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Diffstat (limited to 'builtin/merge.c')
-rw-r--r--builtin/merge.c603
1 files changed, 320 insertions, 283 deletions
diff --git a/builtin/merge.c b/builtin/merge.c
index f0cf1205fa..a96d4fb501 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -9,6 +9,7 @@
#include "cache.h"
#include "parse-options.h"
#include "builtin.h"
+#include "lockfile.h"
#include "run-command.h"
#include "diff.h"
#include "refs.h"
@@ -28,6 +29,8 @@
#include "remote.h"
#include "fmt-merge-msg.h"
#include "gpg-interface.h"
+#include "sequencer.h"
+#include "string-list.h"
#define DEFAULT_TWOHEAD (1<<0)
#define DEFAULT_OCTOPUS (1<<1)
@@ -40,9 +43,10 @@ struct strategy {
};
static const char * const builtin_merge_usage[] = {
- N_("git merge [options] [<commit>...]"),
- N_("git merge [options] <msg> HEAD <commit>"),
+ N_("git merge [<options>] [<commit>...]"),
+ N_("git merge [<options>] <msg> HEAD <commit>"),
N_("git merge --abort"),
+ N_("git merge --continue"),
NULL
};
@@ -62,8 +66,10 @@ static int option_renormalize;
static int verbosity;
static int allow_rerere_auto;
static int abort_current_merge;
+static int continue_current_merge;
+static int allow_unrelated_histories;
static int show_progress = -1;
-static int default_to_upstream;
+static int default_to_upstream = 1;
static const char *sign_commit;
static struct strategy all_strategy[] = {
@@ -208,7 +214,7 @@ static struct option builtin_merge_options[] = {
PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, FF_ONLY },
OPT_RERERE_AUTOUPDATE(&allow_rerere_auto),
OPT_BOOL(0, "verify-signatures", &verify_signatures,
- N_("Verify that the named commit has a valid GPG signature")),
+ N_("verify that the named commit has a valid GPG signature")),
OPT_CALLBACK('s', "strategy", &use_strategies, N_("strategy"),
N_("merge strategy to use"), option_parse_strategy),
OPT_CALLBACK('X', "strategy-option", &xopts, N_("option=value"),
@@ -219,8 +225,12 @@ static struct option builtin_merge_options[] = {
OPT__VERBOSITY(&verbosity),
OPT_BOOL(0, "abort", &abort_current_merge,
N_("abort the current in-progress merge")),
+ OPT_BOOL(0, "continue", &continue_current_merge,
+ N_("continue the current in-progress merge")),
+ OPT_BOOL(0, "allow-unrelated-histories", &allow_unrelated_histories,
+ N_("allow merging unrelated histories")),
OPT_SET_INT(0, "progress", &show_progress, N_("force progress reporting"), 1),
- { OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key id"),
+ { OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key-id"),
N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
OPT_BOOL(0, "overwrite-ignore", &overwrite_ignore, N_("update ignored files (default)")),
OPT_END()
@@ -229,19 +239,18 @@ static struct option builtin_merge_options[] = {
/* Cleans up metadata that is uninteresting after a succeeded merge. */
static void drop_save(void)
{
- unlink(git_path("MERGE_HEAD"));
- unlink(git_path("MERGE_MSG"));
- unlink(git_path("MERGE_MODE"));
+ unlink(git_path_merge_head());
+ unlink(git_path_merge_msg());
+ unlink(git_path_merge_mode());
}
static int save_state(unsigned char *stash)
{
int len;
- struct child_process cp;
+ struct child_process cp = CHILD_PROCESS_INIT;
struct strbuf buffer = STRBUF_INIT;
const char *argv[] = {"stash", "create", NULL};
- memset(&cp, 0, sizeof(cp));
cp.argv = argv;
cp.out = -1;
cp.git_cmd = 1;
@@ -332,15 +341,9 @@ static void squash_message(struct commit *commit, struct commit_list *remotehead
struct rev_info rev;
struct strbuf out = STRBUF_INIT;
struct commit_list *j;
- const char *filename;
- int fd;
struct pretty_print_context ctx = {0};
printf(_("Squash commit -- not updating HEAD\n"));
- filename = git_path("SQUASH_MSG");
- fd = open(filename, O_WRONLY | O_CREAT, 0666);
- if (fd < 0)
- die_errno(_("Could not write to '%s'"), filename);
init_revisions(&rev, NULL);
rev.ignore_merges = 1;
@@ -364,13 +367,10 @@ static void squash_message(struct commit *commit, struct commit_list *remotehead
while ((commit = get_revision(&rev)) != NULL) {
strbuf_addch(&out, '\n');
strbuf_addf(&out, "commit %s\n",
- sha1_to_hex(commit->object.sha1));
+ oid_to_hex(&commit->object.oid));
pretty_print_commit(&ctx, commit, &out);
}
- if (write_in_full(fd, out.buf, out.len) != out.len)
- die_errno(_("Writing SQUASH_MSG"));
- if (close(fd))
- die_errno(_("Finishing SQUASH_MSG"));
+ write_file_buf(git_path_squash_msg(), out.buf, out.len);
strbuf_release(&out);
}
@@ -379,7 +379,7 @@ static void finish(struct commit *head_commit,
const unsigned char *new_head, const char *msg)
{
struct strbuf reflog_message = STRBUF_INIT;
- const unsigned char *head = head_commit->object.sha1;
+ const unsigned char *head = head_commit->object.oid.hash;
if (!msg)
strbuf_addstr(&reflog_message, getenv("GIT_REFLOG_ACTION"));
@@ -398,11 +398,12 @@ static void finish(struct commit *head_commit,
const char *argv_gc_auto[] = { "gc", "--auto", NULL };
update_ref(reflog_message.buf, "HEAD",
new_head, head, 0,
- DIE_ON_ERR);
+ UPDATE_REFS_DIE_ON_ERR);
/*
* We ignore errors in 'gc --auto', since the
* user should see them.
