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233e7676 | 1 | ;;; GNU Guix --- Functional package management for GNU |
e2a903c8 | 2 | ;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org> |
c2868b1e | 3 | ;;; Copyright © 2013 Mark H Weaver <mhw@netris.org> |
7d193ec3 | 4 | ;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org> |
96eaa55f | 5 | ;;; Copyright © 2016, 2017 Alex Kost <alezost@gmail.com> |
fad155d4 | 6 | ;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org> |
6b1891b0 | 7 | ;;; |
233e7676 | 8 | ;;; This file is part of GNU Guix. |
6b1891b0 | 9 | ;;; |
233e7676 | 10 | ;;; GNU Guix is free software; you can redistribute it and/or modify it |
6b1891b0 LC |
11 | ;;; under the terms of the GNU General Public License as published by |
12 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
13 | ;;; your option) any later version. | |
14 | ;;; | |
233e7676 | 15 | ;;; GNU Guix is distributed in the hope that it will be useful, but |
6b1891b0 LC |
16 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;;; GNU General Public License for more details. | |
19 | ;;; | |
20 | ;;; You should have received a copy of the GNU General Public License | |
233e7676 | 21 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. |
6b1891b0 | 22 | |
59a43334 | 23 | (define-module (gnu packages) |
6b1891b0 | 24 | #:use-module (guix packages) |
98eb8cbe | 25 | #:use-module (guix ui) |
800cdeef | 26 | #:use-module (guix utils) |
cd903ef7 | 27 | #:use-module (guix discovery) |
f9704f17 | 28 | #:use-module (guix memoization) |
95cd4971 LC |
29 | #:use-module ((guix build utils) |
30 | #:select ((package-name->name+version | |
5fbdc9a5 LC |
31 | . hyphen-separated-name->name+version) |
32 | mkdir-p)) | |
c08ea55e | 33 | #:autoload (guix profiles) (packages->manifest) |
fe634eaf | 34 | #:use-module (guix describe) |
c2868b1e | 35 | #:use-module (ice-9 vlist) |
dc5669cd | 36 | #:use-module (ice-9 match) |
5fbdc9a5 LC |
37 | #:autoload (ice-9 binary-ports) (put-bytevector) |
38 | #:autoload (system base compile) (compile) | |
6b1891b0 | 39 | #:use-module (srfi srfi-1) |
5e3b388b | 40 | #:use-module (srfi srfi-11) |
6b1891b0 | 41 | #:use-module (srfi srfi-26) |
dbab5150 LC |
42 | #:use-module (srfi srfi-34) |
43 | #:use-module (srfi srfi-35) | |
800cdeef LC |
44 | #:use-module (srfi srfi-39) |
45 | #:export (search-patch | |
25897079 | 46 | search-patches |
96eaa55f | 47 | search-auxiliary-file |
ac5aa288 | 48 | search-bootstrap-binary |
0492f4a2 | 49 | %patch-path |
96eaa55f | 50 | %auxiliary-files-path |
0b3651bc | 51 | %bootstrap-binaries-path |
c107b541 | 52 | %package-module-path |
fe634eaf | 53 | %default-package-module-path |
7d193ec3 | 54 | |
ba326ce4 | 55 | fold-packages |
0ea939fb | 56 | fold-available-packages |
7d193ec3 | 57 | |
dc5669cd | 58 | find-packages-by-name |
ee8099f5 | 59 | find-package-locations |
3f26bfc1 | 60 | find-best-packages-by-name |
7d193ec3 | 61 | |
84189ebc | 62 | specification->package |
c08ea55e | 63 | specification->package+output |
ee8099f5 | 64 | specification->location |
5fbdc9a5 LC |
65 | specifications->manifest |
66 | ||
67 | generate-package-cache)) | |
6b1891b0 LC |
68 | |
69 | ;;; Commentary: | |
70 | ;;; | |
71 | ;;; General utilities for the software distribution---i.e., the modules under | |
59a43334 | 72 | ;;; (gnu packages ...). |
6b1891b0 LC |
73 | ;;; |
74 | ;;; Code: | |
75 | ||
96eaa55f AK |
76 | ;; By default, we store patches, auxiliary files and bootstrap binaries |
77 | ;; alongside Guile modules. This is so that these extra files can be | |
78 | ;; found without requiring a special setup, such as a specific | |
79 | ;; installation directory and an extra environment variable. One | |
