From: Paul Tan <pyokagan@gmail.com>
To: git@vger.kernel.org
Cc: Johannes Schindelin <johannes.schindelin@gmx.de>,
Stefan Beller <sbeller@google.com>, Paul Tan <pyokagan@gmail.com>
Subject: [PATCH v5 13/44] builtin-am: implement --abort
Date: Tue, 7 Jul 2015 22:20:31 +0800 [thread overview]
Message-ID: <1436278862-2638-14-git-send-email-pyokagan@gmail.com> (raw)
In-Reply-To: <1436278862-2638-1-git-send-email-pyokagan@gmail.com>
Since 3e5057a (git am --abort, 2008-07-16), git-am supported the --abort
option that will rewind HEAD back to the original commit. Re-implement
this through am_abort().
Since 7b3b7e3 (am --abort: keep unrelated commits since the last failure
and warn, 2010-12-21), to prevent commits made since the last failure
from being lost, git-am will not rewind HEAD back to the original
commit if HEAD moved since the last failure. Re-implement this through
safe_to_abort().
Signed-off-by: Paul Tan <pyokagan@gmail.com>
---
builtin/am.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 99 insertions(+), 3 deletions(-)
diff --git a/builtin/am.c b/builtin/am.c
index 5087094..1db95f2 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -507,6 +507,8 @@ static int split_mail(struct am_state *state, enum patch_format patch_format,
static void am_setup(struct am_state *state, enum patch_format patch_format,
const char **paths)
{
+ unsigned char curr_head[GIT_SHA1_RAWSZ];
+
if (!patch_format)
patch_format = detect_patch_format(paths);
@@ -523,6 +525,14 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
die(_("Failed to split patches."));
}
+ if (!get_sha1("HEAD", curr_head)) {
+ write_file(am_path(state, "abort-safety"), 1, "%s", sha1_to_hex(curr_head));
+ update_ref("am", "ORIG_HEAD", curr_head, NULL, 0, UPDATE_REFS_DIE_ON_ERR);
+ } else {
+ write_file(am_path(state, "abort-safety"), 1, "%s", "");
+ delete_ref("ORIG_HEAD", NULL, 0);
+ }
+
/*
* NOTE: Since the "next" and "last" files determine if an am_state
* session is in progress, they should be written last.
@@ -539,6 +549,8 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
*/
static void am_next(struct am_state *state)
{
+ unsigned char head[GIT_SHA1_RAWSZ];
+
if (state->author_name)
free(state->author_name);
state->author_name = NULL;
@@ -559,6 +571,11 @@ static void am_next(struct am_state *state)
unlink(am_path(state, "author-script"));
unlink(am_path(state, "final-commit"));
+ if (!get_sha1("HEAD", head))
+ write_file(am_path(state, "abort-safety"), 1, "%s", sha1_to_hex(head));
+ else
+ write_file(am_path(state, "abort-safety"), 1, "%s", "");
+
state->cur++;
write_file(am_path(state, "next"), 1, "%d", state->cur);
}
@@ -791,10 +808,14 @@ static void am_run(struct am_state *state)
const char *argv_gc_auto[] = {"gc", "--auto", NULL};
struct strbuf sb = STRBUF_INIT;
+ unlink(am_path(state, "dirtyindex"));
+
refresh_and_write_cache();
- if (index_has_changes(&sb))
+ if (index_has_changes(&sb)) {
+ write_file(am_path(state, "dirtyindex"), 1, "t");
die(_("Dirty index: cannot apply patches (dirty: %s)"), sb.buf);
+ }
strbuf_release(&sb);
@@ -982,6 +1003,74 @@ static void am_skip(struct am_state *state)
}
/**
+ * Returns true if it is safe to reset HEAD to the ORIG_HEAD, false otherwise.
+ *
+ * It is not safe to reset HEAD when:
+ * 1. git-am previously failed because the index was dirty.
+ * 2. HEAD has moved since git-am previously failed.
+ */
+static int safe_to_abort(const struct am_state *state)
+{
+ struct strbuf sb = STRBUF_INIT;
+ unsigned char abort_safety[GIT_SHA1_RAWSZ], head[GIT_SHA1_RAWSZ];
+
+ if (file_exists(am_path(state, "dirtyindex")))
+ return 0;
+
+ if (read_state_file(&sb, state, "abort-safety", 1) > 0) {
+ if (get_sha1_hex(sb.buf, abort_safety))
+ die(_("could not parse %s"), am_path(state, "abort_safety"));
+ } else
+ hashclr(abort_safety);
+
+ if (get_sha1("HEAD", head))
+ hashclr(head);
+
+ if (!hashcmp(head, abort_safety))
+ return 1;
+
+ error(_("You seem to have moved HEAD since the last 'am' failure.\n"
+ "Not rewinding to ORIG_HEAD"));
+
+ return 0;
+}
+
+/**
+ * Aborts the current am session if it is safe to do so.
