Commit | Line | Data |
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4155e2a9 | 1 | ;;; GNU Guix --- Functional package management for GNU |
fcd75bdb | 2 | ;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org> |
11996d85 | 3 | ;;; Copyright © 2013 Andreas Enge <andreas@enge.fr> |
30db6af1 | 4 | ;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org> |
f4ae827e | 5 | ;;; Copyright © 2015 Mark H Weaver <mhw@netris.org> |
c36db98c | 6 | ;;; |
4155e2a9 | 7 | ;;; This file is part of GNU Guix. |
c36db98c | 8 | ;;; |
4155e2a9 | 9 | ;;; GNU Guix is free software; you can redistribute it and/or modify it |
c36db98c LC |
10 | ;;; under the terms of the GNU General Public License as published by |
11 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
12 | ;;; your option) any later version. | |
13 | ;;; | |
4155e2a9 | 14 | ;;; GNU Guix is distributed in the hope that it will be useful, but |
c36db98c LC |
15 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;;; GNU General Public License for more details. | |
18 | ;;; | |
19 | ;;; You should have received a copy of the GNU General Public License | |
4155e2a9 | 20 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. |
c36db98c LC |
21 | |
22 | (define-module (guix build utils) | |
23 | #:use-module (srfi srfi-1) | |
b0e0d0e9 | 24 | #:use-module (srfi srfi-11) |
8c578a60 | 25 | #:use-module (srfi srfi-26) |
251e8b2e | 26 | #:use-module (srfi srfi-60) |
c0746cc9 | 27 | #:use-module (ice-9 ftw) |
b0e0d0e9 LC |
28 | #:use-module (ice-9 match) |
29 | #:use-module (ice-9 regex) | |
30 | #:use-module (ice-9 rdelim) | |
c041886d | 31 | #:use-module (ice-9 format) |
ebe2f31f LC |
32 | #:use-module (rnrs bytevectors) |
33 | #:use-module (rnrs io ports) | |
d475b259 LC |
34 | #:re-export (alist-cons |
35 | alist-delete) | |
8be3b8a3 | 36 | #:export (%store-directory |
dacd5d2c | 37 | store-file-name? |
b7c7c03e | 38 | strip-store-file-name |
8c578a60 | 39 | package-name->name+version |
e6039b9c LC |
40 | parallel-job-count |
41 | ||
8be3b8a3 | 42 | directory-exists? |
d0084152 | 43 | executable-file? |
9741aca9 | 44 | symbolic-link? |
c0895112 | 45 | call-with-ascii-input-file |
99533da5 | 46 | elf-file? |
91ee959b | 47 | ar-file? |
95e7be97 LC |
48 | gzip-file? |
49 | reset-gzip-timestamp | |
b0e0d0e9 | 50 | with-directory-excursion |
7da95264 | 51 | mkdir-p |
4cc2ed98 | 52 | install-file |
5a64a791 | 53 | make-file-writable |
c0746cc9 | 54 | copy-recursively |
e65df6a6 | 55 | delete-file-recursively |
1968262a | 56 | file-name-predicate |
4c261f41 LC |
57 | find-files |
58 | ||
bd2fc4d8 | 59 | search-path-as-list |
b0e0d0e9 | 60 | set-path-environment-variable |
ebe2f31f LC |
61 | search-path-as-string->list |
62 | list->search-path-as-string | |
7584f822 LC |
63 | which |
64 | ||
57aff647 | 65 | every* |
b0e0d0e9 LC |
66 | alist-cons-before |
67 | alist-cons-after | |
68 | alist-replace | |
8ddc41e1 | 69 | modify-phases |
57aff647 | 70 | |
dcd72906 | 71 | with-atomic-file-replacement |
10c87717 | 72 | substitute |
ebe2f31f LC |
73 | substitute* |
74 | dump-port | |
bc5bf85f | 75 | set-file-time |
91133c2d | 76 | patch-shebang |
c0895112 | 77 | patch-makefile-SHELL |
4eb01e54 | 78 | patch-/usr/bin/file |
91133c2d | 79 | fold-port-matches |
30db6af1 | 80 | remove-store-references |
251e8b2e LC |
81 | wrap-program |
82 | ||
83 | locale-category->string)) | |
b0e0d0e9 | 84 | |
11996d85 | 85 | |
b0e0d0e9 LC |
86 | ;;; |
87 | ;;; Directories. | |
88 | ;;; | |
c36db98c | 89 | |
8be3b8a3 LC |
90 | (define (%store-directory) |
91 | "Return the directory name of the store." | |
92 | (or (getenv "NIX_STORE") | |
93 | "/gnu/store")) | |
94 | ||
dacd5d2c LC |
95 | (define (store-file-name? file) |
96 | "Return true if FILE is in the store." | |
97 | (string-prefix? (%store-directory) file)) | |
98 | ||
b7c7c03e LC |
99 | (define (strip-store-file-name file) |
100 | "Strip the '/gnu/store' and hash from FILE, a store file name. The result | |
101 | is typically a \"PACKAGE-VERSION\" string." | |
102 | (string-drop file | |
103 | (+ 34 (string-length (%store-directory))))) | |
104 | ||
8c578a60 LC |
105 | (define (package-name->name+version name) |
106 | "Given NAME, a package name like \"foo-0.9.1b\", return two values: | |
107 | \"foo\" and \"0.9.1b\". When the version part is unavailable, NAME and | |
108 | #f are returned. The first hyphen followed by a digit is considered to | |
109 | introduce the version part." | |
110 | ;; See also `DrvName' in Nix. | |
111 | ||
112 | (define number? | |
113 | (cut char-set-contains? char-set:digit <>)) | |
114 | ||
115 | (let loop ((chars (string->list name)) | |
116 | (prefix '())) | |
117 | (match chars | |
118 | (() | |
119 | (values name #f)) | |
120 | ((#\- (? number? n) rest ...) | |
121 | (values (list->string (reverse prefix)) | |
122 | (list->string (cons n rest)))) | |
123 | ((head tail ...) | |
124 | (loop tail (cons head prefix)))))) | |
125 | ||
1d1fa932 LC |
126 | (define parallel-job-count |
127 | ;; Number of processes to be passed next to GNU Make's `-j' argument. | |
128 | (make-parameter | |
129 | (match (getenv "NIX_BUILD_CORES") ;set by the daemon | |
130 | (#f 1) | |
131 | ("0" (current-processor-count)) | |
132 | (x (or (string->number x) 1))))) | |
e6039b9c | 133 | |
c36db98c LC |
134 | (define (directory-exists? dir) |
135 | "Return #t if DIR exists and is a directory." | |
9f55cf8d LC |
136 | (let ((s (stat dir #f))) |
137 | (and s | |
138 | (eq? 'directory (stat:type s))))) | |
c36db98c | 139 | |