80 | ;; advantage of this setup is that everything just works in an | |
81 | ;; auto-compilation setting. | |
a9f60c42 | 82 | |
a9f60c42 | 83 | (define %bootstrap-binaries-path |
ac5aa288 | 84 | (make-parameter |
1ffa7090 | 85 | (map (cut string-append <> "/gnu/packages/bootstrap") |
0b3651bc | 86 | %load-path))) |
ac5aa288 | 87 | |
96eaa55f AK |
88 | (define %auxiliary-files-path |
89 | (make-parameter | |
90 | (map (cut string-append <> "/gnu/packages/aux-files") | |
91 | %load-path))) | |
92 | ||
93 | (define (search-auxiliary-file file-name) | |
94 | "Search the auxiliary FILE-NAME. Return #f if not found." | |
95 | (search-path (%auxiliary-files-path) file-name)) | |
96 | ||
800cdeef | 97 | (define (search-patch file-name) |
dbab5150 LC |
98 | "Search the patch FILE-NAME. Raise an error if not found." |
99 | (or (search-path (%patch-path) file-name) | |
100 | (raise (condition | |
69daee23 | 101 | (&message (message (format #f (G_ "~a: patch not found") |
dbab5150 | 102 | file-name))))))) |
800cdeef | 103 | |
25897079 AK |
104 | (define-syntax-rule (search-patches file-name ...) |
105 | "Return the list of absolute file names corresponding to each | |
106 | FILE-NAME found in %PATCH-PATH." | |
107 | (list (search-patch file-name) ...)) | |
108 | ||
ac5aa288 | 109 | (define (search-bootstrap-binary file-name system) |
dfba5489 LC |
110 | "Search the bootstrap binary FILE-NAME for SYSTEM. Raise an error if not |
111 | found." | |
112 | (or (search-path (%bootstrap-binaries-path) | |
113 | (string-append system "/" file-name)) | |
114 | (raise (condition | |
115 | (&message | |
116 | (message | |
69daee23 | 117 | (format #f (G_ "could not find bootstrap binary '~a' \ |
dfba5489 LC |
118 | for system '~a'") |
119 | file-name system))))))) | |
ac5aa288 | 120 | |
84836a57 | 121 | (define %distro-root-directory |
eaae07ec LC |
122 | ;; Absolute file name of the module hierarchy. Since (gnu packages …) might |
123 | ;; live in a directory different from (guix), try to get the best match. | |
124 | (letrec-syntax ((dirname* (syntax-rules () | |
125 | ((_ file) | |
126 | (dirname file)) | |
127 | ((_ file head tail ...) | |
128 | (dirname (dirname* file tail ...))))) | |
129 | (try (syntax-rules () | |
130 | ((_ (file things ...) rest ...) | |
131 | (match (search-path %load-path file) | |
132 | (#f | |
133 | (try rest ...)) | |
134 | (absolute | |
135 | (dirname* absolute things ...)))) | |
136 | ((_) | |
137 | #f)))) | |
138 | (try ("gnu/packages/base.scm" gnu/ packages/) | |
139 | ("gnu/packages.scm" gnu/) | |
140 | ("guix.scm")))) | |
6b1891b0 | 141 | |
fe634eaf LC |
142 | (define %default-package-module-path |
143 | ;; Default search path for package modules. | |
144 | `((,%distro-root-directory . "gnu/packages"))) | |
145 | ||
5fbdc9a5 LC |
146 | (define (cache-is-authoritative?) |
147 | "Return true if the pre-computed package cache is authoritative. It is not | |
148 | authoritative when entries have been added via GUIX_PACKAGE_PATH or '-L' | |
149 | flags." | |
150 | (equal? (%package-module-path) | |
151 | (append %default-package-module-path | |
152 | (package-path-entries)))) | |
153 | ||
c107b541 LC |
154 | (define %package-module-path |
155 | ;; Search path for package modules. Each item must be either a directory | |
156 | ;; name or a pair whose car is a directory and whose cdr is a sub-directory | |
157 | ;; to narrow the search. | |
8689901f LC |
158 | (let* ((not-colon (char-set-complement (char-set #\:))) |
159 | (environment (string-tokenize (or (getenv "GUIX_PACKAGE_PATH") "") | |
fe634eaf LC |
160 | not-colon)) |
161 | (channels (package-path-entries))) | |
162 | ;; Automatically add channels and items from $GUIX_PACKAGE_PATH to Guile's | |
