#include "cache.h"
#include "cache-tree.h"
+#include "dir.h"
#include "builtin.h"
#include "diff.h"
#include "diffcore.h"
#include "strbuf.h"
#include "utf8.h"
#include "parse-options.h"
+#include "path-list.h"
static const char * const builtin_commit_usage[] = {
"git-commit [options] [--] <filepattern>...",
static unsigned char head_sha1[20], merge_head_sha1[20];
static char *use_message_buffer;
static const char commit_editmsg[] = "COMMIT_EDITMSG";
-static struct lock_file lock_file;
+static struct lock_file index_lock; /* real index */
+static struct lock_file false_lock; /* used only for partial commits */
+static enum {
+ COMMIT_AS_IS = 1,
+ COMMIT_NORMAL,
+ COMMIT_PARTIAL,
+} commit_style;
static char *logfile, *force_author, *template_file;
static char *edit_message, *use_message;
OPT_END()
};
+static void rollback_index_files(void)
+{
+ switch (commit_style) {
+ case COMMIT_AS_IS:
+ break; /* nothing to do */
+ case COMMIT_NORMAL:
+ rollback_lock_file(&index_lock);
+ break;
+ case COMMIT_PARTIAL:
+ rollback_lock_file(&index_lock);
+ rollback_lock_file(&false_lock);
+ break;
+ }
+}
+
+static void commit_index_files(void)
+{
+ switch (commit_style) {
+ case COMMIT_AS_IS:
+ break; /* nothing to do */
+ case COMMIT_NORMAL:
+ commit_lock_file(&index_lock);
+ break;
+ case COMMIT_PARTIAL:
+ commit_lock_file(&index_lock);
+ rollback_lock_file(&false_lock);
+ break;
+ }
+}
+
+/*
+ * Take a union of paths in the index and the named tree (typically, "HEAD"),
+ * and return the paths that match the given pattern in list.
+ */
+static int list_paths(struct path_list *list, const char *with_tree,
+ const char *prefix, const char **pattern)
+{
+ int i;
+ char *m;
+
+ for (i = 0; pattern[i]; i++)
+ ;
+ m = xcalloc(1, i);
+
+ if (with_tree)
+ overlay_tree_on_cache(with_tree, prefix);
+
+ for (i = 0; i < active_nr; i++) {
+ struct cache_entry *ce = active_cache[i];
+ if (ce->ce_flags & htons(CE_UPDATE))
+ continue;
+ if (!pathspec_match(pattern, m, ce->name, 0))
+ continue;
+ path_list_insert(ce->name, list);
+ }
+
+ return report_path_error(m, pattern, prefix ? strlen(prefix) : 0);
+}
+
+static void add_remove_files(struct path_list *list)
+{
+ int i;
+ for (i = 0; i < list->nr; i++) {
+ struct path_list_item *p = &(list->items[i]);
+ if (file_exists(p->path))
+ add_file_to_cache(p->path, 0);
+ else
+ remove_file_from_cache(p->path);
+ }
+}
+
static char *prepare_index(const char **files, const char *prefix)
{
int fd;
struct tree *tree;
- struct lock_file *next_index_lock;
+ struct path_list partial;
+ const char **pathspec = NULL;
if (interactive) {
interactive_add();
+ commit_style = COMMIT_AS_IS;
return get_index_file();
}
- fd = hold_locked_index(&lock_file, 1);
if (read_cache() < 0)
die("index file corrupt");
- if (all || also) {
- add_files_to_cache(verbose, also ? prefix : NULL, files);
+ if (*files)
+ pathspec = get_pathspec(prefix, files);
+
+ /*
+ * Non partial, non as-is commit.
+ *
+ * (1) get the real index;
+ * (2) update the_index as necessary;
+ * (3) write the_index out to the real index (still locked);
+ * (4) return the name of the locked index file.
+ *
+ * The caller should run hooks on the locked real index, and
+ * (A) if all goes well, commit the real index;
+ * (B) on failure, rollback the real index.
+ */
+ if (all || (also && pathspec && *pathspec)) {
+ int fd = hold_locked_index(&index_lock, 1);
+ add_files_to_cache(0, also ? prefix : NULL, pathspec);
refresh_cache(REFRESH_QUIET);
if (write_cache(fd, active_cache, active_nr) || close(fd))
die("unable to write new_index file");
- return lock_file.filename;
+ commit_style = COMMIT_NORMAL;
+ return index_lock.filename;
}
- if (*files == NULL) {
- /* Commit index as-is. */
- rollback_lock_file(&lock_file);
+ /*
+ * As-is commit.
+ *
+ * (1) return the name of the real index file.
+ *
+ * The caller should run hooks on the real index, and run
+ * hooks on the real index, and create commit from the_index.
+ * We still need to refresh the index here.
+ */
+ if (!pathspec || !*pathspec) {
+ fd = hold_locked_index(&index_lock, 1);
+ refresh_cache(REFRESH_QUIET);
+ if (write_cache(fd, active_cache, active_nr) ||
+ close(fd) || commit_locked_index(&index_lock))
+ die("unable to write new_index file");
+ commit_style = COMMIT_AS_IS;
return get_index_file();
}
- /* update the user index file */
- add_files_to_cache(verbose, prefix, files);
+ /*
+ * A partial commit.
+ *
+ * (0) find the set of affected paths;
+ * (1) get lock on the real index file;
+ * (2) update the_index with the given paths;
+ * (3) write the_index out to the real index (still locked);
+ * (4) get lock on the false index file;
+ * (5) reset the_index from HEAD;
+ * (6) update the_index the same way as (2);
+ * (7) write the_index out to the false index file;
+ * (8) return the name of the false index file (still locked);
+ *
+ * The caller should run hooks on the locked false index, and
+ * create commit from it. Then
+ * (A) if all goes well, commit the real index;
+ * (B) on failure, rollback the real index;
+ * In either case, rollback the false index.
