aboutsummaryrefslogtreecommitdiff
path: root/build-aux/build-self.scm
blob: bccb7a959e9c9cd43663fc43ed5d853a27fdef8b (about) (plain)
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
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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 Guix 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 Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (build-self)
  #:use-module (gnu)
  #:use-module (guix)
  #:use-module (guix ui)
  #:use-module (guix config)
  #:use-module (guix modules)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-19)
  #:use-module (rnrs io ports)
  #:use-module (ice-9 match)
  #:use-module (ice-9 popen)
  #:export (build))

;;; Commentary:
;;;
;;; When loaded, this module returns a monadic procedure of at least one
;;; argument: the source tree to build.  It returns a derivation that
;;; builds it.
;;;
;;; This file uses modules provided by the already-installed Guix.  Those
;;; modules may be arbitrarily old compared to the version we want to
;;; build.  Because of that, it must rely on the smallest set of features
;;; that are likely to be provided by the (guix) and (gnu) modules, and by
;;; Guile itself, forever and ever.
;;;
;;; Code:


;;;
;;; Generating (guix config).
;;;
;;; This is copied from (guix self) because we cannot assume (guix self) is
;;; available at this point.
;;;

(define %dependency-variables
  ;; (guix config) variables corresponding to dependencies.
  '(%libgcrypt %libz %xz %gzip %bzip2 %nix-instantiate))

(define %persona-variables
  ;; (guix config) variables that define Guix's persona.
  '(%guix-package-name
    %guix-version
    %guix-bug-report-address
    %guix-home-page-url))

(define %config-variables
  ;; (guix config) variables corresponding to Guix configuration (storedir,
  ;; localstatedir, etc.)
  (sort (filter pair?
                (module-map (lambda (name var)
                              (and (not (memq name %dependency-variables))
                                   (not (memq name %persona-variables))
                                   (cons name (variable-ref var))))
                            (resolve-interface '(guix config))))
        (lambda (name+value1 name+value2)
          (string<? (symbol->string (car name+value1))
                    (symbol->string (car name+value2))))))

(define* (make-config.scm #:key libgcrypt zlib gzip xz bzip2
                          (package-name "GNU Guix")
                          (package-version "0")
                          (bug-report-address "bug-guix@gnu.org")
                          (home-page-url "https://gnu.org/s/guix"))

  ;; Hack so that Geiser is not confused.
  (define defmod 'define-module)

  (scheme-file "config.scm"
               #~(begin
                   (#$defmod (guix config)
                     #:export (%guix-package-name
                               %guix-version
                               %guix-bug-report-address
                               %guix-home-page-url
                               %libgcrypt
                               %libz
                               %gzip
                               %bzip2
                               %xz
                               %nix-instantiate))

                   ;; XXX: Work around <http://bugs.gnu.org/15602>.
                   (eval-when (expand load eval)
                     #$@(map (match-lambda
                               ((name . value)
                                #~(define-public #$name #$value)))
                             %config-variables)

                     (define %guix-package-name #$package-name)
                     (define %guix-version #$package-version)
                     (define %guix-bug-report-address #$bug-report-address)
                     (define %guix-home-page-url #$home-page-url)

                     (define %gzip
                       #+(and gzip (file-append gzip "/bin/gzip")))
                     (define %bzip2
                       #+(and bzip2 (file-append bzip2 "/bin/bzip2")))
                     (define %xz
                       #+(and xz (file-append xz "/bin/xz")))

                     (define %libgcrypt
                       #+(and libgcrypt
                              (file-append libgcrypt "/lib/libgcrypt")))
                     (define %libz
                       #+(and zlib
                              (file-append zlib "/lib/libz")))

                     (define %nix-instantiate     ;for (guix import snix)
                       "nix-instantiate")))))


;;;
;;; 'gexp->script'.
;;;
;;; This is our own variant of 'gexp->script' with an extra #:module-path
;;; parameter, which was unavailable in (guix gexp) until commit
;;; 1ae16033f34cebe802023922436883867010850f (March 2018.)
;;;

(define (load-path-expression modules path)
  "Return as a monadic value a gexp that sets '%load-path' and
'%load-compiled-path' to point to MODULES, a list of module names.  MODULES
are searched for in PATH."
  (mlet %store-monad ((modules  (imported-modules modules
                                                  #:module-path path))
                      (compiled (compiled-modules modules
                                                  #:module-path path)))
    (return (gexp (eval-when (expand load eval)
                    (set! %load-path
                      (cons (ungexp modules) %load-path))
                    (set! %load-compiled-path
                      (cons (ungexp compiled)
                            %load-compiled-path)))))))

