Git bisect part3

index 22e669e3b1..e672ee9f18 100644
@@ -169,11 +169,12 @@ static int bisect_reset(const char *commit)
 
 		argv_array_pushl(&argv, "checkout", branch.buf, "--", NULL);
 		if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
+			error(_("could not check out original"
+				" HEAD '%s'. Try 'git bisect"
+				" reset <commit>'."), branch.buf);
 			strbuf_release(&branch);
 			argv_array_clear(&argv);
-			return error(_("could not check out original"
-				       " HEAD '%s'. Try 'git bisect"
-				       "reset <commit>'."), branch.buf);
+			return -1;
 		}
 		argv_array_clear(&argv);
 	}

index e672ee9f18..5093e55273 100644
@@ -206,31 +206,31 @@ static int bisect_write(const char *state, const char *rev,
 	struct object_id oid;
 	struct commit *commit;
 	FILE *fp = NULL;
-	int retval = 0;
+	int res = 0;
 
 	if (!strcmp(state, terms->term_bad)) {
 		strbuf_addf(&tag, "refs/bisect/%s", state);
 	} else if (one_of(state, terms->term_good, "skip", NULL)) {
 		strbuf_addf(&tag, "refs/bisect/%s-%s", state, rev);
 	} else {
-		retval = error(_("Bad bisect_write argument: %s"), state);
+		res = error(_("Bad bisect_write argument: %s"), state);
 		goto finish;
 	}
 
 	if (get_oid(rev, &oid)) {
-		retval = error(_("couldn't get the oid of the rev '%s'"), rev);
+		res = error(_("couldn't get the oid of the rev '%s'"), rev);
 		goto finish;
 	}
 
 	if (update_ref(NULL, tag.buf, &oid, NULL, 0,
 		       UPDATE_REFS_MSG_ON_ERR)) {
-		retval = -1;
+		res = -1;
 		goto finish;
 	}
 
 	fp = fopen(git_path_bisect_log(), "a");
 	if (!fp) {
-		retval = error_errno(_("couldn't open the file '%s'"), git_path_bisect_log());
+		res = error_errno(_("couldn't open the file '%s'"), git_path_bisect_log());
 		goto finish;
 	}
 

@@ -244,7 +244,7 @@ static int bisect_write(const char *state, const char *rev,
 	if (fp)
 		fclose(fp);
 	strbuf_release(&tag);
-	return retval;
+	return res;
 }
 
 static int check_and_set_terms(struct bisect_terms *terms, const char *cmd)

@@ -294,7 +294,7 @@ static const char *need_bisect_start_warning =
 static int bisect_next_check(const struct bisect_terms *terms,
 			     const char *current_term)
 {
-	int missing_good = 1, missing_bad = 1, retval = 0;
+	int missing_good = 1, missing_bad = 1, res = 0;
 	const char *bad_ref = xstrfmt("refs/bisect/%s", terms->term_bad);
 	const char *good_glob = xstrfmt("%s-*", terms->term_good);
 

@@ -308,7 +308,7 @@ static int bisect_next_check(const struct bisect_terms *terms,
 		goto finish;
 
 	if (!current_term) {
-		retval = -1;
+		res = -1;
 		goto finish;
 	}
 

@@ -329,21 +329,21 @@ static int bisect_next_check(const struct bisect_terms *terms,
 		 */
 		yesno = git_prompt(_("Are you sure [Y/n]? "), PROMPT_ECHO);
 		if (starts_with(yesno, "N") || starts_with(yesno, "n"))
-			retval = -1;
+			res = -1;
 		goto finish;
 	}
 	if (!is_empty_or_missing_file(git_path_bisect_start())) {
-		retval = error(_(need_bad_and_good_revision_warning),
+		res = error(_(need_bad_and_good_revision_warning),
 			       vocab_bad, vocab_good, vocab_bad, vocab_good);
 	} else {
-		retval = error(_(need_bisect_start_warning),
+		res = error(_(need_bisect_start_warning),
 			       vocab_good, vocab_bad, vocab_good, vocab_bad);
 	}
 
 finish:
 	free((void *) good_glob);
 	free((void *) bad_ref);
-	return retval;
+	return res;
 }
 
 static int get_terms(struct bisect_terms *terms)

@@ -397,7 +397,7 @@ static int bisect_terms(struct bisect_terms *terms, const char *option)
 
 static int bisect_append_log_quoted(const char **argv)
 {
-	int retval = 0;
+	int res = 0;
 	FILE *fp = fopen(git_path_bisect_log(), "a");
 	struct strbuf orig_args = STRBUF_INIT;
 

@@ -405,25 +405,25 @@ static int bisect_append_log_quoted(const char **argv)
 		return -1;
 
 	if (fprintf(fp, "git bisect start") < 1) {
-		retval = -1;
+		res = -1;
 		goto finish;
 	}
 
 	sq_quote_argv(&orig_args, argv);
 	if (fprintf(fp, "%s\n", orig_args.buf) < 1)
-		retval = -1;
+		res = -1;
 
 finish:
 	fclose(fp);
 	strbuf_release(&orig_args);
-	return retval;
+	return res;
 }
 
 static int bisect_start(struct bisect_terms *terms, int no_checkout,
 			const char **argv, int argc)
 {
 	int i, has_double_dash = 0, must_write_terms = 0, bad_seen = 0;
-	int flags, pathspec_pos, retval = 0;
+	int flags, pathspec_pos, res = 0;
 	struct string_list revs = STRING_LIST_INIT_DUP;
 	struct string_list states = STRING_LIST_INIT_DUP;
 	struct strbuf start_head = STRBUF_INIT;

@@ -524,7 +524,7 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 			argv_array_pushl(&argv, "checkout", start_head.buf,
 					 "--", NULL);
 			if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
-				retval = error(_("checking out '%s' failed."
+				res = error(_("checking out '%s' failed."
 						 " Try 'git bisect start "
 						 "<valid-branch>'."),
 					       start_head.buf);

@@ -574,7 +574,7 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 		get_oid(start_head.buf, &oid);
 		if (update_ref(NULL, "BISECT_HEAD", &oid, NULL, 0,
 			       UPDATE_REFS_MSG_ON_ERR)) {
-			retval = -1;
+			res = -1;
 			goto finish;
 		}
 	}

@@ -586,26 +586,26 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 	for (i = 0; i < states.nr; i++)
 		if (bisect_write(states.items[i].string,
 				 revs.items[i].string, terms, 1)) {
-			retval = -1;
+			res = -1;
 			goto finish;
 		}
 
 	if (must_write_terms && write_terms(terms->term_bad,
 					    terms->term_good)) {
-		retval = -1;
+		res = -1;
 		goto finish;
 	}
 
-	retval = bisect_append_log_quoted(argv);
-	if (retval)
-		retval = -1;
+	res = bisect_append_log_quoted(argv);
+	if (res)
+		res = -1;
 
 finish:
 	string_list_clear(&revs, 0);
 	string_list_clear(&states, 0);
 	strbuf_release(&start_head);
 	strbuf_release(&bisect_names);
-	return retval;
+	return res;
 }
 
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)

index 5093e55273..f441ea85ff 100644
@@ -282,35 +282,23 @@ static int mark_good(const char *refname, const struct object_id *oid,
 	return 1;
 }
 
-static const char *need_bad_and_good_revision_warning =
+static const char need_bad_and_good_revision_warning[] =
 	N_("You need to give me at least one %s and %s revision.\n"
 	   "You can use \"git bisect %s\" and \"git bisect %s\" for that.");
 
-static const char *need_bisect_start_warning =
+static const char need_bisect_start_warning[] =
 	N_("You need to start by \"git bisect start\".\n"
 	   "You then need to give me at least one %s and %s revision.\n"
 	   "You can use \"git bisect %s\" and \"git bisect %s\" for that.");
 
-static int bisect_next_check(const struct bisect_terms *terms,
-			     const char *current_term)
+static int decide_next(const struct bisect_terms *terms,
+		       const char *current_term, int missing_good,
+		       int missing_bad)
 {
-	int missing_good = 1, missing_bad = 1, res = 0;
-	const char *bad_ref = xstrfmt("refs/bisect/%s", terms->term_bad);
-	const char *good_glob = xstrfmt("%s-*", terms->term_good);
-
-	if (ref_exists(bad_ref))
-		missing_bad = 0;
-
-	for_each_glob_ref_in(mark_good, good_glob, "refs/bisect/",
-			     (void *) &missing_good);
-
 	if (!missing_good && !missing_bad)
-		goto finish;
-
-	if (!current_term) {
-		res = -1;
-		goto finish;
-	}
+		return 0;
+	if (!current_term)
+		return -1;
 
 	if (missing_good && !missing_bad &&
 	    !strcmp(current_term, terms->term_good)) {

