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Diffstat (limited to 'builtin-merge.c')
-rw-r--r--builtin-merge.c196
1 files changed, 140 insertions, 56 deletions
diff --git a/builtin-merge.c b/builtin-merge.c
index d0bf1fc1ed..5e7910bd8d 100644
--- a/builtin-merge.c
+++ b/builtin-merge.c
@@ -22,6 +22,8 @@
#include "log-tree.h"
#include "color.h"
#include "rerere.h"
+#include "help.h"
+#include "merge-recursive.h"
#define DEFAULT_TWOHEAD (1<<0)
#define DEFAULT_OCTOPUS (1<<1)
@@ -77,7 +79,9 @@ static int option_parse_message(const struct option *opt,
static struct strategy *get_strategy(const char *name)
{
int i;
- struct strbuf err;
+ struct strategy *ret;
+ static struct cmdnames main_cmds, other_cmds;
+ static int loaded;
if (!name)
return NULL;
@@ -86,12 +90,42 @@ static struct strategy *get_strategy(const char *name)
if (!strcmp(name, all_strategy[i].name))
return &all_strategy[i];
- strbuf_init(&err, 0);
- for (i = 0; i < ARRAY_SIZE(all_strategy); i++)
- strbuf_addf(&err, " %s", all_strategy[i].name);
- fprintf(stderr, "Could not find merge strategy '%s'.\n", name);
- fprintf(stderr, "Available strategies are:%s.\n", err.buf);
- exit(1);
+ if (!loaded) {
+ struct cmdnames not_strategies;
+ loaded = 1;
+
+ memset(&not_strategies, 0, sizeof(struct cmdnames));
+ load_command_list("git-merge-", &main_cmds, &other_cmds);
+ for (i = 0; i < main_cmds.cnt; i++) {
+ int j, found = 0;
+ struct cmdname *ent = main_cmds.names[i];
+ for (j = 0; j < ARRAY_SIZE(all_strategy); j++)
+ if (!strncmp(ent->name, all_strategy[j].name, ent->len)
+ && !all_strategy[j].name[ent->len])
+ found = 1;
+ if (!found)
+ add_cmdname(&not_strategies, ent->name, ent->len);
+ exclude_cmds(&main_cmds, &not_strategies);
+ }
+ }
+ if (!is_in_cmdlist(&main_cmds, name) && !is_in_cmdlist(&other_cmds, name)) {
+ fprintf(stderr, "Could not find merge strategy '%s'.\n", name);
+ fprintf(stderr, "Available strategies are:");
+ for (i = 0; i < main_cmds.cnt; i++)
+ fprintf(stderr, " %s", main_cmds.names[i]->name);
+ fprintf(stderr, ".\n");
+ if (other_cmds.cnt) {
+ fprintf(stderr, "Available custom strategies are:");
+ for (i = 0; i < other_cmds.cnt; i++)
+ fprintf(stderr, " %s", other_cmds.names[i]->name);
+ fprintf(stderr, ".\n");
+ }
+ exit(1);
+ }
+
+ ret = xcalloc(1, sizeof(struct strategy));
+ ret->name = xstrdup(name);
+ return ret;
}
static void append_strategy(struct strategy *s)
@@ -145,6 +179,7 @@ static void drop_save(void)
{
unlink(git_path("MERGE_HEAD"));
unlink(git_path("MERGE_MSG"));
+ unlink(git_path("MERGE_MODE"));
}
static void save_state(void)
@@ -192,7 +227,7 @@ static void reset_hard(unsigned const char *sha1, int verbose)
static void restore_state(void)
{
- struct strbuf sb;
+ struct strbuf sb = STRBUF_INIT;
const char *args[] = { "stash", "apply", NULL, NULL };
if (is_null_sha1(stash))
@@ -200,7 +235,6 @@ static void restore_state(void)
reset_hard(head, 1);
- strbuf_init(&sb, 0);
args[2] = sha1_to_hex(stash);
/*
@@ -224,7 +258,7 @@ static void squash_message(void)
{
struct rev_info rev;
struct commit *commit;
- struct strbuf out;
+ struct strbuf out = STRBUF_INIT;
struct commit_list *j;
int fd;
@@ -248,7 +282,6 @@ static void squash_message(void)
if (prepare_revision_walk(&rev))
die("revision walk setup failed");
- strbuf_init(&out, 0);
strbuf_addstr(&out, "Squashed commit of the following:\n");
while ((commit = get_revision(&rev)) != NULL) {
strbuf_addch(&out, '\n');
@@ -293,9 +326,8 @@ static int run_hook(const char *name)
static void finish(const unsigned char *new_head, const char *msg)
{
- struct strbuf reflog_message;
+ struct strbuf reflog_message = STRBUF_INIT;
- strbuf_init(&reflog_message, 0);
if (!msg)
strbuf_addstr(&reflog_message, getenv("GIT_REFLOG_ACTION"));
else {
@@ -346,7 +378,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
{
struct object *remote_head;
unsigned char branch_head[20], buf_sha[20];
- struct strbuf buf;
+ struct strbuf buf = STRBUF_INIT;
const char *ptr;
int len, early;
