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cc4ecc2d | 1 | ;;; GNU Guix --- Functional package management for GNU |
e87f0591 | 2 | ;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org> |
cc4ecc2d | 3 | ;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org> |
343745c8 | 4 | ;;; Copyright © 2014 Alex Kost <alezost@gmail.com> |
536c3ee4 | 5 | ;;; Copyright © 2015 Mark H Weaver <mhw@netris.org> |
cc4ecc2d LC |
6 | ;;; |
7 | ;;; This file is part of GNU Guix. | |
8 | ;;; | |
9 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
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 | ;;; | |
14 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
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 | |
20 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
21 | ||
22 | (define-module (guix profiles) | |
23 | #:use-module (guix utils) | |
24 | #:use-module (guix records) | |
25 | #:use-module (guix derivations) | |
26 | #:use-module (guix packages) | |
a54c94a4 | 27 | #:use-module (guix gexp) |
79ee406d | 28 | #:use-module (guix monads) |
e87f0591 | 29 | #:use-module (guix store) |
cc4ecc2d LC |
30 | #:use-module (ice-9 match) |
31 | #:use-module (ice-9 regex) | |
32 | #:use-module (ice-9 ftw) | |
343745c8 | 33 | #:use-module (ice-9 format) |
cc4ecc2d LC |
34 | #:use-module (srfi srfi-1) |
35 | #:use-module (srfi srfi-9) | |
79601521 | 36 | #:use-module (srfi srfi-11) |
cc4ecc2d LC |
37 | #:use-module (srfi srfi-19) |
38 | #:use-module (srfi srfi-26) | |
c0c018f1 AK |
39 | #:use-module (srfi srfi-34) |
40 | #:use-module (srfi srfi-35) | |
41 | #:export (&profile-error | |
42 | profile-error? | |
43 | profile-error-profile | |
44 | &profile-not-found-error | |
45 | profile-not-found-error? | |
46 | &missing-generation-error | |
47 | missing-generation-error? | |
48 | missing-generation-error-generation | |
49 | ||
50 | manifest make-manifest | |
cc4ecc2d LC |
51 | manifest? |
52 | manifest-entries | |
53 | ||
54 | <manifest-entry> ; FIXME: eventually make it internal | |
55 | manifest-entry | |
56 | manifest-entry? | |
57 | manifest-entry-name | |
58 | manifest-entry-version | |
59 | manifest-entry-output | |
a54c94a4 | 60 | manifest-entry-item |
cc4ecc2d LC |
61 | manifest-entry-dependencies |
62 | ||
a2078770 LC |
63 | manifest-pattern |
64 | manifest-pattern? | |
65 | ||
cc4ecc2d | 66 | manifest-remove |
f7554030 | 67 | manifest-add |
ef8993e2 | 68 | manifest-lookup |
cc4ecc2d | 69 | manifest-installed? |
a2078770 | 70 | manifest-matching-entries |
cc4ecc2d | 71 | |
343745c8 AK |
72 | manifest-transaction |
73 | manifest-transaction? | |
74 | manifest-transaction-install | |
75 | manifest-transaction-remove | |
76 | manifest-perform-transaction | |
79601521 | 77 | manifest-transaction-effects |
343745c8 | 78 | |
cc4ecc2d | 79 | profile-manifest |
462f5cca | 80 | package->manifest-entry |
cc4ecc2d LC |
81 | profile-derivation |
82 | generation-number | |
83 | generation-numbers | |
f452e8ff | 84 | profile-generations |
3ccde087 | 85 | relative-generation |
cc4ecc2d LC |
86 | previous-generation-number |
87 | generation-time | |
88 | generation-file-name)) | |
89 | ||
90 | ;;; Commentary: | |
91 | ;;; | |
92 | ;;; Tools to create and manipulate profiles---i.e., the representation of a | |
93 | ;;; set of installed packages. | |
94 | ;;; | |
95 | ;;; Code: | |
96 | ||
97 | \f | |
c0c018f1 AK |
98 | ;;; |
99 | ;;; Condition types. | |
100 | ;;; | |
101 | ||
102 | (define-condition-type &profile-error &error | |
103 | profile-error? | |
104 | (profile profile-error-profile)) | |