d0084152 LC |
140 | (define (executable-file? file) |
141 | "Return #t if FILE exists and is executable." | |
142 | (let ((s (stat file #f))) | |
143 | (and s | |
144 | (not (zero? (logand (stat:mode s) #o100)))))) | |
145 | ||
9741aca9 LC |
146 | (define (symbolic-link? file) |
147 | "Return #t if FILE is a symbolic link (aka. \"symlink\".)" | |
148 | (eq? (stat:type (lstat file)) 'symlink)) | |
149 | ||
c0895112 LC |
150 | (define (call-with-ascii-input-file file proc) |
151 | "Open FILE as an ASCII or binary file, and pass the resulting port to | |
152 | PROC. FILE is closed when PROC's dynamic extent is left. Return the | |
153 | return values of applying PROC to the port." | |
154 | (let ((port (with-fluids ((%default-port-encoding #f)) | |
155 | ;; Use "b" so that `open-file' ignores `coding:' cookies. | |
156 | (open-file file "rb")))) | |
157 | (dynamic-wind | |
158 | (lambda () | |
159 | #t) | |
160 | (lambda () | |
161 | (proc port)) | |
162 | (lambda () | |
163 | (close-input-port port))))) | |
164 | ||
2bbc6db5 LC |
165 | (define (file-header-match header) |
166 | "Return a procedure that returns true when its argument is a file starting | |
167 | with the bytes in HEADER, a bytevector." | |
168 | (define len | |
169 | (bytevector-length header)) | |
99533da5 | 170 | |
2bbc6db5 LC |
171 | (lambda (file) |
172 | "Return true if FILE starts with the right magic bytes." | |
173 | (define (get-header) | |
174 | (call-with-input-file file | |
175 | (lambda (port) | |
176 | (get-bytevector-n port len)) | |
177 | #:binary #t #:guess-encoding #f)) | |
178 | ||
c23d1709 LC |
179 | (catch 'system-error |
180 | (lambda () | |
181 | (equal? (get-header) header)) | |
182 | (lambda args | |
183 | (if (= EISDIR (system-error-errno args)) | |
184 | #f ;FILE is a directory | |
185 | (apply throw args)))))) | |
2bbc6db5 LC |
186 | |
187 | (define %elf-magic-bytes | |
188 | ;; Magic bytes of ELF files. See <elf.h>. | |
189 | (u8-list->bytevector (map char->integer (string->list "\x7FELF")))) | |
190 | ||
191 | (define elf-file? | |
192 | (file-header-match %elf-magic-bytes)) | |
99533da5 | 193 | |
91ee959b LC |
194 | (define %ar-magic-bytes |
195 | ;; Magic bytes of archives created by 'ar'. See <ar.h>. | |
196 | (u8-list->bytevector (map char->integer (string->list "!<arch>\n")))) | |
197 | ||
2bbc6db5 LC |
198 | (define ar-file? |
199 | (file-header-match %ar-magic-bytes)) | |
91ee959b | 200 | |
95e7be97 LC |
201 | (define %gzip-magic-bytes |
202 | ;; Magic bytes of gzip file. Beware, it's a small header so there could be | |
203 | ;; false positives. | |
204 | #vu8(#x1f #x8b)) | |
205 | ||
206 | (define gzip-file? | |
207 | (file-header-match %gzip-magic-bytes)) | |
208 | ||
209 | (define* (reset-gzip-timestamp file #:key (keep-mtime? #t)) | |
210 | "If FILE is a gzip file, reset its embedded timestamp (as with 'gzip | |
211 | --no-name') and return true. Otherwise return #f. When KEEP-MTIME? is true, | |
212 | preserve FILE's modification time." | |
213 | (let ((stat (stat file)) | |
214 | (port (open file O_RDWR))) | |
215 | (dynamic-wind | |
216 | (const #t) | |
217 | (lambda () | |
218 | (and (= 4 (seek port 4 SEEK_SET)) | |
219 | (put-bytevector port #vu8(0 0 0 0)))) | |
220 | (lambda () | |
221 | (close-port port) | |
222 | (set-file-time file stat))))) | |
223 | ||
b0e0d0e9 LC |
224 | (define-syntax-rule (with-directory-excursion dir body ...) |
225 | "Run BODY with DIR as the process's current directory." | |
226 | (let ((init (getcwd))) | |
227 | (dynamic-wind | |
228 | (lambda () | |
229 | (chdir dir)) | |
230 | (lambda () | |
231 | body ...) | |
232 | (lambda () | |
233 | (chdir init))))) | |
234 | ||
7da95264 LC |
235 | (define (mkdir-p dir) |
236 | "Create directory DIR and all its ancestors." | |
237 | (define absolute? | |
238 | (string-prefix? "/" dir)) | |
239 | ||
240 | (define not-slash | |
241 | (char-set-complement (char-set #\/))) | |
242 | ||
243 | (let loop ((components (string-tokenize dir not-slash)) | |
244 | (root (if absolute? | |
245 | "" | |
246 | "."))) | |
247 | (match components | |
248 | ((head tail ...) | |
249 | (let ((path (string-append root "/" head))) | |
250 | (catch 'system-error | |
251 | (lambda () | |
252 | (mkdir path) | |
253 | (loop tail path)) | |
254 | (lambda args | |
255 | (if (= EEXIST (system-error-errno args)) | |
256 | (loop tail path) | |
257 | (apply throw args)))))) | |
258 | (() #t)))) | |
259 | ||
4cc2ed98 LC |
260 | (define (install-file file directory) |
261 | "Create DIRECTORY if it does not exist and copy FILE in there under the same | |
262 | name." | |
263 | (mkdir-p directory) | |
264 | (copy-file file (string-append directory "/" (basename file)))) | |
265 | ||
5a64a791 MB |
266 | (define (make-file-writable file) |
267 | "Make FILE writable for its owner." | |
268 | (let ((stat (lstat file))) ;XXX: symlinks | |
269 | (chmod file (logior #o600 (stat:perms stat))))) | |
270 | ||
c0746cc9 | 271 | (define* (copy-recursively source destination |
12761f48 LC |
272 | #:key |
273 | (log (current-output-port)) | |
8d846470 LC |
274 | (follow-symlinks? #f) |
275 | keep-mtime?) | |
12761f48 | 276 | "Copy SOURCE directory to DESTINATION. Follow symlinks if FOLLOW-SYMLINKS? |
8d846470 LC |
277 | is true; otherwise, just preserve them. When KEEP-MTIME? is true, keep the |
278 | modification time of the files in SOURCE on those of DESTINATION. Write | |
279 | verbose output to the LOG port." | |
c0746cc9 LC |
280 | (define strip-source |
281 | (let ((len (string-length source))) | |
