From 91e837283885ed735782709668c5ea7557e27dfe Mon Sep 17 00:00:00 2001 From: Maxim Cournoyer Date: Tue, 15 Jun 2021 10:13:29 -0400 Subject: [PATCH] pack: Extract builder code from self-contained-tarball. This is made to allow reusing it for the debian-archive pack format, added in a subsequent commit. * guix/scripts/pack.scm (self-contained-tarball/builder): New procedure, containing the build code extracted from self-contained-tarball. (self-contained-tarball): Use the above procedure. --- guix/scripts/pack.scm | 270 ++++++++++++++++++++++-------------------- 1 file changed, 141 insertions(+), 129 deletions(-) diff --git a/guix/scripts/pack.scm b/guix/scripts/pack.scm index 8cb4e6d2cc..ac477850e6 100644 --- a/guix/scripts/pack.scm +++ b/guix/scripts/pack.scm @@ -172,22 +172,17 @@ dependencies are registered." (computed-file "store-database" build #:options `(#:references-graphs ,(zip labels items)))) -(define* (self-contained-tarball name profile - #:key target - (profile-name "guix-profile") - deduplicate? - entry-point - (compressor (first %compressors)) - localstatedir? - (symlinks '()) - (archiver tar)) - "Return a self-contained tarball containing a store initialized with the -closure of PROFILE, a derivation. The tarball contains /gnu/store; if -LOCALSTATEDIR? is true, it also contains /var/guix, including /var/guix/db -with a properly initialized store database. - -SYMLINKS must be a list of (SOURCE -> TARGET) tuples denoting symlinks to be -added to the pack." + +;;; +;;; Tarball format. +;;; +(define* (self-contained-tarball/builder profile + #:key (profile-name "guix-profile") + (compressor (first %compressors)) + localstatedir? + (symlinks '()) + (archiver tar)) + "Return the G-Expression of the builder used for self-contained-tarball." (define database (and localstatedir? (file-append (store-database (list profile)) @@ -209,125 +204,142 @@ added to the pack." (and (not-config? module) (not (equal? '(guix store deduplication) module)))) - (define build - (with-imported-modules (source-module-closure - `((guix build utils) - (guix build union) - (gnu build install)) - #:select? import-module?) - #~(begin - (use-modules (guix build utils) - ((guix build union) #:select (relative-file-name)) - (gnu build install) - (srfi srfi-1) - (srfi srfi-26) - (ice-9 match)) + (with-imported-modules (source-module-closure + `((guix build utils) + (guix build union) + (gnu build install)) + #:select? import-module?) + #~(begin + (use-modules (guix build utils) + ((guix build union) #:select (relative-file-name)) + (gnu build install) + (srfi srfi-1) + (srfi srfi-26) + (ice-9 match)) + + (define %root "root") + + (define symlink->directives + ;; Return "populate directives" to make the given symlink and its + ;; parent directories. + (match-lambda + ((source '-> target) + (let ((target (string-append #$profile "/" target)) + (parent (dirname source))) + ;; Never add a 'directory' directive for "/" so as to + ;; preserve its ownnership when extracting the archive (see + ;; below), and also because this would lead to adding the + ;; same entries twice in the tarball. + `(,@(if (string=? parent "/") + '() + `((directory ,parent))) + (,source + -> ,(relative-file-name parent target))))))) + + (define directives + ;; Fully-qualified symlinks. + (append-map symlink->directives '#$symlinks)) + + ;; The --sort option was added to GNU tar in version 1.28, released + ;; 2014-07-28. For testing, we use the bootstrap tar, which is + ;; older and doesn't support it. + (define tar-supports-sort? + (zero? (system* (string-append #+archiver "/bin/tar") + "cf" "/dev/null" "--files-from=/dev/null" + "--sort=name"))) + + ;; Make sure non-ASCII file names are properly handled. + #+set-utf8-locale + + ;; Add 'tar' to the search path. + (setenv "PATH" #+(file-append archiver "/bin")) + + ;; Note: there is not much to gain here with deduplication and there + ;; is the overhead of the '.links' directory, so turn it off. + ;; Furthermore GNU tar < 1.30 sometimes fails to extract tarballs + ;; with hard links: + ;; . + (populate-single-profile-directory %root + #:profile #$profile + #:profile-name #$profile-name + #:closure "profile" + #:database #+database) + + ;; Create SYMLINKS. + (for-each (cut evaluate-populate-directive <> %root) + directives) + + ;; Create the tarball. Use GNU format so there's no file name + ;; length limitation. + (with-directory-excursion %root + (apply invoke "tar" + #+@(if (compressor-command compressor) + #~("-I" + (string-join + '#+(compressor-command compressor))) + #~()) + "--format=gnu" + ;; Avoid non-determinism in the archive. + ;; Use mtime = 1, not zero, because that is what the daemon + ;; does for files in the store (see the 'mtimeStore' constant + ;; in local-store.cc.) + (if