105 | ||
106 | (define-condition-type &profile-not-found-error &profile-error | |
107 | profile-not-found-error?) | |
108 | ||
109 | (define-condition-type &missing-generation-error &profile-error | |
110 | missing-generation-error? | |
111 | (generation missing-generation-error-generation)) | |
112 | ||
113 | \f | |
cc4ecc2d LC |
114 | ;;; |
115 | ;;; Manifests. | |
116 | ;;; | |
117 | ||
118 | (define-record-type <manifest> | |
119 | (manifest entries) | |
120 | manifest? | |
121 | (entries manifest-entries)) ; list of <manifest-entry> | |
122 | ||
123 | ;; Convenient alias, to avoid name clashes. | |
124 | (define make-manifest manifest) | |
125 | ||
126 | (define-record-type* <manifest-entry> manifest-entry | |
127 | make-manifest-entry | |
128 | manifest-entry? | |
129 | (name manifest-entry-name) ; string | |
130 | (version manifest-entry-version) ; string | |
131 | (output manifest-entry-output ; string | |
132 | (default "out")) | |
a54c94a4 | 133 | (item manifest-entry-item) ; package | store path |
4ca0b410 LC |
134 | (dependencies manifest-entry-dependencies ; (store path | package)* |
135 | (default '()))) | |
cc4ecc2d | 136 | |
a2078770 LC |
137 | (define-record-type* <manifest-pattern> manifest-pattern |
138 | make-manifest-pattern | |
139 | manifest-pattern? | |
140 | (name manifest-pattern-name) ; string | |
141 | (version manifest-pattern-version ; string | #f | |
142 | (default #f)) | |
143 | (output manifest-pattern-output ; string | #f | |
144 | (default "out"))) | |
145 | ||
cc4ecc2d LC |
146 | (define (profile-manifest profile) |
147 | "Return the PROFILE's manifest." | |
148 | (let ((file (string-append profile "/manifest"))) | |
149 | (if (file-exists? file) | |
150 | (call-with-input-file file read-manifest) | |
151 | (manifest '())))) | |
152 | ||
462f5cca LC |
153 | (define* (package->manifest-entry package #:optional output) |
154 | "Return a manifest entry for the OUTPUT of package PACKAGE. When OUTPUT is | |
155 | omitted or #f, use the first output of PACKAGE." | |
156 | (let ((deps (map (match-lambda | |
157 | ((label package) | |
158 | `(,package "out")) | |
159 | ((label package output) | |
160 | `(,package ,output))) | |
161 | (package-transitive-propagated-inputs package)))) | |
162 | (manifest-entry | |
163 | (name (package-name package)) | |
164 | (version (package-version package)) | |
165 | (output (or output (car (package-outputs package)))) | |
166 | (item package) | |
167 | (dependencies (delete-duplicates deps))))) | |
168 | ||
a54c94a4 LC |
169 | (define (manifest->gexp manifest) |
170 | "Return a representation of MANIFEST as a gexp." | |
171 | (define (entry->gexp entry) | |
cc4ecc2d | 172 | (match entry |
a54c94a4 LC |
173 | (($ <manifest-entry> name version output (? string? path) (deps ...)) |
174 | #~(#$name #$version #$output #$path #$deps)) | |
175 | (($ <manifest-entry> name version output (? package? package) (deps ...)) | |
176 | #~(#$name #$version #$output | |
177 | (ungexp package (or output "out")) #$deps)))) | |
cc4ecc2d LC |
178 | |
179 | (match manifest | |
180 | (($ <manifest> (entries ...)) | |
a54c94a4 LC |
181 | #~(manifest (version 1) |
182 | (packages #$(map entry->gexp entries)))))) | |
cc4ecc2d LC |
183 | |
184 | (define (sexp->manifest sexp) | |
185 | "Parse SEXP as a manifest." | |
186 | (match sexp | |
187 | (('manifest ('version 0) | |
188 | ('packages ((name version output path) ...))) | |
189 | (manifest | |
190 | (map (lambda (name version output path) | |
191 | (manifest-entry | |
192 | (name name) | |
