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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
;;;
;;; 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 tests git)
#:use-module (git)
#:use-module ((guix git) #:select (with-repository))
#:use-module (guix utils)
#:use-module (guix build utils)
#:use-module (ice-9 match)
#:use-module ((ice-9 control) #:select (let/ec))
#:export (git-command
with-temporary-git-repository
with-git-repository
find-commit))
(define git-command
(make-parameter "git"))
(define (populate-git-repository directory directives)
"Initialize a new Git checkout and repository in DIRECTORY and apply
DIRECTIVES. Each element of DIRECTIVES is an sexp like:
(add \"foo.txt\" \"hi!\")
Return DIRECTORY on success."
;; Note: As of version 0.2.0, Guile-Git lacks the necessary bindings to do
;; all this, so resort to the "git" command.
(define (git command . args)
;; Make sure Git doesn't rely on the user's config.
(call-with-temporary-directory
(lambda (home)
(call-with-output-file (string-append home "/.gitconfig")
(lambda (port)
(display "[user]
email = charlie@example.org\n name = Charlie Guix\n"
port)))
(with-environment-variables
`(("GIT_CONFIG_NOSYSTEM" "1")
("GIT_ATTR_NOSYSTEM" "1")
("GIT_CONFIG_GLOBAL" ,(string-append home "/.gitconfig"))
("HOME" ,home))
(apply invoke (git-command) "-C" directory
command args)))))
(unless (directory-exists? (string-append directory "/.git"))
(mkdir-p directory)
(git "init"))
(let loop ((directives directives))
(match directives
(()
directory)
((('add file contents) rest ...)
(let ((file (string-append directory "/" file)))
(mkdir-p (dirname file))
(call-with-output-file file
(lambda (port)
(set-port-encoding! port "UTF-8")
(display (if (string? contents)
contents
(with-repository directory repository
(contents repository)))
port)))
(git "add" file)
(loop rest)))
((('add file-name-and-content) rest ...)
(loop (cons `(add ,file-name-and-content ,file-name-and-content)
rest)))
((('remove file) rest ...)
(git "rm" "-f" file)
(loop rest))
((('commit text) rest ...)
(git "commit" "-m" text)
(loop rest))
((('commit text ('signer fingerprint)) rest ...)
(git "commit" "-m" text (string-append "--gpg-sign=" fingerprint))
(loop rest))
((('tag name) rest ...)
(git "tag" name)
(loop rest))
((('tag name text) rest ...)
(git "tag" "-m" text name)
(loop rest))
((('branch name) rest ...)
(git "branch" name)
(loop rest))
((('checkout branch) rest ...)
(git "checkout" branch)
(loop rest))
((('checkout branch 'orphan) rest ...)
(git "checkout" "--orphan" branch)
(loop rest))
((('merge branch message) rest ...)
(git "merge" branch "-m" message)
(loop rest))
((('merge branch message ('signer fingerprint)) rest ...)
(git "merge" branch "-m" message
(string-append "--gpg-sign=" fingerprint))
(loop rest))
((('reset to) rest ...)
(git "reset" "--hard" to)
(loop rest)))))
(define (call-with-temporary-git-repository directives proc)
(call-with-temporary-directory
(lambda (directory)
(populate-git-repository directory directives)
(proc directory))))
(define-syntax-rule (with-temporary-git-repository directory
directives exp ...)
"Evaluate EXP in a context where DIRECTORY contains a checkout populated as
per DIRECTIVES."
(call-with-temporary-git-repository directives
(lambda (directory)
exp ...)))
(define-syntax-rule (with-git-repository directory
directives exp ...)
"Evaluate EXP in a context where DIRECTORY is (further) populated as
per DIRECTIVES."
(begin
(populate-git-repository directory directives)
exp ...))
(define (find-commit repository message)
"Return the commit in REPOSITORY whose message includes MESSAGE, a string."
(let/ec return
(fold-commits (lambda (commit _)
(and (string-contains (commit-message commit)
message)
(return commit)))
#f
repository)
(error "commit not found" message)))
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