163 | ;; search path. For historical reasons, $GUIX_PACKAGE_PATH goes to the | |
164 | ;; front; channels go to the back so that they don't override Guix' own | |
165 | ;; modules. | |
166 | (set! %load-path | |
167 | (append environment %load-path channels)) | |
168 | (set! %load-compiled-path | |
169 | (append environment %load-compiled-path channels)) | |
8689901f LC |
170 | |
171 | (make-parameter | |
fe634eaf LC |
172 | (append environment |
173 | %default-package-module-path | |
174 | channels)))) | |
c107b541 | 175 | |
ee06af5b LC |
176 | (define %patch-path |
177 | ;; Define it after '%package-module-path' so that '%load-path' contains user | |
178 | ;; directories, allowing patches in $GUIX_PACKAGE_PATH to be found. | |
179 | (make-parameter | |
180 | (map (lambda (directory) | |
181 | (if (string=? directory %distro-root-directory) | |
182 | (string-append directory "/gnu/packages/patches") | |
183 | directory)) | |
184 | %load-path))) | |
185 | ||
0ea939fb LC |
186 | (define (fold-available-packages proc init) |
187 | "Fold PROC over the list of available packages. For each available package, | |
188 | PROC is called along these lines: | |
189 | ||
190 | (PROC NAME VERSION RESULT | |
191 | #:outputs OUTPUTS | |
192 | #:location LOCATION | |
193 | …) | |
194 | ||
195 | PROC can use #:allow-other-keys to ignore the bits it's not interested in. | |
196 | When a package cache is available, this procedure does not actually load any | |
197 | package module." | |
198 | (define cache | |
199 | (load-package-cache (current-profile))) | |
200 | ||
201 | (if (and cache (cache-is-authoritative?)) | |
202 | (vhash-fold (lambda (name vector result) | |
203 | (match vector | |
204 | (#(name version module symbol outputs | |
205 | supported? deprecated? | |
206 | file line column) | |
207 | (proc name version result | |
208 | #:outputs outputs | |
209 | #:location (and file | |
210 | (location file line column)) | |
211 | #:supported? supported? | |
212 | #:deprecated? deprecated?)))) | |
213 | init | |
214 | cache) | |
215 | (fold-packages (lambda (package result) | |
216 | (proc (package-name package) | |
217 | (package-version package) | |
218 | result | |
219 | #:outputs (package-outputs package) | |
220 | #:location (package-location package) | |
221 | #:supported? | |
222 | (->bool | |
223 | (member (%current-system) | |
224 | (package-supported-systems package))) | |
225 | #:deprecated? | |
226 | (->bool | |
227 | (package-superseded package)))) | |
228 | init))) | |
229 | ||
5c5ae46c LC |
230 | (define* (fold-packages proc init |
231 | #:optional | |
3c0128b0 LC |
232 | (modules (all-modules (%package-module-path) |
233 | #:warn | |
234 | warn-about-load-error)) | |
96dc8f35 | 235 | #:key (select? (negate hidden-package?))) |
5c5ae46c | 236 | "Call (PROC PACKAGE RESULT) for each available package defined in one of |
96dc8f35 LC |
237 | MODULES that matches SELECT?, using INIT as the initial value of RESULT. It |
238 | is guaranteed to never traverse the same package twice." | |
cd903ef7 | 239 | (fold-module-public-variables (lambda (object result) |
96dc8f35 | 240 | (if (and (package? object) (select? object)) |
cd903ef7 LC |
241 | (proc object result) |
242 | result)) | |
243 | init | |
5c5ae46c | 244 | modules)) |
ba326ce4 | 245 | |
5fbdc9a5 LC |
246 | (define %package-cache-file |
247 | ;; Location of the package cache. | |
248 | "/lib/guix/package.cache") | |
249 | ||
250 | (define load-package-cache | |
251 | (mlambda (profile) | |
252 | "Attempt to load the package cache. On success return a vhash keyed by | |
253 | package names. Return #f on failure." | |
254 | (match profile | |