@@ -321,7 +309,7 @@ static int bisect_next_check(const struct bisect_terms *terms,
 		 */
 		warning(_("bisecting only with a %s commit"), terms->term_bad);
 		if (!isatty(0))
-			goto finish;
+			return 0;
 		/*
 		 * TRANSLATORS: Make sure to include [Y] and [n] in your
 		 * translation. The program will only accept English input

@@ -329,21 +317,35 @@ static int bisect_next_check(const struct bisect_terms *terms,
 		 */
 		yesno = git_prompt(_("Are you sure [Y/n]? "), PROMPT_ECHO);
 		if (starts_with(yesno, "N") || starts_with(yesno, "n"))
-			res = -1;
-		goto finish;
-	}
-	if (!is_empty_or_missing_file(git_path_bisect_start())) {
-		res = error(_(need_bad_and_good_revision_warning),
-			       vocab_bad, vocab_good, vocab_bad, vocab_good);
-	} else {
-		res = error(_(need_bisect_start_warning),
-			       vocab_good, vocab_bad, vocab_good, vocab_bad);
+			return -1;
+		return 0;
 	}
 
-finish:
+	if (!is_empty_or_missing_file(git_path_bisect_start()))
+		return error(_(need_bad_and_good_revision_warning),
+			     vocab_bad, vocab_good, vocab_bad, vocab_good);
+	else
+		return error(_(need_bisect_start_warning),
+			     vocab_good, vocab_bad, vocab_good, vocab_bad);
+}
+
+static int bisect_next_check(const struct bisect_terms *terms,
+			     const char *current_term)
+{
+	int missing_good = 1, missing_bad = 1;
+	const char *bad_ref = xstrfmt("refs/bisect/%s", terms->term_bad);
+	const char *good_glob = xstrfmt("%s-*", terms->term_good);
+
+	if (ref_exists(bad_ref))
+		missing_bad = 0;
+
+	for_each_glob_ref_in(mark_good, good_glob, "refs/bisect/",
+			     (void *) &missing_good);
+
 	free((void *) good_glob);
 	free((void *) bad_ref);
-	return res;
+
+	return decide_next(terms, current_term, missing_good, missing_bad);
 }
 
 static int get_terms(struct bisect_terms *terms)

index 487675c672..bb926f09d0 100644
@@ -659,11 +659,11 @@ static void bisect_common(struct rev_info *revs)
 		mark_edges_uninteresting(revs, NULL);
 }
 
-static void exit_if_skipped_commits(struct commit_list *tried,
+static int error_if_skipped_commits(struct commit_list *tried,
 				    const struct object_id *bad)
 {
 	if (!tried)
-		return;
+		return 0;
 
 	printf("There are only 'skip'ped commits left to test.\n"
 	       "The first %s commit could be any of:\n", term_bad);

@@ -674,7 +674,13 @@ static void exit_if_skipped_commits(struct commit_list *tried,
 	if (bad)
 		printf("%s\n", oid_to_hex(bad));
 	printf(_("We cannot bisect more!\n"));
-	exit(2);
+
+	/*
+	 * We don't want to clean the bisection state
+	 * as we need to get back to where we started
+	 * by using `git bisect reset`.
+	 */
+	return -2;
 }
 
 static int is_expected_rev(const struct object_id *oid)

@@ -949,7 +955,7 @@ int bisect_next_all(const char *prefix, int no_checkout)
 {
 	struct rev_info revs;
 	struct commit_list *tried;
-	int reaches = 0, all = 0, nr, steps;
+	int reaches = 0, all = 0, nr, steps, res;
 	struct object_id *bisect_rev;
 	char *steps_msg;
 

@@ -972,8 +978,9 @@ int bisect_next_all(const char *prefix, int no_checkout)
 		 * We should exit here only if the "bad"
 		 * commit is also a "skip" commit.
 		 */
-		exit_if_skipped_commits(tried, NULL);
-
+		res = error_if_skipped_commits(tried, NULL);
+		if (res)
+			exit(-res);
 		printf(_("%s was both %s and %s\n"),
 		       oid_to_hex(current_bad_oid),
 		       term_good,

@@ -990,7 +997,9 @@ int bisect_next_all(const char *prefix, int no_checkout)
 	bisect_rev = &revs.commits->item->object.oid;
 
 	if (oideq(bisect_rev, current_bad_oid)) {
-		exit_if_skipped_commits(tried, current_bad_oid);
+		res = error_if_skipped_commits(tried, current_bad_oid);
+		if (res)
+			exit(-res);
 		printf("%s is the first %s commit\n", oid_to_hex(bisect_rev),
 			term_bad);
 		show_diff_tree(prefix, revs.commits->item);

index bb926f09d0..1f2f3201a3 100644
@@ -710,7 +710,7 @@ static int is_expected_rev(const struct object_id *oid)
 static int bisect_checkout(const struct object_id *bisect_rev, int no_checkout)
 {
 	char bisect_rev_hex[GIT_MAX_HEXSZ + 1];
-
+	int res = 0;
 	memcpy(bisect_rev_hex, oid_to_hex(bisect_rev), GIT_SHA1_HEXSZ + 1);
 	update_ref(NULL, "BISECT_EXPECTED_REV", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR);
 

@@ -719,14 +719,14 @@ static int bisect_checkout(const struct object_id *bisect_rev, int no_checkout)
 		update_ref(NULL, "BISECT_HEAD", bisect_rev, NULL, 0,
 			   UPDATE_REFS_DIE_ON_ERR);
 	} else {
-		int res;
 		res = run_command_v_opt(argv_checkout, RUN_GIT_CMD);
 		if (res)
-			exit(res);
+			return res > 0 ? -res : res;
 	}
 
 	argv_show_branch[1] = bisect_rev_hex;
-	return run_command_v_opt(argv_show_branch, RUN_GIT_CMD);
+	res = run_command_v_opt(argv_show_branch, RUN_GIT_CMD);
+	return res > 0 ? -res : res;
 }
 
 static struct commit *get_commit_reference(const struct object_id *oid)

@@ -822,7 +822,7 @@ static void check_merge_bases(int rev_nr, struct commit **rev, int no_checkout)
 			handle_skipped_merge_base(mb);
 		} else {
 			printf(_("Bisecting: a merge base must be tested\n"));
-			exit(bisect_checkout(mb, no_checkout));
+			exit(-bisect_checkout(mb, no_checkout));
 		}
 	}
 

index 1f2f3201a3..1134854fe2 100644
@@ -801,13 +801,16 @@ static void handle_skipped_merge_base(const struct object_id *mb)
  * "check_merge_bases" checks that merge bases are not "bad" (or "new").
  *
  * - If one is "bad" (or "new"), it means the user assumed something wrong
- * and we must exit with a non 0 error code.
+ * and we must return error with a non 0 error code.
  * - If one is "good" (or "old"), that's good, we have nothing to do.
  * - If one is "skipped", we can't know but we should warn.
  * - If we don't know, we should check it out and ask the user to test.
+ * - If a merge base must be tested, on success return -11 a special condition
+ * for early success, this will be converted back to 0 in cmd_bisect__helper.
  */
-static void check_merge_bases(int rev_nr, struct commit **rev, int no_checkout)
+static int check_merge_bases(int rev_nr, struct commit **rev, int no_checkout)
 {
+	int res = 0;
 	struct commit_list *result;
 
 	result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1);

@@ -822,11 +825,16 @@ static void check_merge_bases(int rev_nr, struct commit **rev, int no_checkout)
 			handle_skipped_merge_base(mb);
 		} else {
 			printf(_("Bisecting: a merge base must be tested\n"));
-			exit(-bisect_checkout(mb, no_checkout));
+			res = bisect_checkout(mb, no_checkout);
+			if (!res)
+				/* indicate early success */
+				res = -11;
+			break;
 		}
 	}
 
 	free_commit_list(result);
+	return res;
 }
 
 static int check_ancestors(int rev_nr, struct commit **rev, const char *prefix)