193 | (version version) | |
194 | (output output) | |
a54c94a4 | 195 | (item path))) |
cc4ecc2d LC |
196 | name version output path))) |
197 | ||
198 | ;; Version 1 adds a list of propagated inputs to the | |
199 | ;; name/version/output/path tuples. | |
200 | (('manifest ('version 1) | |
201 | ('packages ((name version output path deps) ...))) | |
202 | (manifest | |
203 | (map (lambda (name version output path deps) | |
d34736c5 LC |
204 | ;; Up to Guix 0.7 included, dependencies were listed as ("gmp" |
205 | ;; "/gnu/store/...-gmp") for instance. Discard the 'label' in | |
206 | ;; such lists. | |
207 | (let ((deps (match deps | |
208 | (((labels directories) ...) | |
209 | directories) | |
210 | ((directories ...) | |
211 | directories)))) | |
212 | (manifest-entry | |
213 | (name name) | |
214 | (version version) | |
215 | (output output) | |
216 | (item path) | |
217 | (dependencies deps)))) | |
cc4ecc2d LC |
218 | name version output path deps))) |
219 | ||
220 | (_ | |
221 | (error "unsupported manifest format" manifest)))) | |
222 | ||
223 | (define (read-manifest port) | |
224 | "Return the packages listed in MANIFEST." | |
225 | (sexp->manifest (read port))) | |
226 | ||
a2078770 LC |
227 | (define (entry-predicate pattern) |
228 | "Return a procedure that returns #t when passed a manifest entry that | |
229 | matches NAME/OUTPUT/VERSION. OUTPUT and VERSION may be #f, in which case they | |
230 | are ignored." | |
231 | (match pattern | |
232 | (($ <manifest-pattern> name version output) | |
233 | (match-lambda | |
234 | (($ <manifest-entry> entry-name entry-version entry-output) | |
235 | (and (string=? entry-name name) | |
236 | (or (not entry-output) (not output) | |
237 | (string=? entry-output output)) | |
238 | (or (not version) | |
239 | (string=? entry-version version)))))))) | |
240 | ||
241 | (define (manifest-remove manifest patterns) | |
242 | "Remove entries for each of PATTERNS from MANIFEST. Each item in PATTERNS | |
243 | must be a manifest-pattern." | |
244 | (define (remove-entry pattern lst) | |
245 | (remove (entry-predicate pattern) lst)) | |
246 | ||
247 | (make-manifest (fold remove-entry | |
cc4ecc2d | 248 | (manifest-entries manifest) |
a2078770 | 249 | patterns))) |
cc4ecc2d | 250 | |
f7554030 AK |
251 | (define (manifest-add manifest entries) |
252 | "Add a list of manifest ENTRIES to MANIFEST and return new manifest. | |
253 | Remove MANIFEST entries that have the same name and output as ENTRIES." | |
254 | (define (same-entry? entry name output) | |
255 | (match entry | |
256 | (($ <manifest-entry> entry-name _ entry-output _ ...) | |
257 | (and (equal? name entry-name) | |
258 | (equal? output entry-output))))) | |
259 | ||
260 | (make-manifest | |
261 | (append entries | |
262 | (fold (lambda (entry result) | |
263 | (match entry | |
264 | (($ <manifest-entry> name _ out _ ...) | |
265 | (filter (negate (cut same-entry? <> name out)) | |
266 | result)))) | |
267 | (manifest-entries manifest) | |
268 | entries)))) | |
269 | ||
ef8993e2 LC |
270 | (define (manifest-lookup manifest pattern) |
271 | "Return the first item of MANIFEST that matches PATTERN, or #f if there is | |
272 | no match.." | |
273 | (find (entry-predicate pattern) | |
274 | (manifest-entries manifest))) | |
275 | ||
a2078770 LC |
276 | (define (manifest-installed? manifest pattern) |
277 | "Return #t if MANIFEST has an entry matching PATTERN (a manifest-pattern), | |
278 | #f otherwise." | |
ef8993e2 | 279 | (->bool (manifest-lookup manifest pattern))) |
cc4ecc2d | 280 | |
a2078770 LC |