*/
+ close_all_packs();
run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
}
}
@@ -421,7 +422,7 @@ static void finish(struct commit *head_commit,
}
/* Run a post-merge hook */
- run_hook(NULL, "post-merge", squash ? "1" : "0", NULL);
+ run_hook_le(NULL, "post-merge", squash ? "1" : "0", NULL);
strbuf_release(&reflog_message);
}
@@ -491,40 +492,18 @@ static void merge_name(const char *remote, struct strbuf *msg)
}
if (len) {
struct strbuf truname = STRBUF_INIT;
- strbuf_addstr(&truname, "refs/heads/");
- strbuf_addstr(&truname, remote);
+ strbuf_addf(&truname, "refs/heads/%s", remote);
strbuf_setlen(&truname, truname.len - len);
if (ref_exists(truname.buf)) {
strbuf_addf(msg,
"%s\t\tbranch '%s'%s of .\n",
- sha1_to_hex(remote_head->object.sha1),
+ oid_to_hex(&remote_head->object.oid),
truname.buf + 11,
(early ? " (early part)" : ""));
strbuf_release(&truname);
goto cleanup;
}
- }
-
- if (!strcmp(remote, "FETCH_HEAD") &&
- !access(git_path("FETCH_HEAD"), R_OK)) {
- const char *filename;
- FILE *fp;
- struct strbuf line = STRBUF_INIT;
- char *ptr;
-
- filename = git_path("FETCH_HEAD");
- fp = fopen(filename, "r");
- if (!fp)
- die_errno(_("could not open '%s' for reading"),
- filename);
- strbuf_getline(&line, fp, '\n');
- fclose(fp);
- ptr = strstr(line.buf, "\tnot-for-merge\t");
- if (ptr)
- strbuf_remove(&line, ptr-line.buf+1, 13);
- strbuf_addbuf(msg, &line);
- strbuf_release(&line);
- goto cleanup;
+ strbuf_release(&truname);
}
if (remote_head->util) {
@@ -532,7 +511,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
desc = merge_remote_util(remote_head);
if (desc && desc->obj && desc->obj->type == OBJ_TAG) {
strbuf_addf(msg, "%s\t\t%s '%s'\n",
- sha1_to_hex(desc->obj->sha1),
+ oid_to_hex(&desc->obj->oid),
typename(desc->obj->type),
remote);
goto cleanup;
@@ -540,7 +519,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
}
strbuf_addf(msg, "%s\t\tcommit '%s'\n",
- sha1_to_hex(remote_head->object.sha1), remote);
+ oid_to_hex(&remote_head->object.oid), remote);
cleanup:
strbuf_release(&buf);
strbuf_release(&bname);
@@ -557,7 +536,7 @@ static void parse_branch_merge_options(char *bmo)
if (argc < 0)
die(_("Bad branch.%s.mergeoptions string: %s"), branch,
split_cmdline_strerror(argc));
- argv = xrealloc(argv, sizeof(*argv) * (argc + 2));
+ REALLOC_ARRAY(argv, argc + 2);
memmove(argv + 1, argv, sizeof(*argv) * (argc + 1));
argc++;
argv[0] = "branch.*.mergeoptions";
@@ -657,22 +636,18 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
struct commit_list *remoteheads,
struct commit *head, const char *head_arg)
{
- int index_fd;
- struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
+ static struct lock_file lock;
- index_fd = hold_locked_index(lock, 1);
+ hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
refresh_cache(REFRESH_QUIET);
if (active_cache_changed &&
- (write_cache(index_fd, active_cache, active_nr) ||
- commit_locked_index(lock)))
+ write_locked_index(&the_index, &lock, COMMIT_LOCK))
return error(_("Unable to write index."));
- rollback_lock_file(lock);
+ rollback_lock_file(&lock);
if (!strcmp(strategy, "recursive") || !strcmp(strategy, "subtree")) {
int clean, x;
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;
struct commit_list *j;
@@ -700,14 +675,15 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
for (j = common; j; j = j->next)
commit_list_insert(j->item, &reversed);
- index_fd = hold_locked_index(lock, 1);
+ hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
clean = merge_recursive(&o, head,
remoteheads->item, reversed, &result);
+ if (clean < 0)
+ exit(128);
if (active_cache_changed &&
- (write_cache(index_fd, active_cache, active_nr) ||
- commit_locked_index(lock)))
+ write_locked_index(&the_index, &lock, COMMIT_LOCK))
die (_("unable to write %s"), get_index_file());
- rollback_lock_file(lock);
+ rollback_lock_file(&lock);
return clean ? 0 : 1;
} else {
return try_merge_command(strategy, xopts_nr, xopts,
@@ -734,42 +710,17 @@ static int count_unmerged_entries(void)
return ret;
}
-static void split_merge_strategies(const char *string, struct strategy **list,
- int *nr, int *alloc)
-{
- char *p, *q, *buf;
-
- if (!string)
- return;
-
- buf = xstrdup(string);
- q = buf;
- for (;;) {
