1 files changed, 166 insertions, 58 deletions

diff --git a/sequencer.c b/sequencer.c
index 6fd2674632..fd7701c88a 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -32,6 +32,7 @@
 #include "alias.h"
 #include "commit-reach.h"
 #include "rebase-interactive.h"
+#include "reset.h"
 
 #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
 
@@ -419,25 +420,15 @@ static int write_message(const void *buf, size_t len, const char *filename,
 	return 0;
 }
 
-/*
- * Reads a file that was presumably written by a shell script, i.e. with an
- * end-of-line marker that needs to be stripped.
- *
- * Note that only the last end-of-line marker is stripped, consistent with the
- * behavior of "$(cat path)" in a shell script.
- *
- * Returns 1 if the file was read, 0 if it could not be read or does not exist.
- */
-static int read_oneliner(struct strbuf *buf,
-	const char *path, int skip_if_empty)
+int read_oneliner(struct strbuf *buf,
+	const char *path, unsigned flags)
 {
 	int orig_len = buf->len;
 
-	if (!file_exists(path))
-		return 0;
-
 	if (strbuf_read_file(buf, path, 0) < 0) {
-		warning_errno(_("could not read '%s'"), path);
+		if ((flags & READ_ONELINER_WARN_MISSING) ||
+		    (errno != ENOENT && errno != ENOTDIR))
+			warning_errno(_("could not read '%s'"), path);
 		return 0;
 	}
 
@@ -447,7 +438,7 @@ static int read_oneliner(struct strbuf *buf,
 		buf->buf[buf->len] = '\0';
 	}
 
-	if (skip_if_empty && buf->len == orig_len)
+	if ((flags & READ_ONELINER_SKIP_IF_EMPTY) && buf->len == orig_len)
 		return 0;
 
 	return 1;
@@ -946,6 +937,8 @@ static int run_git_commit(struct repository *r,
 		argv_array_push(&cmd.args, "--amend");
 	if (opts->gpg_sign)
 		argv_array_pushf(&cmd.args, "-S%s", opts->gpg_sign);
+	else
+		argv_array_push(&cmd.args, "--no-gpg-sign");
 	if (defmsg)
 		argv_array_pushl(&cmd.args, "-F", defmsg, NULL);
 	else if (!(flags & EDIT_MSG))
@@ -1578,7 +1571,7 @@ static const char *command_to_string(const enum todo_command command)
 
 static char command_to_char(const enum todo_command command)
 {
-	if (command < TODO_COMMENT && todo_command_info[command].c)
+	if (command < TODO_COMMENT)
 		return todo_command_info[command].c;
 	return comment_line_char;
 }
@@ -2502,8 +2495,10 @@ static int read_populate_opts(struct replay_opts *opts)
 {
 	if (is_rebase_i(opts)) {
 		struct strbuf buf = STRBUF_INIT;
+		int ret = 0;
 
-		if (read_oneliner(&buf, rebase_path_gpg_sign_opt(), 1)) {
+		if (read_oneliner(&buf, rebase_path_gpg_sign_opt(),
+				  READ_ONELINER_SKIP_IF_EMPTY)) {
 			if (!starts_with(buf.buf, "-S"))
 				strbuf_reset(&buf);
 			else {
@@ -2513,7 +2508,8 @@ static int read_populate_opts(struct replay_opts *opts)
 			strbuf_reset(&buf);
 		}
 
-		if (read_oneliner(&buf, rebase_path_allow_rerere_autoupdate(), 1)) {
+		if (read_oneliner(&buf, rebase_path_allow_rerere_autoupdate(),
+				  READ_ONELINER_SKIP_IF_EMPTY)) {
 			if (!strcmp(buf.buf, "--rerere-autoupdate"))
 				opts->allow_rerere_auto = RERERE_AUTOUPDATE;
 			else if (!strcmp(buf.buf, "--no-rerere-autoupdate"))
@@ -2542,10 +2538,11 @@ static int read_populate_opts(struct replay_opts *opts)
 			opts->keep_redundant_commits = 1;
 
 		read_strategy_opts(opts, &buf);
-		strbuf_release(&buf);
+		strbuf_reset(&buf);
 