282 | (lambda (file) | |
283 | (substring file len)))) | |
284 | ||
285 | (file-system-fold (const #t) ; enter? | |
286 | (lambda (file stat result) ; leaf | |
287 | (let ((dest (string-append destination | |
288 | (strip-source file)))) | |
289 | (format log "`~a' -> `~a'~%" file dest) | |
12761f48 LC |
290 | (case (stat:type stat) |
291 | ((symlink) | |
292 | (let ((target (readlink file))) | |
293 | (symlink target dest))) | |
294 | (else | |
8d846470 LC |
295 | (copy-file file dest) |
296 | (when keep-mtime? | |
297 | (set-file-time dest stat)))))) | |
c0746cc9 | 298 | (lambda (dir stat result) ; down |
8d846470 LC |
299 | (let ((target (string-append destination |
300 | (strip-source dir)))) | |
301 | (mkdir-p target) | |
302 | (when keep-mtime? | |
303 | (set-file-time target stat)))) | |
c0746cc9 LC |
304 | (lambda (dir stat result) ; up |
305 | result) | |
306 | (const #t) ; skip | |
307 | (lambda (file stat errno result) | |
308 | (format (current-error-port) "i/o error: ~a: ~a~%" | |
309 | file (strerror errno)) | |
310 | #f) | |
311 | #t | |
12761f48 LC |
312 | source |
313 | ||
314 | (if follow-symlinks? | |
315 | stat | |
316 | lstat))) | |
c0746cc9 | 317 | |
d84a7be6 LC |
318 | (define* (delete-file-recursively dir |
319 | #:key follow-mounts?) | |
320 | "Delete DIR recursively, like `rm -rf', without following symlinks. Don't | |
321 | follow mount points either, unless FOLLOW-MOUNTS? is true. Report but ignore | |
322 | errors." | |
323 | (let ((dev (stat:dev (lstat dir)))) | |
324 | (file-system-fold (lambda (dir stat result) ; enter? | |
325 | (or follow-mounts? | |
326 | (= dev (stat:dev stat)))) | |
327 | (lambda (file stat result) ; leaf | |
328 | (delete-file file)) | |
329 | (const #t) ; down | |
330 | (lambda (dir stat result) ; up | |
331 | (rmdir dir)) | |
332 | (const #t) ; skip | |
333 | (lambda (file stat errno result) | |
334 | (format (current-error-port) | |
335 | "warning: failed to delete ~a: ~a~%" | |
336 | file (strerror errno))) | |
337 | #t | |
338 | dir | |
339 | ||
340 | ;; Don't follow symlinks. | |
341 | lstat))) | |
e65df6a6 | 342 | |
1968262a LC |
343 | (define (file-name-predicate regexp) |
344 | "Return a predicate that returns true when passed a file name whose base | |
345 | name matches REGEXP." | |
346 | (let ((file-rx (if (regexp? regexp) | |
347 | regexp | |
348 | (make-regexp regexp)))) | |
349 | (lambda (file stat) | |
350 | (regexp-exec file-rx (basename file))))) | |
351 | ||
347f54ed | 352 | (define* (find-files dir #:optional (pred (const #t)) |
f4ae827e MW |
353 | #:key (stat lstat) |
354 | directories? | |
355 | fail-on-error?) | |
1968262a LC |
356 | "Return the lexicographically sorted list of files under DIR for which PRED |
357 | returns true. PRED is passed two arguments: the absolute file name, and its | |
4ba3a84d LC |
358 | stat buffer; the default predicate always returns true. PRED can also be a |
359 | regular expression, in which case it is equivalent to (file-name-predicate | |
347f54ed | 360 | PRED). STAT is used to obtain file information; using 'lstat' means that |
f4ae827e MW |
361 | symlinks are not followed. If DIRECTORIES? is true, then directories will |
362 | also be included. If FAIL-ON-ERROR? is true, raise an exception upon error." | |
1968262a LC |
363 | (let ((pred (if (procedure? pred) |
364 | pred | |
365 | (file-name-predicate pred)))) | |
366 | ;; Sort the result to get deterministic results. | |
367 | (sort (file-system-fold (const #t) | |
368 | (lambda (file stat result) ; leaf | |
369 | (if (pred file stat) | |
370 | (cons file result) | |
371 | result)) | |
372 | (lambda (dir stat result) ; down | |
f4ae827e MW |
373 | (if (and directories? |
374 | (pred dir stat)) | |
375 | (cons dir result) | |
376 | result)) | |
1968262a LC |
377 | (lambda (dir stat result) ; up |
378 | result) | |
379 | (lambda (file stat result) ; skip | |
380 | result) | |
381 | (lambda (file stat errno result) | |
382 | (format (current-error-port) "find-files: ~a: ~a~%" | |
383 | file (strerror errno)) | |
f4ae827e MW |
384 | (when fail-on-error? |
385 | (error "find-files failed")) | |
1968262a LC |
386 | result) |
387 | '() | |
347f54ed LC |
388 | dir |
389 | stat) | |
1968262a | 390 | string<?))) |
4c261f41 | 391 | |
b0e0d0e9 LC |
392 | \f |
393 | ;;; | |
394 | ;;; Search paths. | |
395 | ;;; | |
396 | ||
6aa47e38 | 397 | (define* (search-path-as-list files input-dirs |
7ec02d37 | 398 | #:key (type 'directory) pattern) |
6aa47e38 LC |
399 | "Return the list of directories among FILES of the given TYPE (a symbol as |
400 | returned by 'stat:type') that exist in INPUT-DIRS. Example: | |
c36db98c LC |
401 | |
402 | (search-path-as-list '(\"share/emacs/site-lisp\" \"share/emacs/24.1\") | |
403 | (list \"/package1\" \"/package2\" \"/package3\")) | |
404 | => (\"/package1/share/emacs/site-lisp\" | |
405 | \"/package3/share/emacs/site-lisp\") | |
406 | ||
7ec02d37 LC |
407 | When PATTERN is true, it is a regular expression denoting file names to look |
408 | for under the directories designated by FILES. For example: | |
409 | ||
410 | (search-path-as-list '(\"xml\") (list docbook-xml docbook-xsl) | |
411 | #:type 'regular | |
412 | #:pattern \"^catalog\\\\.xml$\") | |
413 | => (\"/…/xml/dtd/docbook/catalog.xml\" | |
414 | \"/…/xml/xsl/docbook-xsl-1.78.1/catalog.xml\") | |
c36db98c LC |
415 | " |
416 | (append-map (lambda (input) | |
7ec02d37 LC |
417 | (append-map (lambda (file) |
418 | (let ((file (string-append input "/" file))) | |