281 | (define (manifest-matching-entries manifest patterns) |
282 | "Return all the entries of MANIFEST that match one of the PATTERNS." | |
283 | (define predicates | |
284 | (map entry-predicate patterns)) | |
285 | ||
286 | (define (matches? entry) | |
287 | (any (lambda (pred) | |
288 | (pred entry)) | |
289 | predicates)) | |
290 | ||
291 | (filter matches? (manifest-entries manifest))) | |
292 | ||
cc4ecc2d | 293 | \f |
343745c8 AK |
294 | ;;; |
295 | ;;; Manifest transactions. | |
296 | ;;; | |
297 | ||
298 | (define-record-type* <manifest-transaction> manifest-transaction | |
299 | make-manifest-transaction | |
300 | manifest-transaction? | |
301 | (install manifest-transaction-install ; list of <manifest-entry> | |
302 | (default '())) | |
303 | (remove manifest-transaction-remove ; list of <manifest-pattern> | |
304 | (default '()))) | |
305 | ||
79601521 | 306 | (define (manifest-transaction-effects manifest transaction) |
46b23e1a LC |
307 | "Compute the effect of applying TRANSACTION to MANIFEST. Return 4 values: |
308 | the list of packages that would be removed, installed, upgraded, or downgraded | |
309 | when applying TRANSACTION to MANIFEST. Upgrades are represented as pairs | |
310 | where the head is the entry being upgraded and the tail is the entry that will | |
311 | replace it." | |
79601521 LC |
312 | (define (manifest-entry->pattern entry) |
313 | (manifest-pattern | |
314 | (name (manifest-entry-name entry)) | |
315 | (output (manifest-entry-output entry)))) | |
316 | ||
46b23e1a LC |
317 | (let loop ((input (manifest-transaction-install transaction)) |
318 | (install '()) | |
319 | (upgrade '()) | |
320 | (downgrade '())) | |
79601521 LC |
321 | (match input |
322 | (() | |
323 | (let ((remove (manifest-transaction-remove transaction))) | |
324 | (values (manifest-matching-entries manifest remove) | |
46b23e1a | 325 | (reverse install) (reverse upgrade) (reverse downgrade)))) |
79601521 LC |
326 | ((entry rest ...) |
327 | ;; Check whether installing ENTRY corresponds to the installation of a | |
328 | ;; new package or to an upgrade. | |
329 | ||
330 | ;; XXX: When the exact same output directory is installed, we're not | |
331 | ;; really upgrading anything. Add a check for that case. | |
332 | (let* ((pattern (manifest-entry->pattern entry)) | |
46b23e1a LC |
333 | (previous (manifest-lookup manifest pattern)) |
334 | (newer? (and previous | |
3bea13bb LC |
335 | (version>=? (manifest-entry-version entry) |
336 | (manifest-entry-version previous))))) | |
79601521 | 337 | (loop rest |
ef8993e2 | 338 | (if previous install (cons entry install)) |
46b23e1a | 339 | (if (and previous newer?) |
ef8993e2 | 340 | (alist-cons previous entry upgrade) |
46b23e1a LC |
341 | upgrade) |
342 | (if (and previous (not newer?)) | |
343 | (alist-cons previous entry downgrade) | |
344 | downgrade))))))) | |
79601521 | 345 | |
343745c8 AK |
346 | (define (manifest-perform-transaction manifest transaction) |
347 | "Perform TRANSACTION on MANIFEST and return new manifest." | |
348 | (let ((install (manifest-transaction-install transaction)) | |
349 | (remove (manifest-transaction-remove transaction))) | |
350 | (manifest-add (manifest-remove manifest remove) | |
351 | install))) | |
352 | ||
343745c8 | 353 | \f |
cc4ecc2d LC |
354 | ;;; |
355 | ;;; Profiles. | |
356 | ;;; | |
357 | ||
79ee406d LC |
358 | (define (manifest-inputs manifest) |
359 | "Return the list of inputs for MANIFEST. Each input has one of the | |
360 | following forms: | |
361 | ||
362 | (PACKAGE OUTPUT-NAME) | |
363 | ||