- p = strchr(q, ' ');
- if (!p) {
- ALLOC_GROW(*list, *nr + 1, *alloc);
- (*list)[(*nr)++].name = xstrdup(q);
- free(buf);
- return;
- } else {
- *p = '\0';
- ALLOC_GROW(*list, *nr + 1, *alloc);
- (*list)[(*nr)++].name = xstrdup(q);
- q = ++p;
- }
- }
-}
-
static void add_strategies(const char *string, unsigned attr)
{
- struct strategy *list = NULL;
- int list_alloc = 0, list_nr = 0, i;
-
- memset(&list, 0, sizeof(list));
- split_merge_strategies(string, &list, &list_nr, &list_alloc);
- if (list) {
- for (i = 0; i < list_nr; i++)
- append_strategy(get_strategy(list[i].name));
+ int i;
+
+ if (string) {
+ struct string_list list = STRING_LIST_INIT_DUP;
+ struct string_list_item *item;
+ string_list_split(&list, string, ' ', -1);
+ for_each_string_list_item(item, &list)
+ append_strategy(get_strategy(item->string));
+ string_list_clear(&list, 0);
return;
}
for (i = 0; i < ARRAY_SIZE(all_strategy); i++)
@@ -778,21 +729,9 @@ static void add_strategies(const char *string, unsigned attr)
}
-static void write_merge_msg(struct strbuf *msg)
-{
- const char *filename = git_path("MERGE_MSG");
- int fd = open(filename, O_WRONLY | O_CREAT, 0666);
- if (fd < 0)
- die_errno(_("Could not open '%s' for writing"),
- filename);
- if (write_in_full(fd, msg->buf, msg->len) != msg->len)
- die_errno(_("Could not write to '%s'"), filename);
- close(fd);
-}
-
static void read_merge_msg(struct strbuf *msg)
{
- const char *filename = git_path("MERGE_MSG");
+ const char *filename = git_path_merge_msg();
strbuf_reset(msg);
if (strbuf_read_file(msg, filename, 0) < 0)
die_errno(_("Could not read from '%s'"), filename);
@@ -823,16 +762,16 @@ static void prepare_to_commit(struct commit_list *remoteheads)
strbuf_addch(&msg, '\n');
if (0 < option_edit)
strbuf_commented_addf(&msg, _(merge_editor_comment), comment_line_char);
- write_merge_msg(&msg);
- if (run_hook(get_index_file(), "prepare-commit-msg",
- git_path("MERGE_MSG"), "merge", NULL, NULL))
+ write_file_buf(git_path_merge_msg(), msg.buf, msg.len);
+ if (run_commit_hook(0 < option_edit, get_index_file(), "prepare-commit-msg",
+ git_path_merge_msg(), "merge", NULL))
abort_commit(remoteheads, NULL);
if (0 < option_edit) {
- if (launch_editor(git_path("MERGE_MSG"), NULL, NULL))
+ if (launch_editor(git_path_merge_msg(), NULL, NULL))
abort_commit(remoteheads, NULL);
}
read_merge_msg(&msg);
- stripspace(&msg, 0 < option_edit);
+ strbuf_stripspace(&msg, 0 < option_edit);
if (!msg.len)
abort_commit(remoteheads, _("Empty commit message."));
strbuf_release(&merge_msg);
@@ -843,17 +782,23 @@ static void prepare_to_commit(struct commit_list *remoteheads)
static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
{
unsigned char result_tree[20], result_commit[20];
- struct commit_list *parent = xmalloc(sizeof(*parent));
+ struct commit_list *parents, **pptr = &parents;
+ static struct lock_file lock;
+
+ hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
+ refresh_cache(REFRESH_QUIET);
+ if (active_cache_changed &&
+ write_locked_index(&the_index, &lock, COMMIT_LOCK))
+ return error(_("Unable to write index."));
+ rollback_lock_file(&lock);
write_tree_trivial(result_tree);
printf(_("Wonderful.\n"));
- parent->item = head;
- parent->next = xmalloc(sizeof(*parent->next));
- parent->next->item = remoteheads->item;
- parent->next->next = NULL;
+ pptr = commit_list_append(head, pptr);
+ pptr = commit_list_append(remoteheads->item, pptr);
prepare_to_commit(remoteheads);
- if (commit_tree(&merge_msg, result_tree, parent, result_commit, NULL,
- sign_commit))
+ if (commit_tree(merge_msg.buf, merge_msg.len, result_tree, parents,
+ result_commit, NULL, sign_commit))
die(_("failed to write commit object"));
finish(head, remoteheads, result_commit, "In-index merge");
drop_save();
@@ -877,8 +822,8 @@ static int finish_automerge(struct commit *head,
commit_list_insert(head, &parents);
strbuf_addch(&merge_msg, '\n');
prepare_to_commit(remoteheads);
- if (commit_tree(&merge_msg, result_tree, parents, result_commit,
- NULL, sign_commit))
+ if (commit_tree(merge_msg.buf, merge_msg.len, result_tree, parents,
+ result_commit, NULL, sign_commit))
die(_("failed to write commit object"));
strbuf_addf(&buf, "Merge made by the '%s' strategy.", wt_strategy);
