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5ce3defe | 1 | ;;; GNU Guix --- Functional package management for GNU |
334bda9a | 2 | ;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org> |
5ce3defe LC |
3 | ;;; |
4 | ;;; This file is part of GNU Guix. | |
5 | ;;; | |
6 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
7 | ;;; under the terms of the GNU General Public License as published by | |
8 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
9 | ;;; your option) any later version. | |
10 | ;;; | |
11 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
12 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;;; GNU General Public License for more details. | |
15 | ;;; | |
16 | ;;; You should have received a copy of the GNU General Public License | |
17 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
18 | ||
548f7a8f | 19 | (define-module (gnu build install) |
5ce3defe | 20 | #:use-module (guix build utils) |
9d3fb6c7 | 21 | #:use-module (guix build store-copy) |
b4140694 | 22 | #:use-module (srfi srfi-26) |
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23 | #:use-module (ice-9 match) |
24 | #:export (install-grub | |
b4140694 | 25 | populate-root-file-system |
5ce3defe | 26 | reset-timestamps |
9d3fb6c7 LC |
27 | register-closure |
28 | populate-single-profile-directory)) | |
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29 | |
30 | ;;; Commentary: | |
31 | ;;; | |
32 | ;;; This module supports the installation of the GNU system on a hard disk. | |
33 | ;;; It is meant to be used both in a build environment (in derivations that | |
34 | ;;; build VM images), and on the bare metal (when really installing the | |
35 | ;;; system.) | |
36 | ;;; | |
37 | ;;; Code: | |
38 | ||
39 | (define* (install-grub grub.cfg device mount-point) | |
40 | "Install GRUB with GRUB.CFG on DEVICE, which is assumed to be mounted on | |
6412e58a LC |
41 | MOUNT-POINT. |
42 | ||
43 | Note that the caller must make sure that GRUB.CFG is registered as a GC root | |
44 | so that the fonts, background images, etc. referred to by GRUB.CFG are not | |
45 | GC'd." | |
6ffd11f1 LC |
46 | (let* ((target (string-append mount-point "/boot/grub/grub.cfg")) |
47 | (pivot (string-append target ".new"))) | |
48 | (mkdir-p (dirname target)) | |
49 | ||
6412e58a LC |
50 | ;; Copy GRUB.CFG instead of just symlinking it, because symlinks won't |
51 | ;; work when /boot is on a separate partition. Do that atomically. | |
52 | (copy-file grub.cfg pivot) | |
6ffd11f1 LC |
53 | (rename-file pivot target) |
54 | ||
641f9a2a LC |
55 | (unless (zero? (system* "grub-install" "--no-floppy" |
56 | "--boot-directory" | |
57 | (string-append mount-point "/boot") | |
58 | device)) | |
59 | (error "failed to install GRUB")))) | |
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60 | |
61 | (define (evaluate-populate-directive directive target) | |
62 | "Evaluate DIRECTIVE, an sexp describing a file or directory to create under | |
63 | directory TARGET." | |
b4140694 | 64 | (let loop ((directive directive)) |
a4888e2e LC |
65 | (catch 'system-error |
66 | (lambda () | |
67 | (match directive | |
68 | (('directory name) | |
69 | (mkdir-p (string-append target name))) | |
70 | (('directory name uid gid) | |
71 | (let ((dir (string-append target name))) | |
72 | (mkdir-p dir) | |
73 | (chown dir uid gid))) | |
74 | (('directory name uid gid mode) | |
75 | (loop `(directory ,name ,uid ,gid)) | |
76 | (chmod (string-append target name) mode)) | |
77 | ((new '-> old) | |
78 | (let try () | |
79 | (catch 'system-error | |
80 | (lambda () | |
81 | (symlink old (string-append target new))) | |
82 | (lambda args | |
83 | ;; When doing 'guix system init' on the current '/', some | |
84 | ;; symlinks may already exists. Override them. | |
85 | (if (= EEXIST (system-error-errno args)) | |
86 | (begin | |
87 | (delete-file (string-append target new)) | |
88 | (try)) | |
89 | (apply throw args)))))))) | |
90 | (lambda args | |
91 | ;; Usually we can only get here when installing to an existing root, | |
92 | ;; as with 'guix system init foo.scm /'. | |
93 | (format (current-error-port) | |
94 | "error: failed to evaluate directive: ~s~%" | |
95 | directive) | |
96 | (apply throw args))))) | |
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97 | |
98 | (define (directives store) | |
99 | "Return a list of directives to populate the root file system that will host | |
100 | STORE." | |
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101 | `(;; Note: the store's GID is fixed precisely so we can set it here rather |
102 | ;; than at activation time. | |
66c2703f | 103 | (directory ,store 0 30000 #o1775) |
185f6691 | 104 | |
b4140694 | 105 | (directory "/etc") |
171a0a13 | 106 | (directory "/var/log") ; for shepherd |
b4140694 | 107 | (directory "/var/guix/gcroots") |
517830cc | 108 | (directory "/var/empty") ; for no-login accounts |
3485716f | 109 | (directory "/var/db") ; for dhclient, etc. |
4b2615e1 | 110 | (directory "/var/run") |
b4140694 | 111 | (directory "/run") |
3485716f | 112 | (directory "/mnt") |
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113 | (directory "/var/guix/profiles/per-user/root" 0 0) |
114 | ||
115 | ;; Link to the initial system generation. | |