364 | or | |
365 | ||
366 | STORE-PATH | |
367 | " | |
368 | (append-map (match-lambda | |
369 | (($ <manifest-entry> name version | |
370 | output (? package? package) deps) | |
371 | `((,package ,output) ,@deps)) | |
372 | (($ <manifest-entry> name version output path deps) | |
373 | ;; Assume PATH and DEPS are already valid. | |
374 | `(,path ,@deps))) | |
375 | (manifest-entries manifest))) | |
376 | ||
377 | (define (info-dir-file manifest) | |
378 | "Return a derivation that builds the 'dir' file for all the entries of | |
379 | MANIFEST." | |
2f0556ae LC |
380 | (define texinfo ;lazy reference |
381 | (module-ref (resolve-interface '(gnu packages texinfo)) 'texinfo)) | |
382 | (define gzip ;lazy reference | |
383 | (module-ref (resolve-interface '(gnu packages compression)) 'gzip)) | |
384 | ||
79ee406d | 385 | (define build |
a54c94a4 | 386 | #~(begin |
79ee406d LC |
387 | (use-modules (guix build utils) |
388 | (srfi srfi-1) (srfi srfi-26) | |
389 | (ice-9 ftw)) | |
390 | ||
391 | (define (info-file? file) | |
392 | (or (string-suffix? ".info" file) | |
393 | (string-suffix? ".info.gz" file))) | |
394 | ||
395 | (define (info-files top) | |
396 | (let ((infodir (string-append top "/share/info"))) | |
397 | (map (cut string-append infodir "/" <>) | |
c2815c0f | 398 | (or (scandir infodir info-file?) '())))) |
79ee406d LC |
399 | |
400 | (define (install-info info) | |
2f0556ae | 401 | (setenv "PATH" (string-append #+gzip "/bin")) ;for info.gz files |
79ee406d LC |
402 | (zero? |
403 | (system* (string-append #+texinfo "/bin/install-info") | |
404 | info (string-append #$output "/share/info/dir")))) | |
405 | ||
406 | (mkdir-p (string-append #$output "/share/info")) | |
407 | (every install-info | |
408 | (append-map info-files | |
409 | '#$(manifest-inputs manifest))))) | |
410 | ||
411 | ;; Don't depend on Texinfo when there's nothing to do. | |
412 | (if (null? (manifest-entries manifest)) | |
413 | (gexp->derivation "info-dir" #~(mkdir #$output)) | |
414 | (gexp->derivation "info-dir" build | |
415 | #:modules '((guix build utils))))) | |
416 | ||
536c3ee4 MW |
417 | (define (ca-certificate-bundle manifest) |
418 | "Return a derivation that builds a single-file bundle containing the CA | |
419 | certificates in the /etc/ssl/certs sub-directories of the packages in | |
420 | MANIFEST. Single-file bundles are required by programs such as Git and Lynx." | |
421 | ;; See <http://lists.gnu.org/archive/html/guix-devel/2015-02/msg00429.html> | |
422 | ;; for a discussion. | |
423 | ||
424 | (define glibc-utf8-locales ;lazy reference | |
425 | (module-ref (resolve-interface '(gnu packages base)) 'glibc-utf8-locales)) | |
426 | ||
427 | (define build | |
428 | #~(begin | |
429 | (use-modules (guix build utils) | |
430 | (rnrs io ports) | |
431 | (srfi srfi-1) | |
432 | (srfi srfi-26) | |
433 | (ice-9 ftw)) | |
434 | ||
435 | (define (pem-file? file) | |
436 | (string-suffix? ".pem" file)) | |
437 | ||
438 | (define (ca-files top) | |
439 | (let ((cert-dir (string-append top "/etc/ssl/certs"))) | |
440 | (map (cut string-append cert-dir "/" <>) | |
441 | (or (scandir cert-dir pem-file?) '())))) | |
442 | ||
443 | (define (concatenate-files files result) | |
444 | "Make RESULT the concatenation of all of FILES." | |
445 | (define (dump file port) | |
446 | (display (call-with-input-file file get-string-all) | |
447 | port) | |
448 | (newline port)) ;required, see <https://bugs.debian.org/635570> | |
449 | ||
450 | (call-with-output-file result | |
451 | (lambda (port) | |