@@ -355,7 +387,6 @@ static void merge_name(const char *remote, struct strbuf *msg)
if (!remote_head)
die("'%s' does not point to a commit", remote);
- strbuf_init(&buf, 0);
strbuf_addstr(&buf, "refs/heads/");
strbuf_addstr(&buf, remote);
resolve_ref(buf.buf, branch_head, 0, 0);
@@ -410,10 +441,9 @@ static void merge_name(const char *remote, struct strbuf *msg)
if (!strcmp(remote, "FETCH_HEAD") &&
!access(git_path("FETCH_HEAD"), R_OK)) {
FILE *fp;
- struct strbuf line;
+ struct strbuf line = STRBUF_INIT;
char *ptr;
- strbuf_init(&line, 0);
fp = fopen(git_path("FETCH_HEAD"), "r");
if (!fp)
die("could not open %s for reading: %s",
@@ -511,30 +541,76 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
const char **args;
int i = 0, ret;
struct commit_list *j;
- struct strbuf buf;
-
- args = xmalloc((4 + commit_list_count(common) +
- commit_list_count(remoteheads)) * sizeof(char *));
- strbuf_init(&buf, 0);
- strbuf_addf(&buf, "merge-%s", strategy);
- args[i++] = buf.buf;
- for (j = common; j; j = j->next)
- args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
- args[i++] = "--";
- args[i++] = head_arg;
- for (j = remoteheads; j; j = j->next)
- args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
- args[i] = NULL;
- ret = run_command_v_opt(args, RUN_GIT_CMD);
- strbuf_release(&buf);
- i = 1;
- for (j = common; j; j = j->next)
- free((void *)args[i++]);
- i += 2;
- for (j = remoteheads; j; j = j->next)
- free((void *)args[i++]);
- free(args);
- return -ret;
+ struct strbuf buf = STRBUF_INIT;
+ int index_fd;
+ struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
+
+ index_fd = hold_locked_index(lock, 1);
+ refresh_cache(REFRESH_QUIET);
+ if (active_cache_changed &&
+ (write_cache(index_fd, active_cache, active_nr) ||
+ commit_locked_index(lock)))
+ return error("Unable to write index.");
+ rollback_lock_file(lock);
+
+ if (!strcmp(strategy, "recursive") || !strcmp(strategy, "subtree")) {
+ int clean;
+ struct commit *result;
+ struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
+ int index_fd;
+ struct commit_list *reversed = NULL;
+ struct merge_options o;
+
+ if (remoteheads->next) {
+ error("Not handling anything other than two heads merge.");
+ return 2;
+ }
+
+ init_merge_options(&o);
+ if (!strcmp(strategy, "subtree"))
+ o.subtree_merge = 1;
+
+ o.branch1 = head_arg;
+ o.branch2 = remoteheads->item->util;
+
+ for (j = common; j; j = j->next)
+ commit_list_insert(j->item, &reversed);
+
+ index_fd = hold_locked_index(lock, 1);
+ clean = merge_recursive(&o, lookup_commit(head),
+ remoteheads->item, reversed, &result);
+ if (active_cache_changed &&
+ (write_cache(index_fd, active_cache, active_nr) ||
+ commit_locked_index(lock)))
+ die ("unable to write %s", get_index_file());
+ rollback_lock_file(lock);
+ return clean ? 0 : 1;
+ } else {
+ args = xmalloc((4 + commit_list_count(common) +
+ commit_list_count(remoteheads)) * sizeof(char *));
+ strbuf_addf(&buf, "merge-%s", strategy);
+ args[i++] = buf.buf;
+ for (j = common; j; j = j->next)
+ args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
+ args[i++] = "--";
+ args[i++] = head_arg;
+ for (j = remoteheads; j; j = j->next)
+ args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
+ args[i] = NULL;
+ ret = run_command_v_opt(args, RUN_GIT_CMD);
+ strbuf_release(&buf);
+ i = 1;
+ for (j = common; j; j = j->next)
+ free((void *)args[i++]);
+ i += 2;
+ for (j = remoteheads; j; j = j->next)
+ free((void *)args[i++]);
+ free(args);
+ discard_cache();
+ if (read_cache() < 0)
+ die("failed to read the cache");
+ return -ret;
+ }
}
static void count_diff_files(struct diff_queue_struct *q,
@@ -659,7 +735,7 @@ static int merge_trivial(void)
parent->next = xmalloc(sizeof(*parent->next));
parent->next->item = remoteheads->item;
parent->next->next = NULL;
- commit_tree(merge_msg.buf, result_tree, parent, result_commit);
+ commit_tree(merge_msg.buf, result_tree, parent, result_commit, NULL);
finish(result_commit, "In-index merge");
drop_save();
return 0;