 		if (read_oneliner(&opts->current_fixups,
-				  rebase_path_current_fixups(), 1)) {
+				  rebase_path_current_fixups(),
+				  READ_ONELINER_SKIP_IF_EMPTY)) {
 			const char *p = opts->current_fixups.buf;
 			opts->current_fixup_count = 1;
 			while ((p = strchr(p, '\n'))) {
@@ -2555,12 +2552,16 @@ static int read_populate_opts(struct replay_opts *opts)
 		}
 
 		if (read_oneliner(&buf, rebase_path_squash_onto(), 0)) {
-			if (get_oid_hex(buf.buf, &opts->squash_onto) < 0)
-				return error(_("unusable squash-onto"));
+			if (get_oid_hex(buf.buf, &opts->squash_onto) < 0) {
+				ret = error(_("unusable squash-onto"));
+				goto done_rebase_i;
+			}
 			opts->have_squash_onto = 1;
 		}
 
-		return 0;
+done_rebase_i:
+		strbuf_release(&buf);
+		return ret;
 	}
 
 	if (!file_exists(git_path_opts_file()))
@@ -3128,7 +3129,7 @@ static int do_exec(struct repository *r, const char *command_line)
 	const char *child_argv[] = { NULL, NULL };
 	int dirty, status;
 
-	fprintf(stderr, "Executing: %s\n", command_line);
+	fprintf(stderr, _("Executing: %s\n"), command_line);
 	child_argv[0] = command_line;
 	argv_array_pushf(&child_env, "GIT_DIR=%s", absolute_path(get_git_dir()));
 	argv_array_pushf(&child_env, "GIT_WORK_TREE=%s",
@@ -3675,25 +3676,71 @@ static enum todo_command peek_command(struct todo_list *todo_list, int offset)
 	return -1;
 }
 
-static int apply_autostash(struct replay_opts *opts)
+void create_autostash(struct repository *r, const char *path,
+		      const char *default_reflog_action)
+{
+	struct strbuf buf = STRBUF_INIT;
+	struct lock_file lock_file = LOCK_INIT;
+	int fd;
+
+	fd = repo_hold_locked_index(r, &lock_file, 0);
+	refresh_index(r->index, REFRESH_QUIET, NULL, NULL, NULL);
+	if (0 <= fd)
+		repo_update_index_if_able(r, &lock_file);
+	rollback_lock_file(&lock_file);
+
+	if (has_unstaged_changes(r, 1) ||
+	    has_uncommitted_changes(r, 1)) {
+		struct child_process stash = CHILD_PROCESS_INIT;
+		struct object_id oid;
+
+		argv_array_pushl(&stash.args,
+				 "stash", "create", "autostash", NULL);
+		stash.git_cmd = 1;
+		stash.no_stdin = 1;
+		strbuf_reset(&buf);
+		if (capture_command(&stash, &buf, GIT_MAX_HEXSZ))
+			die(_("Cannot autostash"));
+		strbuf_trim_trailing_newline(&buf);
+		if (get_oid(buf.buf, &oid))
+			die(_("Unexpected stash response: '%s'"),
+			    buf.buf);
+		strbuf_reset(&buf);
+		strbuf_add_unique_abbrev(&buf, &oid, DEFAULT_ABBREV);
+
+		if (safe_create_leading_directories_const(path))
+			die(_("Could not create directory for '%s'"),
+			    path);
+		write_file(path, "%s", oid_to_hex(&oid));
+		printf(_("Created autostash: %s\n"), buf.buf);
+		if (reset_head(r, NULL, "reset --hard",
+			       NULL, RESET_HEAD_HARD, NULL, NULL,
+			       default_reflog_action) < 0)
+			die(_("could not reset --hard"));
+
+		if (discard_index(r->index) < 0 ||
+			repo_read_index(r) < 0)
+			die(_("could not read index"));
+	}
+	strbuf_release(&buf);
+}
+
+static int apply_save_autostash_oid(const char *stash_oid, int attempt_apply)
 {
-	struct strbuf stash_sha1 = STRBUF_INIT;
 	struct child_process child = CHILD_PROCESS_INIT;
 	int ret = 0;
 