+ */
+static void am_abort(struct am_state *state)
+{
+ unsigned char curr_head[GIT_SHA1_RAWSZ], orig_head[GIT_SHA1_RAWSZ];
+ int has_curr_head, has_orig_head;
+ const char *curr_branch;
+
+ if (!safe_to_abort(state)) {
+ am_destroy(state);
+ return;
+ }
+
+ curr_branch = resolve_refdup("HEAD", 0, curr_head, NULL);
+ has_curr_head = !is_null_sha1(curr_head);
+ if (!has_curr_head)
+ hashcpy(curr_head, EMPTY_TREE_SHA1_BIN);
+
+ has_orig_head = !get_sha1("ORIG_HEAD", orig_head);
+ if (!has_orig_head)
+ hashcpy(orig_head, EMPTY_TREE_SHA1_BIN);
+
+ clean_index(curr_head, orig_head);
+
+ if (has_orig_head)
+ update_ref("am --abort", "HEAD", orig_head,
+ has_curr_head ? curr_head : NULL, 0,
+ UPDATE_REFS_DIE_ON_ERR);
+ else if (curr_branch)
+ delete_ref(curr_branch, NULL, REF_NODEREF);
+
+ am_destroy(state);
+}
+
+/**
* parse_options() callback that validates and sets opt->value to the
* PATCH_FORMAT_* enum value corresponding to `arg`.
*/
@@ -999,7 +1088,8 @@ static int parse_opt_patchformat(const struct option *opt, const char *arg, int
enum resume_mode {
RESUME_FALSE = 0,
RESUME_RESOLVED,
- RESUME_SKIP
+ RESUME_SKIP,
+ RESUME_ABORT
};
int cmd_am(int argc, const char **argv, const char *prefix)
@@ -1010,7 +1100,7 @@ int cmd_am(int argc, const char **argv, const char *prefix)
const char * const usage[] = {
N_("git am [options] [(<mbox>|<Maildir>)...]"),
- N_("git am [options] (--continue | --skip)"),
+ N_("git am [options] (--continue | --skip | --abort)"),
NULL
};
@@ -1027,6 +1117,9 @@ int cmd_am(int argc, const char **argv, const char *prefix)
OPT_CMDMODE(0, "skip", &resume,
N_("skip the current patch"),
RESUME_SKIP),
+ OPT_CMDMODE(0, "abort", &resume,
+ N_("restore the original branch and abort the patching operation."),
+ RESUME_ABORT),
OPT_END()
};
@@ -1085,6 +1178,9 @@ int cmd_am(int argc, const char **argv, const char *prefix)
case RESUME_SKIP:
am_skip(&state);
break;
+ case RESUME_ABORT:
+ am_abort(&state);
+ break;
default:
die("BUG: invalid resume value");
}
--
2.5.0.rc1.76.gf60a929
next prev parent reply other threads:[~2015-07-07 14:22 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-07 14:20 [PATCH v5 00/44] Make git-am a builtin Paul Tan
2015-07-07 14:20 ` [PATCH v5 01/44] wrapper: implement xopen() Paul Tan
2015-07-07 14:20 ` [PATCH v5 02/44] wrapper: implement xfopen() Paul Tan
2015-07-07 14:20 ` [PATCH v5 03/44] builtin-am: implement skeletal builtin am Paul Tan
2015-07-07 14:20 ` [PATCH v5 04/44] builtin-am: implement patch queue mechanism Paul Tan
2015-07-07 14:20 ` [PATCH v5 05/44] builtin-am: split out mbox/maildir patches with git-mailsplit Paul Tan
2015-07-07 14:20 ` [PATCH v5 06/44] builtin-am: auto-detect mbox patches Paul Tan
2015-07-07 14:20 ` [PATCH v5 07/44] builtin-am: extract patch and commit info with git-mailinfo Paul Tan
2015-07-07 14:20 ` [PATCH v5 08/44] builtin-am: apply patch with git-apply Paul Tan
2015-07-07 14:20 ` [PATCH v5 09/44] builtin-am: implement committing applied patch Paul Tan
2015-07-07 14:20 ` [PATCH v5 10/44] builtin-am: refuse to apply patches if index is dirty Paul Tan
2015-07-07 14:20 ` [PATCH v5 11/44] builtin-am: implement --resolved/--continue Paul Tan
2015-07-07 14:20 ` [PATCH v5 12/44] builtin-am: implement --skip Paul Tan
2015-07-13 19:05 ` Stefan Beller
2015-07-14 9:34 ` Paul Tan
2015-07-14 16:54 ` Stefan Beller