finish(head, remoteheads, result_commit, buf.buf);
@@ -887,28 +832,20 @@ static int finish_automerge(struct commit *head,
return 0;
}
-static int suggest_conflicts(int renormalizing)
+static int suggest_conflicts(void)
{
const char *filename;
FILE *fp;
- int pos;
+ struct strbuf msgbuf = STRBUF_INIT;
- filename = git_path("MERGE_MSG");
+ filename = git_path_merge_msg();
fp = fopen(filename, "a");
if (!fp)
die_errno(_("Could not open '%s' for writing"), filename);
- fprintf(fp, "\nConflicts:\n");
- for (pos = 0; pos < active_nr; pos++) {
- const struct cache_entry *ce = active_cache[pos];
-
- if (ce_stage(ce)) {
- fprintf(fp, "\t%s\n", ce->name);
- while (pos + 1 < active_nr &&
- !strcmp(ce->name,
- active_cache[pos + 1]->name))
- pos++;
- }
- }
+
+ append_conflicts_hint(&msgbuf);
+ fputs(msgbuf.buf, fp);
+ strbuf_release(&msgbuf);
fclose(fp);
rerere(allow_rerere_auto);
printf(_("Automatic merge failed; "
@@ -928,7 +865,7 @@ static struct commit *is_old_style_invocation(int argc, const char **argv,
second_token = lookup_commit_reference_gently(second_sha1, 0);
if (!second_token)
die(_("'%s' is not a commit"), argv[1]);
- if (hashcmp(second_token->object.sha1, head))
+ if (hashcmp(second_token->object.oid.hash, head))
return NULL;
}
return second_token;
@@ -969,12 +906,12 @@ static int setup_with_upstream(const char ***argv)
if (!branch)
die(_("No current branch."));
- if (!branch->remote)
+ if (!branch->remote_name)
die(_("No remote for the current branch."));
if (!branch->merge_nr)
die(_("No default upstream defined for the current branch."));
- args = xcalloc(branch->merge_nr + 1, sizeof(char *));
+ args = xcalloc(st_add(branch->merge_nr, 1), sizeof(char *));
for (i = 0; i < branch->merge_nr; i++) {
if (!branch->merge[i]->dst)
die(_("No remote-tracking branch for %s from %s"),
@@ -988,41 +925,27 @@ static int setup_with_upstream(const char ***argv)
static void write_merge_state(struct commit_list *remoteheads)
{
- const char *filename;
- int fd;
struct commit_list *j;
struct strbuf buf = STRBUF_INIT;
for (j = remoteheads; j; j = j->next) {
- unsigned const char *sha1;
+ struct object_id *oid;
struct commit *c = j->item;
if (c->util && merge_remote_util(c)->obj) {
- sha1 = merge_remote_util(c)->obj->sha1;
+ oid = &merge_remote_util(c)->obj->oid;
} else {
- sha1 = c->object.sha1;
+ oid = &c->object.oid;
}
- strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1));
+ strbuf_addf(&buf, "%s\n", oid_to_hex(oid));
}
- filename = git_path("MERGE_HEAD");
- fd = open(filename, O_WRONLY | O_CREAT, 0666);
- if (fd < 0)
- die_errno(_("Could not open '%s' for writing"), filename);
- if (write_in_full(fd, buf.buf, buf.len) != buf.len)
- die_errno(_("Could not write to '%s'"), filename);
- close(fd);
+ write_file_buf(git_path_merge_head(), buf.buf, buf.len);
strbuf_addch(&merge_msg, '\n');
- write_merge_msg(&merge_msg);
+ write_file_buf(git_path_merge_msg(), merge_msg.buf, merge_msg.len);
- filename = git_path("MERGE_MODE");
- fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
- if (fd < 0)
- die_errno(_("Could not open '%s' for writing"), filename);
strbuf_reset(&buf);
if (fast_forward == FF_NO)
- strbuf_addf(&buf, "no-ff");
- if (write_in_full(fd, buf.buf, buf.len) != buf.len)
- die_errno(_("Could not write to '%s'"), filename);
- close(fd);
+ strbuf_addstr(&buf, "no-ff");
+ write_file_buf(git_path_merge_mode(), buf.buf, buf.len);
}
static int default_edit_option(void)
@@ -1038,7 +961,7 @@ static int default_edit_option(void)
if (e) {
int v = git_config_maybe_bool(name, e);
if (v < 0)
- die("Bad value '%s' in environment '%s'", e, name);
+ die(_("Bad value '%s' in environment '%s'"), e, name);
return v;
}
@@ -1051,38 +974,144 @@ static int default_edit_option(void)
st_stdin.st_mode == st_stdout.st_mode);
}
+static struct commit_list *reduce_parents(struct commit *head_commit,
+ int *head_subsumed,
+ struct commit_list *remoteheads)
+{
+ struct commit_list *parents, **remotes;
+
+ /*
+ * Is the current HEAD reachable from another commit being
+ * merged? If so we do not want to record it as a parent of
+ * the resulting merge, unless --no-ff is given. We will flip
+ * this variable to 0 when we find HEAD among the independent
+ * tips being merged.