7ec02d37 | 419 | (if pattern |
c6e030b2 EB |
420 | (find-files file (lambda (file stat) |
421 | (and stat | |
422 | (eq? type (stat:type stat)) | |
423 | ((file-name-predicate pattern) file stat))) | |
424 | #:stat stat | |
425 | #:directories? #t) | |
7ec02d37 LC |
426 | (let ((stat (stat file #f))) |
427 | (if (and stat (eq? type (stat:type stat))) | |
428 | (list file) | |
429 | '()))))) | |
6aa47e38 | 430 | files)) |
d5b3de6a | 431 | (delete-duplicates input-dirs))) |
c36db98c LC |
432 | |
433 | (define (list->search-path-as-string lst separator) | |
fcd75bdb LC |
434 | (if separator |
435 | (string-join lst separator) | |
436 | (match lst | |
437 | ((head rest ...) head) | |
438 | (() "")))) | |
c36db98c | 439 | |
ebe2f31f | 440 | (define* (search-path-as-string->list path #:optional (separator #\:)) |
fcd75bdb LC |
441 | (if separator |
442 | (string-tokenize path | |
443 | (char-set-complement (char-set separator))) | |
444 | (list path))) | |
ebe2f31f | 445 | |
6aa47e38 LC |
446 | (define* (set-path-environment-variable env-var files input-dirs |
447 | #:key | |
448 | (separator ":") | |
7ec02d37 LC |
449 | (type 'directory) |
450 | pattern) | |
6aa47e38 LC |
451 | "Look for each of FILES of the given TYPE (a symbol as returned by |
452 | 'stat:type') in INPUT-DIRS. Set ENV-VAR to a SEPARATOR-separated path | |
453 | accordingly. Example: | |
c36db98c LC |
454 | |
455 | (set-path-environment-variable \"PKG_CONFIG\" | |
456 | '(\"lib/pkgconfig\") | |
457 | (list package1 package2)) | |
7ec02d37 LC |
458 | |
459 | When PATTERN is not #f, it must be a regular expression (really a string) | |
460 | denoting file names to look for under the directories designated by FILES: | |
461 | ||
462 | (set-path-environment-variable \"XML_CATALOG_FILES\" | |
463 | '(\"xml\") | |
464 | (list docbook-xml docbook-xsl) | |
465 | #:type 'regular | |
466 | #:pattern \"^catalog\\\\.xml$\") | |
c36db98c | 467 | " |
6aa47e38 | 468 | (let* ((path (search-path-as-list files input-dirs |
7ec02d37 LC |
469 | #:type type |
470 | #:pattern pattern)) | |
9d9ef458 | 471 | (value (list->search-path-as-string path separator))) |
b15669f3 LC |
472 | (if (string-null? value) |
473 | (begin | |
474 | ;; Never set ENV-VAR to an empty string because often, the empty | |
475 | ;; string is equivalent to ".". This is the case for | |
476 | ;; GUILE_LOAD_PATH in Guile 2.0, for instance. | |
477 | (unsetenv env-var) | |
478 | (format #t "environment variable `~a' unset~%" env-var)) | |
479 | (begin | |
480 | (setenv env-var value) | |
481 | (format #t "environment variable `~a' set to `~a'~%" | |
482 | env-var value))))) | |
b0e0d0e9 | 483 | |
7584f822 LC |
484 | (define (which program) |
485 | "Return the complete file name for PROGRAM as found in $PATH, or #f if | |
486 | PROGRAM could not be found." | |
487 | (search-path (search-path-as-string->list (getenv "PATH")) | |
488 | program)) | |
489 | ||
b0e0d0e9 LC |
490 | \f |
491 | ;;; | |
492 | ;;; Phases. | |
493 | ;;; | |
494 | ;;; In (guix build gnu-build-system), there are separate phases (configure, | |
495 | ;;; build, test, install). They are represented as a list of name/procedure | |
496 | ;;; pairs. The following procedures make it easy to change the list of | |
497 | ;;; phases. | |
498 | ;;; | |
499 | ||
57aff647 LC |
500 | (define (every* pred lst) |
501 | "This is like 'every', but process all the elements of LST instead of | |
502 | stopping as soon as PRED returns false. This is useful when PRED has side | |
503 | effects, such as displaying warnings or error messages." | |
504 | (let loop ((lst lst) | |
505 | (result #t)) | |
506 | (match lst | |
507 | (() | |
508 | result) | |
509 | ((head . tail) | |
510 | (loop tail (and (pred head) result)))))) | |
511 | ||
b0e0d0e9 LC |
512 | (define* (alist-cons-before reference key value alist |
513 | #:optional (key=? equal?)) | |
514 | "Insert the KEY/VALUE pair before the first occurrence of a pair whose key | |
515 | is REFERENCE in ALIST. Use KEY=? to compare keys." | |
516 | (let-values (((before after) | |
517 | (break (match-lambda | |
518 | ((k . _) | |
519 | (key=? k reference))) | |
520 | alist))) | |
521 | (append before (alist-cons key value after)))) | |
522 | ||
523 | (define* (alist-cons-after reference key value alist | |
524 | #:optional (key=? equal?)) | |
525 | "Insert the KEY/VALUE pair after the first occurrence of a pair whose key | |
526 | is REFERENCE in ALIST. Use KEY=? to compare keys." | |
527 | (let-values (((before after) | |
528 | (break (match-lambda | |
529 | ((k . _) | |
530 | (key=? k reference))) | |
531 | alist))) | |
532 | (match after | |
533 | ((reference after ...) | |
534 | (append before (cons* reference `(,key . ,value) after))) | |
535 | (() | |
536 | (append before `((,key . ,value))))))) | |
537 | ||
538 | (define* (alist-replace key value alist #:optional (key=? equal?)) | |
539 | "Replace the first pair in ALIST whose car is KEY with the KEY/VALUE pair. | |
540 | An error is raised when no such pair exists." | |
541 | (let-values (((before after) | |
542 | (break (match-lambda | |
543 | ((k . _) | |
544 | (key=? k key))) | |
545 | alist))) | |
546 | (match after | |
547 | ((_ after ...) | |
548 | (append before (alist-cons key value after)))))) | |
549 | ||
8ddc41e1 LC |
550 | (define-syntax-rule (modify-phases phases mod-spec ...) |
551 | "Modify PHASES sequentially as per each MOD-SPEC, which may have one of the | |
552 | following forms: | |
553 | ||
554 | (delete <old-phase-name>) | |
