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;;; Guile-Git --- GNU Guile bindings of libgit2
;;; Copyright © 2025 Nicolas Graves <ngraves@ngraves.fr>
;;;
;;; This file is part of Guile-Git.
;;;
;;; Guile-Git 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.
;;;
;;; Guile-Git 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 Guile-Git. If not, see <http://www.gnu.org/licenses/>.
(define-module (tests revwalker)
#:use-module (git)
#:use-module (git structs)
#:use-module (tests helpers)
#:use-module (srfi srfi-64)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (ice-9 match))
(test-begin "revwalker")
(with-repository "simple" directory
(let* ((repository (repository-open directory))
(head (repository-head repository))
(master-oid (reference-target head))
(walker (revwalk-new repository)))
(test-assert "revwalk-push!, revwalk-next!, revwalk-reset!"
(begin
(revwalk-push! walker master-oid)
(oid? (revwalk-next! walker))))
(test-assert "revwalk-reset!"
(begin
(revwalk-reset! walker)
(not (revwalk-next! walker))))
(test-assert "revwalk-push-range!"
(begin
(revwalk-reset! walker)
(revwalk-push-range! walker "HEAD~2..HEAD")
(let loop ((oids '()))
(match (revwalk-next! walker)
(#f (= (length oids) 2)) ; Ensure we collected commits
((? oid? oid) (loop (cons oid oids)))))))
(test-assert "revwalk-hide!"
(begin
(revwalk-reset! walker)
(revwalk-push! walker master-oid)
(let* ((initial-commits (let loop ((oids '()))
(match (revwalk-next! walker)
(#f (reverse oids))
((? oid? oid) (loop (cons oid oids))))))
(first-oid (car initial-commits)))
;; Reset the walker, hide the first commit, and check if it's excluded
(revwalk-reset! walker)
(revwalk-hide! walker first-oid)
(revwalk-push! walker master-oid)
(not (member first-oid
(let loop ((oids '()))
(match (revwalk-next! walker)
(#f (reverse oids))
((? oid? oid) (loop (cons oid oids))))))))))))
(test-end "revwalker")
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