+ */
+ *head_subsumed = 1;
+
+ /* Find what parents to record by checking independent ones. */
+ parents = reduce_heads(remoteheads);
+
+ remoteheads = NULL;
+ remotes = &remoteheads;
+ while (parents) {
+ struct commit *commit = pop_commit(&parents);
+ if (commit == head_commit)
+ *head_subsumed = 0;
+ else
+ remotes = &commit_list_insert(commit, remotes)->next;
+ }
+ return remoteheads;
+}
+
+static void prepare_merge_message(struct strbuf *merge_names, struct strbuf *merge_msg)
+{
+ struct fmt_merge_msg_opts opts;
+
+ memset(&opts, 0, sizeof(opts));
+ opts.add_title = !have_message;
+ opts.shortlog_len = shortlog_len;
+ opts.credit_people = (0 < option_edit);
+
+ fmt_merge_msg(merge_names, merge_msg, &opts);
+ if (merge_msg->len)
+ strbuf_setlen(merge_msg, merge_msg->len - 1);
+}
+
+static void handle_fetch_head(struct commit_list **remotes, struct strbuf *merge_names)
+{
+ const char *filename;
+ int fd, pos, npos;
+ struct strbuf fetch_head_file = STRBUF_INIT;
+
+ if (!merge_names)
+ merge_names = &fetch_head_file;
+
+ filename = git_path_fetch_head();
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ die_errno(_("could not open '%s' for reading"), filename);
+
+ if (strbuf_read(merge_names, fd, 0) < 0)
+ die_errno(_("could not read '%s'"), filename);
+ if (close(fd) < 0)
+ die_errno(_("could not close '%s'"), filename);
+
+ for (pos = 0; pos < merge_names->len; pos = npos) {
+ unsigned char sha1[20];
+ char *ptr;
+ struct commit *commit;
+
+ ptr = strchr(merge_names->buf + pos, '\n');
+ if (ptr)
+ npos = ptr - merge_names->buf + 1;
+ else
+ npos = merge_names->len;
+
+ if (npos - pos < 40 + 2 ||
+ get_sha1_hex(merge_names->buf + pos, sha1))
+ commit = NULL; /* bad */
+ else if (memcmp(merge_names->buf + pos + 40, "\t\t", 2))
+ continue; /* not-for-merge */
+ else {
+ char saved = merge_names->buf[pos + 40];
+ merge_names->buf[pos + 40] = '\0';
+ commit = get_merge_parent(merge_names->buf + pos);
+ merge_names->buf[pos + 40] = saved;
+ }
+ if (!commit) {
+ if (ptr)
+ *ptr = '\0';
+ die(_("not something we can merge in %s: %s"),
+ filename, merge_names->buf + pos);
+ }
+ remotes = &commit_list_insert(commit, remotes)->next;
+ }
+
+ if (merge_names == &fetch_head_file)
+ strbuf_release(&fetch_head_file);
+}
+
static struct commit_list *collect_parents(struct commit *head_commit,
int *head_subsumed,
- int argc, const char **argv)
+ int argc, const char **argv,
+ struct strbuf *merge_msg)
{
int i;
- struct commit_list *remoteheads = NULL, *parents, *next;
+ struct commit_list *remoteheads = NULL;
struct commit_list **remotes = &remoteheads;
+ struct strbuf merge_names = STRBUF_INIT, *autogen = NULL;
+
+ if (merge_msg && (!have_message || shortlog_len))
+ autogen = &merge_names;
if (head_commit)
remotes = &commit_list_insert(head_commit, remotes)->next;
- for (i = 0; i < argc; i++) {
- struct commit *commit = get_merge_parent(argv[i]);
- if (!commit)
- help_unknown_ref(argv[i], "merge",
- "not something we can merge");
- remotes = &commit_list_insert(commit, remotes)->next;
- }
- *remotes = NULL;
- parents = reduce_heads(remoteheads);
-
- *head_subsumed = 1; /* we will flip this to 0 when we find it */
- for (remoteheads = NULL, remotes = &remoteheads;
- parents;
- parents = next) {
- struct commit *commit = parents->item;
- next = parents->next;
- if (commit == head_commit)
- *head_subsumed = 0;
- else
+ if (argc == 1 && !strcmp(argv[0], "FETCH_HEAD")) {
+ handle_fetch_head(remotes, autogen);
+ remoteheads = reduce_parents(head_commit, head_subsumed, remoteheads);
+ } else {
+ for (i = 0; i < argc; i++) {
+ struct commit *commit = get_merge_parent(argv[i]);
+ if (!commit)
+ help_unknown_ref(argv[i], "merge",
+ _("not something we can merge"));
remotes = &commit_list_insert(commit, remotes)->next;
+ }
+ remoteheads = reduce_parents(head_commit, head_subsumed, remoteheads);
+ if (autogen) {
+ struct commit_list *p;
+ for (p = remoteheads; p; p = p->next)
+ merge_name(merge_remote_util(p->item)->name, autogen);
+ }
}
+
+ if (autogen) {
+ prepare_merge_message(autogen, merge_msg);
+ strbuf_release(autogen);
+ }
+
return remoteheads;
}
@@ -1094,12 +1123,13 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
struct commit *head_commit;
struct strbuf buf = STRBUF_INIT;
const char *head_arg;
- int flag, i, ret = 0, head_subsumed;
+ int i, ret = 0, head_subsumed;
int best_cnt = -1, merge_was_ok = 0, automerge_was_ok = 0;
struct commit_list *common = NULL;
const char *best_strategy = NULL, *wt_strategy = NULL;
struct commit_list *remoteheads, *p;
void *branch_to_free;
+ int orig_argc = argc;
if (argc == 2 && !strcmp(argv[1], "-h"))
usage_with_options(builtin_merge_usage, builtin_merge_options);
@@ -1108,7 +1138,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* Check if we are _not_ on a detached HEAD, i.e. if there is a
* current branch.
