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;; disfluid, implementation of the Solid specification
;; Copyright (C) 2022 Vivien Kraus
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU Affero General Public License as
;; published by the Free Software Foundation, either version 3 of the
;; License, or (at your option) any later version.
;; This program 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 Affero General Public License for more details.
;; You should have received a copy of the GNU Affero General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
(define-module (disfluid maintainer scan-source)
#:use-module (guix gexp)
#:use-module (guix store)
#:use-module (guix monads)
#:use-module (guix derivations)
#:use-module (guix modules)
#:use-module (gnu packages version-control)
#:use-module (gnu packages package-management)
#:use-module (gnu packages base)
#:use-module (ice-9 popen)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 match)
#:declarative? #t
#:export (scan-source))
;; The goal of scan-source is to run in the root of a git repository,
;; and then extract the following information as an alist:
;; - the version information of the checked out source (key: 'version);
;; - the latest commit ID of the main branch (key: 'commit);
;; - the latest commit ID in the translations branch (key: 'translations-commit);
;; - the guix hash of the latest commit in the main branch (key: 'hash);
;; - the guix hash of the translations branch (key: translations-hash);
;; - an alist of file names (e.g. "doc/disfluid.texi") to timestamp of their last modification date (key: 'mtimes);
;; - the translation files as a file-like object, from po file name (e.g. "en.po") to whole file content as a string (key: 'po-files).
;; It uses a temporary directory in /tmp to do that, but the directory
;; gets cleaned up. No other file is modified.
(define scan-source-code
(with-imported-modules
(source-module-closure '((guix build utils)))
#~(begin
(use-modules (guix build utils)
(ice-9 rdelim)
(ice-9 popen)
(ice-9 receive)
(ice-9 match))
(define* (first-line . command)
(let ((port
(apply
open-pipe*
OPEN_READ
command)))
(let ((line (read-line port)))
(close-port port)
line)))
(define* (git . args)
(apply first-line #$(file-append git "/bin/git") args))
(define* (invoke-git . args)
(apply invoke #$(file-append git "/bin/git") args))
(define (git-archive ref output)
(invoke-git "archive" ref "-o" output))
(define (date . args)
(apply first-line #$(file-append coreutils "/bin/date") args))
(define (git-log-1-%ci-timestamp ref file)
(let ((readable (git "log" ref "-1" "--format=%ci" "--" file)))
(string->number (date "-d" readable "+%s"))))
(define* (invoke-tar . args)
(apply invoke #$(file-append tar "/bin/tar") args))
(define (tar-xf archive)
(invoke-tar "xf" archive))
(define* (guix . args)
(apply first-line #$(file-append guix "/bin/guix") args))
(define (guix-hash dir)
(guix "hash" "-x" "-S" "nar" dir))
(let ((version (git "describe" "--tags" "--dirty"))
(commit (git "rev-parse" "main"))
(translations-commit (git "rev-parse" "translations"))
(directory
(mkdtemp "/tmp/analyze-source-XXXXXX")))
(git-archive "main"
(string-append directory "/source.tar.gz"))
(git-archive "translations"
(string-append directory "/translations.tar.gz"))
(receive (hash translations-hash all-translations)
(with-directory-excursion directory
(mkdir-p "pure")
(mkdir-p "translations")
(let ((h
(with-directory-excursion "pure"
(tar-xf "../source.tar.gz")
(guix-hash (getcwd))))
(po-h
(with-directory-excursion "translations"
(tar-xf "../translations.tar.gz")
(guix-hash (getcwd)))))
(let ((all-translations
(with-directory-excursion "translations/po"
(let ((dir (opendir (getcwd))))
(let scan ((all '()))
(let ((next (readdir dir)))
(cond
((eof-object? next)
(begin
(closedir dir)
(reverse all)))
((or (string-suffix? ".po" next)
(string-suffix? ".pot" next))
(let ((lang (basename next))
(content
(call-with-input-file next
(lambda (port)
(read-delimited "" port)))))
(scan `((,lang ,content) ,@all))))
(else
(scan all)))))))))
(delete-file-recursively "pure")
(delete-file-recursively "translations")
(values h po-h all-translations))))
(delete-file (string-append directory "/source.tar.gz"))
(delete-file (string-append directory "/translations.tar.gz"))
(delete-file-recursively directory)
(let ((mtimes
(let ((important-files
'(("main" . "doc/disfluid.texi")
("translations" . "po/disfluid.pot"))))
(map
(match-lambda
((ref . file)
`(,file . ,(git-log-1-%ci-timestamp ref file))))
important-files))))
(write
`((version . ,version)
(commit . ,commit)
(hash . ,hash)
(translations-commit . ,translations-commit)
(translations-hash . ,translations-hash)
(mtimes . ,mtimes)
(po-files . ,all-translations)))))))))
(define (scan-source)
(let ((port
(open-pipe*
OPEN_READ
(run-with-store (open-connection)
(mlet %store-monad
((scan-source
(gexp->script "invoke-scan-source-script"
scan-source-code)))
(mbegin %store-monad
(built-derivations (list scan-source))
(return (derivation->output-path scan-source))))))))
(let ((ret (read port)))
(close-port port)
`((version . ,(assq-ref ret 'version))
(commit . ,(assq-ref ret 'commit))
(hash . ,(assq-ref ret 'hash))
(translations-commit . ,(assq-ref ret 'translations-commit))
(translations-hash . ,(assq-ref ret 'translations-hash))
(mtimes . ,(assq-ref ret 'mtimes))
(po-files
. ,(file-union
"local-translations"
`(("po"
,(file-union
"po"
(map
(match-lambda
((file.po content)
`(,file.po ,(plain-file file.po content))))
(assq-ref ret 'po-files)))))))))))
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