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git/t/t2401-worktree-prune.sh
Eric Sunshine 916133ef8e worktree: prune linked worktree referencing main worktree path
"git worktree prune" detects when multiple entries are associated with
the same path and prunes the duplicates, however, it does not detect
when a linked worktree points at the path of the main worktree.
Although "git worktree add" disallows creating a new worktree with the
same path as the main worktree, such a case can arise outside the
control of Git even without the user mucking with .git/worktree/<id>/
administrative files. For instance:

    $ git clone foo.git
    $ git -C foo worktree add ../bar
    $ rm -rf bar
    $ mv foo bar
    $ git -C bar worktree list
    .../bar deadfeeb [master]
    .../bar deadfeeb [bar]

Help the user recover from such corruption by extending "git worktree
prune" to also detect when a linked worktree is associated with the path
of the main worktree.

Reported-by: Jonathan Müller <jonathanmueller.dev@gmail.com>
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10 10:54:49 -07:00

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Executable File

#!/bin/sh
test_description='prune $GIT_DIR/worktrees'
. ./test-lib.sh
test_expect_success initialize '
git commit --allow-empty -m init
'
test_expect_success 'worktree prune on normal repo' '
git worktree prune &&
test_must_fail git worktree prune abc
'
test_expect_success 'prune files inside $GIT_DIR/worktrees' '
mkdir .git/worktrees &&
: >.git/worktrees/abc &&
git worktree prune --verbose >actual &&
cat >expect <<EOF &&
Removing worktrees/abc: not a valid directory
EOF
test_i18ncmp expect actual &&
! test -f .git/worktrees/abc &&
! test -d .git/worktrees
'
test_expect_success 'prune directories without gitdir' '
mkdir -p .git/worktrees/def/abc &&
: >.git/worktrees/def/def &&
cat >expect <<EOF &&
Removing worktrees/def: gitdir file does not exist
EOF
git worktree prune --verbose >actual &&
test_i18ncmp expect actual &&
! test -d .git/worktrees/def &&
! test -d .git/worktrees
'
test_expect_success SANITY 'prune directories with unreadable gitdir' '
mkdir -p .git/worktrees/def/abc &&
: >.git/worktrees/def/def &&
: >.git/worktrees/def/gitdir &&
chmod u-r .git/worktrees/def/gitdir &&
git worktree prune --verbose >actual &&
test_i18ngrep "Removing worktrees/def: unable to read gitdir file" actual &&
! test -d .git/worktrees/def &&
! test -d .git/worktrees
'
test_expect_success 'prune directories with invalid gitdir' '
mkdir -p .git/worktrees/def/abc &&
: >.git/worktrees/def/def &&
: >.git/worktrees/def/gitdir &&
git worktree prune --verbose >actual &&
test_i18ngrep "Removing worktrees/def: invalid gitdir file" actual &&
! test -d .git/worktrees/def &&
! test -d .git/worktrees
'
test_expect_success 'prune directories with gitdir pointing to nowhere' '
mkdir -p .git/worktrees/def/abc &&
: >.git/worktrees/def/def &&
echo "$(pwd)"/nowhere >.git/worktrees/def/gitdir &&
git worktree prune --verbose >actual &&
test_i18ngrep "Removing worktrees/def: gitdir file points to non-existent location" actual &&
! test -d .git/worktrees/def &&
! test -d .git/worktrees
'
test_expect_success 'not prune locked checkout' '
test_when_finished rm -r .git/worktrees &&
mkdir -p .git/worktrees/ghi &&
: >.git/worktrees/ghi/locked &&
git worktree prune &&
test -d .git/worktrees/ghi
'
test_expect_success 'not prune recent checkouts' '
test_when_finished rm -r .git/worktrees &&
git worktree add jlm HEAD &&
test -d .git/worktrees/jlm &&
rm -rf jlm &&
git worktree prune --verbose --expire=2.days.ago &&
test -d .git/worktrees/jlm
'
test_expect_success 'not prune proper checkouts' '
test_when_finished rm -r .git/worktrees &&
git worktree add --detach "$PWD/nop" master &&
git worktree prune &&
test -d .git/worktrees/nop
'
test_expect_success 'prune duplicate (linked/linked)' '
test_when_finished rm -fr .git/worktrees w1 w2 &&
git worktree add --detach w1 &&
git worktree add --detach w2 &&
sed "s/w2/w1/" .git/worktrees/w2/gitdir >.git/worktrees/w2/gitdir.new &&
mv .git/worktrees/w2/gitdir.new .git/worktrees/w2/gitdir &&
git worktree prune --verbose >actual &&
test_i18ngrep "duplicate entry" actual &&
test -d .git/worktrees/w1 &&
! test -d .git/worktrees/w2
'
test_expect_success 'prune duplicate (main/linked)' '
test_when_finished rm -fr repo wt &&
test_create_repo repo &&
test_commit -C repo x &&
git -C repo worktree add --detach ../wt &&
rm -fr wt &&
mv repo wt &&
git -C wt worktree prune --verbose >actual &&
test_i18ngrep "duplicate entry" actual &&
! test -d .git/worktrees/wt
'
test_done