-	if (!read_oneliner(&stash_sha1, rebase_path_autostash(), 1)) {
-		strbuf_release(&stash_sha1);
-		return 0;
+	if (attempt_apply) {
+		child.git_cmd = 1;
+		child.no_stdout = 1;
+		child.no_stderr = 1;
+		argv_array_push(&child.args, "stash");
+		argv_array_push(&child.args, "apply");
+		argv_array_push(&child.args, stash_oid);
+		ret = run_command(&child);
 	}
-	strbuf_trim(&stash_sha1);
 
-	child.git_cmd = 1;
-	child.no_stdout = 1;
-	child.no_stderr = 1;
-	argv_array_push(&child.args, "stash");
-	argv_array_push(&child.args, "apply");
-	argv_array_push(&child.args, stash_sha1.buf);
-	if (!run_command(&child))
+	if (attempt_apply && !ret)
 		fprintf(stderr, _("Applied autostash.\n"));
 	else {
 		struct child_process store = CHILD_PROCESS_INIT;
@@ -3704,30 +3751,67 @@ static int apply_autostash(struct replay_opts *opts)
 		argv_array_push(&store.args, "-m");
 		argv_array_push(&store.args, "autostash");
 		argv_array_push(&store.args, "-q");
-		argv_array_push(&store.args, stash_sha1.buf);
+		argv_array_push(&store.args, stash_oid);
 		if (run_command(&store))
-			ret = error(_("cannot store %s"), stash_sha1.buf);
+			ret = error(_("cannot store %s"), stash_oid);
 		else
 			fprintf(stderr,
-				_("Applying autostash resulted in conflicts.\n"
+				_("%s\n"
 				  "Your changes are safe in the stash.\n"
 				  "You can run \"git stash pop\" or"
-				  " \"git stash drop\" at any time.\n"));
+				  " \"git stash drop\" at any time.\n"),
+				attempt_apply ?
+				_("Applying autostash resulted in conflicts.") :
+				_("Autostash exists; creating a new stash entry."));
+	}
+
+	return ret;
+}
+
+static int apply_save_autostash(const char *path, int attempt_apply)
+{
+	struct strbuf stash_oid = STRBUF_INIT;
+	int ret = 0;
+
+	if (!read_oneliner(&stash_oid, path,
+			   READ_ONELINER_SKIP_IF_EMPTY)) {
+		strbuf_release(&stash_oid);
+		return 0;
 	}
+	strbuf_trim(&stash_oid);
+
+	ret = apply_save_autostash_oid(stash_oid.buf, attempt_apply);
 
-	strbuf_release(&stash_sha1);
+	unlink(path);
+	strbuf_release(&stash_oid);
 	return ret;
 }
 
+int save_autostash(const char *path)
+{
+	return apply_save_autostash(path, 0);
+}
+
+int apply_autostash(const char *path)
+{
+	return apply_save_autostash(path, 1);
+}
+
+int apply_autostash_oid(const char *stash_oid)
+{
+	return apply_save_autostash_oid(stash_oid, 1);
+}
+
 static const char *reflog_message(struct replay_opts *opts,
 	const char *sub_action, const char *fmt, ...)
 {
 	va_list ap;
 	static struct strbuf buf = STRBUF_INIT;
+	char *reflog_action = getenv(GIT_REFLOG_ACTION);
 
 	va_start(ap, fmt);
 	strbuf_reset(&buf);
-	strbuf_addstr(&buf, action_name(opts));
+	strbuf_addstr(&buf, reflog_action ? reflog_action : action_name(opts));
 	if (sub_action)
 		strbuf_addf(&buf, " (%s)", sub_action);
 	if (fmt) {
@@ -3773,7 +3857,7 @@ static int checkout_onto(struct repository *r, struct replay_opts *opts,
 		return error(_("%s: not a valid OID"), orig_head);
 
 	if (run_git_checkout(r, opts, oid_to_hex(onto), action)) {
-		apply_autostash(opts);
+		apply_autostash(rebase_path_autostash());
 		sequencer_remove_state(opts);
 		return error(_("could not detach HEAD"));
 	}
@@ -3815,8 +3899,11 @@ static int pick_commits(struct repository *r,
 			struct replay_opts *opts)
 {
 	int res = 0, reschedule = 0;
+	char *prev_reflog_action;
 