255 | (#f #f) | |
256 | (profile | |
257 | (catch 'system-error | |
258 | (lambda () | |
259 | (define lst | |
260 | (load-compiled (string-append profile %package-cache-file))) | |
261 | (fold (lambda (item vhash) | |
262 | (match item | |
263 | (#(name version module symbol outputs | |
264 | supported? deprecated? | |
265 | file line column) | |
266 | (vhash-cons name item vhash)))) | |
267 | vlist-null | |
268 | lst)) | |
269 | (lambda args | |
270 | (if (= ENOENT (system-error-errno args)) | |
271 | #f | |
272 | (apply throw args)))))))) | |
273 | ||
274 | (define find-packages-by-name/direct ;bypass the cache | |
9ffc1c00 LC |
275 | (let ((packages (delay |
276 | (fold-packages (lambda (p r) | |
277 | (vhash-cons (package-name p) p r)) | |
724311a2 LC |
278 | vlist-null))) |
279 | (version>? (lambda (p1 p2) | |
280 | (version>? (package-version p1) (package-version p2))))) | |
9ffc1c00 LC |
281 | (lambda* (name #:optional version) |
282 | "Return the list of packages with the given NAME. If VERSION is not #f, | |
724311a2 LC |
283 | then only return packages whose version is prefixed by VERSION, sorted in |
284 | decreasing version order." | |
285 | (let ((matching (sort (vhash-fold* cons '() name (force packages)) | |
286 | version>?))) | |
9ffc1c00 LC |
287 | (if version |
288 | (filter (lambda (package) | |
348987d3 | 289 | (version-prefix? version (package-version package))) |
9ffc1c00 LC |
290 | matching) |
291 | matching))))) | |
dc5669cd | 292 | |
5fbdc9a5 LC |
293 | (define (cache-lookup cache name) |
294 | "Lookup package NAME in CACHE. Return a list sorted in increasing version | |
295 | order." | |
296 | (define (package-version<? v1 v2) | |
297 | (version>? (vector-ref v2 1) (vector-ref v1 1))) | |
298 | ||
299 | (sort (vhash-fold* cons '() name cache) | |
300 | package-version<?)) | |
301 | ||
302 | (define* (find-packages-by-name name #:optional version) | |
303 | "Return the list of packages with the given NAME. If VERSION is not #f, | |
304 | then only return packages whose version is prefixed by VERSION, sorted in | |
305 | decreasing version order." | |
306 | (define cache | |
307 | (load-package-cache (current-profile))) | |
308 | ||
309 | (if (and (cache-is-authoritative?) cache) | |
310 | (match (cache-lookup cache name) | |
311 | (#f #f) | |
312 | ((#(_ versions modules symbols _ _ _ _ _ _) ...) | |
313 | (fold (lambda (version* module symbol result) | |
314 | (if (or (not version) | |
315 | (version-prefix? version version*)) | |
316 | (cons (module-ref (resolve-interface module) | |
317 | symbol) | |
318 | result) | |
319 | result)) | |
320 | '() | |
321 | versions modules symbols))) | |
322 | (find-packages-by-name/direct name version))) | |
323 | ||
ee8099f5 LC |
324 | (define* (find-package-locations name #:optional version) |
325 | "Return a list of version/location pairs corresponding to each package | |
326 | matching NAME and VERSION." | |
327 | (define cache | |
328 | (load-package-cache (current-profile))) | |
329 | ||
330 | (if (and cache (cache-is-authoritative?)) | |
331 | (match (cache-lookup cache name) | |
332 | (#f '()) | |
333 | ((#(name versions modules symbols outputs | |
334 | supported? deprecated? | |
335 | files lines columns) ...) | |
336 | (fold (lambda (version* file line column result) | |
337 | (if (and file | |
338 | (or (not version) | |
339 | (version-prefix? version version*))) | |
340 | (alist-cons version* (location file line column) | |
341 | result) | |
342 | result)) | |
343 | '() | |
344 | versions files lines columns))) | |
345 | (map (lambda (package) | |
346 | (cons (package-version package) (package-location package))) | |
347 | (find-packages-by-name/direct name version)))) | |