@@ -857,7 +865,7 @@ static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
 {
 	char *filename = git_pathdup("BISECT_ANCESTORS_OK");
 	struct stat st;
-	int fd, rev_nr;
+	int fd, rev_nr, res = 0;
 	struct commit **rev;
 
 	if (!current_bad_oid)

@@ -874,8 +882,10 @@ static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
 	/* Check if all good revs are ancestor of the bad rev. */
 	rev = get_bad_and_good_commits(&rev_nr);
 	if (check_ancestors(rev_nr, rev, prefix))
-		check_merge_bases(rev_nr, rev, no_checkout);
+		res = check_merge_bases(rev_nr, rev, no_checkout);
 	free(rev);
+	if(res)
+		exit(res == -11 ? 0 : -res);
 
 	/* Create file BISECT_ANCESTORS_OK. */
 	fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600);

index 1134854fe2..87db1cc4be 100644
@@ -859,17 +859,24 @@ static int check_ancestors(int rev_nr, struct commit **rev, const char *prefix)
  *
  * If that's not the case, we need to check the merge bases.
  * If a merge base must be tested by the user, its source code will be
- * checked out to be tested by the user and we will exit.
+ * checked out to be tested by the user and we will return.
  */
-static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
+static int check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
 {
 	char *filename = git_pathdup("BISECT_ANCESTORS_OK");
 	struct stat st;
 	int fd, rev_nr, res = 0;
 	struct commit **rev;
 
-	if (!current_bad_oid)
-		die(_("a %s revision is needed"), term_bad);
+	/*
+	 * We don't want to clean the bisection state
+	 * as we need to get back to where we started
+	 * by using `git bisect reset`.
+	 */
+	if (!current_bad_oid) {
+		res = error(_("a %s revision is needed"), term_bad);
+		goto done;
+	}
 
 	/* Check if file BISECT_ANCESTORS_OK exists. */
 	if (!stat(filename, &st) && S_ISREG(st.st_mode))

@@ -884,18 +891,20 @@ static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
 	if (check_ancestors(rev_nr, rev, prefix))
 		res = check_merge_bases(rev_nr, rev, no_checkout);
 	free(rev);
-	if(res)
-		exit(res == -11 ? 0 : -res);
-
-	/* Create file BISECT_ANCESTORS_OK. */
-	fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600);
-	if (fd < 0)
-		warning_errno(_("could not create file '%s'"),
-			      filename);
-	else
-		close(fd);
+	
+	if (!res)
+	{
+		/* Create file BISECT_ANCESTORS_OK. */
+		fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600);
+		if (fd < 0)
+			warning_errno(_("could not create file '%s'"),
+				      filename);
+		else
+			close(fd);
+	}
  done:
 	free(filename);
+	return res;
 }
 
 /*

@@ -973,7 +982,9 @@ int bisect_next_all(const char *prefix, int no_checkout)
 	if (read_bisect_refs())
 		die(_("reading bisect refs failed"));
 
-	check_good_are_ancestors_of_bad(prefix, no_checkout);
+	res = check_good_are_ancestors_of_bad(prefix, no_checkout);
+	if (res)
+		return res;
 
 	bisect_rev_setup(&revs, prefix, "%s", "^%s", 1);
 	revs.limited = 1;

index f441ea85ff..ffb5dbe4b3 100644
@@ -663,7 +663,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 
 	switch (cmdmode) {
 	case NEXT_ALL:
-		return bisect_next_all(prefix, no_checkout);
+		res = bisect_next_all(prefix, no_checkout);
+		break;
 	case WRITE_TERMS:
 		if (argc != 2)
 			return error(_("--write-terms requires two arguments"));

@@ -710,5 +711,12 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		return error("BUG: unknown subcommand '%d'", cmdmode);
 	}
 	free_terms(&terms);
-	return !!res;
+	/* 
+	 * Handle early success
+	 * From check_merge_bases > check_good_are_ancestors_of_bad > bisect_next_all
+	 */
+	if (res == -11)
+		res = 0;
+
+	return res < 0 ? -res : res;
 }

index 87db1cc4be..b1ea658a75 100644
@@ -751,7 +751,7 @@ static struct commit **get_bad_and_good_commits(int *rev_nr)
 	return rev;
 }
 
-static void handle_bad_merge_base(void)
+static int handle_bad_merge_base(void)
 {
 	if (is_expected_rev(current_bad_oid)) {
 		char *bad_hex = oid_to_hex(current_bad_oid);

@@ -772,14 +772,14 @@ static void handle_bad_merge_base(void)
 				"between %s and [%s].\n"),
 				bad_hex, term_bad, term_good, bad_hex, good_hex);
 		}
-		exit(3);
+		return -3;
 	}
 
 	fprintf(stderr, _("Some %s revs are not ancestors of the %s rev.\n"
 		"git bisect cannot work properly in this case.\n"
 		"Maybe you mistook %s and %s revs?\n"),
 		term_good, term_bad, term_good, term_bad);
-	exit(1);
+	return -1;
 }
 
 static void handle_skipped_merge_base(const struct object_id *mb)

@@ -818,7 +818,8 @@ static int check_merge_bases(int rev_nr, struct commit **rev, int no_checkout)
 	for (; result; result = result->next) {
 		const struct object_id *mb = &result->item->object.oid;
 		if (oideq(mb, current_bad_oid)) {
-			handle_bad_merge_base();
+			res = handle_bad_merge_base();
+			break;
 		} else if (0 <= oid_array_lookup(&good_revs, mb)) {
 			continue;
 		} else if (0 <= oid_array_lookup(&skipped_revs, mb)) {

index b1ea658a75..3d11a8eac7 100644
@@ -964,10 +964,12 @@ void read_bisect_terms(const char **read_bad, const char **read_good)
 }
 
 /*
- * We use the convention that exiting with an exit code 10 means that
- * the bisection process finished successfully.
- * In this case the calling shell script should exit 0.
- *
+ * We use the convention that return -10 means the bisection process
+ * finished successfully.
+ * In this case the calling function or command should not turn a -10 
+ * return code into an error or a non zero exit code.
+ * This returned -10 is converted to 10 at the end of cmd_bisect__helper().
+ * 
  * If no_checkout is non-zero, the bisection process does not
  * checkout the trial commit but instead simply updates BISECT_HEAD.
  */

@@ -997,23 +999,35 @@ int bisect_next_all(const char *prefix, int no_checkout)
 
 	if (!revs.commits) {
 		/*
-		 * We should exit here only if the "bad"
+		 * We should return error here only if the "bad"
 		 * commit is also a "skip" commit.
 		 */
 		res = error_if_skipped_commits(tried, NULL);
 		if (res)
-			exit(-res);
+			return res;
 		printf(_("%s was both %s and %s\n"),
 		       oid_to_hex(current_bad_oid),
 		       term_good,
 		       term_bad);
-		exit(1);
+
+		/*
+		 * We don't want to clean the bisection state
+		 * as we need to get back to where we started
+		 * by using `git bisect reset`.
+		 */
+		return -1;
 	}
 
 	if (!all) {
 		fprintf(stderr, _("No testable commit found.\n"
 			"Maybe you started with bad path parameters?\n"));
-		exit(4);
+
+		/*
+		 * We don't want to clean the bisection state
+		 * as we need to get back to where we started
+		 * by using `git bisect reset`.
+		 */
+		return -4;
 	}
 
 	bisect_rev = &revs.commits->item->object.oid;

@@ -1021,12 +1035,17 @@ int bisect_next_all(const char *prefix, int no_checkout)
 	if (oideq(bisect_rev, current_bad_oid)) {
 		res = error_if_skipped_commits(tried, current_bad_oid);
 		if (res)
-			exit(-res);
+			return res;
 		printf("%s is the first %s commit\n", oid_to_hex(bisect_rev),
 			term_bad);
 		show_diff_tree(prefix, revs.commits->item);
-		/* This means the bisection process succeeded. */
-		exit(10);
+		/* 
+		 * This means the bisection process succeeded.
+		 * Using -10 so that the call chain can simply check 
+		 * for negative return values for early returns up 
+		 * until the cmd_bisect__helper() caller.
+		 */
+		return -10;
 	}
 
 	nr = all - reaches - 1;

index 3d11a8eac7..78ac4de395 100644
@@ -633,6 +633,12 @@ static void bisect_rev_setup(struct rev_info *revs, const char *prefix,
 	struct argv_array rev_argv = ARGV_ARRAY_INIT;
 	int i;
 