555 | (replace <old-phase-name> <new-phase>) | |
556 | (add-before <old-phase-name> <new-phase-name> <new-phase>) | |
557 | (add-after <old-phase-name> <new-phase-name> <new-phase>) | |
558 | ||
7ee5a694 TUBK |
559 | Where every <*-phase-name> is an expression evaluating to a symbol, and |
560 | <new-phase> an expression evaluating to a procedure." | |
8ddc41e1 LC |
561 | (let* ((phases* phases) |
562 | (phases* (%modify-phases phases* mod-spec)) | |
563 | ...) | |
564 | phases*)) | |
565 | ||
566 | (define-syntax %modify-phases | |
567 | (syntax-rules (delete replace add-before add-after) | |
568 | ((_ phases (delete old-phase-name)) | |
f8503e2b | 569 | (alist-delete old-phase-name phases)) |
8ddc41e1 | 570 | ((_ phases (replace old-phase-name new-phase)) |
f8503e2b | 571 | (alist-replace old-phase-name new-phase phases)) |
8ddc41e1 | 572 | ((_ phases (add-before old-phase-name new-phase-name new-phase)) |
f8503e2b | 573 | (alist-cons-before old-phase-name new-phase-name new-phase phases)) |
8ddc41e1 | 574 | ((_ phases (add-after old-phase-name new-phase-name new-phase)) |
f8503e2b | 575 | (alist-cons-after old-phase-name new-phase-name new-phase phases)))) |
8ddc41e1 | 576 | |
b0e0d0e9 LC |
577 | \f |
578 | ;;; | |
579 | ;;; Text substitution (aka. sed). | |
580 | ;;; | |
581 | ||
dcd72906 LC |
582 | (define (with-atomic-file-replacement file proc) |
583 | "Call PROC with two arguments: an input port for FILE, and an output | |
584 | port for the file that is going to replace FILE. Upon success, FILE is | |
585 | atomically replaced by what has been written to the output port, and | |
586 | PROC's result is returned." | |
587 | (let* ((template (string-append file ".XXXXXX")) | |
d9dbab18 LC |
588 | (out (mkstemp! template)) |
589 | (mode (stat:mode (stat file)))) | |
b0e0d0e9 LC |
590 | (with-throw-handler #t |
591 | (lambda () | |
592 | (call-with-input-file file | |
593 | (lambda (in) | |
dcd72906 LC |
594 | (let ((result (proc in out))) |
595 | (close out) | |
596 | (chmod template mode) | |
597 | (rename-file template file) | |
598 | result)))) | |
b0e0d0e9 LC |
599 | (lambda (key . args) |
600 | (false-if-exception (delete-file template)))))) | |
601 | ||
dcd72906 | 602 | (define (substitute file pattern+procs) |
094b2efc TUBK |
603 | "PATTERN+PROCS is a list of regexp/two-argument-procedure pairs. For each |
604 | line of FILE, and for each PATTERN that it matches, call the corresponding | |
605 | PROC as (PROC LINE MATCHES); PROC must return the line that will be written as | |
606 | a substitution of the original line. Be careful about using '$' to match the | |
607 | end of a line; by itself it won't match the terminating newline of a line." | |
dcd72906 LC |
608 | (let ((rx+proc (map (match-lambda |
609 | (((? regexp? pattern) . proc) | |
610 | (cons pattern proc)) | |
611 | ((pattern . proc) | |
612 | (cons (make-regexp pattern regexp/extended) | |
613 | proc))) | |
614 | pattern+procs))) | |
615 | (with-atomic-file-replacement file | |
616 | (lambda (in out) | |
617 | (let loop ((line (read-line in 'concat))) | |
618 | (if (eof-object? line) | |
619 | #t | |
620 | (let ((line (fold (lambda (r+p line) | |
621 | (match r+p | |
622 | ((regexp . proc) | |
623 | (match (list-matches regexp line) | |
624 | ((and m+ (_ _ ...)) | |
625 | (proc line m+)) | |
626 | (_ line))))) | |
627 | line | |
628 | rx+proc))) | |
629 | (display line out) | |
630 | (loop (read-line in 'concat))))))))) | |
631 | ||
10c87717 LC |
632 | |
633 | (define-syntax let-matches | |
634 | ;; Helper macro for `substitute*'. | |
635 | (syntax-rules (_) | |
636 | ((let-matches index match (_ vars ...) body ...) | |
637 | (let-matches (+ 1 index) match (vars ...) | |
638 | body ...)) | |
639 | ((let-matches index match (var vars ...) body ...) | |
640 | (let ((var (match:substring match index))) | |
641 | (let-matches (+ 1 index) match (vars ...) | |
642 | body ...))) | |
643 | ((let-matches index match () body ...) | |
644 | (begin body ...)))) | |
645 | ||
8773648e LC |
646 | (define-syntax substitute* |
647 | (syntax-rules () | |
648 | "Substitute REGEXP in FILE by the string returned by BODY. BODY is | |
10c87717 LC |
649 | evaluated with each MATCH-VAR bound to the corresponding positional regexp |
650 | sub-expression. For example: | |
651 | ||
4fa697e9 | 652 | (substitute* file |
20d83444 LC |
653 | ((\"hello\") |
654 | \"good morning\\n\") | |
655 | ((\"foo([a-z]+)bar(.*)$\" all letters end) | |
656 | (string-append \"baz\" letter end))) | |
4fa697e9 LC |
657 | |
658 | Here, anytime a line of FILE contains \"hello\", it is replaced by \"good | |
659 | morning\". Anytime a line of FILE matches the second regexp, ALL is bound to | |
660 | the complete match, LETTERS is bound to the first sub-expression, and END is | |
661 | bound to the last one. | |
662 | ||
663 | When one of the MATCH-VAR is `_', no variable is bound to the corresponding | |
20d83444 LC |
664 | match substring. |
665 | ||
666 | Alternatively, FILE may be a list of file names, in which case they are | |
094b2efc TUBK |
667 | all subject to the substitutions. |
668 | ||
669 | Be careful about using '$' to match the end of a line; by itself it won't | |
670 | match the terminating newline of a line." | |
8773648e | 671 | ((substitute* file ((regexp match-var ...) body ...) ...) |
20d83444 LC |
672 | (let () |
673 | (define (substitute-one-file file-name) | |
674 | (substitute | |
675 | file-name | |
676 | (list (cons regexp | |
677 | (lambda (l m+) | |
