-comments
			       ;; Plain comments: no processing.
			       (insert text)
			     ;; Ensure comments are made to be
			     ;; comments, and add a trailing newline.
			     ;; Also ignore invisible characters when
			     ;; commenting.
			     (comment-region
			      (point)
			      (progn (insert (org-no-properties text))
				     (point)))
			     (end-of-line)
			     (insert "\n"))))))
    (when comment (funcall insert-comment comment))
    (when link?
      (funcall insert-comment
	       (org-fill-template
		org-babel-tangle-comment-format-beg link-data)))
    (insert body "\n")
    (when link?
      (funcall insert-comment
	       (org-fill-template
		org-babel-tangle-comment-format-end link-data)))))

(defun org-babel-effective-tangled-filename (buffer-fn src-lang src-tfile)
  "Return effective tangled filename of a source-code block.
BUFFER-FN is the name of the buffer, SRC-LANG the language of the
block and SRC-TFILE is the value of the :tangle header argument,
as computed by `org-babel-tangle-single-block'."
  (let ((base-name (cond
                    ((string= "yes" src-tfile)
                     ;; Use the buffer name
                     (file-name-sans-extension buffer-fn))
                    ((> (length src-tfile) 0) src-tfile)))
        (ext (or (cdr (assoc src-lang org-babel-tangle-lang-exts)) src-lang)))
    (when base-name
      ;; decide if we want to add ext to base-name
      (if (and ext (string= "yes" src-tfile))
          (concat base-name "." ext) base-name))))

(defun org-babel-tangle-collect-blocks (&optional lang-re tangle-file)
  "Collect source blocks in the current Org file.
Return an association list of language and source-code block
specifications of the form used by `org-babel-spec-to-string'
grouped by tangled file name. Optional argument LANG-RE can be
used to limit the collected source code blocks by languages
matching a regular expression. Optional argument TANGLE-FILE can
be used to limit the collected code blocks by target file."
  (let ((counter 0) last-heading-pos blocks)
    (org-babel-map-src-blocks (buffer-file-name)
      (let ((current-heading-pos
	     (org-with-wide-buffer
	      (org-with-limited-levels (outline-previous-heading)))))
	(if (eq last-heading-pos current-heading-pos) (cl-incf counter)
	  (setq counter 1)
	  (setq last-heading-pos current-heading-pos)))
      (unless (or (org-in-commented-heading-p)
		  (org-in-archived-heading-p))
	(let* ((info (org-babel-get-src-block-info 'light))
	       (src-lang (nth 0 info))
	       (src-tfile (cdr (assq :tangle (nth 2 info)))))
	  (unless (or (string= src-tfile "no")
		      (and tangle-file (not (equal tangle-file src-tfile)))
		      (and lang-re (not (string-match-p lang-re src-lang))))
	    ;; Add the spec for this block to blocks under its tangled
	    ;; file name.
	    (let* ((block (org-babel-tangle-single-block counter))
                   (src-tfile (cdr (assq :tangle (nth 4 block))))
		   (file-name (org-babel-effective-tangled-filename
                               (nth 1 block) src-lang src-tfile))
		   (by-fn (assoc file-name blocks)))
	      (if by-fn (setcdr by-fn (cons (cons src-lang block) (cdr by-fn)))
		(push (cons file-name (list (cons src-lang block))) blocks)))))))
    ;; Ensure blocks are in the correct order.
    (mapcar (lambda (b) (cons (car b) (nreverse (cdr b))))
	    (nreverse blocks))))

