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git-fsck-objects: lacking default references should not be fatal

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The comment added says it all: if we have lost all references in a git
archive, git-fsck-objects should still work, so instead of dying it should
just notify the user about that condition.

This change was triggered by me just doing a "git-init-db" and then
populating that empty git archive with a pack/index file to look at it.
Having git-fsck-objects not work just because I didn't have any references
handy was rather irritating, since part of the reason for running
git-fsck-objects in the first place was to _find_ the missing references.

However, "--unreachable" really doesn't make sense in that situation, and
we want to turn it off to protect anybody who uses the old "git prune"
shell-script (rather than the modern built-in). The old pruning script
used to remove all objects that were reported as unreachable, and without
any refs, that obviously means everything - not worth it.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Linus Torvalds 2006-08-29 11:47:30 -07:00 committed by Junio C Hamano
parent 9e84801396
commit 071fa89e25
1 changed files with 17 additions and 2 deletions
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19
fsck-objects.c
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@ -425,8 +425,23 @@ static int fsck_handle_ref(const char *refname, const unsigned char *sha1)
static void get_default_heads(void)
{
for_each_ref(fsck_handle_ref);
if (!default_refs)
die("No default references");
/*
* Not having any default heads isn't really fatal, but
* it does mean that "--unreachable" no longer makes any
* sense (since in this case everything will obviously
* be unreachable by definition.
*
* Showing dangling objects is valid, though (as those
* dangling objects are likely lost heads).
*
* So we just print a warning about it, and clear the
* "show_unreachable" flag.
*/
if (!default_refs) {
error("No default references");
show_unreachable = 0;
}
}
static void fsck_object_dir(const char *path)