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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@pobox.com>
This commit is contained in:
Junio C Hamano
parent
f696543dad
commit
06bb643b72
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@ -62,8 +62,6 @@ N_("The previous cherry-pick is now empty, possibly due to conflict resolution.\
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"\n"
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"Otherwise, please use 'git reset'\n");
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static unsigned char head_sha1[20];
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static const char *use_message_buffer;
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static const char commit_editmsg[] = "COMMIT_EDITMSG";
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static struct lock_file index_lock; /* real index */
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@ -102,7 +100,7 @@ static enum {
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static char *cleanup_arg;
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static enum commit_whence whence;
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static int use_editor = 1, initial_commit, include_status = 1;
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static int use_editor = 1, include_status = 1;
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static int show_ignored_in_status;
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static const char *only_include_assumed;
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static struct strbuf message;
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@ -294,13 +292,13 @@ static void add_remove_files(struct string_list *list)
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}
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}
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static void create_base_index(void)
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static void create_base_index(const struct commit *current_head)
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{
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struct tree *tree;
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struct unpack_trees_options opts;
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struct tree_desc t;
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if (initial_commit) {
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if (!current_head) {
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discard_cache();
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return;
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}
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@ -313,7 +311,7 @@ static void create_base_index(void)
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opts.dst_index = &the_index;
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opts.fn = oneway_merge;
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tree = parse_tree_indirect(head_sha1);
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tree = parse_tree_indirect(current_head->object.sha1);
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if (!tree)
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die(_("failed to unpack HEAD tree object"));
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parse_tree(tree);
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@ -332,7 +330,8 @@ static void refresh_cache_or_die(int refresh_flags)
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die_resolve_conflict("commit");
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}
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static char *prepare_index(int argc, const char **argv, const char *prefix, int is_status)
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static char *prepare_index(int argc, const char **argv, const char *prefix,
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const struct commit *current_head, int is_status)
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{
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int fd;
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struct string_list partial;
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@ -448,7 +447,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
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memset(&partial, 0, sizeof(partial));
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partial.strdup_strings = 1;
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if (list_paths(&partial, initial_commit ? NULL : "HEAD", prefix, pathspec))
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if (list_paths(&partial, !current_head ? NULL : "HEAD", prefix, pathspec))
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exit(1);
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discard_cache();
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@ -467,7 +466,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
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(uintmax_t) getpid()),
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LOCK_DIE_ON_ERROR);
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create_base_index();
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create_base_index(current_head);
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add_remove_files(&partial);
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refresh_cache(REFRESH_QUIET);
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@ -516,12 +515,9 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix, int
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return s->commitable;
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}
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static int is_a_merge(const unsigned char *sha1)
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static int is_a_merge(const struct commit *current_head)
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{
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struct commit *commit = lookup_commit(sha1);
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if (!commit || parse_commit(commit))
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die(_("could not parse HEAD commit"));
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return !!(commit->parents && commit->parents->next);
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return !!(current_head->parents && current_head->parents->next);
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}
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static const char sign_off_header[] = "Signed-off-by: ";
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@ -625,6 +621,7 @@ static char *cut_ident_timestamp_part(char *string)
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}
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static int prepare_to_commit(const char *index_file, const char *prefix,
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struct commit *current_head,
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struct wt_status *s,
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struct strbuf *author_ident)
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{
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@ -846,7 +843,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
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* empty due to conflict resolution, which the user should okay.
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*/
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if (!commitable && whence != FROM_MERGE && !allow_empty &&
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!(amend && is_a_merge(head_sha1))) {
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!(amend && is_a_merge(current_head))) {
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run_status(stdout, index_file, prefix, 0, s);
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if (amend)
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fputs(_(empty_amend_advice), stderr);
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@ -1004,6 +1001,7 @@ static const char *read_commit_message(const char *name)
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static int parse_and_validate_options(int argc, const char *argv[],
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const char * const usage[],
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const char *prefix,
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struct commit *current_head,
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struct wt_status *s)
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{
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int f = 0;
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@ -1024,11 +1022,8 @@ static int parse_and_validate_options(int argc, const char *argv[],
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if (!use_editor)
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setenv("GIT_EDITOR", ":", 1);
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if (get_sha1("HEAD", head_sha1))
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initial_commit = 1;
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/* Sanity check options */
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if (amend && initial_commit)
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if (amend && !current_head)
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die(_("You have nothing to amend."));
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if (amend && whence != FROM_COMMIT)
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die(_("You are in the middle of a %s -- cannot amend."), whence_s());
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@ -1100,12 +1095,12 @@ static int parse_and_validate_options(int argc, const char *argv[],
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}
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static int dry_run_commit(int argc, const char **argv, const char *prefix,
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struct wt_status *s)
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const struct commit *current_head, struct wt_status *s)
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{
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int commitable;
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const char *index_file;
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index_file = prepare_index(argc, argv, prefix, 1);
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index_file = prepare_index(argc, argv, prefix, current_head, 1);
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commitable = run_status(stdout, index_file, prefix, 0, s);
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rollback_index_files();
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@ -1258,7 +1253,8 @@ int cmd_status(int argc, const char **argv, const char *prefix)
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return 0;
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}
