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git: Remove untracked files from cached checkouts.

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Cached checkouts could end up with stale untracked files, for example
because the checkout was interrupted.  As a result, when this happens
for the Guix checkout, users would not get substitutes for ‘guix pull’.

* guix/git.scm (delete-untracked-files): New procedure.
(switch-to-ref): Use it.
* tests/git.scm ("update-cached-checkout, untracked files removed"): New
test.

Co-authored-by: Ricardo Wurmus <rekado@elephly.net>
Change-Id: Iccbe644ade396ad27a037db7e0ef1c2a68ef91ce
This commit is contained in:
Ludovic Courtès 2024-07-02 14:52:07 +02:00
parent fcd3c5d3aa
commit 58e268c2e3
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2 changed files with 45 additions and 1 deletions
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24
guix/git.scm
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@ -298,6 +298,25 @@ (define (resolve-reference repository ref)
(('tag . tag) (('tag . tag)
(tag->commit repository tag))))) (tag->commit repository tag)))))
(define (delete-untracked-files repository)
"Delete untracked files from the work directory of REPOSITORY."
(let ((workdir (repository-working-directory repository))
(status (status-list-new repository
(make-status-options
STATUS-SHOW-WORKDIR-ONLY
(logior
STATUS-FLAG-INCLUDE-UNTRACKED
STATUS-FLAG-INCLUDE-IGNORED)))))
(for-each (lambda (entry)
(let ((status (status-entry-status entry)))
(when (or (memq 'wt-new status)
(memq 'ignored status))
(let* ((diff (status-entry-index-to-workdir entry))
(new (diff-delta-new-file diff)))
(delete-file-recursively
(in-vicinity workdir (diff-file-path new)))))))
(status-list->status-entries status))))
(define (switch-to-ref repository ref) (define (switch-to-ref repository ref)
"Switch to REPOSITORY's branch, commit or tag specified by REF. Return the "Switch to REPOSITORY's branch, commit or tag specified by REF. Return the
OID (roughly the commit hash) corresponding to REF." OID (roughly the commit hash) corresponding to REF."
@ -305,6 +324,11 @@ (define obj
(resolve-reference repository ref)) (resolve-reference repository ref))
(reset repository obj RESET_HARD) (reset repository obj RESET_HARD)
;; There might still be untracked files in REPOSITORY due to an interrupted
;; checkout for example; delete them.
(delete-untracked-files repository)
(object-id obj)) (object-id obj))
(define (call-with-repository directory proc) (define (call-with-repository directory proc)

22
tests/git.scm
View file

@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019, 2020, 2022 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2019-2020, 2022, 2024 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz ;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz
;;; ;;;
;;; This file is part of GNU Guix. ;;; This file is part of GNU Guix.
@ -259,4 +259,24 @@ (define-module (test-git)
;; COMMIT should be the ID of the commit object, not that of the tag. ;; COMMIT should be the ID of the commit object, not that of the tag.
(string=? commit head)))))) (string=? commit head))))))
(test-assert "update-cached-checkout, untracked files removed"
(call-with-temporary-directory
(lambda (cache)
(with-temporary-git-repository directory
'((add "a.txt" "A")
(add ".gitignore" ".~\n")
(commit "First commit"))
(let ((directory commit relation
(update-cached-checkout directory
#:ref '()
#:cache-directory cache)))
(close-port
(open-output-file (in-vicinity cache "stale-untracked-file")))
(let ((directory2 commit2 relation2
(update-cached-checkout directory
#:ref '()
#:cache-directory cache)))
(not (file-exists?
(in-vicinity cache "stale-untracked-file")))))))))
(test-end "git") (test-end "git")