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builtin-am: rerere support

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git-am.sh will call git-rerere at the following events:

* "git rerere" when a three-way merge fails to record the conflicted
  automerge results. Since 8389b52 (git-rerere: reuse recorded resolve.,
  2006-01-28)

  * Since cb6020b (Teach --[no-]rerere-autoupdate option to merge,
    revert and friends, 2009-12-04), git-am.sh supports the
    --[no-]rerere-autoupdate option as well, and would pass it to
    git-rerere.

* "git rerere" when --resolved, to record the hand resolution. Since
  f131dd4 (rerere: record (or avoid misrecording) resolved, skipped or
  aborted rebase/am, 2006-12-08)

* "git rerere clear" when --skip-ing. Since f131dd4 (rerere: record (or
  avoid misrecording) resolved, skipped or aborted rebase/am,
  2006-12-08)

* "git rerere clear" when --abort-ing. Since 3e5057a (git am --abort,
  2008-07-16)

Re-implement the above in builtin/am.c.

Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Paul Tan 2015-08-04 21:51:59 +08:00 committed by Junio C Hamano
parent 7088f8078a
commit f1cb96d687
1 changed files with 25 additions and 0 deletions
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25
builtin/am.c
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@ -24,6 +24,7 @@
#include "revision.h"
#include "log-tree.h"
#include "notes-utils.h"
#include "rerere.h"
/**
* Returns 1 if the file is empty or does not exist, 0 otherwise.
@ -114,6 +115,7 @@ struct am_state {
const char *resolvemsg;
int committer_date_is_author_date;
int ignore_date;
int allow_rerere_autoupdate;
const char *sign_commit;
int rebasing;
};
@ -1312,6 +1314,7 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa
o.verbosity = 0;
if (merge_recursive_generic(&o, our_tree, his_tree, 1, bases, &result)) {
rerere(state->allow_rerere_autoupdate);
free(his_tree_name);
return error(_("Failed to merge in the changes."));
}
@ -1531,6 +1534,8 @@ static void am_resolve(struct am_state *state)
die_user_resolve(state);
}
rerere(0);
do_commit(state);
am_next(state);
@ -1630,6 +1635,21 @@ static int clean_index(const unsigned char *head, const unsigned char *remote)
return 0;
}
/**
* Resets rerere's merge resolution metadata.
*/
static void am_rerere_clear(void)
{
struct string_list merge_rr = STRING_LIST_INIT_DUP;
int fd = setup_rerere(&merge_rr, 0);
if (fd < 0)
return;
rerere_clear(&merge_rr);
string_list_clear(&merge_rr, 1);
}
/**
* Resume the current am session by skipping the current patch.
*/
@ -1637,6 +1657,8 @@ static void am_skip(struct am_state *state)
{
unsigned char head[GIT_SHA1_RAWSZ];
am_rerere_clear();
if (get_sha1("HEAD", head))
hashcpy(head, EMPTY_TREE_SHA1_BIN);
@ -1694,6 +1716,8 @@ static void am_abort(struct am_state *state)
return;
}
am_rerere_clear();
curr_branch = resolve_refdup("HEAD", 0, curr_head, NULL);
has_curr_head = !is_null_sha1(curr_head);
if (!has_curr_head)
@ -1823,6 +1847,7 @@ int cmd_am(int argc, const char **argv, const char *prefix)
N_("lie about committer date")),
OPT_BOOL(0, "ignore-date", &state.ignore_date,
N_("use current timestamp for author date")),
OPT_RERERE_AUTOUPDATE(&state.allow_rerere_autoupdate),
{ OPTION_STRING, 'S', "gpg-sign", &state.sign_commit, N_("key-id"),
N_("GPG-sign commits"),
PARSE_OPT_OPTARG, NULL, (intptr_t) "" },