diff options
author | Junio C Hamano <gitster@pobox.com> | 2010-05-08 22:34:47 -0700 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2010-05-08 22:34:47 -0700 |
commit | f78eeeaf55a4f60a05d3e6452f29a2214c29b6fd (patch) | |
tree | 24d7d6f25b0bdf61cc6bd50a81b1e5500bb89265 /builtin/revert.c | |
parent | f350e1faaa7070030a5c40acdaec650b47dfdc12 (diff) | |
parent | 91e525989665d69ace11b8f39618b1e8004fe19a (diff) | |
download | git-f78eeeaf55a4f60a05d3e6452f29a2214c29b6fd.tar.gz git-f78eeeaf55a4f60a05d3e6452f29a2214c29b6fd.tar.xz |
Merge branch 'cc/revert-strategy'
* cc/revert-strategy:
revert: add "--strategy" option to choose merge strategy
merge: make function try_merge_command non static
merge: refactor code that calls "git merge-STRATEGY"
revert: refactor merge recursive code into its own function
revert: use strbuf to refactor the code that writes the merge message
Conflicts:
builtin/revert.c
Diffstat (limited to 'builtin/revert.c')
-rw-r--r-- | builtin/revert.c | 179 |
1 files changed, 105 insertions, 74 deletions
diff --git a/builtin/revert.c b/builtin/revert.c index 7d68ef714..7976b5a32 100644 --- a/builtin/revert.c +++ b/builtin/revert.c @@ -43,6 +43,7 @@ static const char *commit_name; static int allow_rerere_auto; static const char *me; +static const char *strategy; #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION" @@ -62,6 +63,7 @@ static void parse_args(int argc, const char **argv) OPT_BOOLEAN('s', "signoff", &signoff, "add Signed-off-by:"), OPT_INTEGER('m', "mainline", &mainline, "parent number"), OPT_RERERE_AUTOUPDATE(&allow_rerere_auto), + OPT_STRING(0, "strategy", &strategy, "strategy", "merge strategy"), OPT_END(), OPT_END(), OPT_END(), @@ -174,28 +176,17 @@ static char *get_encoding(const char *message) return NULL; } -static struct lock_file msg_file; -static int msg_fd; - -static void add_to_msg(const char *string) -{ - int len = strlen(string); - if (write_in_full(msg_fd, string, len) < 0) - die_errno ("Could not write to MERGE_MSG"); -} - -static void add_message_to_msg(const char *message) +static void add_message_to_msg(struct strbuf *msgbuf, const char *message) { const char *p = message; while (*p && (*p != '\n' || p[1] != '\n')) p++; if (!*p) - add_to_msg(sha1_to_hex(commit->object.sha1)); + strbuf_addstr(msgbuf, sha1_to_hex(commit->object.sha1)); p += 2; - add_to_msg(p); - return; + strbuf_addstr(msgbuf, p); } static void set_author_ident_env(const char *message) @@ -271,6 +262,19 @@ static char *help_msg(const char *name) return strbuf_detach(&helpbuf, NULL); } +static void write_message(struct strbuf *msgbuf, const char *filename) +{ + static struct lock_file msg_file; + + int msg_fd = hold_lock_file_for_update(&msg_file, filename, + LOCK_DIE_ON_ERROR); + if (write_in_full(msg_fd, msgbuf->buf, msgbuf->len) < 0) + die_errno("Could not write to %s.", filename); + strbuf_release(msgbuf); + if (commit_lock_file(&msg_file) < 0) + die("Error wrapping up %s", filename); +} + static struct tree *empty_tree(void) { struct tree *tree = xcalloc(1, sizeof(struct tree)); @@ -305,17 +309,70 @@ static int fast_forward_to(const unsigned char *to, const unsigned char *from) return write_ref_sha1(ref_lock, to, "cherry-pick"); } +static void do_recursive_merge(struct commit *base, struct commit *next, + const char *base_label, const char *next_label, + unsigned char *head, struct strbuf *msgbuf, + char *defmsg) +{ + struct merge_options o; + struct tree *result, *next_tree, *base_tree, *head_tree; + int clean, index_fd; + static struct lock_file index_lock; + + index_fd = hold_locked_index(&index_lock, 1); + + read_cache(); + init_merge_options(&o); + o.ancestor = base ? base_label : "(empty tree)"; + o.branch1 = "HEAD"; + o.branch2 = next ? next_label : "(empty tree)"; + + head_tree = parse_tree_indirect(head); + next_tree = next ? next->tree : empty_tree(); + base_tree = base ? base->tree : empty_tree(); + + clean = merge_trees(&o, + head_tree, + next_tree, base_tree, &result); + + if (active_cache_changed && + (write_cache(index_fd, active_cache, active_nr) || + commit_locked_index(&index_lock))) + die("%s: Unable to write new index file", me); + rollback_lock_file(&index_lock); + + if (!clean) { + int i; + strbuf_addstr(msgbuf, "\nConflicts:\n\n"); + for (i = 0; i < active_nr;) { + struct cache_entry *ce = active_cache[i++]; + if (ce_stage(ce)) { + strbuf_addch(msgbuf, '\t'); + strbuf_addstr(msgbuf, ce->name); + strbuf_addch(msgbuf, '\n'); + while (i < active_nr && !strcmp(ce->name, + active_cache[i]->name)) + i++; + } + } + write_message(msgbuf, defmsg); + fprintf(stderr, "Automatic %s failed.