+	/* Note that 0 for 3rd parameter of setenv means set only if not set */
 	setenv(GIT_REFLOG_ACTION, action_name(opts), 0);
+	prev_reflog_action = xstrdup(getenv(GIT_REFLOG_ACTION));
 	if (opts->allow_ff)
 		assert(!(opts->signoff || opts->no_commit ||
 				opts->record_origin || opts->edit));
@@ -3841,7 +3928,7 @@ static int pick_commits(struct repository *r,
 					fclose(f);
 				}
 				if (!opts->quiet)
-					fprintf(stderr, "Rebasing (%d/%d)%s",
+					fprintf(stderr, _("Rebasing (%d/%d)%s"),
 						todo_list->done_nr,
 						todo_list->total_nr,
 						opts->verbose ? "\n" : "\r");
@@ -3861,12 +3948,14 @@ static int pick_commits(struct repository *r,
 		}
 		if (item->command <= TODO_SQUASH) {
 			if (is_rebase_i(opts))
-				setenv("GIT_REFLOG_ACTION", reflog_message(opts,
+				setenv(GIT_REFLOG_ACTION, reflog_message(opts,
 					command_to_string(item->command), NULL),
 					1);
 			res = do_pick_commit(r, item->command, item->commit,
 					     opts, is_final_fixup(todo_list),
 					     &check_todo);
+			if (is_rebase_i(opts))
+				setenv(GIT_REFLOG_ACTION, prev_reflog_action, 1);
 			if (is_rebase_i(opts) && res < 0) {
 				/* Reschedule */
 				advise(_(rescheduled_advice),
@@ -4087,13 +4176,13 @@ cleanup_head_ref:
 				run_command(&hook);
 			}
 		}
-		apply_autostash(opts);
+		apply_autostash(rebase_path_autostash());
 
 		if (!opts->quiet) {
 			if (!opts->verbose)
 				term_clear_line();
 			fprintf(stderr,
-				"Successfully rebased and updated %s.\n",
+				_("Successfully rebased and updated %s.\n"),
 				head_ref.buf);
 		}
 
@@ -4305,7 +4394,8 @@ int sequencer_continue(struct repository *r, struct replay_opts *opts)
 		struct strbuf buf = STRBUF_INIT;
 		struct object_id oid;
 
-		if (read_oneliner(&buf, rebase_path_stopped_sha(), 1) &&
+		if (read_oneliner(&buf, rebase_path_stopped_sha(),
+				  READ_ONELINER_SKIP_IF_EMPTY) &&
 		    !get_oid_committish(buf.buf, &oid))
 			record_in_rewritten(&oid, peek_command(&todo_list, 0));
 		strbuf_release(&buf);
@@ -4607,6 +4697,7 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 				   struct rev_info *revs, struct strbuf *out,
 				   unsigned flags)
 {
+	int keep_empty = flags & TODO_LIST_KEEP_EMPTY;
 	int rebase_cousins = flags & TODO_LIST_REBASE_COUSINS;
 	int root_with_onto = flags & TODO_LIST_ROOT_WITH_ONTO;
 	struct strbuf buf = STRBUF_INIT, oneline = STRBUF_INIT;
@@ -4661,6 +4752,8 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 		is_empty = is_original_commit_empty(commit);
 		if (!is_empty && (commit->object.flags & PATCHSAME))
 			continue;
+		if (is_empty && !keep_empty)
+			continue;
 
 		strbuf_reset(&oneline);
 		pretty_print_commit(pp, commit, &oneline);
@@ -4672,6 +4765,9 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 			strbuf_addf(&buf, "%s %s %s", cmd_pick,
 				    oid_to_hex(&commit->object.oid),
 				    oneline.buf);
+			if (is_empty)
+				strbuf_addf(&buf, " %c empty",
+					    comment_line_char);
 
