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builtin rebase: add support for custom merge strategies

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When running a rebase in non-am mode, it uses the recursive merge to
cherry-pick the commits, and the rebase command allows to configure
the merge strategy to be used in this operation.

This commit adds that support to the builtin rebase.

Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Pratik Karki 2018-09-04 15:00:11 -07:00 committed by Junio C Hamano
parent 92d0d74e8d
commit ba1905a5fe
1 changed files with 57 additions and 0 deletions
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57
builtin/rebase.c
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@ -96,6 +96,7 @@ struct rebase_options {
char *cmd;
int allow_empty_message;
int rebase_merges, rebase_cousins;
char *strategy, *strategy_opts;
};
static int is_interactive(struct rebase_options *opts)
@ -217,6 +218,22 @@ static int read_basic_state(struct rebase_options *opts)
opts->gpg_sign_opt = xstrdup(buf.buf);
}
if (file_exists(state_dir_path("strategy", opts))) {
strbuf_reset(&buf);
if (read_one(state_dir_path("strategy", opts), &buf))
return -1;
free(opts->strategy);
opts->strategy = xstrdup(buf.buf);
}
if (file_exists(state_dir_path("strategy_opts", opts))) {
strbuf_reset(&buf);
if (read_one(state_dir_path("strategy_opts", opts), &buf))
return -1;
free(opts->strategy_opts);
opts->strategy_opts = xstrdup(buf.buf);
}
strbuf_release(&buf);
return 0;
@ -356,6 +373,8 @@ static int run_specific_rebase(struct rebase_options *opts)
opts->rebase_merges ? "t" : "");
add_var(&script_snippet, "rebase_cousins",
opts->rebase_cousins ? "t" : "");
add_var(&script_snippet, "strategy", opts->strategy);
add_var(&script_snippet, "strategy_opts", opts->strategy_opts);
switch (opts->type) {
case REBASE_AM:
@ -633,6 +652,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
struct string_list exec = STRING_LIST_INIT_NODUP;
const char *rebase_merges = NULL;
int fork_point = -1;
struct string_list strategy_options = STRING_LIST_INIT_NODUP;
struct option builtin_rebase_options[] = {
OPT_STRING(0, "onto", &options.onto_name,
N_("revision"),
@ -718,6 +738,12 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
PARSE_OPT_OPTARG, NULL, (intptr_t)""},
OPT_BOOL(0, "fork-point", &fork_point,
N_("use 'merge-base --fork-point' to refine upstream")),
OPT_STRING('s', "strategy", &options.strategy,
N_("strategy"), N_("use the given merge strategy")),
OPT_STRING_LIST('X', "strategy-option", &strategy_options,
N_("option"),
N_("pass the argument through to the merge "
"strategy")),
OPT_END(),
};
@ -964,6 +990,37 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
imply_interactive(&options, "--rebase-merges");
}
if (strategy_options.nr) {
int i;
if (!options.strategy)
options.strategy = "recursive";
strbuf_reset(&buf);
for (i = 0; i < strategy_options.nr; i++)
strbuf_addf(&buf, " --%s",
strategy_options.items[i].string);
options.strategy_opts = xstrdup(buf.buf);
}
if (options.strategy) {
options.strategy = xstrdup(options.strategy);
switch (options.type) {
case REBASE_AM:
die(_("--strategy requires --merge or --interactive"));
case REBASE_MERGE:
case REBASE_INTERACTIVE:
case REBASE_PRESERVE_MERGES:
/* compatible */
break;
case REBASE_UNSPECIFIED:
options.type = REBASE_MERGE;
break;
default:
BUG("unhandled rebase type (%d)", options.type);
}
}
switch (options.type) {
case REBASE_MERGE:
case REBASE_INTERACTIVE: