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Be more user-friendly when refusing to do something because of conflict.

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Various commands refuse to run in the presence of conflicts (commit,
merge, pull, cherry-pick/revert). They all used to provide rough, and
inconsistant error messages.

A new variable advice.resolveconflict is introduced, and allows more
verbose messages, pointing the user to the appropriate solution.

For commit, the error message used to look like this:

$ git commit
foo.txt: needs merge
foo.txt: unmerged (c34a92682e0394bc0d6f4d4a67a8e2d32395c169)
foo.txt: unmerged (3afcd75de8de0bb5076942fcb17446be50451030)
foo.txt: unmerged (c9785d77b76dfe4fb038bf927ee518f6ae45ede4)
error: Error building trees

The "need merge" line is given by refresh_cache. We add the IN_PORCELAIN
option to make the output more consistant with the other porcelain
commands, and catch the error in return, to stop with a clean error
message. The next lines were displayed by a call to cache_tree_update(),
which is not reached anymore if we noticed the conflict.

The new output looks like:

U       foo.txt
fatal: 'commit' is not possible because you have unmerged files.
Please, fix them up in the work tree, and then use 'git add/rm <file>' as
appropriate to mark resolution and make a commit, or use 'git commit -a'.

Pull is slightly modified to abort immediately if $GIT_DIR/MERGE_HEAD
exists instead of waiting for merge to complain.

The behavior of merge and the test-case are slightly modified to reflect
the usual flow: start with conflicts, fix them, and afterwards get rid of
MERGE_HEAD, with different error messages at each stage.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Matthieu Moy
2010-01-12 10:54:44 +01:00
committed by Junio C Hamano
parent 902f235378
commit d38a30df7d
9 changed files with 93 additions and 13 deletions
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15
builtin-revert.c
View File

@ -233,6 +233,19 @@ static struct tree *empty_tree(void)
return tree;
}
static NORETURN void die_dirty_index(const char *me)
{
if (read_cache_unmerged()) {
die_resolve_conflict(me);
} else {
if (advice_commit_before_merge)
die("Your local changes would be overwritten by %s.\n"
"Please, commit your changes or stash them to proceed.", me);
else
die("Your local changes would be overwritten by %s.\n", me);
}
}
static int revert_or_cherry_pick(int argc, const char **argv)
{
unsigned char head[20];
@ -269,7 +282,7 @@ static int revert_or_cherry_pick(int argc, const char **argv)
if (get_sha1("HEAD", head))
die ("You do not have a valid HEAD");
if (index_differs_from("HEAD", 0))
die ("Dirty index: cannot %s", me);
die_dirty_index(me);
}
discard_cache();