452 | (for-each (cut dump <> port) files)))) | |
453 | ||
454 | ;; Some file names in the NSS certificates are UTF-8 encoded so | |
455 | ;; install a UTF-8 locale. | |
456 | (setenv "LOCPATH" (string-append #+glibc-utf8-locales "/lib/locale")) | |
457 | (setlocale LC_ALL "en_US.UTF-8") | |
458 | ||
459 | (let ((ca-files (append-map ca-files | |
460 | '#$(manifest-inputs manifest))) | |
461 | (result (string-append #$output "/etc/ssl/certs"))) | |
462 | (mkdir-p result) | |
463 | (concatenate-files ca-files | |
464 | (string-append result | |
465 | "/ca-certificates.crt"))))) | |
466 | ||
6d0b9d03 LC |
467 | ;; Don't depend on 'glibc-utf8-locales' and its dependencies when there's |
468 | ;; nothing to do. | |
469 | (if (null? (manifest-entries manifest)) | |
470 | (gexp->derivation "ca-certificate-bundle" #~(mkdir #$output)) | |
471 | (gexp->derivation "ca-certificate-bundle" build | |
472 | #:modules '((guix build utils)) | |
473 | #:local-build? #t))) | |
536c3ee4 MW |
474 | |
475 | (define* (profile-derivation manifest | |
476 | #:key | |
477 | (info-dir? #t) | |
478 | (ca-certificate-bundle? #t)) | |
79ee406d | 479 | "Return a derivation that builds a profile (aka. 'user environment') with |
536c3ee4 MW |
480 | the given MANIFEST. The profile includes a top-level Info 'dir' file unless |
481 | INFO-DIR? is #f, and a single-file CA certificate bundle unless | |
482 | CA-CERTIFICATE-BUNDLE? is #f." | |
79ee406d LC |
483 | (mlet %store-monad ((info-dir (if info-dir? |
484 | (info-dir-file manifest) | |
536c3ee4 MW |
485 | (return #f))) |
486 | (ca-cert-bundle (if ca-certificate-bundle? | |
487 | (ca-certificate-bundle manifest) | |
488 | (return #f)))) | |
79ee406d | 489 | (define inputs |
536c3ee4 MW |
490 | ;; XXX: Here we use tuples of the form (DIR "out") just so that the list |
491 | ;; is unambiguous for the gexp code when MANIFEST has a single input | |
492 | ;; denoted as a string (the pattern (DRV STRING) is normally | |
493 | ;; interpreted in a gexp as "the STRING output of DRV".). See | |
494 | ;; <http://lists.gnu.org/archive/html/guix-devel/2014-12/msg00292.html>. | |
495 | (append (if info-dir | |
496 | `((,info-dir "out")) | |
497 | '()) | |
498 | (if ca-cert-bundle | |
499 | `((,ca-cert-bundle "out")) | |
500 | '()) | |
501 | (manifest-inputs manifest))) | |
79ee406d LC |
502 | |
503 | (define builder | |
504 | #~(begin | |
505 | (use-modules (ice-9 pretty-print) | |
506 | (guix build union)) | |
507 | ||
508 | (setvbuf (current-output-port) _IOLBF) | |
509 | (setvbuf (current-error-port) _IOLBF) | |
510 | ||
511 | (union-build #$output '#$inputs | |
512 | #:log-port (%make-void-port "w")) | |
513 | (call-with-output-file (string-append #$output "/manifest") | |
514 | (lambda (p) | |
515 | (pretty-print '#$(manifest->gexp manifest) p))))) | |
516 | ||
517 | (gexp->derivation "profile" builder | |
518 | #:modules '((guix build union)) | |
519 | #:local-build? #t))) | |
cc4ecc2d LC |
520 | |
521 | (define (profile-regexp profile) | |
522 | "Return a regular expression that matches PROFILE's name and number." | |
523 | (make-regexp (string-append "^" (regexp-quote (basename profile)) | |
524 | "-([0-9]+)"))) | |
525 | ||
526 | (define (generation-number profile) | |
527 | "Return PROFILE's number or 0. An absolute file name must be used." | |
528 | (or (and=> (false-if-exception (regexp-exec (profile-regexp profile) | |
529 | (basename (readlink profile)))) | |
530 | (compose string->number (cut match:substring <> 1))) | |
531 | 0)) | |
532 | ||
533 | (define (generation-numbers profile) | |
