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diff --git a/builtin-revert.c b/builtin-revert.c
index a9347cf9c57b2e4d15d37da609a2851e5b1cfc8e..607a2f0337c3d3f1fb8bdac7443e3a7f56e92305 100644 (file)
--- a/builtin-revert.c
+++ b/builtin-revert.c
#include "exec_cmd.h"
#include "utf8.h"
#include "parse-options.h"
+#include "cache-tree.h"
+#include "diff.h"
+#include "revision.h"
/*
* This implements the builtins revert and cherry-pick.
NULL
};
-static int edit, no_replay, no_commit, needed_deref;
+static int edit, no_replay, no_commit, mainline;
static enum { REVERT, CHERRY_PICK } action;
static struct commit *commit;
OPT_BOOLEAN('e', "edit", &edit, "edit the commit message"),
OPT_BOOLEAN('x', NULL, &no_replay, "append commit name when cherry-picking"),
OPT_BOOLEAN('r', NULL, &noop, "no-op (backward compatibility)"),
+ OPT_INTEGER('m', "mainline", &mainline, "parent number"),
OPT_END(),
};
if (parse_options(argc, argv, options, usage_str, 0) != 1)
usage_with_options(usage_str, options);
arg = argv[0];
+
if (get_sha1(arg, sha1))
die ("Cannot find '%s'", arg);
commit = (struct commit *)parse_object(sha1);
if (commit->object.type == OBJ_TAG) {
commit = (struct commit *)
deref_tag((struct object *)commit, arg, strlen(arg));
- needed_deref = 1;
}
if (commit->object.type != OBJ_COMMIT)
die ("'%s' does not point to a commit", arg);
return run_command_v_opt(argv, RUN_COMMAND_NO_STDIN | RUN_GIT_CMD);
}
+static char *help_msg(const unsigned char *sha1)
+{
+ static char helpbuf[1024];
+ char *msg = getenv("GIT_CHERRY_PICK_HELP");
+
+ if (msg)
+ return msg;
+
+ strcpy(helpbuf, " After resolving the conflicts,\n"
+ "mark the corrected paths with 'git add <paths>' "
+ "or 'git rm <paths>' and commit the result.");
+
+ if (action == CHERRY_PICK) {
+ sprintf(helpbuf + strlen(helpbuf),
+ "\nWhen commiting, use the option "
+ "'-c %s' to retain authorship and message.",
+ find_unique_abbrev(sha1, DEFAULT_ABBREV));
+ }
+ return helpbuf;
+}
+
+static int index_is_dirty(void)
+{
+ struct rev_info rev;
+ init_revisions(&rev, NULL);
+ setup_revisions(0, NULL, &rev, "HEAD");
+ DIFF_OPT_SET(&rev.diffopt, QUIET);
+ DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS);
+ run_diff_index(&rev, 1);
+ return !!DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES);
+}
+
static int revert_or_cherry_pick(int argc, const char **argv)
{
unsigned char head[20];
- struct commit *base, *next;
+ struct commit *base, *next, *parent;
int i;
char *oneline, *reencoded_message = NULL;
const char *message, *encoding;
if (no_commit) {
/*
* We do not intend to commit immediately. We just want to
- * merge the differences in.
+ * merge the differences in, so let's compute the tree
+ * that represents the "current" state for merge-recursive
+ * to work on.
*/
- if (write_tree(head, 0, NULL))
+ if (write_cache_as_tree(head, 0, NULL))
die ("Your index file is unmerged.");
} else {
- struct wt_status s;
-
if (get_sha1("HEAD", head))
die ("You do not have a valid HEAD");
- wt_status_prepare(&s);
- if (s.commitable || s.workdir_dirty)
+ if (read_cache() < 0)
+ die("could not read the index");
+ if (index_is_dirty())
die ("Dirty index: cannot %s", me);
discard_cache();
}
if (!commit->parents)
die ("Cannot %s a root commit", me);
- if (commit->parents->next)
- die ("Cannot %s a multi-parent commit.", me);
+ if (commit->parents->next) {
+ /* Reverting or cherry-picking a merge commit */
+ int cnt;
+ struct commit_list *p;
+
+ if (!mainline)
+ die("Commit %s is a merge but no -m option was given.",
+ sha1_to_hex(commit->object.sha1));
+
+ for (cnt = 1, p = commit->parents;
+ cnt != mainline && p;
+ cnt++)
+ p = p->next;
+ if (cnt != mainline || !p)
+ die("Commit %s does not have parent %d",
+ sha1_to_hex(commit->object.sha1), mainline);
+ parent = p->item;
+ } else if (0 < mainline)
+ die("Mainline was specified but commit %s is not a merge.",
+ sha1_to_hex(commit->object.sha1));
+ else
+ parent = commit->parents->item;
+
if (!(message = commit->buffer))
die ("Cannot get commit message for %s",
sha1_to_hex(commit->object.sha1));
char *oneline_body = strchr(oneline, ' ');
base = commit;
- next = commit->parents->item;
+ next = parent;
add_to_msg("Revert \"");
add_to_msg(oneline_body + 1);
add_to_msg("\"\n\nThis reverts commit ");
add_to_msg(sha1_to_hex(commit->object.sha1));
add_to_msg(".\n");
} else {
- base = commit->parents->item;
+ base = parent;
next = commit;
set_author_ident_env(message);
add_message_to_msg(message);
add_to_msg(")\n");
}
}
- if (needed_deref) {
- add_to_msg("(original 'git ");
- add_to_msg(me);
- add_to_msg("' arguments: ");
- for (i = 0; i < argc; i++) {
- if (i)
- add_to_msg(" ");
- add_to_msg(argv[i]);
- }
- add_to_msg(")\n");
- }
if (merge_recursive(sha1_to_hex(base->object.sha1),
sha1_to_hex(head), "HEAD",
sha1_to_hex(next->object.sha1), oneline) ||
- write_tree(head, 0, NULL)) {
+ write_cache_as_tree(head, 0, NULL)) {
add_to_msg("\nConflicts:\n\n");
read_cache();
for (i = 0; i < active_nr;) {
i++;
}
}
- if (close(msg_fd) || commit_lock_file(&msg_file) < 0)
+ if (commit_lock_file(&msg_file) < 0)
die ("Error wrapping up %s", defmsg);
- fprintf(stderr, "Automatic %s failed. "
- "After resolving the conflicts,\n"
- "mark the corrected paths with 'git add <paths>' "
- "and commit the result.\n", me);
- if (action == CHERRY_PICK) {
- fprintf(stderr, "When commiting, use the option "
- "'-c %s' to retain authorship and message.\n",
- find_unique_abbrev(commit->object.sha1,
- DEFAULT_ABBREV));
- }
+ fprintf(stderr, "Automatic %s failed.%s\n",
+ me, help_msg(commit->object.sha1));
exit(1);
}
- if (close(msg_fd) || commit_lock_file(&msg_file) < 0)
+ if (commit_lock_file(&msg_file) < 0)
die ("Error wrapping up %s", defmsg);
fprintf(stderr, "Finished one %s.\n", me);
else
return execl_git_cmd("commit", "-n", "-F", defmsg, NULL);
}
- if (reencoded_message)
- free(reencoded_message);
+ free(reencoded_message);
return 0;
}