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builtin-am: exit with user friendly message on failure

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Since ced9456 (Give the user a hint for how to continue in the case that
git-am fails because it requires user intervention, 2006-05-02), git-am
prints additional information on how the user can re-invoke git-am to
resume patch application after resolving the failure. Re-implement this
through the die_user_resolve() function.

Since cc12005 (Make git rebase interactive help match documentation.,
2006-05-13), git-am supports the --resolvemsg option which is used by
git-rebase to override the message printed out when git-am fails.
Re-implement this option.

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 21:51:38 +08:00 committed by Junio C Hamano
parent 5d28cf7819
commit 2d83109aab
1 changed files with 26 additions and 4 deletions
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30
builtin/am.c
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@ -83,6 +83,7 @@ struct am_state {
/* various operating modes and command line options */
int quiet;
const char *resolvemsg;
};
/**
@ -646,6 +647,25 @@ static int index_has_changes(struct strbuf *sb)
}
}
/**
* Dies with a user-friendly message on how to proceed after resolving the
* problem. This message can be overridden with state->resolvemsg.
*/
static void NORETURN die_user_resolve(const struct am_state *state)
{
if (state->resolvemsg) {
printf_ln("%s", state->resolvemsg);
} else {
const char *cmdline = "git am";
printf_ln(_("When you have resolved this problem, run \"%s --continue\"."), cmdline);
printf_ln(_("If you prefer to skip this patch, run \"%s --skip\" instead."), cmdline);
printf_ln(_("To restore the original branch and stop patching, run \"%s --abort\"."), cmdline);
}
exit(128);
}
/**
* Parses `mail` using git-mailinfo, extracting its patch and authorship info.
* state->msg will be set to the patch message. state->author_name,
@ -706,7 +726,7 @@ static int parse_mail(struct am_state *state, const char *mail)
if (is_empty_file(am_path(state, "patch"))) {
printf_ln(_("Patch is empty. Was it split wrong?"));
exit(128);
die_user_resolve(state);
}
strbuf_addstr(&msg, "\n\n");
@ -871,7 +891,7 @@ static void am_run(struct am_state *state, int resume)
printf_ln(_("The copy of the patch that failed is found in: %s"),
am_path(state, "patch"));
exit(128);
die_user_resolve(state);
}
do_commit(state);
@ -899,13 +919,13 @@ static void am_resolve(struct am_state *state)
printf_ln(_("No changes - did you forget to use 'git add'?\n"
"If there is nothing left to stage, chances are that something else\n"
"already introduced the same changes; you might want to skip this patch."));
exit(128);
die_user_resolve(state);
}
if (unmerged_cache()) {
printf_ln(_("You still have unmerged paths in your index.\n"
"Did you forget to use 'git add'?"));
exit(128);
die_user_resolve(state);
}
do_commit(state);
@ -1133,6 +1153,8 @@ int cmd_am(int argc, const char **argv, const char *prefix)
OPT_CALLBACK(0, "patch-format", &patch_format, N_("format"),
N_("format the patch(es) are in"),
parse_opt_patchformat),
OPT_STRING(0, "resolvemsg", &state.resolvemsg, NULL,
N_("override error message when patch failure occurs")),
OPT_CMDMODE(0, "continue", &resume,
N_("continue applying patches after resolving a conflict"),
RESUME_RESOLVED),