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diff.c: move read_index() code back to the caller 

This code is only needed for diff-tree (since f0c6b2a2fd ([PATCH]
Optimize diff-tree -[CM] --stdin - 2005-05-27)). Let the caller do the
preparation instead and avoid read_index() in diff.c code.

read_index() should be avoided (in addition to the_index) because it
uses get_index_file() underneath to get the path $GIT_DIR/index. This
effectively pulls the_repository in and may become the only reason to
pull a 'struct repository *' in diff.c. Let's keep the dependencies as
few as possible and kick it back to diff-tree.c

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2018-08-13 18:14:18 +02:00 committed by Junio C Hamano
parent 4dcd706fe4
commit ff7fe37b05
3 changed files with 5 additions and 14 deletions
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8
builtin/diff-tree.c
View File

@ -163,9 +163,11 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
int saved_nrl = 0;
int saved_dcctc = 0;
if (opt->diffopt.detect_rename)
opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
DIFF_SETUP_USE_CACHE);
if (opt->diffopt.detect_rename) {
if (!the_index.cache)
read_index(&the_index);
opt->diffopt.setup |= DIFF_SETUP_USE_SIZE_CACHE;
}
while (fgets(line, sizeof(line), stdin)) {
struct object_id oid;

10
diff.c
View File

@ -4414,16 +4414,6 @@ void diff_setup_done(struct diff_options *options)
if (options->detect_rename && options->rename_limit < 0)
options->rename_limit = diff_rename_limit_default;
if (options->setup & DIFF_SETUP_USE_CACHE) {
if (!active_cache)
/* read-cache does not die even when it fails
* so it is safe for us to do this here. Also
* it does not smudge active_cache or active_nr
* when it fails, so we do not have to worry about
* cleaning it up ourselves either.
*/
read_cache();
}
if (hexsz < options->abbrev)
options->abbrev = hexsz; /* full */

1
diff.h
View File

@ -312,7 +312,6 @@ void diff_change(struct diff_options *,
struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);
#define DIFF_SETUP_REVERSE 1
#define DIFF_SETUP_USE_CACHE 2
#define DIFF_SETUP_USE_SIZE_CACHE 4
/*