1 files changed, 51 insertions, 65 deletions

diff --git a/builtin/merge.c b/builtin/merge.c
index 41fb66d..3b0f8f9 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 +29,7 @@
 #include "remote.h"
 #include "fmt-merge-msg.h"
 #include "gpg-interface.h"
+#include "sequencer.h"
 
 #define DEFAULT_TWOHEAD (1<<0)
 #define DEFAULT_OCTOPUS (1<<1)
@@ -40,8 +42,8 @@ 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"),
 	NULL
 };
@@ -63,7 +65,7 @@ static int verbosity;
 static int allow_rerere_auto;
 static int abort_current_merge;
 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[] = {
@@ -220,7 +222,7 @@ static struct option builtin_merge_options[] = {
 	OPT_BOOL(0, "abort", &abort_current_merge,
 		N_("abort the current in-progress merge")),
 	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()
@@ -237,11 +239,10 @@ static void drop_save(void)
 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;
@@ -367,7 +368,7 @@ static void squash_message(struct commit *commit, struct commit_list *remotehead
 			sha1_to_hex(commit->object.sha1));
 		pretty_print_commit(&ctx, commit, &out);
 	}
-	if (write(fd, out.buf, out.len) < 0)
+	if (write_in_full(fd, out.buf, out.len) != out.len)
 		die_errno(_("Writing SQUASH_MSG"));
 	if (close(fd))
 		die_errno(_("Finishing SQUASH_MSG"));
@@ -398,7 +399,7 @@ 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.
@@ -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);
 }
@@ -446,17 +447,17 @@ static void merge_name(const char *remote, struct strbuf *msg)
 		die(_("'%s' does not point to a commit"), remote);
 
 	if (dwim_ref(remote, strlen(remote), branch_head, &found_ref) > 0) {
-		if (!prefixcmp(found_ref, "refs/heads/")) {
+		if (starts_with(found_ref, "refs/heads/")) {
 			strbuf_addf(msg, "%s\t\tbranch '%s' of .\n",
 				    sha1_to_hex(branch_head), remote);
 			goto cleanup;
 		}
-		if (!prefixcmp(found_ref, "refs/tags/")) {
+		if (starts_with(found_ref, "refs/tags/")) {
 			strbuf_addf(msg, "%s\t\ttag '%s' of .\n",
 				    sha1_to_hex(branch_head), remote);
 			goto cleanup;
 		}
-		if (!prefixcmp(found_ref, "refs/remotes/")) {
+		if (starts_with(found_ref, "refs/remotes/")) {
 			strbuf_addf(msg, "%s\t\tremote-tracking branch '%s' of .\n",
 				    sha1_to_hex(branch_head), remote);
 			goto cleanup;
@@ -557,7 +558,7 @@ 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";
@@ -570,8 +571,8 @@ static int git_merge_config(const char *k, const char *v, void *cb)
 {
 	int status;
 
-	if (branch && !prefixcmp(k, "branch.") &&
-		!prefixcmp(k + 7, branch) &&
+	if (branch && starts_with(k, "branch.") &&
+		starts_with(k + 7, branch) &&
 		!strcmp(k + 7 + strlen(branch), ".mergeoptions")) {
 		free(branch_mergeoptions);
 		branch_mergeoptions = xstrdup(v);
@@ -597,6 +598,9 @@ static int git_merge_config(const char *k, const char *v, void *cb)
 	} else if (!strcmp(k, "merge.defaulttoupstream")) {
 		default_to_upstream = git_config_bool(k, v);
 		return 0;
+	} else if (!strcmp(k, "commit.gpgsign")) {
+		sign_commit = git_config_bool(k, v) ? "" : NULL;
+		return 0;
 	}
 
 	status = fmt_merge_msg_config(k, v, cb);
@@ -654,22 +658,18 @@ 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, 1);
 	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;
@@ -697,14 +697,13 @@ 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, 1);
 		clean = merge_recursive(&o, head,
 				remoteheads->item, reversed, &result);
 		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,
@@ -821,8 +820,8 @@ static void prepare_to_commit(struct commit_list *remoteheads)
 	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))
+	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))
@@ -840,17 +839,15 @@ 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;
 
 	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();
@@ -874,8 +871,8 @@ 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);
@@ -884,28 +881,20 @@ 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");
 	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; "
@@ -1105,8 +1094,8 @@ 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);
-	if (branch && !prefixcmp(branch, "refs/heads/"))
+	branch = branch_to_free = resolve_refdup("HEAD", 0, head_sha1, &flag);
+	if (branch && starts_with(branch, "refs/heads/"))
 		branch += 11;
 	if (!branch || is_null_sha1(head_sha1))
 		head_commit = NULL;
@@ -1147,14 +1136,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
 		 */
 		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 (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)."));
 	}
@@ -1219,7 +1208,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
 			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);
+			   NULL, 0, UPDATE_REFS_DIE_ON_ERR);
 		goto done;
 	} else {
 		struct strbuf merge_names = STRBUF_INIT;
@@ -1279,10 +1268,7 @@ 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);
 		}
 	}
 
@@ -1327,7 +1313,7 @@ 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);
@@ -1336,7 +1322,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
 	}
 
 	update_ref("updating ORIG_HEAD", "ORIG_HEAD", head_commit->object.sha1,
-		   NULL, 0, DIE_ON_ERR);
+		   NULL, 0, UPDATE_REFS_DIE_ON_ERR);
 
 	if (remoteheads && !common)
 		; /* No common ancestors found. We need a real merge. */
@@ -1424,7 +1410,7 @@ 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);
+			common_one = get_merge_bases(head_commit, j->item);
 			if (hashcmp(common_one->item->object.sha1,
 				j->item->object.sha1)) {
 				up_to_date = 0;
@@ -1557,7 +1543,7 @@ 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);