+	/*
+	 * Since the code is slowly being converted to C, there might be
+	 * instances where the revisions were initialized before. Thus
+	 * we first need to reset it.
+	 */
+	reset_revision_walk();
 	repo_init_revisions(the_repository, revs, prefix);
 	revs->abbrev = 0;
 	revs->commit_format = CMIT_FMT_UNSPECIFIED;

192 lines not on this page · raw message

index 2f19924471..d538cb04fb 100644
@@ -697,9 +697,9 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 		return -1;
 
 	/*
-	 * In case of mistaken revs or checkout error, or signals received,
+	 * In case of mistaken revs or checkout error,
 	 * "bisect_auto_next" below may exit or misbehave.
-	 * We have to trap this to be able to clean up using
+	 * We have to handle this to be able to clean up using
 	 * "bisect_clean_state".
 	 */
 

@@ -743,6 +743,31 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 	string_list_clear(&states, 0);
 	strbuf_release(&start_head);
 	strbuf_release(&bisect_names);
+	if (res)
+		return res;
+
+	res = bisect_auto_next(terms, NULL);
+	/*
+	 * In case of mistaken revs or checkout error, or signals received,
+	 * "bisect_auto_next" below may exit or misbehave.
+	 * We have to trap this to be able to clean up using
+	 * "bisect_clean_state".
+	 * return code -11 is special code that indicates special success.
+	 *	-> bisect_start()
+	 *	   . res = bisect_auto_next()
+	 *	    -> bisect_auto_next()
+	 *	       . return bisect_next()
+	 *	       -> bisect_next()
+	 *		  . res = bisect_next_all()
+	 *		  -> bisect_next_all()
+	 *		     . res = check_good_are_ancestors_of_bad()
+	 *		     -> check_good_are_ancestors_of_bad()
+	 *			. res = check_merge_bases()
+	 *			-> check_merge_bases()
+	 *			   . res = -11
+	 */
+	if (res && res != -11)
+		bisect_clean_state();
 	return res;
 }
 

index d538cb04fb..b9f2138811 100644
@@ -557,6 +557,11 @@ static int bisect_auto_next(struct bisect_terms *terms, const char *prefix)
 	return 0;
 }
 
+static inline char *dequote_arg(const char *arg)
+{
+	return arg[0] != '\'' ? xstrdup(arg) : sq_dequote(xstrdup(arg));
+}
+
 static int bisect_start(struct bisect_terms *terms, int no_checkout,
 			const char **argv, int argc)
 {

@@ -577,15 +582,22 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 	 * Check for one bad and then some good revisions
 	 */
 	for (i = 0; i < argc; i++) {
-		if (!strcmp(argv[i], "--")) {
+		char *arg = dequote_arg(argv[i]);
+
+		if (!strcmp(arg, "--")) {
 			has_double_dash = 1;
+			free(arg);
 			break;
 		}
+		free(arg);
 	}
 
 	for (i = 0; i < argc; i++) {
-		const char *arg = argv[i];
-		if (!strcmp(argv[i], "--")) {
+		char *dequoted = dequote_arg(argv[i]);
+		const char *arg = dequoted;
+
+		if (!strcmp(arg, "--")) {
+			free(dequoted);
 			break;
 		} else if (!strcmp(arg, "--no-checkout")) {
 			no_checkout = 1;

@@ -593,7 +605,7 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 			 !strcmp(arg, "--term-old")) {
 			must_write_terms = 1;
 			free((void *) terms->term_good);
-			terms->term_good = xstrdup(argv[++i]);
+			terms->term_good = dequote_arg(argv[++i]);
 		} else if (skip_prefix(arg, "--term-good=", &arg) ||
 			   skip_prefix(arg, "--term-old=", &arg)) {
 			must_write_terms = 1;

@@ -603,24 +615,31 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 			 !strcmp(arg, "--term-new")) {
 			must_write_terms = 1;
 			free((void *) terms->term_bad);
-			terms->term_bad = xstrdup(argv[++i]);
+			terms->term_bad = dequote_arg(argv[++i]);
 		} else if (skip_prefix(arg, "--term-bad=", &arg) ||
 			   skip_prefix(arg, "--term-new=", &arg)) {
 			must_write_terms = 1;
 			free((void *) terms->term_bad);
 			terms->term_bad = xstrdup(arg);
 		} else if (starts_with(arg, "--") &&
-			 !one_of(arg, "--term-good", "--term-bad", NULL)) {
-			return error(_("unrecognized option: '%s'"), arg);
+			   !one_of(arg, "--term-good", "--term-bad", NULL)) {
+			error(_("unrecognized option: '%s'"), arg);
+			free(dequoted);
+			return -1;
 		} else {
 			char *commit_id = xstrfmt("%s^{commit}", arg);
-			if (get_oid(commit_id, &oid) && has_double_dash)
-				die(_("'%s' does not appear to be a valid "
-				      "revision"), arg);
+			if (get_oid(commit_id, &oid) && has_double_dash) {
+				error(_("'%s' does not appear to be a valid "
+					"revision"), arg);
+				free(commit_id);
+				free(dequoted);
+				return -1;
+			}
 
 			string_list_append(&revs, oid_to_hex(&oid));
 			free(commit_id);
 		}
+		free(dequoted);
 	}
 	pathspec_pos = i;
 

index b9f2138811..b4f84b3041 100644
@@ -22,7 +22,6 @@ static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES")
 static const char * const git_bisect_helper_usage[] = {
 	N_("git bisect--helper --next-all [--no-checkout]"),
 	N_("git bisect--helper --write-terms <bad_term> <good_term>"),
-	N_("git bisect--helper --bisect-clean-state"),
 	N_("git bisect--helper --bisect-reset [<commit>]"),
 	N_("git bisect--helper --bisect-write [--no-log] <state> <revision> <good_term> <bad_term>"),
 	N_("git bisect--helper --bisect-check-and-set-terms <command> <good_term> <bad_term>"),

@@ -795,7 +794,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 	enum {
 		NEXT_ALL = 1,
 		WRITE_TERMS,
-		BISECT_CLEAN_STATE,
 		CHECK_EXPECTED_REVS,
 		BISECT_RESET,
 		BISECT_WRITE,

@@ -812,8 +810,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			 N_("perform 'git bisect next'"), NEXT_ALL),
 		OPT_CMDMODE(0, "write-terms", &cmdmode,
 			 N_("write the terms to .git/BISECT_TERMS"), WRITE_TERMS),
-		OPT_CMDMODE(0, "bisect-clean-state", &cmdmode,
-			 N_("cleanup the bisection state"), BISECT_CLEAN_STATE),
 		OPT_CMDMODE(0, "check-expected-revs", &cmdmode,
 			 N_("check for expected revs"), CHECK_EXPECTED_REVS),
 		OPT_CMDMODE(0, "bisect-reset", &cmdmode,

@@ -855,10 +851,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		if (argc != 2)
 			return error(_("--write-terms requires two arguments"));
 		return write_terms(argv[0], argv[1]);
-	case BISECT_CLEAN_STATE:
-		if (argc != 0)
-			return error(_("--bisect-clean-state requires no arguments"));
-		return bisect_clean_state();
 	case CHECK_EXPECTED_REVS:
 		check_expected_revs(argv, argc);
 		return 0;

index b4f84b3041..1a525faf27 100644
@@ -20,7 +20,6 @@ static GIT_PATH_FUNC(git_path_head_name, "head-name")
 static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES")
 
 static const char * const git_bisect_helper_usage[] = {
-	N_("git bisect--helper --next-all [--no-checkout]"),
 	N_("git bisect--helper --write-terms <bad_term> <good_term>"),
 	N_("git bisect--helper --bisect-reset [<commit>]"),
 	N_("git bisect--helper --bisect-write [--no-log] <state> <revision> <good_term> <bad_term>"),

@@ -792,8 +791,7 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {
-		NEXT_ALL = 1,
-		WRITE_TERMS,
+		WRITE_TERMS = 1,
 		CHECK_EXPECTED_REVS,
 		BISECT_RESET,
 		BISECT_WRITE,