 			FLEX_ALLOC_STR(entry, string, buf.buf);
 			oidcpy(&entry->entry.oid, &commit->object.oid);
@@ -4835,14 +4931,16 @@ int sequencer_make_script(struct repository *r, struct strbuf *out, int argc,
 	struct pretty_print_context pp = {0};
 	struct rev_info revs;
 	struct commit *commit;
+	int keep_empty = flags & TODO_LIST_KEEP_EMPTY;
 	const char *insn = flags & TODO_LIST_ABBREVIATE_CMDS ? "p" : "pick";
 	int rebase_merges = flags & TODO_LIST_REBASE_MERGES;
+	int reapply_cherry_picks = flags & TODO_LIST_REAPPLY_CHERRY_PICKS;
 
 	repo_init_revisions(r, &revs, NULL);
 	revs.verbose_header = 1;
 	if (!rebase_merges)
 		revs.max_parents = 1;
-	revs.cherry_mark = 1;
+	revs.cherry_mark = !reapply_cherry_picks;
 	revs.limited = 1;
 	revs.reverse = 1;
 	revs.right_only = 1;
@@ -4874,9 +4972,13 @@ int sequencer_make_script(struct repository *r, struct strbuf *out, int argc,
 
 		if (!is_empty && (commit->object.flags & PATCHSAME))
 			continue;
+		if (is_empty && !keep_empty)
+			continue;
 		strbuf_addf(out, "%s %s ", insn,
 			    oid_to_hex(&commit->object.oid));
 		pretty_print_commit(&pp, commit, out);
+		if (is_empty)
+			strbuf_addf(out, " %c empty", comment_line_char);
 		strbuf_addch(out, '\n');
 	}
 	return 0;
@@ -4963,6 +5065,8 @@ static void todo_list_to_strbuf(struct repository *r, struct todo_list *todo_lis
 		max = num;
 
 	for (item = todo_list->items, i = 0; i < max; i++, item++) {
+		char cmd;
+
 		/* if the item is not a command write it and continue */
 		if (item->command >= TODO_COMMENT) {
 			strbuf_addf(buf, "%.*s\n", item->arg_len,
@@ -4971,8 +5075,9 @@ static void todo_list_to_strbuf(struct repository *r, struct todo_list *todo_lis
 		}
 
 		/* add command to the buffer */
-		if (flags & TODO_LIST_ABBREVIATE_CMDS)
-			strbuf_addch(buf, command_to_char(item->command));
+		cmd = command_to_char(item->command);
+		if ((flags & TODO_LIST_ABBREVIATE_CMDS) && cmd)
+			strbuf_addch(buf, cmd);
 		else
 			strbuf_addstr(buf, command_to_string(item->command));
 
@@ -5095,7 +5200,7 @@ int complete_action(struct repository *r, struct replay_opts *opts, unsigned fla
 		todo_list_add_exec_commands(todo_list, commands);
 
 	if (count_commands(todo_list) == 0) {
-		apply_autostash(opts);
+		apply_autostash(rebase_path_autostash());
 		sequencer_remove_state(opts);
 
 		return error(_("nothing to do"));
@@ -5106,12 +5211,12 @@ int complete_action(struct repository *r, struct replay_opts *opts, unsigned fla
 	if (res == -1)
 		return -1;
 	else if (res == -2) {
-		apply_autostash(opts);
+		apply_autostash(rebase_path_autostash());
 		sequencer_remove_state(opts);
 
 		return -1;
 	} else if (res == -3) {
-		apply_autostash(opts);
+		apply_autostash(rebase_path_autostash());
 		sequencer_remove_state(opts);
 		todo_list_release(&new_todo);
 
@@ -5280,10 +5385,13 @@ int todo_list_rearrange_squash(struct todo_list *todo_list)
 			todo_list->items[i].command =
 				starts_with(subject, "fixup!") ?
 				TODO_FIXUP : TODO_SQUASH;
-			if (next[i2] < 0)
+			if (tail[i2] < 0) {
+				next[i] = next[i2];
 				next[i2] = i;
-			else
+			} else {
+				next[i] = next[tail[i2]];
 				next[tail[i2]] = i;
+			}
 			tail[i2] = i;
 		} else if (!hashmap_get_from_hash(&subject2item,
 						strhash(subject), subject)) {