(define* (gexp->script name exp
                       #:key (guile (default-guile))
                       (module-path %load-path))
  "Return an executable script NAME that runs EXP using GUILE, with EXP's
imported modules in its search path."
  (mlet %store-monad ((set-load-path
                       (load-path-expression (gexp-modules exp)
                                             module-path)))
    (gexp->derivation name
                      (gexp
                       (call-with-output-file (ungexp output)
                         (lambda (port)
                           ;; Note: that makes a long shebang.  When the store
                           ;; is /gnu/store, that fits within the 128-byte
                           ;; limit imposed by Linux, but that may go beyond
                           ;; when running tests.
                           (format port
                                   "#!~a/bin/guile --no-auto-compile~%!#~%"
                                   (ungexp guile))

                           (write '(ungexp set-load-path) port)
                           (write '(ungexp exp) port)
                           (chmod port #o555))))
                      #:module-path module-path)))


(define (date-version-string)
  "Return the current date and hour in UTC timezone, for use as a poor
person's version identifier."
  ;; XXX: Replace with a Git commit id.
  (date->string (current-date 0) "~Y~m~d.~H"))

(define* (build-program source version
                        #:optional (guile-version (effective-version)))
  "Return a program that computes the derivation to build Guix from SOURCE."
  (define select?
    ;; Select every module but (guix config) and non-Guix modules.
    (match-lambda
      (('guix 'config) #f)
      (('guix _ ...)   #t)
      (('gnu _ ...)    #t)
      (_               #f)))

  (with-imported-modules `(((guix config)
                            => ,(make-config.scm
                                 #:libgcrypt
                                 (specification->package "libgcrypt")))
                           ,@(source-module-closure `((guix store)
                                                      (guix self)
                                                      (guix derivations)
                                                      (gnu packages bootstrap))
                                                    (list source)
                                                    #:select? select?))
    (gexp->script "compute-guix-derivation"
                  #~(begin
                      (use-modules (ice-9 match))

                      (eval-when (expand load eval)
                        ;; Don't augment '%load-path'.
                        (unsetenv "GUIX_PACKAGE_PATH")

                        ;; (gnu packages …) modules are going to be looked up
                        ;; under SOURCE.  (guix config) is looked up in FRONT.
                        (match %load-path
                          ((#$source _ ...)
                           #t)                    ;already done
                          ((front _ ...)
                           (set! %load-path (list #$source front))))

                        ;; Only load our own modules or those of Guile.
                        (match %load-compiled-path
                          ((front _ ... sys1 sys2)
                           (set! %load-compiled-path
                             (list front sys1 sys2)))))

                      (use-modules (guix store)
                                   (guix self)
                                   (guix derivations)
                                   (srfi srfi-1))

                      (define (spin system)
                        (define spin
                          (circular-list "-" "\\" "|" "/" "-" "\\" "|" "/"))

                        (format (current-error-port)
                                "Computing Guix derivation for '~a'...  "
                                system)
                        (let loop ((spin spin))
                          (display (string-append "\b" (car spin))
                                   (current-error-port))
                          (force-output (current-error-port))
                          (sleep 1)
                          (loop (cdr spin))))

                      (match (command-line)
                        ((_ _ system)
                         (with-store store
                           (call-with-new-thread
                            (lambda ()
                              (spin system)))

                           (display
                            (derivation-file-name
                             (run-with-store store
                               (guix-derivation #$source #$version
                                                #$guile-version)
                               #:system system)))))))
                  #:module-path (list source))))

;; The procedure below is our return value.
(define* (build source
                #:key verbose? (version (date-version-string)) system
                (guile-version (match ((@ (guile) version))
                                 ("2.2.2" "2.2.2")
                                 (_       (effective-version))))
                #:allow-other-keys
                #:rest rest)
  "Return a derivation that unpacks SOURCE into STORE and compiles Scheme
files."
  ;; Build the build program and then use it as a trampoline to build from
  ;; SOURCE.
  (mlet %store-monad ((build  (build-program source version guile-version))
                      (system (if system (return system) (current-system))))
    (mbegin %store-monad
      (show-what-to-build* (list build))
      (built-derivations (list build))
      (let* ((pipe   (begin
                       (setenv "GUILE_WARN_DEPRECATED" "no") ;be quiet and drive
                       (open-pipe* OPEN_READ
                                   (derivation->output-path build)
                                   source system)))
             (str    (get-string-all pipe))
             (status (close-pipe pipe)))
        (match str
          ((? eof-object?)
           (error "build program failed" (list build status)))
          ((? derivation-path? drv)
           (mbegin %store-monad
             (return (newline (current-output-port)))
             ((store-lift add-temp-root) drv)
             (return (read-derivation-from-file drv))))
          ((? string? str)
           (error "invalid build result" (list build str))))))))

;; This file is loaded by 'guix pull'; return it the build procedure.
build

;; Local Variables:
;; eval: (put 'with-load-path 'scheme-indent-function 1)
;; End:

;;; build-self.scm ends here