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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
;;;
;;; 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)
#:export (git-command
with-temporary-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)
(apply invoke (git-command) "-C" directory
command args))
(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)
(display (if (string? contents)
contents
(with-repository directory repository
(contents repository)))
port)))
(git "add" file)
(loop rest)))
((('commit text) rest ...)
(git "commit" "-m" text)
(loop rest))
((('tag name) rest ...)
(git "tag" name)
(loop rest))
((('branch name) rest ...)
(git "branch" name)
(loop rest))
((('checkout branch) rest ...)
(git "checkout" branch)
(loop rest))
((('merge branch message) rest ...)
(git "merge" branch "-m" message)
(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 (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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