678 | ;; Iterate over matches M+ and return the | |
679 | ;; modified line based on L. | |
680 | (let loop ((m* m+) ; matches | |
681 | (o 0) ; offset in L | |
682 | (r '())) ; result | |
683 | (match m* | |
684 | (() | |
685 | (let ((r (cons (substring l o) r))) | |
686 | (string-concatenate-reverse r))) | |
687 | ((m . rest) | |
688 | (let-matches 0 m (match-var ...) | |
689 | (loop rest | |
690 | (match:end m) | |
691 | (cons* | |
692 | (begin body ...) | |
693 | (substring l o (match:start m)) | |
694 | r)))))))) | |
695 | ...))) | |
696 | ||
697 | (match file | |
698 | ((files (... ...)) | |
699 | (for-each substitute-one-file files)) | |
700 | ((? string? f) | |
701 | (substitute-one-file f))))))) | |
10c87717 | 702 | |
ebe2f31f LC |
703 | \f |
704 | ;;; | |
8be3b8a3 | 705 | ;;; Patching shebangs---e.g., /bin/sh -> /gnu/store/xyz...-bash/bin/sh. |
ebe2f31f LC |
706 | ;;; |
707 | ||
a18b4d08 LC |
708 | (define* (dump-port in out |
709 | #:key (buffer-size 16384) | |
710 | (progress (lambda (t k) (k)))) | |
2c1fb353 LC |
711 | "Read as much data as possible from IN and write it to OUT, using chunks of |
712 | BUFFER-SIZE bytes. Call PROGRESS at the beginning and after each successful | |
713 | transfer of BUFFER-SIZE bytes or less, passing it the total number of bytes | |
714 | transferred and the continuation of the transfer as a thunk." | |
ebe2f31f LC |
715 | (define buffer |
716 | (make-bytevector buffer-size)) | |
717 | ||
2c1fb353 | 718 | (define (loop total bytes) |
ebe2f31f | 719 | (or (eof-object? bytes) |
a18b4d08 | 720 | (let ((total (+ total bytes))) |
ebe2f31f | 721 | (put-bytevector out buffer 0 bytes) |
a18b4d08 LC |
722 | (progress total |
723 | (lambda () | |
724 | (loop total | |
2c1fb353 LC |
725 | (get-bytevector-n! in buffer 0 buffer-size))))))) |
726 | ||
727 | ;; Make sure PROGRESS is called when we start so that it can measure | |
728 | ;; throughput. | |
729 | (progress 0 | |
730 | (lambda () | |
731 | (loop 0 (get-bytevector-n! in buffer 0 buffer-size))))) | |
ebe2f31f | 732 | |
bc5bf85f LC |
733 | (define (set-file-time file stat) |
734 | "Set the atime/mtime of FILE to that specified by STAT." | |
735 | (utime file | |
736 | (stat:atime stat) | |
737 | (stat:mtime stat) | |
738 | (stat:atimensec stat) | |
739 | (stat:mtimensec stat))) | |
740 | ||
ca1e3ad2 LC |
741 | (define (get-char* p) |
742 | ;; We call it `get-char', but that's really a binary version | |
743 | ;; thereof. (The real `get-char' cannot be used here because our | |
744 | ;; bootstrap Guile is hacked to always use UTF-8.) | |
745 | (match (get-u8 p) | |
746 | ((? integer? x) (integer->char x)) | |
747 | (x x))) | |
748 | ||
ebe2f31f | 749 | (define patch-shebang |
11996d85 | 750 | (let ((shebang-rx (make-regexp "^[[:blank:]]*([[:graph:]]+)[[:blank:]]*([[:graph:]]*)(.*)$"))) |
525a59d6 | 751 | (lambda* (file |
bc5bf85f LC |
752 | #:optional |
753 | (path (search-path-as-string->list (getenv "PATH"))) | |
754 | #:key (keep-mtime? #t)) | |
525a59d6 LC |
755 | "Replace the #! interpreter file name in FILE by a valid one found in |
756 | PATH, when FILE actually starts with a shebang. Return #t when FILE was | |
bc5bf85f LC |
757 | patched, #f otherwise. When KEEP-MTIME? is true, the atime/mtime of |
758 | FILE are kept unchanged." | |
ebe2f31f LC |
759 | (define (patch p interpreter rest-of-line) |
760 | (let* ((template (string-append file ".XXXXXX")) | |
761 | (out (mkstemp! template)) | |
bc5bf85f LC |
762 | (st (stat file)) |
763 | (mode (stat:mode st))) | |
ebe2f31f LC |
764 | (with-throw-handler #t |
765 | (lambda () | |
766 | (format out "#!~a~a~%" | |
767 | interpreter rest-of-line) | |
768 | (dump-port p out) | |
769 | (close out) | |
770 | (chmod template mode) | |
771 | (rename-file template file) | |
bc5bf85f LC |
772 | (when keep-mtime? |
773 | (set-file-time file st)) | |
ebe2f31f LC |
774 | #t) |
775 | (lambda (key . args) | |
776 | (format (current-error-port) | |
777 | "patch-shebang: ~a: error: ~a ~s~%" | |
778 | file key args) | |
779 | (false-if-exception (delete-file template)) | |
780 | #f)))) | |
781 | ||
c0895112 LC |
782 | (call-with-ascii-input-file file |
783 | (lambda (p) | |
ca1e3ad2 LC |
784 | (and (eq? #\# (get-char* p)) |
785 | (eq? #\! (get-char* p)) | |
c0895112 LC |
786 | (let ((line (false-if-exception (read-line p)))) |
787 | (and=> (and line (regexp-exec shebang-rx line)) | |
788 | (lambda (m) | |
11996d85 AE |
789 | (let* ((interp (match:substring m 1)) |
790 | (arg1 (match:substring m 2)) | |
791 | (rest (match:substring m 3)) | |
792 | (has-env (string-suffix? "/env" interp)) | |
793 | (cmd (if has-env arg1 (basename interp))) | |
794 | (bin (search-path path cmd))) | |
c0895112 | 795 | (if bin |
11996d85 | 796 | (if (string=? bin interp) |
c0895112 | 797 | #f ; nothing to do |
11996d85 AE |
798 | (if has-env |
799 | (begin | |
800 | (format (current-error-port) | |
801 | "patch-shebang: ~a: changing `~a' to `~a'~%" | |
802 | file (string-append interp " " arg1) bin) | |
803 | (patch p bin rest)) | |
804 | (begin | |
805 | (format (current-error-port) | |
806 | "patch-shebang: ~a: changing `~a' to `~a'~%" | |
807 | file interp bin) | |
808 | (patch p bin | |
ca8def6e AE |
809 | (if (string-null? arg1) |
810 | "" | |
811 | (string-append " " arg1 rest)))))) | |
c0895112 LC |
812 | (begin |
813 | (format (current-error-port) | |
814 | "patch-shebang: ~a: warning: no binary for interpreter `~a' found in $PATH~%" | |
815 | file (basename cmd)) | |
816 | #f)))))))))))) | |
