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git: 'commit-difference' really excludes the ancestors of #:excluded.

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* guix/git.scm (commit-difference): Initialize VISITED to the closure of
OLD and EXCLUDED, as written in the docstring.
* tests/git.scm ("commit-difference, excluded commits"): Adjust
accordingly.
This commit is contained in:
Ludovic Courtès 2020-06-08 21:39:55 +02:00
parent 5d95ac9178
commit 72357e2170
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2 changed files with 4 additions and 3 deletions
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4
guix/git.scm
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@ -416,7 +416,9 @@ (define* (commit-difference new old #:optional (excluded '()))
that of OLD."
(let loop ((commits (list new))
(result '())
(visited (commit-closure old (list->setq excluded))))
(visited (fold commit-closure
(setq)
(cons old excluded))))
(match commits
(()
(reverse result))

3
tests/git.scm
View file

@ -119,8 +119,7 @@ (define-module (test-git)
(list commit3 commit4))
(lset= eq? (commit-difference commit4 commit1 (list commit3))
(list commit4))
(lset= eq? (commit-difference commit4 commit1 (list commit5))
(list commit2 commit3 commit4)))))))
(null? (commit-difference commit4 commit1 (list commit5))))))))
(unless (which (git-command)) (test-skip 1))
(test-equal "commit-relation"