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diff-merges: move specific diff-index "-m" handling to diff-index

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Move specific handling of "-m" for diff-index to diff-index.c, so
diff-merges is left to handle only diff for merges options.

Being a better design by itself, this is especially essential in
preparation for letting -m imply -p, as "diff-index -m" obviously
should not imply -p, as it's entirely unrelated.

To handle this, in addition to moving specific diff-index "-m" code
out of diff-merges, we introduce new

  diff_merges_suppress_options_parsing()

and call it before generic options processing in cmd_diff_index().

This new diff_merges_suppress_options_parsing() could then be reused
and called before invocations of setup_revisions() for other commands
that don't need --diff-merges options, but that's outside of the scope
of these patch series.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Sergey Organov 2021-05-21 00:46:59 +03:00 committed by Junio C Hamano
parent e0b16421b1
commit 19b2517f95
3 changed files with 24 additions and 12 deletions
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9
builtin/diff-index.c
View file

@ -2,6 +2,7 @@
#include "cache.h"
#include "config.h"
#include "diff.h"
#include "diff-merges.h"
#include "commit.h"
#include "revision.h"
#include "builtin.h"
@ -27,6 +28,12 @@ int cmd_diff_index(int argc, const char **argv, const char *prefix)
rev.abbrev = 0;
prefix = precompose_argv_prefix(argc, argv, prefix);
/*
* We need no diff for merges options, and we need to avoid conflict
* with our own meaning of "-m".
*/
diff_merges_suppress_options_parsing();
argc = setup_revisions(argc, argv, &rev, NULL);
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
@ -35,6 +42,8 @@ int cmd_diff_index(int argc, const char **argv, const char *prefix)
option |= DIFF_INDEX_CACHED;
else if (!strcmp(arg, "--merge-base"))
option |= DIFF_INDEX_MERGE_BASE;
else if (!strcmp(arg, "-m"))
rev.match_missing = 1;
else
usage(diff_cache_usage);
}

25
diff-merges.c
View file

@ -6,6 +6,7 @@ typedef void (*diff_merges_setup_func_t)(struct rev_info *);
static void set_separate(struct rev_info *revs);
static diff_merges_setup_func_t set_to_default = set_separate;
static int suppress_parsing;
static void suppress(struct rev_info *revs)
{
@ -30,17 +31,6 @@ static void set_first_parent(struct rev_info *revs)
revs->first_parent_merges = 1;
}
static void set_m(struct rev_info *revs)
{
/*
* To "diff-index", "-m" means "match missing", and to the "log"
* family of commands, it means "show default diff for merges". Set
* both fields appropriately.
*/
set_to_default(revs);
revs->match_missing = 1;
}
static void set_combined(struct rev_info *revs)
{
suppress(revs);
@ -101,14 +91,22 @@ int diff_merges_config(const char *value)
return 0;
}
void diff_merges_suppress_options_parsing(void)
{
suppress_parsing = 1;
}
int diff_merges_parse_opts(struct rev_info *revs, const char **argv)
{
int argcount = 1;
const char *optarg;
const char *arg = argv[0];
if (suppress_parsing)
return 0;
if (!strcmp(arg, "-m")) {
set_m(revs);
set_to_default(revs);
} else if (!strcmp(arg, "-c")) {
set_combined(revs);
revs->combined_imply_patch = 1;
@ -155,6 +153,9 @@ void diff_merges_set_dense_combined_if_unset(struct rev_info *revs)
void diff_merges_setup_revs(struct rev_info *revs)
{
if (suppress_parsing)
return;
if (revs->combine_merges == 0)
revs->dense_combined_merges = 0;
if (revs->separate_merges == 0)

2
diff-merges.h
View file

@ -11,6 +11,8 @@ struct rev_info;
int diff_merges_config(const char *value);
void diff_merges_suppress_options_parsing(void);
int diff_merges_parse_opts(struct rev_info *revs, const char **argv);
void diff_merges_suppress(struct rev_info *revs);