817 | ||
bc5bf85f LC |
818 | (define* (patch-makefile-SHELL file #:key (keep-mtime? #t)) |
819 | "Patch the `SHELL' variable in FILE, which is supposedly a makefile. | |
820 | When KEEP-MTIME? is true, the atime/mtime of FILE are kept unchanged." | |
c0895112 LC |
821 | |
822 | ;; For instance, Gettext-generated po/Makefile.in.in do not honor $SHELL. | |
823 | ||
824 | ;; XXX: Unlike with `patch-shebang', FILE is always touched. | |
825 | ||
826 | (define (find-shell name) | |
5e5deea9 | 827 | (let ((shell (which name))) |
c0895112 LC |
828 | (unless shell |
829 | (format (current-error-port) | |
830 | "patch-makefile-SHELL: warning: no binary for shell `~a' found in $PATH~%" | |
831 | name)) | |
832 | shell)) | |
833 | ||
bc5bf85f | 834 | (let ((st (stat file))) |
dd0a8ef1 LC |
835 | ;; Consider FILE is using an 8-bit encoding to avoid errors. |
836 | (with-fluids ((%default-port-encoding #f)) | |
837 | (substitute* file | |
838 | (("^ *SHELL[[:blank:]]*:?=[[:blank:]]*([[:graph:]]*/)([[:graph:]]+)(.*)$" | |
839 | _ dir shell args) | |
840 | (let* ((old (string-append dir shell)) | |
841 | (new (or (find-shell shell) old))) | |
842 | (unless (string=? new old) | |
843 | (format (current-error-port) | |
844 | "patch-makefile-SHELL: ~a: changing `SHELL' from `~a' to `~a'~%" | |
845 | file old new)) | |
846 | (string-append "SHELL = " new args))))) | |
bc5bf85f LC |
847 | |
848 | (when keep-mtime? | |
849 | (set-file-time file st)))) | |
10c87717 | 850 | |
4eb01e54 LC |
851 | (define* (patch-/usr/bin/file file |
852 | #:key | |
853 | (file-command (which "file")) | |
854 | (keep-mtime? #t)) | |
855 | "Patch occurrences of \"/usr/bin/file\" in FILE, replacing them with | |
856 | FILE-COMMAND. When KEEP-MTIME? is true, keep FILE's modification time | |
857 | unchanged." | |
858 | (if (not file-command) | |
859 | (format (current-error-port) | |
860 | "patch-/usr/bin/file: warning: \ | |
861 | no replacement 'file' command, doing nothing~%") | |
862 | (let ((st (stat file))) | |
dd0a8ef1 LC |
863 | ;; Consider FILE is using an 8-bit encoding to avoid errors. |
864 | (with-fluids ((%default-port-encoding #f)) | |
865 | (substitute* file | |
866 | (("/usr/bin/file") | |
867 | (begin | |
868 | (format (current-error-port) | |
869 | "patch-/usr/bin/file: ~a: changing `~a' to `~a'~%" | |
870 | file "/usr/bin/file" file-command) | |
871 | file-command)))) | |
4eb01e54 LC |
872 | |
873 | (when keep-mtime? | |
874 | (set-file-time file st))))) | |
875 | ||
91133c2d LC |
876 | (define* (fold-port-matches proc init pattern port |
877 | #:optional (unmatched (lambda (_ r) r))) | |
878 | "Read from PORT character-by-character; for each match against | |
879 | PATTERN, call (PROC MATCH RESULT), where RESULT is seeded with INIT. | |
880 | PATTERN is a list of SRFI-14 char-sets. Call (UNMATCHED CHAR RESULT) | |
881 | for each unmatched character." | |
882 | (define initial-pattern | |
883 | ;; The poor developer's regexp. | |
884 | (if (string? pattern) | |
885 | (map char-set (string->list pattern)) | |
886 | pattern)) | |
887 | ||
888 | ;; Note: we're not really striving for performance here... | |
889 | (let loop ((chars '()) | |
890 | (pattern initial-pattern) | |
891 | (matched '()) | |
892 | (result init)) | |
893 | (cond ((null? chars) | |
ca1e3ad2 | 894 | (loop (list (get-char* port)) |
91133c2d LC |
895 | pattern |
896 | matched | |
897 | result)) | |
898 | ((null? pattern) | |
899 | (loop chars | |
900 | initial-pattern | |
901 | '() | |
902 | (proc (list->string (reverse matched)) result))) | |
903 | ((eof-object? (car chars)) | |
904 | (fold-right unmatched result matched)) | |
905 | ((char-set-contains? (car pattern) (car chars)) | |
906 | (loop (cdr chars) | |
907 | (cdr pattern) | |
908 | (cons (car chars) matched) | |
909 | result)) | |
910 | ((null? matched) ; common case | |
911 | (loop (cdr chars) | |
912 | pattern | |
913 | matched | |
914 | (unmatched (car chars) result))) | |
915 | (else | |
916 | (let ((matched (reverse matched))) | |
917 | (loop (append (cdr matched) chars) | |
918 | initial-pattern | |
919 | '() | |
920 | (unmatched (car matched) result))))))) | |
921 | ||
922 | (define* (remove-store-references file | |
8be3b8a3 | 923 | #:optional (store (%store-directory))) |
91133c2d LC |
924 | "Remove from FILE occurrences of file names in STORE; return #t when |
925 | store paths were encountered in FILE, #f otherwise. This procedure is | |
926 | known as `nuke-refs' in Nixpkgs." | |
927 | (define pattern | |
928 | (let ((nix-base32-chars | |
929 | '(#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9 | |
930 | #\a #\b #\c #\d #\f #\g #\h #\i #\j #\k #\l #\m #\n | |
931 | #\p #\q #\r #\s #\v #\w #\x #\y #\z))) | |
932 | `(,@(map char-set (string->list store)) | |
933 | ,(char-set #\/) | |
934 | ,@(make-list 32 (list->char-set nix-base32-chars)) | |
935 | ,(char-set #\-)))) | |
936 | ||
937 | (with-fluids ((%default-port-encoding #f)) | |
938 | (with-atomic-file-replacement file | |
939 | (lambda (in out) | |
940 | ;; We cannot use `regexp-exec' here because it cannot deal with | |
941 | ;; strings containing NUL characters. | |
942 | (format #t "removing store references from `~a'...~%" file) | |
943 | (setvbuf in _IOFBF 65536) | |
944 | (setvbuf out _IOFBF 65536) | |
945 | (fold-port-matches (lambda (match result) | |
93b03575 LC |
946 | (put-bytevector out (string->utf8 store)) |
947 | (put-u8 out (char->integer #\/)) | |
948 | (put-bytevector out | |
949 | (string->utf8 | |