+ */
+ commit_style = COMMIT_PARTIAL;
+
+ if (file_exists(git_path("MERGE_HEAD")))
+ die("cannot do a partial commit during a merge.");
+
+ memset(&partial, 0, sizeof(partial));
+ partial.strdup_paths = 1;
+ if (list_paths(&partial, initial_commit ? NULL : "HEAD", prefix, pathspec))
+ exit(1);
+
+ discard_cache();
+ if (read_cache() < 0)
+ die("cannot read the index");
+
+ fd = hold_locked_index(&index_lock, 1);
+ add_remove_files(&partial);
refresh_cache(REFRESH_QUIET);
if (write_cache(fd, active_cache, active_nr) || close(fd))
die("unable to write new_index file");
+ fd = hold_lock_file_for_update(&false_lock,
+ git_path("next-index-%d", getpid()), 1);
+ discard_cache();
if (!initial_commit) {
tree = parse_tree_indirect(head_sha1);
if (!tree)
if (read_tree(tree, 0, NULL))
die("failed to read HEAD tree object");
}
-
- /* Use a lock file to garbage collect the temporary index file. */
- next_index_lock = xmalloc(sizeof(*next_index_lock));
- fd = hold_lock_file_for_update(next_index_lock,
- git_path("next-index-%d", getpid()), 1);
- add_files_to_cache(verbose, prefix, files);
+ add_remove_files(&partial);
refresh_cache(REFRESH_QUIET);
- if (write_cache(fd, active_cache, active_nr) || close(fd))
- die("unable to write new_index file");
- return next_index_lock->filename;
+ if (write_cache(fd, active_cache, active_nr) || close(fd))
+ die("unable to write temporary index file");
+ return false_lock.filename;
}
static int run_status(FILE *fp, const char *index_file, const char *prefix)
commitable = run_status(stdout, index_file, prefix);
- rollback_lock_file(&lock_file);
+ rollback_index_files();
return commitable ? 0 : 1;
}
index_file = prepare_index(argv, prefix);
- if (!no_verify && run_hook(index_file, "pre-commit", NULL))
- exit(1);
+ if (!no_verify && run_hook(index_file, "pre-commit", NULL)) {
+ rollback_index_files();
+ return 1;
+ }
if (!prepare_log_message(index_file, prefix) && !in_merge) {
run_status(stdout, index_file, prefix);
+ rollback_index_files();
unlink(commit_editmsg);
return 1;
}
- strbuf_init(&sb, 0);
-
- /* Start building up the commit header */
+ /*
+ * Re-read the index as pre-commit hook could have updated it,
+ * and write it out as a tree.
+ */
+ discard_cache();
read_cache_from(index_file);
- active_cache_tree = cache_tree();
+ if (!active_cache_tree)
+ active_cache_tree = cache_tree();
if (cache_tree_update(active_cache_tree,
- active_cache, active_nr, 0, 0) < 0)
+ active_cache, active_nr, 0, 0) < 0) {
+ rollback_index_files();
die("Error building trees");
+ }
+
+ /*
+ * The commit object
+ */
+ strbuf_init(&sb, 0);
strbuf_addf(&sb, "tree %s\n",
sha1_to_hex(active_cache_tree->sha1));
header_len = sb.len;
if (!no_edit)
launch_editor(git_path(commit_editmsg), &sb);
- else if (strbuf_read_file(&sb, git_path(commit_editmsg), 0) < 0)
+ else if (strbuf_read_file(&sb, git_path(commit_editmsg), 0) < 0) {
+ rollback_index_files();
die("could not read commit message\n");
- if (run_hook(index_file, "commit-msg", git_path(commit_editmsg)))
+ }
+ if (run_hook(index_file, "commit-msg", git_path(commit_editmsg))) {
+ rollback_index_files();
exit(1);
+ }
stripspace(&sb, 1);
- if (sb.len < header_len ||
- message_is_empty(&sb, header_len))
+ if (sb.len < header_len || message_is_empty(&sb, header_len)) {
+ rollback_index_files();
die("* no commit message? aborting commit.");
+ }
strbuf_addch(&sb, '\0');
if (is_encoding_utf8(git_commit_encoding) && !is_utf8(sb.buf))
fprintf(stderr, commit_utf8_warn);
- if (write_sha1_file(sb.buf, sb.len - 1, commit_type, commit_sha1))
+ if (write_sha1_file(sb.buf, sb.len - 1, commit_type, commit_sha1)) {
+ rollback_index_files();
die("failed to write commit object");
+ }
ref_lock = lock_any_ref_for_update("HEAD",
initial_commit ? NULL : head_sha1,
strbuf_insert(&sb, 0, reflog_msg, strlen(reflog_msg));
strbuf_insert(&sb, strlen(reflog_msg), ": ", 2);
- if (!ref_lock)
+ if (!ref_lock) {
+ 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, commit_sha1, sb.buf) < 0) {
+ rollback_index_files();
die("cannot update HEAD ref");
+ }
unlink(git_path("MERGE_HEAD"));
unlink(git_path("MERGE_MSG"));
- if (lock_file.filename[0] && commit_locked_index(&lock_file))
- die("failed to write new index");
+ commit_index_files();
rerere();
-
- run_hook(index_file, "post-commit", NULL);
-
+ run_hook(get_index_file(), "post-commit", NULL);
if (!quiet)
print_summary(prefix, commit_sha1);
projects / git.git / commitdiff