534 | "Return the sorted list of generation numbers of PROFILE, or '(0) if no | |
535 | former profiles were found." | |
536 | (define* (scandir name #:optional (select? (const #t)) | |
537 | (entry<? (@ (ice-9 i18n) string-locale<?))) | |
538 | ;; XXX: Bug-fix version introduced in Guile v2.0.6-62-g139ce19. | |
539 | (define (enter? dir stat result) | |
540 | (and stat (string=? dir name))) | |
541 | ||
542 | (define (visit basename result) | |
543 | (if (select? basename) | |
544 | (cons basename result) | |
545 | result)) | |
546 | ||
547 | (define (leaf name stat result) | |
548 | (and result | |
549 | (visit (basename name) result))) | |
550 | ||
551 | (define (down name stat result) | |
552 | (visit "." '())) | |
553 | ||
554 | (define (up name stat result) | |
555 | (visit ".." result)) | |
556 | ||
557 | (define (skip name stat result) | |
558 | ;; All the sub-directories are skipped. | |
559 | (visit (basename name) result)) | |
560 | ||
561 | (define (error name* stat errno result) | |
562 | (if (string=? name name*) ; top-level NAME is unreadable | |
563 | result | |
564 | (visit (basename name*) result))) | |
565 | ||
566 | (and=> (file-system-fold enter? leaf down up skip error #f name lstat) | |
567 | (lambda (files) | |
568 | (sort files entry<?)))) | |
569 | ||
570 | (match (scandir (dirname profile) | |
571 | (cute regexp-exec (profile-regexp profile) <>)) | |
572 | (#f ; no profile directory | |
573 | '(0)) | |
574 | (() ; no profiles | |
575 | '(0)) | |
576 | ((profiles ...) ; former profiles around | |
577 | (sort (map (compose string->number | |
578 | (cut match:substring <> 1) | |
579 | (cute regexp-exec (profile-regexp profile) <>)) | |
580 | profiles) | |
581 | <)))) | |
582 | ||
f452e8ff AK |
583 | (define (profile-generations profile) |
584 | "Return a list of PROFILE's generations." | |
585 | (let ((generations (generation-numbers profile))) | |
586 | (if (equal? generations '(0)) | |
587 | '() | |
588 | generations))) | |
589 | ||
3ccde087 AK |
590 | (define* (relative-generation profile shift #:optional |
591 | (current (generation-number profile))) | |
592 | "Return PROFILE's generation shifted from the CURRENT generation by SHIFT. | |
593 | SHIFT is a positive or negative number. | |
594 | Return #f if there is no such generation." | |
595 | (let* ((abs-shift (abs shift)) | |
596 | (numbers (profile-generations profile)) | |
597 | (from-current (memq current | |
598 | (if (negative? shift) | |
599 | (reverse numbers) | |
600 | numbers)))) | |
601 | (and from-current | |
602 | (< abs-shift (length from-current)) | |
603 | (list-ref from-current abs-shift)))) | |
604 | ||
605 | (define* (previous-generation-number profile #:optional | |
606 | (number (generation-number profile))) | |
cc4ecc2d LC |
607 | "Return the number of the generation before generation NUMBER of |
608 | PROFILE, or 0 if none exists. It could be NUMBER - 1, but it's not the | |
609 | case when generations have been deleted (there are \"holes\")." | |
3ccde087 AK |
610 | (or (relative-generation profile -1 number) |
611 | 0)) | |
cc4ecc2d LC |
612 | |
613 | (define (generation-file-name profile generation) | |
614 | "Return the file name for PROFILE's GENERATION." | |
615 | (format #f "~a-~a-link" profile generation)) | |
616 | ||
617 | (define (generation-time profile number) | |
618 | "Return the creation time of a generation in the UTC format." | |
619 | (make-time time-utc 0 | |
620 | (stat:ctime (stat (generation-file-name profile number))))) | |
621 | ||
622 | ;;; profiles.scm ends here |