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static void print_summary(const char *prefix, const unsigned char *sha1)
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static void print_summary(const char *prefix, const unsigned char *sha1,
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int initial_commit)
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{
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struct rev_info rev;
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struct commit *commit;
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@ -1380,12 +1376,13 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
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struct strbuf author_ident = STRBUF_INIT;
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const char *index_file, *reflog_msg;
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char *nl, *p;
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unsigned char commit_sha1[20];
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unsigned char sha1[20];
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struct ref_lock *ref_lock;
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struct commit_list *parents = NULL, **pptr = &parents;
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struct stat statbuf;
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int allow_fast_forward = 1;
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struct wt_status s;
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struct commit *current_head = NULL;
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if (argc == 2 && !strcmp(argv[1], "-h"))
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usage_with_options(builtin_commit_usage, builtin_commit_options);
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@ -1396,38 +1393,41 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
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if (s.use_color == -1)
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s.use_color = git_use_color_default;
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if (get_sha1("HEAD", sha1))
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current_head = NULL;
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else {
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current_head = lookup_commit(sha1);
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if (!current_head || parse_commit(current_head))
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die(_("could not parse HEAD commit"));
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}
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argc = parse_and_validate_options(argc, argv, builtin_commit_usage,
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prefix, &s);
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prefix, current_head, &s);
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if (dry_run) {
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if (diff_use_color_default == -1)
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diff_use_color_default = git_use_color_default;
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return dry_run_commit(argc, argv, prefix, &s);
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return dry_run_commit(argc, argv, prefix, current_head, &s);
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}
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index_file = prepare_index(argc, argv, prefix, 0);
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index_file = prepare_index(argc, argv, prefix, current_head, 0);
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/* Set up everything for writing the commit object. This includes
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running hooks, writing the trees, and interacting with the user. */
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if (!prepare_to_commit(index_file, prefix, &s, &author_ident)) {
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if (!prepare_to_commit(index_file, prefix,
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current_head, &s, &author_ident)) {
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rollback_index_files();
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return 1;
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}
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/* Determine parents */
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reflog_msg = getenv("GIT_REFLOG_ACTION");
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if (initial_commit) {
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if (!current_head) {
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if (!reflog_msg)
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reflog_msg = "commit (initial)";
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} else if (amend) {
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struct commit_list *c;
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struct commit *commit;
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if (!reflog_msg)
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reflog_msg = "commit (amend)";
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commit = lookup_commit(head_sha1);
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if (!commit || parse_commit(commit))
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die(_("could not parse HEAD commit"));
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for (c = commit->parents; c; c = c->next)
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for (c = current_head->parents; c; c = c->next)
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pptr = &commit_list_insert(c->item, pptr)->next;
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} else if (whence == FROM_MERGE) {
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struct strbuf m = STRBUF_INIT;
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@ -1435,7 +1435,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
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if (!reflog_msg)
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reflog_msg = "commit (merge)";
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pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
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pptr = &commit_list_insert(current_head, pptr)->next;
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fp = fopen(git_path("MERGE_HEAD"), "r");
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if (fp == NULL)
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die_errno(_("could not open '%s' for reading"),
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@ -1461,7 +1461,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
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reflog_msg = (whence == FROM_CHERRY_PICK)
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? "commit (cherry-pick)"
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: "commit";
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pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
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pptr = &commit_list_insert(current_head, pptr)->next;
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}
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/* Finally, get the commit message */
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@ -1487,7 +1487,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
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exit(1);
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}
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if (commit_tree(sb.buf, active_cache_tree->sha1, parents, commit_sha1,
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if (commit_tree(sb.buf, active_cache_tree->sha1, parents, sha1,
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author_ident.buf)) {
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rollback_index_files();
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die(_("failed to write commit object"));
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@ -1495,7 +1495,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
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strbuf_release(&author_ident);
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ref_lock = lock_any_ref_for_update("HEAD",
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initial_commit ? NULL : head_sha1,
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!current_head
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? NULL
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: current_head->object.sha1,
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0);
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nl = strchr(sb.buf, '\n');
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@ -1510,7 +1512,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
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rollback_index_files();
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die(_("cannot lock HEAD ref"));
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}
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if (write_ref_sha1(ref_lock, commit_sha1, sb.buf) < 0) {
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if (write_ref_sha1(ref_lock, sha1, sb.buf) < 0) {
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rollback_index_files();
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die(_("cannot update HEAD ref"));
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}
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@ -1532,13 +1534,14 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
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struct notes_rewrite_cfg *cfg;
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cfg = init_copy_notes_for_rewrite("amend");
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if (cfg) {
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copy_note_for_rewrite(cfg, head_sha1, commit_sha1);
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/* we are amending, so current_head is not NULL */
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copy_note_for_rewrite(cfg, current_head->object.sha1, sha1);
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finish_copy_notes_for_rewrite(cfg);
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}
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run_rewrite_hook(head_sha1, commit_sha1);
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run_rewrite_hook(current_head->object.sha1, sha1);
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}
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if (!quiet)
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print_summary(prefix, commit_sha1);
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print_summary(prefix, sha1, !current_head);
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return 0;
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}
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