*/
- branch = branch_to_free = resolve_refdup("HEAD", head_sha1, 0, &flag);
+ branch = branch_to_free = resolve_refdup("HEAD", 0, head_sha1, NULL);
if (branch && starts_with(branch, "refs/heads/"))
branch += 11;
if (!branch || is_null_sha1(head_sha1))
@@ -1116,6 +1146,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
else
head_commit = lookup_commit_or_die(head_sha1, "HEAD");
+ init_diff_ui_defaults();
git_config(git_merge_config, NULL);
if (branch_mergeoptions)
@@ -1132,7 +1163,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
int nargc = 2;
const char *nargv[] = {"reset", "--merge", NULL};
- if (!file_exists(git_path("MERGE_HEAD")))
+ if (orig_argc != 2)
+ usage_msg_opt(_("--abort expects no arguments"),
+ builtin_merge_usage, builtin_merge_options);
+
+ if (!file_exists(git_path_merge_head()))
die(_("There is no merge to abort (MERGE_HEAD missing)."));
/* Invoke 'git reset --merge' */
@@ -1140,24 +1175,40 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
goto done;
}
+ if (continue_current_merge) {
+ int nargc = 1;
+ const char *nargv[] = {"commit", NULL};
+
+ if (orig_argc != 2)
+ usage_msg_opt(_("--continue expects no arguments"),
+ builtin_merge_usage, builtin_merge_options);
+
+ if (!file_exists(git_path_merge_head()))
+ die(_("There is no merge in progress (MERGE_HEAD missing)."));
+
+ /* Invoke 'git commit' */
+ ret = cmd_commit(nargc, nargv, prefix);
+ goto done;
+ }
+
if (read_cache_unmerged())
die_resolve_conflict("merge");
- if (file_exists(git_path("MERGE_HEAD"))) {
+ if (file_exists(git_path_merge_head())) {
/*
* There is no unmerged entry, don't advise 'git
* add/rm <file>', just 'git commit'.
*/
if (advice_resolve_conflict)
die(_("You have not concluded your merge (MERGE_HEAD exists).\n"
- "Please, commit your changes before you can merge."));
+ "Please, commit your changes before you merge."));
else
die(_("You have not concluded your merge (MERGE_HEAD exists)."));
}
- if (file_exists(git_path("CHERRY_PICK_HEAD"))) {
+ if (file_exists(git_path_cherry_pick_head())) {
if (advice_resolve_conflict)
die(_("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists).\n"
- "Please, commit your changes before you can merge."));
+ "Please, commit your changes before you merge."));
else
die(_("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists)."));
}
@@ -1172,61 +1223,62 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
option_commit = 0;
}
- if (!abort_current_merge) {
- if (!argc) {
- if (default_to_upstream)
- argc = setup_with_upstream(&argv);
- else
- die(_("No commit specified and merge.defaultToUpstream not set."));
- } else if (argc == 1 && !strcmp(argv[0], "-"))
- argv[0] = "@{-1}";
+ if (!argc) {
+ if (default_to_upstream)
+ argc = setup_with_upstream(&argv);
+ else
+ die(_("No commit specified and merge.defaultToUpstream not set."));
+ } else if (argc == 1 && !strcmp(argv[0], "-")) {
+ argv[0] = "@{-1}";
}
+
if (!argc)
usage_with_options(builtin_merge_usage,
builtin_merge_options);
- /*
- * This could be traditional "merge <msg> HEAD <commit>..." and
- * the way we can tell it is to see if the second token is HEAD,
- * but some people might have misused the interface and used a
- * commit-ish that is the same as HEAD there instead.
- * Traditional format never would have "-m" so it is an
- * additional safety measure to check for it.
- */
-
- if (!have_message && head_commit &&
- is_old_style_invocation(argc, argv, head_commit->object.sha1)) {
- strbuf_addstr(&merge_msg, argv[0]);
- head_arg = argv[1];
- argv += 2;
- argc -= 2;
- remoteheads = collect_parents(head_commit, &head_subsumed, argc, argv);
- } else if (!head_commit) {
- struct commit *remote_head;
+ if (!head_commit) {
/*
* If the merged head is a valid one there is no reason
* to forbid "git merge" into a branch yet to be born.