950 | "eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-")) | |
91133c2d LC |
951 | #t) |
952 | #f | |
953 | pattern | |
954 | in | |
955 | (lambda (char result) | |
93b03575 | 956 | (put-u8 out (char->integer char)) |
91133c2d LC |
957 | result)))))) |
958 | ||
30db6af1 | 959 | (define* (wrap-program prog #:rest vars) |
de611138 | 960 | "Make a wrapper for PROG. VARS should look like this: |
30db6af1 NK |
961 | |
962 | '(VARIABLE DELIMITER POSITION LIST-OF-DIRECTORIES) | |
963 | ||
964 | where DELIMITER is optional. ':' will be used if DELIMITER is not given. | |
965 | ||
966 | For example, this command: | |
967 | ||
968 | (wrap-program \"foo\" | |
de611138 EB |
969 | '(\"PATH\" \":\" = (\"/gnu/.../bar/bin\")) |
970 | '(\"CERT_PATH\" suffix (\"/gnu/.../baz/certs\" | |
30db6af1 NK |
971 | \"/qux/certs\"))) |
972 | ||
973 | will copy 'foo' to '.foo-real' and create the file 'foo' with the following | |
974 | contents: | |
975 | ||
976 | #!location/of/bin/bash | |
de611138 EB |
977 | export PATH=\"/gnu/.../bar/bin\" |
978 | export CERT_PATH=\"$CERT_PATH${CERT_PATH:+:}/gnu/.../baz/certs:/qux/certs\" | |
b01f8967 | 979 | exec -a $0 location/of/.foo-real \"$@\" |
30db6af1 NK |
980 | |
981 | This is useful for scripts that expect particular programs to be in $PATH, for | |
982 | programs that expect particular shared libraries to be in $LD_LIBRARY_PATH, or | |
de611138 EB |
983 | modules in $GUILE_LOAD_PATH, etc. |
984 | ||
b14a8385 LC |
985 | If PROG has previously been wrapped by 'wrap-program', the wrapper is extended |
986 | with definitions for VARS." | |
987 | (define wrapped-file | |
988 | (string-append (dirname prog) "/." (basename prog) "-real")) | |
989 | ||
990 | (define already-wrapped? | |
991 | (file-exists? wrapped-file)) | |
992 | ||
993 | (define (last-line port) | |
994 | ;; Return the last line read from PORT and leave PORT's cursor right | |
995 | ;; before it. | |
996 | (let loop ((previous-line-offset 0) | |
997 | (previous-line "") | |
998 | (position (seek port 0 SEEK_CUR))) | |
999 | (match (read-line port 'concat) | |
1000 | ((? eof-object?) | |
1001 | (seek port previous-line-offset SEEK_SET) | |
1002 | previous-line) | |
1003 | ((? string? line) | |
1004 | (loop position line (+ (string-length line) position)))))) | |
1005 | ||
1006 | (define (export-variable lst) | |
1007 | ;; Return a string that exports an environment variable. | |
1008 | (match lst | |
1009 | ((var sep '= rest) | |
1010 | (format #f "export ~a=\"~a\"" | |
1011 | var (string-join rest sep))) | |
1012 | ((var sep 'prefix rest) | |
1013 | (format #f "export ~a=\"~a${~a~a+~a}$~a\"" | |
1014 | var (string-join rest sep) var sep sep var)) | |
1015 | ((var sep 'suffix rest) | |
1016 | (format #f "export ~a=\"$~a${~a~a+~a}~a\"" | |
1017 | var var var sep sep (string-join rest sep))) | |
1018 | ((var '= rest) | |
1019 | (format #f "export ~a=\"~a\"" | |
1020 | var (string-join rest ":"))) | |
1021 | ((var 'prefix rest) | |
1022 | (format #f "export ~a=\"~a${~a:+:}$~a\"" | |
1023 | var (string-join rest ":") var var)) | |
1024 | ((var 'suffix rest) | |
1025 | (format #f "export ~a=\"$~a${~a:+:}~a\"" | |
1026 | var var var (string-join rest ":"))))) | |
1027 | ||
1028 | (if already-wrapped? | |
1029 | ||
1030 | ;; PROG is already a wrapper: add the new "export VAR=VALUE" lines just | |
1031 | ;; before the last line. | |
1032 | (let* ((port (open-file prog "r+")) | |
1033 | (last (last-line port))) | |
1034 | (for-each (lambda (var) | |
1035 | (display (export-variable var) port) | |
1036 | (newline port)) | |
1037 | vars) | |
1038 | (display last port) | |
1039 | (close-port port)) | |
1040 | ||
1041 | ;; PROG is not wrapped yet: create a shell script that sets VARS. | |
1042 | (let ((prog-tmp (string-append wrapped-file "-tmp"))) | |
1043 | (link prog wrapped-file) | |
1044 | ||
1045 | (call-with-output-file prog-tmp | |
1046 | (lambda (port) | |
1047 | (format port | |
1048 | "#!~a~%~a~%exec -a \"$0\" \"~a\" \"$@\"~%" | |
1049 | (which "bash") | |
1050 | (string-join (map export-variable vars) "\n") | |
1051 | (canonicalize-path wrapped-file)))) | |
1052 | ||
1053 | (chmod prog-tmp #o755) | |
1054 | (rename-file prog-tmp prog)))) | |
30db6af1 | 1055 | |
251e8b2e LC |
1056 | \f |
1057 | ;;; | |
1058 | ;;; Locales. | |
1059 | ;;; | |
1060 | ||
1061 | (define (locale-category->string category) | |
1062 | "Return the name of locale category CATEGORY, one of the 'LC_' constants. | |
1063 | If CATEGORY is a bitwise or of several 'LC_' constants, an approximation is | |
1064 | returned." | |
1065 | (letrec-syntax ((convert (syntax-rules () | |
1066 | ((_) | |
1067 | (number->string category)) | |
1068 | ((_ first rest ...) | |
1069 | (if (= first category) | |
1070 | (symbol->string 'first) | |
1071 | (convert rest ...)))))) | |
1072 | (convert LC_ADDRESS LC_ALL LC_COLLATE LC_CTYPE | |
1073 | LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES LC_MONETARY | |
1074 | LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE | |
1075 | LC_TIME))) | |
1076 | ||
b0e0d0e9 LC |
1077 | ;;; Local Variables: |
1078 | ;;; eval: (put 'call-with-output-file/atomic 'scheme-indent-function 1) | |
99533da5 | 1079 | ;;; eval: (put 'call-with-ascii-input-file 'scheme-indent-function 1) |
b0e0d0e9 | 1080 | ;;; eval: (put 'with-throw-handler 'scheme-indent-function 1) |
8197c978 | 1081 | ;;; eval: (put 'let-matches 'scheme-indent-function 3) |
dcd72906 | 1082 | ;;; eval: (put 'with-atomic-file-replacement 'scheme-indent-function 1) |
b0e0d0e9 | 1083 | ;;; End: |