348 | ||
3f26bfc1 LC |
349 | (define (find-best-packages-by-name name version) |
350 | "If version is #f, return the list of packages named NAME with the highest | |
351 | version numbers; otherwise, return the list of packages named NAME and at | |
352 | VERSION." | |
353 | (if version | |
354 | (find-packages-by-name name version) | |
e2a903c8 LC |
355 | (match (find-packages-by-name name) |
356 | (() | |
357 | '()) | |
358 | ((matches ...) | |
359 | ;; Return the subset of MATCHES with the higher version number. | |
360 | (let ((highest (package-version (first matches)))) | |
361 | (take-while (lambda (p) | |
362 | (string=? (package-version p) highest)) | |
363 | matches)))))) | |
7d193ec3 | 364 | |
5fbdc9a5 LC |
365 | (define (generate-package-cache directory) |
366 | "Generate under DIRECTORY a cache of all the available packages. | |
367 | ||
368 | The primary purpose of the cache is to speed up package lookup by name such | |
369 | that we don't have to traverse and load all the package modules, thereby also | |
370 | reducing the memory footprint." | |
371 | (define cache-file | |
372 | (string-append directory %package-cache-file)) | |
373 | ||
374 | (define (expand-cache module symbol variable result) | |
375 | (match (false-if-exception (variable-ref variable)) | |
376 | ((? package? package) | |
377 | (if (hidden-package? package) | |
378 | result | |
379 | (cons `#(,(package-name package) | |
380 | ,(package-version package) | |
381 | ,(module-name module) | |
382 | ,symbol | |
383 | ,(package-outputs package) | |
384 | ,(->bool (member (%current-system) | |
385 | (package-supported-systems package))) | |
386 | ,(->bool (package-superseded package)) | |
387 | ,@(let ((loc (package-location package))) | |
388 | (if loc | |
389 | `(,(location-file loc) | |
390 | ,(location-line loc) | |
391 | ,(location-column loc)) | |
392 | '(#f #f #f)))) | |
393 | result))) | |
394 | (_ | |
395 | result))) | |
396 | ||
397 | (define exp | |
398 | (fold-module-public-variables* expand-cache '() | |
399 | (all-modules (%package-module-path) | |
400 | #:warn | |
401 | warn-about-load-error))) | |
402 | ||
403 | (mkdir-p (dirname cache-file)) | |
404 | (call-with-output-file cache-file | |
405 | (lambda (port) | |
406 | ;; Store the cache as a '.go' file. This makes loading fast and reduces | |
407 | ;; heap usage since some of the static data is directly mmapped. | |
408 | (put-bytevector port | |
409 | (compile `'(,@exp) | |
410 | #:to 'bytecode | |
411 | #:opts '(#:to-file? #t))))) | |
412 | cache-file) | |
413 | ||
7d193ec3 | 414 | \f |
4ea44419 AK |
415 | (define %sigint-prompt |
416 | ;; The prompt to jump to upon SIGINT. | |
417 | (make-prompt-tag "interruptible")) | |
418 | ||
419 | (define (call-with-sigint-handler thunk handler) | |
420 | "Call THUNK and return its value. Upon SIGINT, call HANDLER with the signal | |
421 | number in the context of the continuation of the call to this function, and | |
422 | return its return value." | |
423 | (call-with-prompt %sigint-prompt | |
424 | (lambda () | |
425 | (sigaction SIGINT | |
426 | (lambda (signum) | |
427 | (sigaction SIGINT SIG_DFL) | |
428 | (abort-to-prompt %sigint-prompt signum))) | |
429 | (dynamic-wind | |
430 | (const #t) | |
431 | thunk | |
432 | (cut sigaction SIGINT SIG_DFL))) | |
433 | (lambda (k signum) | |
434 | (handler signum)))) | |
435 | ||
fad155d4 ML |
436 | \f |
437 | ;;; | |
438 | ;;; Package specification. | |
439 | ;;; | |
440 | ||
e30c2be1 | 441 | (define* (%find-package spec name version) |
fad155d4 ML |
442 | (match (find-best-packages-by-name name version) |
443 | ((pkg . pkg*) | |
444 | (unless (null? pkg*) | |
69daee23 LC |
