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guix: ruby-build-system: Build compiled gems reproducibly. 

* guix/build/ruby-build-system.scm (log-file-deletion): New procedure.
(install): Remove files containing non-reproducible elements.  Print when each
file is deleted.
This commit is contained in:
Ben Woodcroft 2016-08-10 12:23:59 +10:00
parent ed5940b617
commit edf0a45846
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1 changed files with 32 additions and 6 deletions
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38
guix/build/ruby-build-system.scm
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@ -120,18 +120,44 @@ GEM-FLAGS are passed to the 'gem' invokation, if present."
1))
(out (assoc-ref outputs "out"))
(gem-home (string-append out "/lib/ruby/gems/" ruby-version ".0"))
(gem-name (first-matching-file "\\.gem$")))
(gem-file (first-matching-file "\\.gem$"))
(gem-file-basename (basename gem-file))
(gem-name (substring gem-file-basename
0
(- (string-length gem-file-basename) 4)))
(gem-directory (string-append gem-home "/gems/" gem-name)))
(setenv "GEM_HOME" gem-home)
(mkdir-p gem-home)
(and (apply system* "gem" "install" gem-name
(and (apply system* "gem" "install" gem-file
"--local" "--ignore-dependencies"
;; Executables should go into /bin, not /lib/ruby/gems.
"--bindir" (string-append out "/bin")
gem-flags)
;; Remove the cached gem file as this is unnecessary and contains
;; timestamped files rendering builds not reproducible.
(begin (delete-file (string-append gem-home "/cache/" gem-name))
#t))))
(begin
;; Remove the cached gem file as this is unnecessary and contains
;; timestamped files rendering builds not reproducible.
(let ((cached-gem (string-append gem-home "/cache/" gem-file)))
(log-file-deletion cached-gem)
(delete-file cached-gem))
;; For gems with native extensions, several Makefile-related files
;; are created that contain timestamps or other elements making
;; them not reproducible. They are unnecessary so we remove them.
(if (file-exists? (string-append gem-directory "/ext"))
(begin
(for-each (lambda (file)
(log-file-deletion file)
(delete-file file))
(append
(find-files (string-append gem-home "/doc")
"page-Makefile.ri")
(find-files (string-append gem-home "/extensions")
"gem_make.out")
(find-files (string-append gem-directory "/ext")
"Makefile")))))
#t))))
(define (log-file-deletion file)
(display (string-append "deleting '" file "' for reproducibility\n")))
(define %standard-phases
(modify-phases gnu:%standard-phases