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fsck: check HEAD and reflog from other worktrees 

fsck is a repo-wide operation and should check all references no
matter which worktree they are associated to.

Reported-by: Jeff King <peff@peff.net>
Helped-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Nguyễn Thái Ngọc Duy 2018-10-21 10:08:58 +02:00 committed by Junio C Hamano
parent a8c754d4e2
commit b29759d89a
2 changed files with 73 additions and 17 deletions
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55
builtin/fsck.c
View File

@ -19,6 +19,7 @@
#include "packfile.h"
#include "object-store.h"
#include "run-command.h"
#include "worktree.h"

#define REACHABLE 0x0001
#define SEEN 0x0002
@ -444,7 +445,11 @@ static int fsck_handle_reflog_ent(struct object_id *ooid, struct object_id *noid
static int fsck_handle_reflog(const char *logname, const struct object_id *oid,
int flag, void *cb_data)
{
for_each_reflog_ent(logname, fsck_handle_reflog_ent, (void *)logname);
struct strbuf refname = STRBUF_INIT;

strbuf_worktree_ref(cb_data, &refname, logname);
for_each_reflog_ent(refname.buf, fsck_handle_reflog_ent, refname.buf);
strbuf_release(&refname);
return 0;
}

@ -482,20 +487,34 @@ static int fsck_handle_ref(const char *refname, const struct object_id *oid,
return 0;
}

static int fsck_head_link(const char **head_points_at,
static int fsck_head_link(const char *head_ref_name,
const char **head_points_at,
struct object_id *head_oid);

static void get_default_heads(void)
{
struct worktree **worktrees, **p;
const char *head_points_at;
struct object_id head_oid;

fsck_head_link(&head_points_at, &head_oid);
if (head_points_at && !is_null_oid(&head_oid))
fsck_handle_ref("HEAD", &head_oid, 0, NULL);
for_each_rawref(fsck_handle_ref, NULL);
if (include_reflogs)
for_each_reflog(fsck_handle_reflog, NULL);

worktrees = get_worktrees(0);
for (p = worktrees; *p; p++) {
struct worktree *wt = *p;
struct strbuf ref = STRBUF_INIT;

strbuf_worktree_ref(wt, &ref, "HEAD");
fsck_head_link(ref.buf, &head_points_at, &head_oid);
if (head_points_at && !is_null_oid(&head_oid))
fsck_handle_ref(ref.buf, &head_oid, 0, NULL);
strbuf_release(&ref);

if (include_reflogs)
refs_for_each_reflog(get_worktree_ref_store(wt),
fsck_handle_reflog, wt);
}
free_worktrees(worktrees);

/*
* Not having any default heads isn't really fatal, but
@ -584,34 +603,36 @@ static void fsck_object_dir(const char *path)
stop_progress(&progress);
}

static int fsck_head_link(const char **head_points_at,
static int fsck_head_link(const char *head_ref_name,
const char **head_points_at,
struct object_id *head_oid)
{
int null_is_error = 0;

if (verbose)
fprintf(stderr, "Checking HEAD link\n");
fprintf(stderr, "Checking %s link\n", head_ref_name);

*head_points_at = resolve_ref_unsafe("HEAD", 0, head_oid, NULL);
*head_points_at = resolve_ref_unsafe(head_ref_name, 0, head_oid, NULL);
if (!*head_points_at) {
errors_found |= ERROR_REFS;
return error("Invalid HEAD");
return error("Invalid %s", head_ref_name);
}
if (!strcmp(*head_points_at, "HEAD"))
if (!strcmp(*head_points_at, head_ref_name))
/* detached HEAD */
null_is_error = 1;
else if (!starts_with(*head_points_at, "refs/heads/")) {
errors_found |= ERROR_REFS;
return error("HEAD points to something strange (%s)",
*head_points_at);
return error("%s points to something strange (%s)",
head_ref_name, *head_points_at);
}
if (is_null_oid(head_oid)) {
if (null_is_error) {
errors_found |= ERROR_REFS;
return error("HEAD: detached HEAD points at nothing");
return error("%s: detached HEAD points at nothing",
head_ref_name);
}
fprintf(stderr, "notice: HEAD points to an unborn branch (%s)\n",
*head_points_at + 11);
fprintf(stderr, "notice: %s points to an unborn branch (%s)\n",
head_ref_name, *head_points_at + 11);
}
return 0;
}

35
t/t1450-fsck.sh
View File

@ -101,6 +101,41 @@ test_expect_success 'HEAD link pointing at a funny place' '
grep "HEAD points to something strange" out
'

test_expect_success 'HEAD link pointing at a funny object (from different wt)' '
test_when_finished "mv .git/SAVED_HEAD .git/HEAD" &&
test_when_finished "rm -rf .git/worktrees wt" &&
git worktree add wt &&
mv .git/HEAD .git/SAVED_HEAD &&
echo $ZERO_OID >.git/HEAD &&
# avoid corrupt/broken HEAD from interfering with repo discovery
test_must_fail git -C wt fsck 2>out &&
grep "main-worktree/HEAD: detached HEAD points" out
'

test_expect_success 'other worktree HEAD link pointing at a funny object' '
test_when_finished "rm -rf .git/worktrees other" &&
git worktree add other &&
echo $ZERO_OID >.git/worktrees/other/HEAD &&
test_must_fail git fsck 2>out &&
grep "worktrees/other/HEAD: detached HEAD points" out
'

test_expect_success 'other worktree HEAD link pointing at missing object' '
test_when_finished "rm -rf .git/worktrees other" &&
git worktree add other &&
echo "Contents missing from repo" | git hash-object --stdin >.git/worktrees/other/HEAD &&
test_must_fail git fsck 2>out &&
grep "worktrees/other/HEAD: invalid sha1 pointer" out
'

test_expect_success 'other worktree HEAD link pointing at a funny place' '
test_when_finished "rm -rf .git/worktrees other" &&
git worktree add other &&
echo "ref: refs/funny/place" >.git/worktrees/other/HEAD &&
test_must_fail git fsck 2>out &&
grep "worktrees/other/HEAD points to something strange" out
'

test_expect_success 'email without @ is okay' '
git cat-file commit HEAD >basis &&
sed "s/@/AT/" basis >okay &&