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#include "diff-merges.h"
#include "revision.h"
static void suppress(struct rev_info *revs)
{
revs->separate_merges = 0;
revs->first_parent_merges = 0;
revs->combine_merges = 0;
revs->dense_combined_merges = 0;
revs->combined_all_paths = 0;
revs->combined_imply_patch = 0;
revs->merges_need_diff = 0;
}
static void set_separate(struct rev_info *revs)
{
suppress(revs);
revs->separate_merges = 1;
}
static void set_first_parent(struct rev_info *revs)
{
set_separate(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 full diff for merges". Set
* both fields appropriately.
*/
set_separate(revs);
revs->match_missing = 1;
}
static void set_combined(struct rev_info *revs)
{
suppress(revs);
revs->combine_merges = 1;
revs->dense_combined_merges = 0;
}
static void set_dense_combined(struct rev_info *revs)
{
suppress(revs);
revs->combine_merges = 1;
revs->dense_combined_merges = 1;
}
static void set_diff_merges(struct rev_info *revs, const char *optarg)
{
if (!strcmp(optarg, "off") || !strcmp(optarg, "none")) {
suppress(revs);
/* Return early to leave revs->merges_need_diff unset */
return;
}
if (!strcmp(optarg, "first-parent"))
set_first_parent(revs);
else if (!strcmp(optarg, "m") || !strcmp(optarg, "separate"))
set_separate(revs);
else if (!strcmp(optarg, "c") || !strcmp(optarg, "combined"))
set_combined(revs);
else if (!strcmp(optarg, "cc") || !strcmp(optarg, "dense-combined"))
set_dense_combined(revs);
else
die(_("unknown value for --diff-merges: %s"), optarg);
/* The flag is cleared by set_xxx() functions, so don't move this up */
revs->merges_need_diff = 1;
}
/*
* Public functions. They are in the order they are called.
*/
int diff_merges_parse_opts(struct rev_info *revs, const char **argv)
{
int argcount = 1;
const char *optarg;
const char *arg = argv[0];
if (!strcmp(arg, "-m")) {
set_m(revs);
} else if (!strcmp(arg, "-c")) {
set_combined(revs);
revs->combined_imply_patch = 1;
} else if (!strcmp(arg, "--cc")) {
set_dense_combined(revs);
revs->combined_imply_patch = 1;
} else if (!strcmp(arg, "--no-diff-merges")) {
suppress(revs);
} else if (!strcmp(arg, "--combined-all-paths")) {
revs->combined_all_paths = 1;
} else if ((argcount = parse_long_opt("diff-merges", argv, &optarg))) {
set_diff_merges(revs, optarg);
} else
return 0;
revs->explicit_diff_merges = 1;
return argcount;
}
void diff_merges_suppress(struct rev_info *revs)
{
suppress(revs);
}
void diff_merges_default_to_first_parent(struct rev_info *revs)
{
if (!revs->explicit_diff_merges)
revs->separate_merges = 1;
if (revs->separate_merges)
revs->first_parent_merges = 1;
}
void diff_merges_default_to_dense_combined(struct rev_info *revs)
{
if (!revs->explicit_diff_merges)
set_dense_combined(revs);
}
void diff_merges_set_dense_combined_if_unset(struct rev_info *revs)
{
if (!revs->combine_merges)
set_dense_combined(revs);
}
void diff_merges_setup_revs(struct rev_info *revs)
{
if (revs->combine_merges == 0)
revs->dense_combined_merges = 0;
if (revs->separate_merges == 0)
revs->first_parent_merges = 0;
if (revs->combined_all_paths && !revs->combine_merges)
die("--combined-all-paths makes no sense without -c or --cc");
if (revs->combined_imply_patch)
revs->diff = 1;
if (revs->combined_imply_patch || revs->merges_need_diff) {
if (!revs->diffopt.output_format)
revs->diffopt.output_format = DIFF_FORMAT_PATCH;
}
}
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