%s\n", + me, help_msg(commit_name)); + rerere(allow_rerere_auto); + exit(1); + } + write_message(msgbuf, defmsg); + fprintf(stderr, "Finished one %s.\n", me); +} + static int revert_or_cherry_pick(int argc, const char **argv) { unsigned char head[20]; struct commit *base, *next, *parent; const char *base_label, *next_label; - int i, index_fd, clean; struct commit_message msg = { NULL, NULL, NULL, NULL, NULL }; char *defmsg = NULL; - struct merge_options o; - struct tree *result, *next_tree, *base_tree, *head_tree; - static struct lock_file index_lock; + struct strbuf msgbuf = STRBUF_INIT; git_config(git_default_config, NULL); me = action == REVERT ? "revert" : "cherry-pick"; @@ -403,83 +460,57 @@ static int revert_or_cherry_pick(int argc, const char **argv) */ defmsg = git_pathdup("MERGE_MSG"); - msg_fd = hold_lock_file_for_update(&msg_file, defmsg, - LOCK_DIE_ON_ERROR); - - index_fd = hold_locked_index(&index_lock, 1); if (action == REVERT) { base = commit; base_label = msg.label; next = parent; next_label = msg.parent_label; - add_to_msg("Revert \""); - add_to_msg(msg.subject); - add_to_msg("\"\n\nThis reverts commit "); - add_to_msg(sha1_to_hex(commit->object.sha1)); + strbuf_addstr(&msgbuf, "Revert \""); + strbuf_addstr(&msgbuf, msg.subject); + strbuf_addstr(&msgbuf, "\"\n\nThis reverts commit "); + strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1)); if (commit->parents->next) { - add_to_msg(", reversing\nchanges made to "); - add_to_msg(sha1_to_hex(parent->object.sha1)); + strbuf_addstr(&msgbuf, ", reversing\nchanges made to "); + strbuf_addstr(&msgbuf, sha1_to_hex(parent->object.sha1)); } - add_to_msg(".\n"); + strbuf_addstr(&msgbuf, ".\n"); } else { base = parent; base_label = msg.parent_label; next = commit; next_label = msg.label; set_author_ident_env(msg.message); - add_message_to_msg(msg.message); + add_message_to_msg(&msgbuf, msg.message); if (no_replay) { - add_to_msg("(cherry picked from commit "); - add_to_msg(sha1_to_hex(commit->object.sha1)); - add_to_msg(")\n"); + strbuf_addstr(&msgbuf, "(cherry picked from commit "); + strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1)); + strbuf_addstr(&msgbuf, ")\n"); } } - read_cache(); - init_merge_options(&o); - o.ancestor = base ? base_label : "(empty tree)"; - o.branch1 = "HEAD"; - o.branch2 = next ? next_label : "(empty tree)"; - - head_tree = parse_tree_indirect(head); - next_tree = next ? next->tree : empty_tree(); - base_tree = base ? base->tree : empty_tree(); - - clean = merge_trees(&o, - head_tree, - next_tree, base_tree, &result); - - if (active_cache_changed && - (write_cache(index_fd, active_cache, active_nr) || - commit_locked_index(&index_lock))) - die("%s: Unable to write new index file", me); - rollback_lock_file(&index_lock); - - if (!clean) { - add_to_msg("\nConflicts:\n\n"); - for (i = 0; i < active_nr;) { - struct cache_entry *ce = active_cache[i++]; - if (ce_stage(ce)) { - add_to_msg("\t"); - add_to_msg(ce->name); - add_to_msg("\n"); - while (i < active_nr && !strcmp(ce->name, - active_cache[i]->name)) - i++; - } + if (!strategy || !strcmp(strategy, "recursive") || action == REVERT) + do_recursive_merge(base, next, base_label, next_label, + head, &msgbuf, defmsg); + else { + int res; + struct commit_list *common = NULL; + struct commit_list *remotes = NULL; + write_message(&msgbuf, defmsg); + commit_list_insert(base, &common); + commit_list_insert(next, &remotes); + res = try_merge_command(strategy, common, + sha1_to_hex(head), remotes); + free_commit_list(common); + free_commit_list(remotes); + if (res) { + fprintf(stderr, "Automatic %s with strategy %s failed.%s\n", + me, strategy, help_msg(commit_name)); + rerere(allow_rerere_auto); + exit(1); } - if (commit_lock_file(&msg_file) < 0) - die ("Error wrapping up %s", defmsg); - fprintf(stderr, "Automatic %s failed.%s\n", - me, help_msg(commit_name)); - rerere(allow_rerere_auto); - exit(1); } - if (commit_lock_file(&msg_file) < 0) - die ("Error wrapping up %s", defmsg); - fprintf(stderr, "Finished one %s.\n", me); /* * |