Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx> writes:
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
Thanks for a re-roll.
> @@ -1383,11 +1376,13 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
> const char *index_file, *reflog_msg;
> char *nl, *p;
> unsigned char commit_sha1[20];
> + unsigned char head_sha1[20];
> struct ref_lock *ref_lock;
> struct commit_list *parents = NULL, **pptr = &parents;
> struct stat statbuf;
> int allow_fast_forward = 1;
> struct wt_status s;
> + struct commit *head_commit;
head_sha1[] is not initialized to NULs; neither is head_commit to NULL.
cmd_commit()
-> if it is an initial_commit, neither head_sha1[] nor head_commit
is defined;
-> prepare_to_commit()
-> is_a_merge(head_commit) gets called to see if this is an
empty non-merge commit if --amend was passed.
Attempting to --amend an initial commit should be an error and
parse_and_validate_options() checks that condition so the above is not
possible, but it still feels wrong.
Also wouldn't these three be equivalents?
head_commit == NULL
is_null_sha1(head_sha1)
initial_commit
Perhaps like this instead?
-- >8 --
Subject: commit: reduce use of redundant global variables
The file-scope global variable head_sha1[] was used to hold the object
name of the current HEAD commit (unless we are about to make an initial
commit). Also there is an independent "static int initial_commit".
Fix all the functions on the call-chain that use these two variables to
take a new "(const) struct commit *current_head" argument instead, and
replace their uses, e.g. "if (initial_commit)" becomes "if (!current_head)"
and a reference to "head_sha1" becomes "current_head->object.sha1".
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
builtin/commit.c | 87 ++++++++++++++++++++++++++++--------------------------
1 files changed, 45 insertions(+), 42 deletions(-)
diff --git a/builtin/commit.c b/builtin/commit.c
index e1af9b1..1a65319 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -62,8 +62,6 @@ N_("The previous cherry-pick is now empty, possibly due to conflict resolution.\
"\n"
"Otherwise, please use 'git reset'\n");
-static unsigned char head_sha1[20];
-
static const char *use_message_buffer;
static const char commit_editmsg[] = "COMMIT_EDITMSG";
static struct lock_file index_lock; /* real index */
@@ -102,7 +100,7 @@ static enum {
static char *cleanup_arg;
static enum commit_whence whence;
-static int use_editor = 1, initial_commit, include_status = 1;
+static int use_editor = 1, include_status = 1;
static int show_ignored_in_status;
static const char *only_include_assumed;
static struct strbuf message;
@@ -294,13 +292,13 @@ static void add_remove_files(struct string_list *list)
}
}
-static void create_base_index(void)
+static void create_base_index(const struct commit *current_head)
{
struct tree *tree;
struct unpack_trees_options opts;
struct tree_desc t;
- if (initial_commit) {
+ if (!current_head) {
discard_cache();
return;
}
@@ -313,7 +311,7 @@ static void create_base_index(void)
opts.dst_index = &the_index;
opts.fn = oneway_merge;
- tree = parse_tree_indirect(head_sha1);
+ tree = parse_tree_indirect(current_head->object.sha1);
if (!tree)
die(_("failed to unpack HEAD tree object"));
parse_tree(tree);
@@ -332,7 +330,8 @@ static void refresh_cache_or_die(int refresh_flags)
die_resolve_conflict("commit");
}
-static char *prepare_index(int argc, const char **argv, const char *prefix, int is_status)
+static char *prepare_index(int argc, const char **argv, const char *prefix,
+ const struct commit *current_head, int is_status)
{
int fd;
struct string_list partial;
@@ -448,7 +447,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
memset(&partial, 0, sizeof(partial));
partial.strdup_strings = 1;
- if (list_paths(&partial, initial_commit ? NULL : "HEAD", prefix, pathspec))
+ if (list_paths(&partial, !current_head ? NULL : "HEAD", prefix, pathspec))
exit(1);
discard_cache();
@@ -467,7 +466,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
(uintmax_t) getpid()),
LOCK_DIE_ON_ERROR);
- create_base_index();
+ create_base_index(current_head);
add_remove_files(&partial);
refresh_cache(REFRESH_QUIET);
@@ -516,12 +515,9 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix, int
return s->commitable;
}
-static int is_a_merge(const unsigned char *sha1)
+static int is_a_merge(const struct commit *current_head)
{
- struct commit *commit = lookup_commit(sha1);
- if (!commit || parse_commit(commit))
- die(_("could not parse HEAD commit"));
- return !!(commit->parents && commit->parents->next);
+ return !!(current_head->parents && current_head->parents->next);
}
static const char sign_off_header[] = "Signed-off-by: ";
@@ -625,6 +621,7 @@ static char *cut_ident_timestamp_part(char *string)
}
static int prepare_to_commit(const char *index_file, const char *prefix,
+ struct commit *current_head,
struct wt_status *s,
struct strbuf *author_ident)
{
@@ -846,7 +843,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
* empty due to conflict resolution, which the user should okay.