tar-supports-sort? "--sort=name" "--mtime=@1") + "--owner=root:0" + "--group=root:0" + "--check-links" + "-cvf" #$output + ;; Avoid adding / and /var to the tarball, so + ;; that the ownership and permissions of those + ;; directories will not be overwritten when + ;; extracting the archive. Do not include /root + ;; because the root account might have a + ;; different home directory. + #$@(if localstatedir? + '("./var/guix") + '()) + + (string-append "." (%store-directory)) + + (delete-duplicates + (filter-map (match-lambda + (('directory directory) + (string-append "." directory)) + ((source '-> _) + (string-append "." source)) + (_ #f)) + directives))))))) - (define %root "root") - - (define symlink->directives - ;; Return "populate directives" to make the given symlink and its - ;; parent directories. - (match-lambda - ((source '-> target) - (let ((target (string-append #$profile "/" target)) - (parent (dirname source))) - ;; Never add a 'directory' directive for "/" so as to - ;; preserve its ownnership when extracting the archive (see - ;; below), and also because this would lead to adding the - ;; same entries twice in the tarball. - `(,@(if (string=? parent "/") - '() - `((directory ,parent))) - (,source - -> ,(relative-file-name parent target))))))) - - (define directives - ;; Fully-qualified symlinks. - (append-map symlink->directives '#$symlinks)) - - ;; The --sort option was added to GNU tar in version 1.28, released - ;; 2014-07-28. For testing, we use the bootstrap tar, which is - ;; older and doesn't support it. - (define tar-supports-sort? - (zero? (system* (string-append #+archiver "/bin/tar") - "cf" "/dev/null" "--files-from=/dev/null" - "--sort=name"))) - - ;; Make sure non-ASCII file names are properly handled. - #+set-utf8-locale - - ;; Add 'tar' to the search path. - (setenv "PATH" #+(file-append archiver "/bin")) - - ;; Note: there is not much to gain here with deduplication and there - ;; is the overhead of the '.links' directory, so turn it off. - ;; Furthermore GNU tar < 1.30 sometimes fails to extract tarballs - ;; with hard links: - ;; . - (populate-single-profile-directory %root - #:profile #$profile - #:profile-name #$profile-name - #:closure "profile" - #:database #+database) - - ;; Create SYMLINKS. - (for-each (cut evaluate-populate-directive <> %root) - directives) - - ;; Create the tarball. Use GNU format so there's no file name - ;; length limitation. - (with-directory-excursion %root - (exit - (zero? (apply system* "tar" - #+@(if (compressor-command compressor) - #~("-I" - (string-join - '#+(compressor-command compressor))) - #~()) - "--format=gnu" - - ;; Avoid non-determinism in the archive. Use - ;; mtime = 1, not zero, because that is what the - ;; daemon does for files in the store (see the - ;; 'mtimeStore' constant in local-store.cc.) - (if tar-supports-sort? "--sort=name" "--mtime=@1") - "--mtime=@1" ;for files in /var/guix - "--owner=root:0" - "--group=root:0" - - "--check-links" - "-cvf" #$output - ;; Avoid adding / and /var to the tarball, so - ;; that the ownership and permissions of those - ;; directories will not be overwritten when - ;; extracting the archive. Do not include /root - ;; because the root account might have a - ;; different home directory. - #$@(if localstatedir? - '("./var/guix") - '()) - - (string-append "." (%store-directory)) - - (delete-duplicates - (filter-map (match-lambda - (('directory directory) - (string-append "." directory)) - ((source '-> _) - (string-append "." source)) - (_ #f)) - directives))))))))) +(define* (self-contained-tarball name profile + #:key target + (profile-name "guix-profile") + deduplicate? + entry-point + (compressor (first %compressors)) + localstatedir? + (symlinks '()) + (archiver tar)) + "Return a self-contained tarball containing a store initialized with the +closure of PROFILE, a derivation. The tarball contains /gnu/store; if +LOCALSTATEDIR? is true, it also contains /var/guix, including /var/guix/db +with a properly initialized store database. +SYMLINKS must be a list of (SOURCE -> TARGET) tuples denoting symlinks to be +added to the pack." (when entry-point (warning (G_ "entry point not supported in the '~a' format~%") 'tarball)) - (gexp->derivation (string-append name ".tar" - (compressor-extension compressor)) - build - #:target target - #:references-graphs `(("profile" ,profile)))) + (gexp->derivation + (string-append name ".tar" + (compressor-extension compressor)) + (self-contained-tarball/builder profile + #:profile-name profile-name + #:compressor compressor + #:localstatedir? localstatedir? + #:symlinks symlinks + #:archiver archiver) + #:target target + #:references-graphs `(("profile" ,profile)))) (define (singularity-environment-file profile) "Return a shell script that defines the environment variables corresponding -- 2.20.1