@@ -806,8 +804,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 	} cmdmode = 0;
 	int no_checkout = 0, res = 0, nolog = 0;
 	struct option options[] = {
-		OPT_CMDMODE(0, "next-all", &cmdmode,
-			 N_("perform 'git bisect next'"), NEXT_ALL),
 		OPT_CMDMODE(0, "write-terms", &cmdmode,
 			 N_("write the terms to .git/BISECT_TERMS"), WRITE_TERMS),
 		OPT_CMDMODE(0, "check-expected-revs", &cmdmode,

@@ -844,9 +840,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		usage_with_options(git_bisect_helper_usage, options);
 
 	switch (cmdmode) {
-	case NEXT_ALL:
-		res = bisect_next_all(prefix, no_checkout);
-		break;
 	case WRITE_TERMS:
 		if (argc != 2)
 			return error(_("--write-terms requires two arguments"));

index 1a525faf27..61c3cc517a 100644
@@ -30,6 +30,7 @@ static const char * const git_bisect_helper_usage[] = {
 					     "[--no-checkout] [<bad> [<good>...]] [--] [<paths>...]"),
 	N_("git bisect--helper --bisect-next"),
 	N_("git bisect--helper --bisect-auto-next"),
+	N_("git bisect--helper --bisect-autostart"),
 	NULL
 };
 

@@ -56,6 +57,8 @@ static void set_terms(struct bisect_terms *terms, const char *bad,
 static const char *vocab_bad = "bad|new";
 static const char *vocab_good = "good|old";
 
+static int bisect_autostart(struct bisect_terms *terms);
+
 /*
  * Check whether the string `term` belongs to the set of strings
  * included in the variable arguments.

@@ -530,6 +533,7 @@ static int bisect_next(struct bisect_terms *terms, const char *prefix)
 {
 	int res, no_checkout;
 
+	bisect_autostart(terms);
 	if (bisect_next_check(terms, terms->term_good))
 		return -1;
 

@@ -788,6 +792,32 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 	return res;
 }
 
+static int bisect_autostart(struct bisect_terms *terms)
+{
+	if (is_empty_or_missing_file(git_path_bisect_start())) {
+		const char *yesno;
+		const char *argv[] = {NULL};
+		fprintf(stderr, _("You need to start by \"git bisect "
+				  "start\"\n"));
+
+		if (!isatty(STDIN_FILENO))
+			return 1;
+
+		/*
+		 * TRANSLATORS: Make sure to include [Y] and [n] in your
+		 * translation. The program will only accept English input
+		 * at this point.
+		 */
+		yesno = git_prompt(_("Do you want me to do it for you "
+				     "[Y/n]? "), PROMPT_ECHO);
+		if (starts_with(yesno, _("n")) || starts_with(yesno, _("N")))
+			return 1;
+
+		return bisect_start(terms, 0, argv, 0);
+	}
+	return 0;
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {

@@ -801,6 +831,7 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		BISECT_START,
 		BISECT_NEXT,
 		BISECT_AUTO_NEXT,
+		BISECT_AUTOSTART,
 	} cmdmode = 0;
 	int no_checkout = 0, res = 0, nolog = 0;
 	struct option options[] = {

@@ -824,6 +855,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			 N_("find the next bisection commit"), BISECT_NEXT),
 		OPT_CMDMODE(0, "bisect-auto-next", &cmdmode,
 			 N_("verify the next bisection state then checkout the next bisection commit"), BISECT_AUTO_NEXT),
+		OPT_CMDMODE(0, "bisect-autostart", &cmdmode,
+			 N_("start the bisection if BISECT_START is empty or missing"), BISECT_AUTOSTART),
 		OPT_BOOL(0, "no-checkout", &no_checkout,
 			 N_("update BISECT_HEAD instead of checking out the current commit")),
 		OPT_BOOL(0, "no-log", &nolog,

@@ -890,6 +923,12 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		get_terms(&terms);
 		res = bisect_auto_next(&terms, prefix);
 		break;
+	case BISECT_AUTOSTART:
+		if (argc)
+			return error(_("--bisect-autostart requires 0 arguments"));
+		set_terms(&terms, "bad", "good");
+		res = bisect_autostart(&terms);
+		break;
 	default:
 		return error("BUG: unknown subcommand '%d'", cmdmode);
 	}

index 61c3cc517a..49ef0ff6bc 100644
@@ -31,6 +31,8 @@ static const char * const git_bisect_helper_usage[] = {
 	N_("git bisect--helper --bisect-next"),
 	N_("git bisect--helper --bisect-auto-next"),
 	N_("git bisect--helper --bisect-autostart"),
+	N_("git bisect--helper --bisect-state (bad|new) [<rev>]"),
+	N_("git bisect--helper --bisect-state (good|old) [<rev>...]"),
 	NULL
 };
 

@@ -818,6 +820,74 @@ static int bisect_autostart(struct bisect_terms *terms)
 	return 0;
 }
 
+static char *bisect_head(void)
+{
+	if (is_empty_or_missing_file(git_path_bisect_head()))
+		return "HEAD";
+	else
+		return "BISECT_HEAD";
+}
+
+static int bisect_state(struct bisect_terms *terms, const char **argv,
+			int argc)
+{
+	const char *state = argv[0];
+
+	if (check_and_set_terms(terms, state))
+		return -1;
+
+	if (!argc)
+		return error(_("Please call `--bisect-state` with at least one argument"));
+
+	if (argc == 1 && one_of(state, terms->term_good,
+	    terms->term_bad, "skip", NULL)) {
+		const char *bisected_head = xstrdup(bisect_head());
+		const char *hex[1];
+		struct object_id oid;
+
+		if (get_oid(bisected_head, &oid))
+			return error(_("Bad rev input: %s"), bisected_head);
+		if (bisect_write(state, oid_to_hex(&oid), terms, 0))
+			return -1;
+
+		*hex = xstrdup(oid_to_hex(&oid));
+		check_expected_revs(hex, 1);
+		return bisect_auto_next(terms, NULL);
+	}
+
+	if ((argc == 2 && !strcmp(state, terms->term_bad)) ||
+			one_of(state, terms->term_good, "skip", NULL)) {
+		int i;
+		struct string_list hex = STRING_LIST_INIT_DUP;
+
+		for (i = 1; i < argc; i++) {
+			struct object_id oid;
+
+			if (get_oid(argv[i], &oid)) {
+				string_list_clear(&hex, 0);
+				return error(_("Bad rev input: %s"), argv[i]);
+			}
+			string_list_append(&hex, oid_to_hex(&oid));
+		}
+		for (i = 0; i < hex.nr; i++) {
+			const char **hex_string = (const char **) &hex.items[i].string;
+			if (bisect_write(state, *hex_string, terms, 0)) {
+				string_list_clear(&hex, 0);
+				return -1;
+			}
+			check_expected_revs(hex_string, 1);
+		}
+		string_list_clear(&hex, 0);
+		return bisect_auto_next(terms, NULL);
+	}
+
+	if (!strcmp(state, terms->term_bad))
+		return error(_("'git bisect %s' can take only one argument."),
+		      terms->term_bad);
+
+	return -1;
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {

@@ -832,6 +902,7 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		BISECT_NEXT,
 		BISECT_AUTO_NEXT,
 		BISECT_AUTOSTART,
+		BISECT_STATE
 	} cmdmode = 0;
 	int no_checkout = 0, res = 0, nolog = 0;
 	struct option options[] = {

@@ -857,6 +928,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			 N_("verify the next bisection state then checkout the next bisection commit"), BISECT_AUTO_NEXT),
 		OPT_CMDMODE(0, "bisect-autostart", &cmdmode,
 			 N_("start the bisection if BISECT_START is empty or missing"), BISECT_AUTOSTART),
+		OPT_CMDMODE(0, "bisect-state", &cmdmode,
+			 N_("mark the state of ref (or refs)"), BISECT_STATE),
 		OPT_BOOL(0, "no-checkout", &no_checkout,
 			 N_("update BISECT_HEAD instead of checking out the current commit")),
 		OPT_BOOL(0, "no-log", &nolog,