*/
if (!commitable && whence != FROM_MERGE && !allow_empty &&
- !(amend && is_a_merge(head_sha1))) {
+ !(amend && is_a_merge(current_head))) {
run_status(stdout, index_file, prefix, 0, s);
if (amend)
fputs(_(empty_amend_advice), stderr);
@@ -1004,6 +1001,7 @@ static const char *read_commit_message(const char *name)
static int parse_and_validate_options(int argc, const char *argv[],
const char * const usage[],
const char *prefix,
+ struct commit *current_head,
struct wt_status *s)
{
int f = 0;
@@ -1024,11 +1022,8 @@ static int parse_and_validate_options(int argc, const char *argv[],
if (!use_editor)
setenv("GIT_EDITOR", ":", 1);
- if (get_sha1("HEAD", head_sha1))
- initial_commit = 1;
-
/* Sanity check options */
- if (amend && initial_commit)
+ if (amend && !current_head)
die(_("You have nothing to amend."));
if (amend && whence != FROM_COMMIT)
die(_("You are in the middle of a %s -- cannot amend."), whence_s());
@@ -1100,12 +1095,12 @@ static int parse_and_validate_options(int argc, const char *argv[],
}
static int dry_run_commit(int argc, const char **argv, const char *prefix,
- struct wt_status *s)
+ const struct commit *current_head, struct wt_status *s)
{
int commitable;
const char *index_file;
- index_file = prepare_index(argc, argv, prefix, 1);
+ index_file = prepare_index(argc, argv, prefix, current_head, 1);
commitable = run_status(stdout, index_file, prefix, 0, s);
rollback_index_files();
@@ -1258,7 +1253,8 @@ int cmd_status(int argc, const char **argv, const char *prefix)
return 0;
}
-static void print_summary(const char *prefix, const unsigned char *sha1)
+static void print_summary(const char *prefix, const unsigned char *sha1,
+ int initial_commit)
{
struct rev_info rev;
struct commit *commit;
@@ -1380,12 +1376,13 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
struct strbuf author_ident = STRBUF_INIT;
const char *index_file, *reflog_msg;
char *nl, *p;
- unsigned char commit_sha1[20];
+ unsigned char sha1[20];
struct ref_lock *ref_lock;
struct commit_list *parents = NULL, **pptr = &parents;
struct stat statbuf;
int allow_fast_forward = 1;
struct wt_status s;
+ struct commit *current_head = NULL;
if (argc == 2 && !strcmp(argv[1], "-h"))
usage_with_options(builtin_commit_usage, builtin_commit_options);
@@ -1396,38 +1393,41 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
if (s.use_color == -1)
s.use_color = git_use_color_default;
+ if (get_sha1("HEAD", sha1))
+ current_head = NULL;
+ else {
+ current_head = lookup_commit(sha1);
+ if (!current_head || parse_commit(current_head))
+ die(_("could not parse HEAD commit"));
+ }
argc = parse_and_validate_options(argc, argv, builtin_commit_usage,
- prefix, &s);
+ prefix, current_head, &s);
if (dry_run) {
if (diff_use_color_default == -1)
diff_use_color_default = git_use_color_default;
- return dry_run_commit(argc, argv, prefix, &s);
+ return dry_run_commit(argc, argv, prefix, current_head, &s);
}
- index_file = prepare_index(argc, argv, prefix, 0);
+ index_file = prepare_index(argc, argv, prefix, current_head, 0);