(defun org-babel-tangle-single-block (block-counter &optional only-this-block)
  "Collect the tangled source for current block.
Return the list of block attributes needed by
`org-babel-tangle-collect-blocks'.  When ONLY-THIS-BLOCK is
non-nil, return the full association list to be used by
`org-babel-tangle' directly."
  (let* ((info (org-babel-get-src-block-info))
	 (start-line
	  (save-restriction (widen)
			    (+ 1 (line-number-at-pos (point)))))
	 (file (buffer-file-name (buffer-base-buffer)))
	 (src-lang (nth 0 info))
	 (params (nth 2 info))
	 (extra (nth 3 info))
         (coderef (nth 6 info))
	 (cref-regexp (org-src-coderef-regexp coderef))
	 (link (let ((l (org-no-properties (org-store-link nil))))
                 (and (string-match org-link-bracket-re l)
                      (match-string 1 l))))
	 (source-name
	  (or (nth 4 info)
	      (format "%s:%d"
		      (or (ignore-errors (nth 4 (org-heading-components)))
			  "No heading")
		      block-counter)))
	 (expand-cmd (intern (concat "org-babel-expand-body:" src-lang)))
	 (assignments-cmd
	  (intern (concat "org-babel-variable-assignments:" src-lang)))
	 (body
	  ;; Run the tangle-body-hook.
          (let ((body (if (org-babel-noweb-p params :tangle)
			  (org-babel-expand-noweb-references info)
			(nth 1 info))))
	    (with-temp-buffer
	      (insert
	       ;; Expand body in language specific manner.
	       (cond ((assq :no-expand params) body)
		     ((fboundp expand-cmd) (funcall expand-cmd body params))
		     (t
		      (org-babel-expand-body:generic
		       body params (and (fboundp assignments-cmd)
					(funcall assignments-cmd params))))))
	      (when (string-match "-r" extra)
		(goto-char (point-min))
		(while (re-search-forward cref-regexp nil t)
		  (replace-match "")))
	      (run-hooks 'org-babel-tangle-body-hook)
	      (buffer-string))))
	 (comment
	  (when (or (string= "both" (cdr (assq :comments params)))
		    (string= "org" (cdr (assq :comments params))))
	    ;; From the previous heading or code-block end
	    (funcall
	     org-babel-process-comment-text
	     (buffer-substring
	      (max (condition-case nil
		       (save-excursion
			 (org-back-to-heading t) ; Sets match data
			 (match-end 0))
		     (error (point-min)))
		   (save-excursion
		     (if (re-search-backward
			  org-babel-src-block-regexp nil t)
			 (match-end 0)
		       (point-min))))
	      (point)))))
         (src-tfile (cdr (assq :tangle params)))
	 (result
	  (list start-line
		(if org-babel-tangle-use-relative-file-links
		    (file-relative-name file)
		  file)
		(if (and org-babel-tangle-use-relative-file-links
			 (string-match org-link-types-re link)
			 (string= (match-string 1 link) "file")
                         (stringp src-tfile))
		    (concat "file:"
			    (file-relative-name (substring link (match-end 0))
						(file-name-directory
						 src-tfile)))
		  link)
		source-name
		params
		(if org-src-preserve-indentation
		    (org-trim body t)
		  (org-trim (org-remove-indentation body)))
		comment)))
    (if only-this-block
        (let* ((file-name (org-babel-effective-tangled-filename
                           (nth 1 result) src-lang src-tfile)))
          (list (cons file-name (list (cons src-lang result)))))
      result)))

(defun org-babel-tangle-comment-links (&optional info)
  "Return a list of begin and end link comments for the code block at point.
INFO, when non nil, is the source block information, as returned
by `org-babel-get-src-block-info'."
  (let ((link-data (pcase (or info (org-babel-get-src-block-info 'light))
		     (`(,_ ,_ ,_ ,_ ,name ,start ,_)
		      `(("start-line" . ,(org-with-point-at start
					   (number-to-string
					    (line-number-at-pos))))
			("file" . ,(buffer-file-name))
			("link" . ,(org-no-properties (org-store-link nil)))
			("source-name" . ,name))))))
    (list (org-fill-template org-babel-tangle-comment-format-beg link-data)
	  (org-fill-template org-babel-tangle-comment-format-end link-data))))