445 | (warning (G_ "ambiguous package specification `~a'~%") spec) |
446 | (warning (G_ "choosing ~a@~a from ~a~%") | |
d75e8f36 | 447 | (package-name pkg) (package-version pkg) |
fad155d4 | 448 | (location->string (package-location pkg)))) |
01afdab8 LC |
449 | (match (package-superseded pkg) |
450 | ((? package? new) | |
69daee23 | 451 | (info (G_ "package '~a' has been superseded by '~a'~%") |
01afdab8 LC |
452 | (package-name pkg) (package-name new)) |
453 | new) | |
454 | (#f | |
455 | pkg))) | |
e465d9e1 | 456 | (x |
fad155d4 | 457 | (if version |
69daee23 LC |
458 | (leave (G_ "~A: package not found for version ~a~%") name version) |
459 | (leave (G_ "~A: unknown package~%") name))))) | |
fad155d4 | 460 | |
5e3b388b CR |
461 | (define (specification->package spec) |
462 | "Return a package matching SPEC. SPEC may be a package name, or a package | |
1b846da8 | 463 | name followed by an at-sign and a version number. If the version number is not |
5e3b388b | 464 | present, return the preferred newest version." |
fad155d4 ML |
465 | (let-values (((name version) (package-name->name+version spec))) |
466 | (%find-package spec name version))) | |
84189ebc | 467 | |
ee8099f5 LC |
468 | (define (specification->location spec) |
469 | "Return the location of the highest-numbered package matching SPEC, a | |
470 | specification such as \"guile@2\" or \"emacs\"." | |
471 | (let-values (((name version) (package-name->name+version spec))) | |
472 | (match (find-package-locations name version) | |
473 | (() | |
474 | (if version | |
475 | (leave (G_ "~A: package not found for version ~a~%") name version) | |
476 | (leave (G_ "~A: unknown package~%") name))) | |
477 | (lst | |
478 | (let* ((highest (match lst (((version . _) _ ...) version))) | |
479 | (locations (take-while (match-lambda | |
480 | ((version . location) | |
481 | (string=? version highest))) | |
482 | lst))) | |
483 | (match locations | |
484 | (((version . location) . rest) | |
485 | (unless (null? rest) | |
486 | (warning (G_ "ambiguous package specification `~a'~%") spec) | |
487 | (warning (G_ "choosing ~a@~a from ~a~%") | |
488 | name version | |
489 | (location->string location))) | |
490 | location))))))) | |
491 | ||
84189ebc LC |
492 | (define* (specification->package+output spec #:optional (output "out")) |
493 | "Return the package and output specified by SPEC, or #f and #f; SPEC may | |
494 | optionally contain a version number and an output name, as in these examples: | |
495 | ||
496 | guile | |
1b846da8 | 497 | guile@2.0.9 |
84189ebc | 498 | guile:debug |
1b846da8 | 499 | guile@2.0.9:debug |
84189ebc LC |
500 | |
501 | If SPEC does not specify a version number, return the preferred newest | |
502 | version; if SPEC does not specify an output, return OUTPUT." | |
84189ebc LC |
503 | (let-values (((name version sub-drv) |
504 | (package-specification->name+version+output spec output))) | |
fad155d4 ML |
505 | (match (%find-package spec name version) |
506 | (#f | |
507 | (values #f #f)) | |
508 | (package | |
509 | (if (member sub-drv (package-outputs package)) | |
510 | (values package sub-drv) | |
69daee23 | 511 | (leave (G_ "package `~a' lacks output `~a'~%") |
fad155d4 ML |
512 | (package-full-name package) |
513 | sub-drv)))))) | |
c08ea55e LC |
514 | |
515 | (define (specifications->manifest specs) | |
516 | "Given SPECS, a list of specifications such as \"emacs@25.2\" or | |
517 | \"guile:debug\", return a profile manifest." | |
518 | ;; This procedure exists mostly so users of 'guix package -m' don't have to | |
519 | ;; fiddle with multiple-value returns. | |
520 | (packages->manifest | |
521 | (map (compose list specification->package+output) specs))) |