/* Set up everything for writing the commit object. This includes
running hooks, writing the trees, and interacting with the user. */
- if (!prepare_to_commit(index_file, prefix, &s, &author_ident)) {
+ if (!prepare_to_commit(index_file, prefix,
+ current_head, &s, &author_ident)) {
rollback_index_files();
return 1;
}
/* Determine parents */
reflog_msg = getenv("GIT_REFLOG_ACTION");
- if (initial_commit) {
+ if (!current_head) {
if (!reflog_msg)
reflog_msg = "commit (initial)";
} else if (amend) {
struct commit_list *c;
- struct commit *commit;
if (!reflog_msg)
reflog_msg = "commit (amend)";
- commit = lookup_commit(head_sha1);
- if (!commit || parse_commit(commit))
- die(_("could not parse HEAD commit"));
-
- for (c = commit->parents; c; c = c->next)
+ for (c = current_head->parents; c; c = c->next)
pptr = &commit_list_insert(c->item, pptr)->next;
} else if (whence == FROM_MERGE) {
struct strbuf m = STRBUF_INIT;
@@ -1435,7 +1435,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
if (!reflog_msg)
reflog_msg = "commit (merge)";
- pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
+ pptr = &commit_list_insert(current_head, pptr)->next;
fp = fopen(git_path("MERGE_HEAD"), "r");
if (fp == NULL)
die_errno(_("could not open '%s' for reading"),
@@ -1461,7 +1461,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
reflog_msg = (whence == FROM_CHERRY_PICK)
? "commit (cherry-pick)"
: "commit";
- pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
+ pptr = &commit_list_insert(current_head, pptr)->next;
}
/* Finally, get the commit message */
@@ -1487,7 +1487,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
exit(1);
}
- if (commit_tree(sb.buf, active_cache_tree->sha1, parents, commit_sha1,
+ if (commit_tree(sb.buf, active_cache_tree->sha1, parents, sha1,
author_ident.buf)) {
rollback_index_files();
die(_("failed to write commit object"));
@@ -1495,7 +1495,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
strbuf_release(&author_ident);
ref_lock = lock_any_ref_for_update("HEAD",
- initial_commit ? NULL : head_sha1,
+ !current_head
+ ? NULL
+ : current_head->object.sha1,
0);
nl = strchr(sb.buf, '\n');
@@ -1510,7 +1512,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
rollback_index_files();
die(_("cannot lock HEAD ref"));
}
- if (write_ref_sha1(ref_lock, commit_sha1, sb.buf) < 0) {
+ if (write_ref_sha1(ref_lock, sha1, sb.buf) < 0) {
rollback_index_files();
die(_("cannot update HEAD ref"));
}
@@ -1532,13 +1534,14 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
struct notes_rewrite_cfg *cfg;
cfg = init_copy_notes_for_rewrite("amend");
if (cfg) {
- copy_note_for_rewrite(cfg, head_sha1, commit_sha1);
+ /* we are amending, so current_head is not NULL */
+ copy_note_for_rewrite(cfg, current_head->object.sha1, sha1);
finish_copy_notes_for_rewrite(cfg);
}
- run_rewrite_hook(head_sha1, commit_sha1);
+ run_rewrite_hook(current_head->object.sha1, sha1);
}
if (!quiet)
- print_summary(prefix, commit_sha1);
+ print_summary(prefix, sha1, !current_head);
return 0;
}
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html