@@ -688,7 +764,7 @@ static int finish_automerge(struct commit_list *common,
}
free_commit_list(remoteheads);
strbuf_addch(&merge_msg, '\n');
- commit_tree(merge_msg.buf, result_tree, parents, result_commit);
+ commit_tree(merge_msg.buf, result_tree, parents, result_commit, NULL);
strbuf_addf(&buf, "Merge made by %s.", wt_strategy);
finish(result_commit, buf.buf);
strbuf_release(&buf);
@@ -745,10 +821,6 @@ static int evaluate_result(void)
int cnt = 0;
struct rev_info rev;
- discard_cache();
- if (read_cache() < 0)
- die("failed to read the cache");
-
/* Check how many files differ. */
init_revisions(&rev, "");
setup_revisions(0, NULL, &rev, NULL);
@@ -770,7 +842,7 @@ static int evaluate_result(void)
int cmd_merge(int argc, const char **argv, const char *prefix)
{
unsigned char result_tree[20];
- struct strbuf buf;
+ struct strbuf buf = STRBUF_INIT;
const char *head_arg;
int flag, head_invalid = 0, i;
int best_cnt = -1, merge_was_ok = 0, automerge_was_ok = 0;
@@ -819,7 +891,6 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* Traditional format never would have "-m" so it is an
* additional safety measure to check for it.
*/
- strbuf_init(&buf, 0);
if (!have_message && is_old_style_invocation(argc, argv)) {
strbuf_addstr(&merge_msg, argv[0]);
@@ -836,6 +907,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
if (argc != 1)
die("Can merge only exactly one commit into "
"empty head");
+ if (squash)
+ die("Squash commit into empty head not supported yet");
+ if (!allow_fast_forward)
+ die("Non-fast-forward commit does not make sense into "
+ "an empty head");
remote_head = peel_to_type(argv[0], 0, NULL, OBJ_COMMIT);
if (!remote_head)
die("%s - not something we can merge", argv[0]);
@@ -844,7 +920,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
reset_hard(remote_head->sha1, 0);
return 0;
} else {
- struct strbuf msg;
+ struct strbuf msg = STRBUF_INIT;
/* We are invoked directly as the first-class UI. */
head_arg = "HEAD";
@@ -857,7 +933,6 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* codepath so we discard the error in this
* loop.
*/
- strbuf_init(&msg, 0);
for (i = 0; i < argc; i++)
merge_name(argv[i], &msg);
fmt_merge_msg(option_log, &msg, &merge_msg);
@@ -877,12 +952,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
for (i = 0; i < argc; i++) {
struct object *o;
+ struct commit *commit;
o = peel_to_type(argv[i], 0, NULL, OBJ_COMMIT);
if (!o)
die("%s - not something we can merge", argv[i]);
- remotes = &commit_list_insert(lookup_commit(o->sha1),
- remotes)->next;
+ commit = lookup_commit(o->sha1);
+ commit->util = (void *)argv[i];
+ remotes = &commit_list_insert(commit, remotes)->next;
strbuf_addf(&buf, "GITHEAD_%s", sha1_to_hex(o->sha1));
setenv(buf.buf, argv[i], 1);
@@ -930,7 +1007,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
!common->next &&
!hashcmp(common->item->object.sha1, head)) {
/* Again the most common case of merging one remote. */
- struct strbuf msg;
+ struct strbuf msg = STRBUF_INIT;
struct object *o;
char hex[41];
@@ -940,7 +1017,6 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
hex,
find_unique_abbrev(remoteheads->item->object.sha1,
DEFAULT_ABBREV));
- strbuf_init(&msg, 0);
strbuf_addstr(&msg, "Fast forward");
if (have_message)
strbuf_addstr(&msg,
@@ -1076,7 +1152,6 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
}
/* Automerge succeeded. */
- discard_cache();
write_tree_trivial(result_tree);
automerge_was_ok = 1;
break;
@@ -1136,6 +1211,15 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
merge_msg.len)
die("Could not write to %s", git_path("MERGE_MSG"));
close(fd);
+ fd = open(git_path("MERGE_MODE"), O_WRONLY | O_CREAT | O_TRUNC, 0666);
+ if (fd < 0)
+ die("Could open %s for writing", git_path("MERGE_MODE"));
+ strbuf_reset(&buf);
+ if (!allow_fast_forward)
+ strbuf_addf(&buf, "no-ff");
+ if (write_in_full(fd, buf.buf, buf.len) != buf.len)
+ die("Could not write to %s", git_path("MERGE_MODE"));
+ close(fd);
}
if (merge_was_ok) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 01:19:20 +0000