116 | ("/var/guix/profiles/system" -> "system-1-link") | |
117 | ||
b4140694 LC |
118 | ("/var/guix/gcroots/booted-system" -> "/run/booted-system") |
119 | ("/var/guix/gcroots/current-system" -> "/run/current-system") | |
f2c403ea | 120 | |
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121 | ;; XXX: 'guix-register' creates this symlink with a wrong target, so |
122 | ;; create it upfront to be sure. | |
123 | ("/var/guix/gcroots/profiles" -> "/var/guix/profiles") | |
124 | ||
b4140694 | 125 | (directory "/bin") |
b4140694 | 126 | (directory "/tmp" 0 0 #o1777) ; sticky bit |
f73b8e3d | 127 | (directory "/var/tmp" 0 0 #o1777) |
d9c41939 | 128 | (directory "/var/lock" 0 0 #o1777) |
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129 | |
130 | (directory "/root" 0 0) ; an exception | |
131 | (directory "/home" 0 0))) | |
132 | ||
f2c403ea | 133 | (define (populate-root-file-system system target) |
b4140694 | 134 | "Make the essential non-store files and directories on TARGET. This |
f2c403ea | 135 | includes /etc, /var, /run, /bin/sh, etc., and all the symlinks to SYSTEM." |
b4140694 | 136 | (for-each (cut evaluate-populate-directive <> target) |
f2c403ea LC |
137 | (directives (%store-directory))) |
138 | ||
139 | ;; Add system generation 1. | |
aea9b232 LC |
140 | (let ((generation-1 (string-append target |
141 | "/var/guix/profiles/system-1-link"))) | |
142 | (let try () | |
143 | (catch 'system-error | |
144 | (lambda () | |
145 | (symlink system generation-1)) | |
146 | (lambda args | |
147 | ;; If GENERATION-1 already exists, overwrite it. | |
148 | (if (= EEXIST (system-error-errno args)) | |
149 | (begin | |
150 | (delete-file generation-1) | |
151 | (try)) | |
152 | (apply throw args))))))) | |
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153 | |
154 | (define (reset-timestamps directory) | |
155 | "Reset the timestamps of all the files under DIRECTORY, so that they appear | |
156 | as created and modified at the Epoch." | |
157 | (display "clearing file timestamps...\n") | |
158 | (for-each (lambda (file) | |
159 | (let ((s (lstat file))) | |
160 | ;; XXX: Guile uses libc's 'utime' function (not 'futime'), so | |
161 | ;; the timestamp of symlinks cannot be changed, and there are | |
162 | ;; symlinks here pointing to /gnu/store, which is the host, | |
163 | ;; read-only store. | |
164 | (unless (eq? (stat:type s) 'symlink) | |
165 | (utime file 0 0 0 0)))) | |
e1a56158 | 166 | (find-files directory #:directories? #t))) |
5ce3defe | 167 | |
08fa7613 LC |
168 | (define* (register-closure store closure |
169 | #:key (deduplicate? #t)) | |
5ce3defe LC |
170 | "Register CLOSURE in STORE, where STORE is the directory name of the target |
171 | store and CLOSURE is the name of a file containing a reference graph as used | |
08fa7613 LC |
172 | by 'guix-register'. As a side effect, this resets timestamps on store files |
173 | and, if DEDUPLICATE? is true, deduplicates files common to CLOSURE and the | |
174 | rest of STORE." | |
175 | (let ((status (apply system* "guix-register" "--prefix" store | |
176 | (append (if deduplicate? '() '("--no-deduplication")) | |
177 | (list closure))))) | |
5ce3defe LC |
178 | (unless (zero? status) |
179 | (error "failed to register store items" closure)))) | |
180 | ||
9d3fb6c7 | 181 | (define* (populate-single-profile-directory directory |
08fa7613 LC |
182 | #:key profile closure |
183 | deduplicate?) | |
9d3fb6c7 LC |
184 | "Populate DIRECTORY with a store containing PROFILE, whose closure is given |
185 | in the file called CLOSURE (as generated by #:references-graphs.) DIRECTORY | |
186 | is initialized to contain a single profile under /root pointing to PROFILE. | |
08fa7613 LC |
187 | DEDUPLICATE? determines whether to deduplicate files in the store. |
188 | ||
9d3fb6c7 LC |
189 | This is used to create the self-contained Guix tarball." |
190 | (define (scope file) | |
191 | (string-append directory "/" file)) | |
192 | ||
193 | (define %root-profile | |
194 | "/var/guix/profiles/per-user/root") | |
195 | ||
196 | (define (mkdir-p* dir) | |
197 | (mkdir-p (scope dir))) | |
198 | ||
199 | (define (symlink* old new) | |
200 | (symlink old (scope new))) | |
201 | ||
202 | ;; Populate the store. | |
203 | (populate-store (list closure) directory) | |
08fa7613 LC |
204 | (register-closure (canonicalize-path directory) closure |
205 | #:deduplicate? deduplicate?) | |
9d3fb6c7 LC |
206 | |
207 | ;; XXX: 'guix-register' registers profiles as GC roots but the symlink | |
208 | ;; target uses $TMPDIR. Fix that. | |
209 | (delete-file (scope "/var/guix/gcroots/profiles")) | |
210 | (symlink* "/var/guix/profiles" | |
211 | "/var/guix/gcroots/profiles") | |
212 | ||
213 | ;; Make root's profile, which makes it a GC root. | |
214 | (mkdir-p* %root-profile) | |
215 | (symlink* profile | |
216 | (string-append %root-profile "/guix-profile-1-link")) | |
217 | (symlink* (string-append %root-profile "/guix-profile-1-link") | |
218 | (string-append %root-profile "/guix-profile")) | |
219 | ||
220 | (mkdir-p* "/root") | |
221 | (symlink* (string-append %root-profile "/guix-profile") | |
222 | "/root/.guix-profile")) | |
223 | ||
5ce3defe | 224 | ;;; install.scm ends here |