* We do the same for "git pull".
*/
- if (argc != 1)
- die(_("Can merge only exactly one commit into "
- "empty head"));
+ unsigned char *remote_head_sha1;
if (squash)
die(_("Squash commit into empty head not supported yet"));
if (fast_forward == FF_NO)
die(_("Non-fast-forward commit does not make sense into "
"an empty head"));
- remoteheads = collect_parents(head_commit, &head_subsumed, argc, argv);
- remote_head = remoteheads->item;
- if (!remote_head)
+ remoteheads = collect_parents(head_commit, &head_subsumed,
+ argc, argv, NULL);
+ if (!remoteheads)
die(_("%s - not something we can merge"), argv[0]);
- read_empty(remote_head->object.sha1, 0);
- update_ref("initial pull", "HEAD", remote_head->object.sha1,
- NULL, 0, DIE_ON_ERR);
+ if (remoteheads->next)
+ die(_("Can merge only exactly one commit into empty head"));
+ remote_head_sha1 = remoteheads->item->object.oid.hash;
+ read_empty(remote_head_sha1, 0);
+ update_ref("initial pull", "HEAD", remote_head_sha1,
+ NULL, 0, UPDATE_REFS_DIE_ON_ERR);
goto done;
- } else {
- struct strbuf merge_names = STRBUF_INIT;
+ }
+ /*
+ * This could be traditional "merge <msg> HEAD <commit>..." and
+ * the way we can tell it is to see if the second token is HEAD,
+ * but some people might have misused the interface and used a
+ * commit-ish that is the same as HEAD there instead.
+ * Traditional format never would have "-m" so it is an
+ * additional safety measure to check for it.
+ */
+ if (!have_message &&
+ is_old_style_invocation(argc, argv, head_commit->object.oid.hash)) {
+ warning("old-style 'git merge <msg> HEAD <commit>' is deprecated.");
+ strbuf_addstr(&merge_msg, argv[0]);
+ head_arg = argv[1];
+ argv += 2;
+ argc -= 2;
+ remoteheads = collect_parents(head_commit, &head_subsumed,
+ argc, argv, NULL);
+ } else {
/* We are invoked directly as the first-class UI. */
head_arg = "HEAD";
@@ -1235,21 +1287,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* the standard merge summary message to be appended
* to the given message.
*/
- remoteheads = collect_parents(head_commit, &head_subsumed, argc, argv);
- for (p = remoteheads; p; p = p->next)
- merge_name(merge_remote_util(p->item)->name, &merge_names);
-
- if (!have_message || shortlog_len) {
- struct fmt_merge_msg_opts opts;
- memset(&opts, 0, sizeof(opts));
- opts.add_title = !have_message;
- opts.shortlog_len = shortlog_len;
- opts.credit_people = (0 < option_edit);
-
- fmt_merge_msg(&merge_names, &merge_msg, &opts);
- if (merge_msg.len)
- strbuf_setlen(&merge_msg, merge_msg.len - 1);
- }
+ remoteheads = collect_parents(head_commit, &head_subsumed,
+ argc, argv, &merge_msg);
}
if (!head_commit || !argc)
@@ -1259,13 +1298,13 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
if (verify_signatures) {
for (p = remoteheads; p; p = p->next) {
struct commit *commit = p->item;
- char hex[41];
+ char hex[GIT_SHA1_HEXSZ + 1];
struct signature_check signature_check;
memset(&signature_check, 0, sizeof(signature_check));
check_commit_signature(commit, &signature_check);
- strcpy(hex, find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV));
+ find_unique_abbrev_r(hex, commit->object.oid.hash, DEFAULT_ABBREV);
switch (signature_check.result) {
case 'G':
break;
@@ -1282,10 +1321,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
printf(_("Commit %s has a good GPG signature by %s\n"),
hex, signature_check.signer);
- free(signature_check.gpg_output);
- free(signature_check.gpg_status);
- free(signature_check.signer);
- free(signature_check.key);
+ signature_check_clear(&signature_check);
}
}
@@ -1298,7 +1334,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
for (p = remoteheads; p; p = p->next) {
struct commit *commit = p->item;
strbuf_addf(&buf, "GITHEAD_%s",
- sha1_to_hex(commit->object.sha1));
+ oid_to_hex(&commit->object.oid));
setenv(buf.buf, merge_remote_util(commit)->name, 1);
strbuf_reset(&buf);
if (fast_forward != FF_ONLY &&
@@ -1330,7 +1366,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
if (!remoteheads)
; /* already up-to-date */
else if (!remoteheads->next)
- common = get_merge_bases(head_commit, remoteheads->item, 1);
+ common = get_merge_bases(head_commit, remoteheads->item);
else {
struct commit_list *list = remoteheads;
commit_list_insert(head_commit, &list);
@@ -1338,35 +1374,37 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
free(list);
}
- update_ref("updating ORIG_HEAD", "ORIG_HEAD", head_commit->object.sha1,
- NULL, 0, DIE_ON_ERR);
+ update_ref("updating ORIG_HEAD", "ORIG_HEAD", head_commit->object.oid.hash,
+ NULL, 0, UPDATE_REFS_DIE_ON_ERR);
- if (remoteheads && !common)
- ; /* No common ancestors found. We need a real merge. */
- else if (!remoteheads ||
+ if (remoteheads && !common) {
+ /* No common ancestors found. */
+ if (!allow_unrelated_histories)
+ die(_("refusing to merge unrelated histories"));
+ /* otherwise, we need a real merge. */
+ } else if (!remoteheads ||
(!remoteheads->next && !common->next &&
common->item == remoteheads->item)) {
/*
* If head can reach all the merge then we are up to date.
