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read-cache: refactor read_index_from()

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It looks better and is simpler to review when we don't compute
the same things many times in the function.

It will also help make the following commit simpler.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Christian Couder 2017-03-06 10:42:00 +01:00 committed by Junio C Hamano
parent c0441f7ef3
commit de6ae5f9e3
1 changed files with 8 additions and 6 deletions
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14
read-cache.c
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@ -1699,6 +1699,8 @@ int read_index_from(struct index_state *istate, const char *path)
{
struct split_index *split_index;
int ret;
char *base_sha1_hex;
const char *base_path;
/* istate->initialized covers both .git/index and .git/sharedindex.xxx */
if (istate->initialized)
@ -1716,15 +1718,15 @@ int read_index_from(struct index_state *istate, const char *path)
discard_index(split_index->base);
else
split_index->base = xcalloc(1, sizeof(*split_index->base));
ret = do_read_index(split_index->base,
git_path("sharedindex.%s",
sha1_to_hex(split_index->base_sha1)), 1);
base_sha1_hex = sha1_to_hex(split_index->base_sha1);
base_path = git_path("sharedindex.%s", base_sha1_hex);
ret = do_read_index(split_index->base, base_path, 1);
if (hashcmp(split_index->base_sha1, split_index->base->sha1))
die("broken index, expect %s in %s, got %s",
sha1_to_hex(split_index->base_sha1),
git_path("sharedindex.%s",
sha1_to_hex(split_index->base_sha1)),
base_sha1_hex, base_path,
sha1_to_hex(split_index->base->sha1));
merge_base_index(istate);
post_read_index_from(istate);
return ret;