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apply: learn to use a different index file

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Sometimes we want to apply in a different index file.

Before the apply functionality was libified it was possible to
use the GIT_INDEX_FILE environment variable, for this purpose.

But now, as the apply functionality has been libified, it should
be possible to do that in a libified way.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Christian Couder 2016-09-04 22:18:32 +02:00 committed by Junio C Hamano
parent b4290342dd
commit 5b0b57fd91
2 changed files with 22 additions and 6 deletions
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27
apply.c
View File

@ -3993,12 +3993,21 @@ static int check_patch_list(struct apply_state *state, struct patch *patch)
return err;
}
static int read_apply_cache(struct apply_state *state)
{
if (state->index_file)
return read_cache_from(state->index_file);
else
return read_cache();
}
/* This function tries to read the sha1 from the current index */
static int get_current_sha1(const char *path, unsigned char *sha1)
static int get_current_sha1(struct apply_state *state, const char *path,
unsigned char *sha1)
{
int pos;
if (read_cache() < 0)
if (read_apply_cache(state) < 0)
return -1;
pos = cache_name_pos(path, strlen(path));
if (pos < 0)
@ -4071,7 +4080,7 @@ static int build_fake_ancestor(struct apply_state *state, struct patch *list)
; /* ok */
} else if (!patch->lines_added && !patch->lines_deleted) {
/* mode-only change: update the current */
if (get_current_sha1(patch->old_name, sha1))
if (get_current_sha1(state, patch->old_name, sha1))
return error("mode change for %s, which is not "
"in current HEAD", name);
} else
@ -4675,10 +4684,16 @@ static int apply_patch(struct apply_state *state,
state->apply = 0;
state->update_index = state->check_index && state->apply;
if (state->update_index && state->newfd < 0)
state->newfd = hold_locked_index(state->lock_file, 1);
if (state->update_index && state->newfd < 0) {
if (state->index_file)
state->newfd = hold_lock_file_for_update(state->lock_file,
state->index_file,
LOCK_DIE_ON_ERROR);
else
state->newfd = hold_locked_index(state->lock_file, 1);
}
if (state->check_index && read_cache() < 0) {
if (state->check_index && read_apply_cache(state) < 0) {
error(_("unable to read index file"));
res = -128;
goto end;

1
apply.h
View File

@ -63,6 +63,7 @@ struct apply_state {
int unsafe_paths;
/* Other non boolean parameters */
const char *index_file;
enum apply_verbosity apply_verbosity;
const char *fake_ancestor;
const char *patch_input_file;