@@ -929,6 +1002,13 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		set_terms(&terms, "bad", "good");
 		res = bisect_autostart(&terms);
 		break;
+	case BISECT_STATE:
+		if (argc == 0)
+			return error(_("--bisect-state requires at least one revision"));
+		set_terms(&terms, "bad", "good");
+		get_terms(&terms);
+		res = bisect_state(&terms, argv, argc);
+		break;
 	default:
 		return error("BUG: unknown subcommand '%d'", cmdmode);
 	}

index 49ef0ff6bc..9cc11450f4 100644
@@ -892,7 +892,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {
 		WRITE_TERMS = 1,
-		CHECK_EXPECTED_REVS,
 		BISECT_RESET,
 		BISECT_WRITE,
 		CHECK_AND_SET_TERMS,

@@ -908,8 +907,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 	struct option options[] = {
 		OPT_CMDMODE(0, "write-terms", &cmdmode,
 			 N_("write the terms to .git/BISECT_TERMS"), WRITE_TERMS),
-		OPT_CMDMODE(0, "check-expected-revs", &cmdmode,
-			 N_("check for expected revs"), CHECK_EXPECTED_REVS),
 		OPT_CMDMODE(0, "bisect-reset", &cmdmode,
 			 N_("reset the bisection state"), BISECT_RESET),
 		OPT_CMDMODE(0, "bisect-write", &cmdmode,

@@ -950,9 +947,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		if (argc != 2)
 			return error(_("--write-terms requires two arguments"));
 		return write_terms(argv[0], argv[1]);
-	case CHECK_EXPECTED_REVS:
-		check_expected_revs(argv, argc);
-		return 0;
 	case BISECT_RESET:
 		if (argc > 1)
 			return error(_("--bisect-reset requires either no argument or a commit"));

index 9cc11450f4..d6308cabd2 100644
@@ -20,7 +20,6 @@ static GIT_PATH_FUNC(git_path_head_name, "head-name")
 static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES")
 
 static const char * const git_bisect_helper_usage[] = {
-	N_("git bisect--helper --write-terms <bad_term> <good_term>"),
 	N_("git bisect--helper --bisect-reset [<commit>]"),
 	N_("git bisect--helper --bisect-write [--no-log] <state> <revision> <good_term> <bad_term>"),
 	N_("git bisect--helper --bisect-check-and-set-terms <command> <good_term> <bad_term>"),

@@ -891,8 +890,7 @@ static int bisect_state(struct bisect_terms *terms, const char **argv,
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {
-		WRITE_TERMS = 1,
-		BISECT_RESET,
+		BISECT_RESET = 1,
 		BISECT_WRITE,
 		CHECK_AND_SET_TERMS,
 		BISECT_NEXT_CHECK,

@@ -905,8 +903,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 	} cmdmode = 0;
 	int no_checkout = 0, res = 0, nolog = 0;
 	struct option options[] = {
-		OPT_CMDMODE(0, "write-terms", &cmdmode,
-			 N_("write the terms to .git/BISECT_TERMS"), WRITE_TERMS),
 		OPT_CMDMODE(0, "bisect-reset", &cmdmode,
 			 N_("reset the bisection state"), BISECT_RESET),
 		OPT_CMDMODE(0, "bisect-write", &cmdmode,

@@ -943,10 +939,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		usage_with_options(git_bisect_helper_usage, options);
 
 	switch (cmdmode) {
-	case WRITE_TERMS:
-		if (argc != 2)
-			return error(_("--write-terms requires two arguments"));
-		return write_terms(argv[0], argv[1]);
 	case BISECT_RESET:
 		if (argc > 1)
 			return error(_("--bisect-reset requires either no argument or a commit"));

index d6308cabd2..0a482d67cf 100644
@@ -887,6 +887,18 @@ static int bisect_state(struct bisect_terms *terms, const char **argv,
 	return -1;
 }
 
+static int bisect_log(void)
+{
+	int fd, status;
+	fd = open(git_path_bisect_log(), O_RDONLY);
+	if (fd < 0)
+		return -1;
+
+	status = copy_fd(fd, STDOUT_FILENO);
+	close(fd);
+        return status ? -1 : 0;
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {

@@ -899,7 +911,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		BISECT_NEXT,
 		BISECT_AUTO_NEXT,
 		BISECT_AUTOSTART,
-		BISECT_STATE
+		BISECT_STATE,
+		BISECT_LOG
 	} cmdmode = 0;
 	int no_checkout = 0, res = 0, nolog = 0;
 	struct option options[] = {

@@ -923,6 +936,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			 N_("start the bisection if BISECT_START is empty or missing"), BISECT_AUTOSTART),
 		OPT_CMDMODE(0, "bisect-state", &cmdmode,
 			 N_("mark the state of ref (or refs)"), BISECT_STATE),
+		OPT_CMDMODE(0, "bisect-log", &cmdmode,
+			 N_("output the contents of BISECT_LOG"), BISECT_LOG),
 		OPT_BOOL(0, "no-checkout", &no_checkout,
 			 N_("update BISECT_HEAD instead of checking out the current commit")),
 		OPT_BOOL(0, "no-log", &nolog,

@@ -995,6 +1010,11 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		get_terms(&terms);
 		res = bisect_state(&terms, argv, argc);
 		break;
+	case BISECT_LOG:
+		if (argc > 1)
+			return error(_("--bisect-log requires 0 arguments"));
+		res = bisect_log();
+		break;
 	default:
 		return error("BUG: unknown subcommand '%d'", cmdmode);
 	}

index 0a482d67cf..6a1920d3e7 100644
@@ -32,6 +32,7 @@ static const char * const git_bisect_helper_usage[] = {
 	N_("git bisect--helper --bisect-autostart"),
 	N_("git bisect--helper --bisect-state (bad|new) [<rev>]"),
 	N_("git bisect--helper --bisect-state (good|old) [<rev>...]"),
+	N_("git bisect--helper --bisect-replay <filename>"),
 	NULL
 };
 

@@ -899,6 +900,117 @@ static int bisect_log(void)
         return status ? -1 : 0;
 }
 
+static int get_next_word(const char *line, int pos, struct strbuf *word)
+{
+	int i, len = strlen(line), begin = 0;
+	strbuf_reset(word);
+	for (i = pos; i < len; i++) {
+		if (line[i] == ' ' && begin)
+			return i + 1;
+
+		if (!begin)
+			begin = 1;
+		strbuf_addch(word, line[i]);
+	}
+
+	return i;
+}
+
+static int bisect_replay(struct bisect_terms *terms, const char *filename)
+{
+	struct strbuf line = STRBUF_INIT;
+	struct strbuf word = STRBUF_INIT;
+	FILE *fp = NULL;
+	int res = 0;
+
+	if (is_empty_or_missing_file(filename)) {
+		error(_("cannot read file '%s' for replaying"), filename);
+		res = -1;
+		goto finish;
+	}
+
+	if (bisect_reset(NULL)) {
+		res = -1;
+		goto finish;
+	}
+
+	fp = fopen(filename, "r");
+	if (!fp) {
+		res = -1;
+		goto finish;
+	}
+
+	while (strbuf_getline(&line, fp) != EOF) {
+		int pos = 0;
+		while (pos < line.len) {
+			pos = get_next_word(line.buf, pos, &word);
+
+			if (!strcmp(word.buf, "git")) {
+				continue;
+			} else if (!strcmp(word.buf, "git-bisect")) {
+				continue;
+			} else if (!strcmp(word.buf, "bisect")) {
+				continue;
+			} else if (starts_with(word.buf, "#")) {
+				break;
+			}
+
+			get_terms(terms);
+			if (check_and_set_terms(terms, word.buf)) {
+				res = -1;
+				goto finish;
+			}
+
+			if (!strcmp(word.buf, "start")) {
+				struct argv_array argv = ARGV_ARRAY_INIT;
+				sq_dequote_to_argv_array(line.buf+pos, &argv);
+				if (bisect_start(terms, 0, argv.argv, argv.argc)) {
+					argv_array_clear(&argv);
+					res = -1;
+					goto finish;
+				}
+				argv_array_clear(&argv);
+				break;
+			}
+
+			if (one_of(word.buf, terms->term_good,
+			    terms->term_bad, "skip", NULL)) {
+				if (bisect_write(word.buf, line.buf+pos, terms, 0)) {
+					res = -1;
+					goto finish;
+				}
+				break;
+			}
+
+			if (!strcmp(word.buf, "terms")) {
+				struct argv_array argv = ARGV_ARRAY_INIT;
+				sq_dequote_to_argv_array(line.buf+pos, &argv);
+				if (bisect_terms(terms, argv.argc == 1 ? argv.argv[0] : NULL)) {
+					argv_array_clear(&argv);
+					res = -1;
+					goto finish;
+				}
+				argv_array_clear(&argv);
+				break;
+			}
+
+			error(_("Replay file contains rubbish (\"%s\")"),
+			      word.buf);
+			res = -1;
+			goto finish;
+		}
+	}
+finish:
+	if (fp)
+		fclose(fp);
+	strbuf_release(&line);
+	strbuf_release(&word);
+	if (res)
+		return -1;
+
+	return bisect_auto_next(terms, NULL);
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {

@@ -912,7 +1024,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		BISECT_AUTO_NEXT,
 		BISECT_AUTOSTART,
 		BISECT_STATE,
-		BISECT_LOG
+		BISECT_LOG,
+		BISECT_REPLAY
 	} cmdmode = 0;
 	int no_checkout = 0, res = 0, nolog = 0;
 	struct option options[] = {

@@ -938,6 +1051,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			 N_("mark the state of ref (or refs)"), BISECT_STATE),
 		OPT_CMDMODE(0, "bisect-log", &cmdmode,
 			 N_("output the contents of BISECT_LOG"), BISECT_LOG),
+		OPT_CMDMODE(0, "bisect-replay", &cmdmode,
+			 N_("replay the bisection process from the given file"), BISECT_REPLAY),
 		OPT_BOOL(0, "no-checkout", &no_checkout,
 			 N_("update BISECT_HEAD instead of checking out the current commit")),
 		OPT_BOOL(0, "no-log", &nolog,

@@ -1015,6 +1130,12 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			return error(_("--bisect-log requires 0 arguments"));
 		res = bisect_log();
 		break;
+	case BISECT_REPLAY:
+		if (argc != 1)
+			return error(_("no logfile given"));
+		set_terms(&terms, "bad", "good");
+		res = bisect_replay(&terms, argv[0]);
+		break;
 	default:
 		return error("BUG: unknown subcommand '%d'", cmdmode);
 	}

index 6a1920d3e7..6cd74049e8 100644
@@ -21,7 +21,6 @@ static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES")
 
 static const char * const git_bisect_helper_usage[] = {
 	N_("git bisect--helper --bisect-reset [<commit>]"),
-	N_("git bisect--helper --bisect-write [--no-log] <state> <revision> <good_term> <bad_term>"),
 	N_("git bisect--helper --bisect-check-and-set-terms <command> <good_term> <bad_term>"),
 	N_("git bisect--helper --bisect-next-check <good_term> <bad_term> [<term>]"),
 	N_("git bisect--helper --bisect-terms [--term-good | --term-old | --term-bad | --term-new]"),

@@ -1015,7 +1014,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {
 		BISECT_RESET = 1,
-		BISECT_WRITE,
 		CHECK_AND_SET_TERMS,
 		BISECT_NEXT_CHECK,
 		BISECT_TERMS,

@@ -1031,8 +1029,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 	struct option options[] = {
 		OPT_CMDMODE(0, "bisect-reset", &cmdmode,
 			 N_("reset the bisection state"), BISECT_RESET),
-		OPT_CMDMODE(0, "bisect-write", &cmdmode,
-			 N_("write out the bisection state in BISECT_LOG"), BISECT_WRITE),
 		OPT_CMDMODE(0, "check-and-set-terms", &cmdmode,
 			 N_("check and set terms in a bisection state"), CHECK_AND_SET_TERMS),
 		OPT_CMDMODE(0, "bisect-next-check", &cmdmode,

@@ -1072,12 +1068,7 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 	case BISECT_RESET:
 		if (argc > 1)
 			return error(_("--bisect-reset requires either no argument or a commit"));
-		return !!bisect_reset(argc ? argv[0] : NULL);
-	case BISECT_WRITE:
-		if (argc != 4 && argc != 5)
-			return error(_("--bisect-write requires either 4 or 5 arguments"));
-		set_terms(&terms, argv[3], argv[2]);
-		res = bisect_write(argv[0], argv[1], &terms, nolog);
+		res = bisect_reset(argc ? argv[0] : NULL);
 		break;
 	case CHECK_AND_SET_TERMS:
 		if (argc != 3)

index 6cd74049e8..848401094d 100644
@@ -28,7 +28,6 @@ static const char * const git_bisect_helper_usage[] = {
 					     "[--no-checkout] [<bad> [<good>...]] [--] [<paths>...]"),
 	N_("git bisect--helper --bisect-next"),
 	N_("git bisect--helper --bisect-auto-next"),
-	N_("git bisect--helper --bisect-autostart"),
 	N_("git bisect--helper --bisect-state (bad|new) [<rev>]"),
 	N_("git bisect--helper --bisect-state (good|old) [<rev>...]"),
 	N_("git bisect--helper --bisect-replay <filename>"),

@@ -1020,7 +1019,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		BISECT_START,
 		BISECT_NEXT,
 		BISECT_AUTO_NEXT,
-		BISECT_AUTOSTART,
 		BISECT_STATE,
 		BISECT_LOG,
 		BISECT_REPLAY

@@ -1041,8 +1039,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			 N_("find the next bisection commit"), BISECT_NEXT),
 		OPT_CMDMODE(0, "bisect-auto-next", &cmdmode,
 			 N_("verify the next bisection state then checkout the next bisection commit"), BISECT_AUTO_NEXT),
-		OPT_CMDMODE(0, "bisect-autostart", &cmdmode,
-			 N_("start the bisection if BISECT_START is empty or missing"), BISECT_AUTOSTART),
 		OPT_CMDMODE(0, "bisect-state", &cmdmode,
 			 N_("mark the state of ref (or refs)"), BISECT_STATE),
 		OPT_CMDMODE(0, "bisect-log", &cmdmode,

@@ -1103,12 +1099,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		get_terms(&terms);
 		res = bisect_auto_next(&terms, prefix);
 		break;
-	case BISECT_AUTOSTART:
-		if (argc)
-			return error(_("--bisect-autostart requires 0 arguments"));
-		set_terms(&terms, "bad", "good");
-		res = bisect_autostart(&terms);
-		break;
 	case BISECT_STATE:
 		if (argc == 0)
 			return error(_("--bisect-state requires at least one revision"));

index 848401094d..4b4401005d 100644
@@ -27,7 +27,6 @@ static const char * const git_bisect_helper_usage[] = {
 	N_("git bisect--helper --bisect-start [--term-{old,good}=<term> --term-{new,bad}=<term>]"
 					     "[--no-checkout] [<bad> [<good>...]] [--] [<paths>...]"),
 	N_("git bisect--helper --bisect-next"),
-	N_("git bisect--helper --bisect-auto-next"),
 	N_("git bisect--helper --bisect-state (bad|new) [<rev>]"),
 	N_("git bisect--helper --bisect-state (good|old) [<rev>...]"),
 	N_("git bisect--helper --bisect-replay <filename>"),

@@ -1018,7 +1017,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		BISECT_TERMS,
 		BISECT_START,
 		BISECT_NEXT,
-		BISECT_AUTO_NEXT,
 		BISECT_STATE,
 		BISECT_LOG,
 		BISECT_REPLAY

@@ -1037,8 +1035,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			 N_("start the bisect session"), BISECT_START),
 		OPT_CMDMODE(0, "bisect-next", &cmdmode,
 			 N_("find the next bisection commit"), BISECT_NEXT),
-		OPT_CMDMODE(0, "bisect-auto-next", &cmdmode,
-			 N_("verify the next bisection state then checkout the next bisection commit"), BISECT_AUTO_NEXT),
 		OPT_CMDMODE(0, "bisect-state", &cmdmode,
 			 N_("mark the state of ref (or refs)"), BISECT_STATE),
 		OPT_CMDMODE(0, "bisect-log", &cmdmode,

@@ -1093,12 +1089,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		get_terms(&terms);
 		res = bisect_next(&terms, prefix);
 		break;
-	case BISECT_AUTO_NEXT:
-		if (argc)
-			return error(_("--bisect-auto-next requires 0 arguments"));
-		get_terms(&terms);
-		res = bisect_auto_next(&terms, prefix);
-		break;
 	case BISECT_STATE:
 		if (argc == 0)
 			return error(_("--bisect-state requires at least one revision"));

index 4b4401005d..4eb2580ba8 100644
@@ -558,11 +558,6 @@ static int bisect_auto_next(struct bisect_terms *terms, const char *prefix)
 	return 0;
 }
 