2015-07-18 15:22 ` Paul Tan
2015-07-07 14:20 ` Paul Tan [this message]
2015-07-07 14:20 ` [PATCH v5 14/44] builtin-am: reject patches when there's a session in progress Paul Tan
2015-07-07 14:20 ` [PATCH v5 15/44] builtin-am: implement -q/--quiet Paul Tan
2015-07-07 14:20 ` [PATCH v5 16/44] builtin-am: exit with user friendly message on failure Paul Tan
2015-07-07 14:20 ` [PATCH v5 17/44] builtin-am: implement -s/--signoff Paul Tan
2015-07-07 14:20 ` [PATCH v5 18/44] cache-tree: introduce write_index_as_tree() Paul Tan
2015-07-07 20:10 ` Junio C Hamano
2015-07-07 14:20 ` [PATCH v5 19/44] builtin-am: implement --3way, am.threeWay Paul Tan
2015-07-07 20:14 ` Junio C Hamano
2015-07-14 9:32 ` Paul Tan
2015-07-07 14:20 ` [PATCH v5 20/44] builtin-am: implement --rebasing mode Paul Tan
2015-07-07 14:20 ` [PATCH v5 21/44] builtin-am: bypass git-mailinfo when --rebasing Paul Tan
2015-07-07 14:20 ` [PATCH v5 22/44] builtin-am: handle stray state directory Paul Tan
2015-07-07 14:20 ` [PATCH v5 23/44] builtin-am: implement -u/--utf8 Paul Tan
2015-07-07 14:20 ` [PATCH v5 24/44] builtin-am: implement -k/--keep, --keep-non-patch Paul Tan
2015-07-07 14:20 ` [PATCH v5 25/44] builtin-am: implement --[no-]message-id, am.messageid Paul Tan
2015-07-07 14:20 ` [PATCH v5 26/44] builtin-am: support --keep-cr, am.keepcr Paul Tan
2015-07-07 14:20 ` [PATCH v5 27/44] builtin-am: implement --[no-]scissors Paul Tan
2015-07-07 14:20 ` [PATCH v5 28/44] builtin-am: pass git-apply's options to git-apply Paul Tan
2015-07-07 14:20 ` [PATCH v5 29/44] builtin-am: implement --ignore-date Paul Tan
2015-07-07 14:20 ` [PATCH v5 30/44] builtin-am: implement --committer-date-is-author-date Paul Tan
2015-07-07 14:20 ` [PATCH v5 31/44] builtin-am: implement -S/--gpg-sign, commit.gpgsign Paul Tan
2015-07-07 14:20 ` [PATCH v5 32/44] builtin-am: invoke post-rewrite hook Paul Tan
2015-07-07 14:20 ` [PATCH v5 33/44] builtin-am: support automatic notes copying Paul Tan
2015-07-07 14:20 ` [PATCH v5 34/44] builtin-am: invoke applypatch-msg hook Paul Tan
2015-07-07 14:20 ` [PATCH v5 35/44] builtin-am: invoke pre-applypatch hook Paul Tan
2015-07-07 14:20 ` [PATCH v5 36/44] builtin-am: invoke post-applypatch hook Paul Tan
2015-07-07 14:20 ` [PATCH v5 37/44] builtin-am: rerere support Paul Tan
2015-07-07 14:20 ` [PATCH v5 38/44] builtin-am: support and auto-detect StGit patches Paul Tan
2015-07-07 14:20 ` [PATCH v5 39/44] builtin-am: support and auto-detect StGit series files Paul Tan
2015-07-07 14:20 ` [PATCH v5 40/44] builtin-am: support and auto-detect mercurial patches Paul Tan
2015-07-07 14:20 ` [PATCH v5 41/44] builtin-am: implement -i/--interactive Paul Tan
2015-07-07 14:21 ` [PATCH v5 42/44] builtin-am: implement legacy -b/--binary option Paul Tan
2015-07-07 14:21 ` [PATCH v5 43/44] builtin-am: check for valid committer ident Paul Tan
2015-07-07 14:21 ` [PATCH v5 44/44] builtin-am: remove redirection to git-am.sh Paul Tan
2015-07-07 18:52 ` [PATCH v5 00/44] Make git-am a builtin Junio C Hamano
2015-07-07 19:25 ` Paul Tan
2015-07-08 7:31 ` Junio C Hamano
2015-07-08 7:44 ` Paul Tan
2015-07-08 7:48 ` Junio C Hamano
2015-07-08 8:19 ` Paul Tan
2015-07-09 6:00 ` Junio C Hamano
2015-07-12 12:29 ` Paul Tan
2015-07-12 17:32 ` Junio C Hamano
2015-07-13 22:31 ` Junio C Hamano
2015-07-14 10:08 ` Paul Tan
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