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init: teach --separate-git-dir to repair linked worktrees

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A linked worktree's .git file is a "gitfile" pointing at the
.git/worktrees/<id> directory within the repository. When `git init
--separate-git-dir=<path>` is used on an existing repository to relocate
the repository's .git/ directory to a different location, it neglects to
update the .git files of linked worktrees, thus breaking the worktrees
by making it impossible for them to locate the repository. Fix this by
teaching --separate-git-dir to repair the .git file of each linked
worktree to point at the new repository location.

Reported-by: Henré Botha <henrebotha@gmail.com>
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Sunshine 2020-08-31 02:57:59 -04:00 committed by Junio C Hamano
parent b214ab5aa5
commit 42264bc841
2 changed files with 13 additions and 0 deletions
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2
builtin/init-db.c
View file

@ -9,6 +9,7 @@
#include "builtin.h"
#include "exec-cmd.h"
#include "parse-options.h"
#include "worktree.h"
#ifndef DEFAULT_GIT_TEMPLATE_DIR
#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
@ -364,6 +365,7 @@ static void separate_git_dir(const char *git_dir, const char *git_link)
if (rename(src, git_dir))
die_errno(_("unable to move %s to %s"), src, git_dir);
repair_worktrees(NULL, NULL);
}
write_file(git_link, "gitdir: %s", git_dir);

11
t/t0001-init.sh
View file

@ -405,6 +405,17 @@ test_expect_success SYMLINKS 're-init to move gitdir symlink' '
test_path_is_dir realgitdir/refs
'
test_expect_success 're-init to move gitdir with linked worktrees' '
test_when_finished "rm -rf mainwt linkwt seprepo" &&
git init mainwt &&
test_commit -C mainwt gumby &&
git -C mainwt worktree add --detach ../linkwt &&
git -C mainwt init --separate-git-dir ../seprepo &&
git -C mainwt rev-parse --git-common-dir >expect &&
git -C linkwt rev-parse --git-common-dir >actual &&
test_cmp expect actual
'
test_expect_success MINGW '.git hidden' '
rm -rf newdir &&
(