-static inline char *dequote_arg(const char *arg)
-{
-	return arg[0] != '\'' ? xstrdup(arg) : sq_dequote(xstrdup(arg));
-}
-
 static int bisect_start(struct bisect_terms *terms, int no_checkout,
 			const char **argv, int argc)
 {

@@ -583,22 +578,16 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 	 * Check for one bad and then some good revisions
 	 */
 	for (i = 0; i < argc; i++) {
-		char *arg = dequote_arg(argv[i]);
 
-		if (!strcmp(arg, "--")) {
+		if (!strcmp(argv[i], "--")) {
 			has_double_dash = 1;
-			free(arg);
 			break;
 		}
-		free(arg);
 	}
 
 	for (i = 0; i < argc; i++) {
-		char *dequoted = dequote_arg(argv[i]);
-		const char *arg = dequoted;
-
-		if (!strcmp(arg, "--")) {
-			free(dequoted);
+		const char *arg = argv[i];
+		if (!strcmp(argv[i], "--")) {
 			break;
 		} else if (!strcmp(arg, "--no-checkout")) {
 			no_checkout = 1;

@@ -606,7 +595,7 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 			 !strcmp(arg, "--term-old")) {
 			must_write_terms = 1;
 			free((void *) terms->term_good);
-			terms->term_good = dequote_arg(argv[++i]);
+			terms->term_good = xstrdup(argv[++i]);
 		} else if (skip_prefix(arg, "--term-good=", &arg) ||
 			   skip_prefix(arg, "--term-old=", &arg)) {
 			must_write_terms = 1;

@@ -616,7 +605,7 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 			 !strcmp(arg, "--term-new")) {
 			must_write_terms = 1;
 			free((void *) terms->term_bad);
-			terms->term_bad = dequote_arg(argv[++i]);
+			terms->term_bad = xstrdup(argv[++i]);
 		} else if (skip_prefix(arg, "--term-bad=", &arg) ||
 			   skip_prefix(arg, "--term-new=", &arg)) {
 			must_write_terms = 1;

@@ -625,7 +614,6 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 		} else if (starts_with(arg, "--") &&
 			   !one_of(arg, "--term-good", "--term-bad", NULL)) {
 			error(_("unrecognized option: '%s'"), arg);
-			free(dequoted);
 			return -1;
 		} else {
 			char *commit_id = xstrfmt("%s^{commit}", arg);

@@ -633,14 +621,12 @@ static int bisect_start(struct bisect_terms *terms, int no_checkout,
 				error(_("'%s' does not appear to be a valid "
 					"revision"), arg);
 				free(commit_id);
-				free(dequoted);
 				return -1;
 			}
 
 			string_list_append(&revs, oid_to_hex(&oid));
 			free(commit_id);
 		}
-		free(dequoted);
 	}
 	pathspec_pos = i;
 

index 4eb2580ba8..0818dbf8ff 100644
@@ -30,6 +30,7 @@ static const char * const git_bisect_helper_usage[] = {
 	N_("git bisect--helper --bisect-state (bad|new) [<rev>]"),
 	N_("git bisect--helper --bisect-state (good|old) [<rev>...]"),
 	N_("git bisect--helper --bisect-replay <filename>"),
+	N_("git bisect--helper --bisect-skip [(<rev>|<range>)...]"),
 	NULL
 };
 

@@ -994,6 +995,41 @@ static int bisect_replay(struct bisect_terms *terms, const char *filename)
 	return bisect_auto_next(terms, NULL);
 }
 
+static int bisect_skip(struct bisect_terms *terms, const char **argv, int argc)
+{
+	int i, res;
+	const char *pattern = "*..*";
+	struct argv_array argv_state = ARGV_ARRAY_INIT;
+
+	argv_array_push(&argv_state, "skip");
+
+	for (i = 0; i < argc; i++) {
+		if (!wildmatch(pattern, argv[i], 0)) {
+			struct rev_info revs;
+			struct commit *commit;
+			struct argv_array rev_argv = ARGV_ARRAY_INIT;
+
+			argv_array_pushl(&rev_argv, "skipped_commits", argv[i], NULL);
+			init_revisions(&revs, NULL);
+			setup_revisions(rev_argv.argc, rev_argv.argv, &revs, NULL);
+			argv_array_clear(&rev_argv);
+
+			if (prepare_revision_walk(&revs))
+				die(_("revision walk setup failed\n"));
+			while ((commit = get_revision(&revs)) != NULL)
+				argv_array_push(&argv_state,
+						oid_to_hex(&commit->object.oid));
+
+			reset_revision_walk();
+		} else {
+			argv_array_push(&argv_state, argv[i]);
+		}
+	}
+	res = bisect_state(terms, argv_state.argv, argv_state.argc);
+	argv_array_clear(&argv_state);
+	return res;
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {

@@ -1005,7 +1041,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		BISECT_NEXT,
 		BISECT_STATE,
 		BISECT_LOG,
-		BISECT_REPLAY
+		BISECT_REPLAY,
+		BISECT_SKIP
 	} cmdmode = 0;
 	int no_checkout = 0, res = 0, nolog = 0;
 	struct option options[] = {

@@ -1027,6 +1064,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			 N_("output the contents of BISECT_LOG"), BISECT_LOG),
 		OPT_CMDMODE(0, "bisect-replay", &cmdmode,
 			 N_("replay the bisection process from the given file"), BISECT_REPLAY),
+		OPT_CMDMODE(0, "bisect-skip", &cmdmode,
+			 N_("skip some commits for checkout"), BISECT_SKIP),
 		OPT_BOOL(0, "no-checkout", &no_checkout,
 			 N_("update BISECT_HEAD instead of checking out the current commit")),
 		OPT_BOOL(0, "no-log", &nolog,

@@ -1093,6 +1132,10 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		set_terms(&terms, "bad", "good");
 		res = bisect_replay(&terms, argv[0]);
 		break;
+	case BISECT_SKIP:
+		set_terms(&terms, "bad", "good");
+		res = bisect_skip(&terms, argv, argc);
+		break;
 	default:
 		return error("BUG: unknown subcommand '%d'", cmdmode);
 	}

index 0818dbf8ff..99e2c06ae5 100644
@@ -21,7 +21,6 @@ static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES")
 
 static const char * const git_bisect_helper_usage[] = {
 	N_("git bisect--helper --bisect-reset [<commit>]"),
-	N_("git bisect--helper --bisect-check-and-set-terms <command> <good_term> <bad_term>"),
 	N_("git bisect--helper --bisect-next-check <good_term> <bad_term> [<term>]"),
 	N_("git bisect--helper --bisect-terms [--term-good | --term-old | --term-bad | --term-new]"),
 	N_("git bisect--helper --bisect-start [--term-{old,good}=<term> --term-{new,bad}=<term>]"

@@ -1034,7 +1033,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {
 		BISECT_RESET = 1,
-		CHECK_AND_SET_TERMS,
 		BISECT_NEXT_CHECK,
 		BISECT_TERMS,
 		BISECT_START,

@@ -1048,8 +1046,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 	struct option options[] = {
 		OPT_CMDMODE(0, "bisect-reset", &cmdmode,
 			 N_("reset the bisection state"), BISECT_RESET),
-		OPT_CMDMODE(0, "check-and-set-terms", &cmdmode,
-			 N_("check and set terms in a bisection state"), CHECK_AND_SET_TERMS),
 		OPT_CMDMODE(0, "bisect-next-check", &cmdmode,
 			 N_("check whether bad or good terms exist"), BISECT_NEXT_CHECK),
 		OPT_CMDMODE(0, "bisect-terms", &cmdmode,

@@ -1087,12 +1083,6 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			return error(_("--bisect-reset requires either no argument or a commit"));
 		res = bisect_reset(argc ? argv[0] : NULL);
 		break;
-	case CHECK_AND_SET_TERMS:
-		if (argc != 3)
-			return error(_("--check-and-set-terms requires 3 arguments"));
-		set_terms(&terms, argv[2], argv[1]);
-		res = check_and_set_terms(&terms, argv[0]);
-		break;
 	case BISECT_NEXT_CHECK:
 		if (argc != 2 && argc != 3)
 			return error(_("--bisect-next-check requires 2 or 3 arguments"));