;; de-tangling functions
(defun org-babel-detangle (&optional source-code-file)
  "Propagate changes in source file back original to Org file.
This requires that code blocks were tangled with link comments
which enable the original code blocks to be found."
  (interactive)
  (save-excursion
    (when source-code-file (find-file source-code-file))
    (goto-char (point-min))
    (let ((counter 0) new-body end)
      (while (re-search-forward org-link-bracket-re nil t)
        (if (and (match-string 2)
		 (re-search-forward
		  (concat " " (regexp-quote (match-string 2)) " ends here") nil t))
	    (progn (setq end (match-end 0))
		   (forward-line -1)
		   (save-excursion
		     (when (setq new-body (org-babel-tangle-jump-to-org))
		       (org-babel-update-block-body new-body)))
		   (setq counter (+ 1 counter)))
	  (setq end (point)))
        (goto-char end))
      (prog1 counter (message "Detangled %d code blocks" counter)))))

(defun org-babel-tangle-jump-to-org ()
  "Jump from a tangled code file to the related Org mode file."
  (interactive)
  (let ((mid (point))
	start body-start end target-buffer target-char link block-name body)
    (save-window-excursion
      (save-excursion
	(while (and (re-search-backward org-link-bracket-re nil t)
		    (not ; ever wider searches until matching block comments
		     (and (setq start (line-beginning-position))
			  (setq body-start (line-beginning-position 2))
			  (setq link (match-string 0))
			  (setq block-name (match-string 2))
			  (save-excursion
			    (save-match-data
			      (re-search-forward
			       (concat " " (regexp-quote block-name)
				       " ends here")
			       nil t)
			      (setq end (line-beginning-position))))))))
	(unless (and start (< start mid) (< mid end))
	  (error "Not in tangled code"))
        (setq body (buffer-substring body-start end)))
      ;; Go to the beginning of the relative block in Org file.
      (org-link-open-from-string link)
      (setq target-buffer (current-buffer))
      (if (string-match "[^ \t\n\r]:\\([[:digit:]]+\\)" block-name)
          (let ((n (string-to-number (match-string 1 block-name))))
	    (if (org-before-first-heading-p) (goto-char (point-min))
	      (org-back-to-heading t))
	    ;; Do not skip the first block if it begins at point min.
	    (cond ((or (org-at-heading-p)
		       (not (eq (org-element-type (org-element-at-point))
				'src-block)))
		   (org-babel-next-src-block n))
		  ((= n 1))
		  (t (org-babel-next-src-block (1- n)))))
        (org-babel-goto-named-src-block block-name))
      (goto-char (org-babel-where-is-src-block-head))
      (forward-line 1)
      ;; Try to preserve location of point within the source code in
      ;; tangled code file.
      (let ((offset (- mid body-start)))
	(when (> end (+ offset (point)))
	  (forward-char offset)))
      (setq target-char (point)))
    (org-src-switch-to-buffer target-buffer t)
    (goto-char target-char)
    body))

(provide 'ob-tangle)

;; Local variables:
;; generated-autoload-file: "org-loaddefs.el"
;; End:

;;; ob-tangle.el ends here

debug log:

solving 02379d44e ...
found 02379d44e in https://yhetil.org/emacs/7267271.EvYhyI6sBW@bl4ckspoons/
found 562776ae8 in https://git.savannah.gnu.org/cgit/emacs.git
preparing index
index prepared:
100644 562776ae8ad473cb31e0d7033917a2f09d4e9457	lisp/ob-tangle.el

applying [1/1] https://yhetil.org/emacs/7267271.EvYhyI6sBW@bl4ckspoons/
diff --git a/lisp/ob-tangle.el b/lisp/ob-tangle.el\r
index 562776ae8..02379d44e 100644\r

Checking patch lisp/ob-tangle.el...
Applied patch lisp/ob-tangle.el cleanly.

index at:
100644 9595e0de0596a4196fe4ed984e2206a9a96ea125	lisp/ob-tangle.el

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.