summaryrefslogtreecommitdiff
path: root/guix/build/pull.scm
blob: 4bad88fe42278ee23cddd69adbf13d3c3b7ee573 (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
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013 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 (guix build pull)
  #:use-module (guix build utils)
  #:use-module (system base compile)
  #:use-module (ice-9 ftw)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-11)
  #:use-module (srfi srfi-26)
  #:export (build-guix))

;;; Commentary:
;;;
;;; Helpers for the 'guix pull' command to unpack and build Guix.
;;;
;;; Code:

(define (call-with-process thunk)
  "Run THUNK in a separate process that will return 0 if THUNK terminates
normally, and 1 if an exception is raised."
  (match (primitive-fork)
    (0
     (catch #t
       (lambda ()
         (thunk)
         (primitive-exit 0))
       (lambda (key . args)
         (print-exception (current-error-port) #f key args)
         (primitive-exit 1))))
    (pid
     #t)))

(define* (p-for-each proc lst
                     #:optional (max-processes (current-processor-count)))
  "Invoke PROC for each element of LST in a separate process, using up to
MAX-PROCESSES processes in parallel.  Raise an error if one of the processes
exit with non-zero."
  (define (wait-for-one-process)
    (match (waitpid WAIT_ANY)
      ((_ . status)
       (unless (zero? (status:exit-val status))
         (error "process failed" proc status)))))

  (let loop ((lst   lst)
             (running 0))
    (match lst
      (()
       (or (zero? running)
           (begin
             (wait-for-one-process)
             (loop lst (- running 1)))))
      ((head . tail)
       (if (< running max-processes)
           (begin
             (call-with-process (cut proc head))
             (loop tail (+ running 1)))
           (begin
             (wait-for-one-process)
             (loop lst (- running 1))))))))

(define* (build-guix out tarball
                     #:key tar gzip gcrypt)
  "Build and install Guix in directory OUT using source from TARBALL."
  (setvbuf (current-output-port) _IOLBF)
  (setvbuf (current-error-port) _IOLBF)

  (setenv "PATH" (string-append tar "/bin:" gzip "/bin"))

  (system* "tar" "xvf" tarball)
  (match (scandir "." (lambda (name)
                        (and (not (member name '("." "..")))
                             (file-is-directory? name))))
    ((dir)
     (chdir dir))
    (x
     (error "tarball did not produce a single source directory" x)))

  (format #t "copying and compiling Guix to `~a'...~%" out)

  ;; Copy everything under guix/ and gnu/ plus guix.scm.
  (copy-recursively "guix" (string-append out "/guix"))
  (copy-recursively "gnu" (string-append out "/gnu"))
  (copy-file "guix.scm" (string-append out "/guix.scm"))

  ;; Add a fake (guix config) module to allow the other modules to be
  ;; compiled.  The user's (guix config) is the one that will be used.
  (copy-file "guix/config.scm.in"
             (string-append out "/guix/config.scm"))
  (substitute* (string-append out "/guix/config.scm")
    (("@LIBGCRYPT@")
     (string-append gcrypt "/lib/libgcrypt")))

  ;; Augment the search path so Scheme code can be compiled.
  (set! %load-path (cons out %load-path))
  (set! %load-compiled-path (cons out %load-compiled-path))

  ;; Compile the .scm files.  Do that in independent processes, à la
  ;; 'make -j', to work around <http://bugs.gnu.org/15602> (FIXME).
  ;; This ensures correctness, but is overly conservative and slow.
  ;; The solution initially implemented (and described in the bug
  ;; above) was slightly faster but consumed memory proportional to the
  ;; number of modules, which quickly became unacceptable.
  (p-for-each (lambda (file)
                (let ((go (string-append (string-drop-right file 4)
                                         ".go")))
                  (format (current-error-port)
                          "compiling '~a'...~%" file)
                  (compile-file file
                                #:output-file go
                                #:opts
                                %auto-compilation-options)))

              (filter (cut string-suffix? ".scm" <>)

                      ;; Build guix/*.scm before gnu/*.scm to speed
                      ;; things up.
                      (sort (find-files out "\\.scm")
                            (let ((guix (string-append out "/guix"))
                                  (gnu  (string-append out "/gnu")))
                              (lambda (a b)
                                (or (and (string-prefix? guix a)
                                         (string-prefix? gnu b))
                                    (string<? a b)))))))

  ;; Remove the "fake" (guix config).
  (delete-file (string-append out "/guix/config.scm"))
  (delete-file (string-append out "/guix/config.go"))

  #t)

;;; pull.scm ends here