* but first the most common case of merging one remote.
*/
- finish_up_to_date("Already up-to-date.");
+ finish_up_to_date(_("Already up-to-date."));
goto done;
} else if (fast_forward != FF_NO && !remoteheads->next &&
!common->next &&
- !hashcmp(common->item->object.sha1, head_commit->object.sha1)) {
+ !oidcmp(&common->item->object.oid, &head_commit->object.oid)) {
/* Again the most common case of merging one remote. */
struct strbuf msg = STRBUF_INIT;
struct commit *commit;
- char hex[41];
-
- strcpy(hex, find_unique_abbrev(head_commit->object.sha1, DEFAULT_ABBREV));
- if (verbosity >= 0)
+ if (verbosity >= 0) {
printf(_("Updating %s..%s\n"),
- hex,
- find_unique_abbrev(remoteheads->item->object.sha1,
- DEFAULT_ABBREV));
+ find_unique_abbrev(head_commit->object.oid.hash,
+ DEFAULT_ABBREV),
+ find_unique_abbrev(remoteheads->item->object.oid.hash,
+ DEFAULT_ABBREV));
+ }
strbuf_addstr(&msg, "Fast-forward");
if (have_message)
strbuf_addstr(&msg,
@@ -1377,14 +1415,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
goto done;
}
- if (checkout_fast_forward(head_commit->object.sha1,
- commit->object.sha1,
+ if (checkout_fast_forward(head_commit->object.oid.hash,
+ commit->object.oid.hash,
overwrite_ignore)) {
ret = 1;
goto done;
}
- finish(head_commit, remoteheads, commit->object.sha1, msg.buf);
+ finish(head_commit, remoteheads, commit->object.oid.hash, msg.buf);
drop_save();
goto done;
} else if (!remoteheads->next && common->next)
@@ -1403,9 +1441,9 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
/* See if it is really trivial. */
git_committer_info(IDENT_STRICT);
printf(_("Trying really trivial in-index merge...\n"));
- if (!read_tree_trivial(common->item->object.sha1,
- head_commit->object.sha1,
- remoteheads->item->object.sha1)) {
+ if (!read_tree_trivial(common->item->object.oid.hash,
+ head_commit->object.oid.hash,
+ remoteheads->item->object.oid.hash)) {
ret = merge_trivial(head_commit, remoteheads);
goto done;
}
@@ -1427,15 +1465,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* merge_bases again, otherwise "git merge HEAD^
* HEAD^^" would be missed.
*/
- common_one = get_merge_bases(head_commit, j->item, 1);
- if (hashcmp(common_one->item->object.sha1,
- j->item->object.sha1)) {
+ common_one = get_merge_bases(head_commit, j->item);
+ if (oidcmp(&common_one->item->object.oid, &j->item->object.oid)) {
up_to_date = 0;
break;
}
}
if (up_to_date) {
- finish_up_to_date("Already up-to-date. Yeeah!");
+ finish_up_to_date(_("Already up-to-date. Yeeah!"));
goto done;
}
}
@@ -1459,13 +1496,13 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* Stash away the local changes so that we can try more than one.
*/
save_state(stash))
- hashcpy(stash, null_sha1);
+ hashclr(stash);
for (i = 0; i < use_strategies_nr; i++) {
int ret;
if (i) {
printf(_("Rewinding the tree to pristine...\n"));
- restore_state(head_commit->object.sha1, stash);
+ restore_state(head_commit->object.oid.hash, stash);
}
if (use_strategies_nr != 1)
printf(_("Trying merge strategy %s...\n"),
@@ -1531,7 +1568,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* it up.
*/
if (!best_strategy) {
- restore_state(head_commit->object.sha1, stash);
+ restore_state(head_commit->object.oid.hash, stash);
if (use_strategies_nr > 1)
fprintf(stderr,
_("No merge strategy handled the merge.\n"));
@@ -1544,7 +1581,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
; /* We already have its result in the working tree. */
else {
printf(_("Rewinding the tree to pristine...\n"));
- restore_state(head_commit->object.sha1, stash);
+ restore_state(head_commit->object.oid.hash, stash);
printf(_("Using the %s to prepare resolving by hand.\n"),
best_strategy);
try_merge_strategy(best_strategy, common, remoteheads,
@@ -1560,7 +1597,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
fprintf(stderr, _("Automatic merge went well; "
"stopped before committing as requested\n"));
else
- ret = suggest_conflicts(option_renormalize);
+ ret = suggest_conflicts();
done:
free(branch_to_free);