[PATCH v3 1/3] pull --rebase: add --[no-]autostash flag

[Mehul Jain <mehul.jain2029@gmail.com>]

If rebase.autoStash configuration variable is 
set, there is no way to override it for 
"git pull --rebase" from the command line.

Teach "git pull --rebase" the --[no]autostash
command line flag which overrides the current
value of rebase.autostash, if set. As "git rebase"
understands the --[no]autostash option, it's 
just a matter of passing the option to underlying 
"git rebase" when "git pull --rebase" is called.

Helped-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Mehul Jain <mehul.jain2029@gmail.com>
---
Sorry for a late follow up. I had my mid-semester
examination going on.

Previous patch: $gname287709

Changes:
	* error message is produced when "git pull
	 --[no]autostash" is called.
  	* opt_autostash intialized with -1.

 builtin/pull.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/builtin/pull.c b/builtin/pull.c
index 10eff03..b338b83 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -85,6 +85,7 @@ static char *opt_squash;
 static char *opt_commit;
 static char *opt_edit;
 static char *opt_ff;
+static int opt_autostash = -1;
 static char *opt_verify_signatures;
 static struct argv_array opt_strategies = ARGV_ARRAY_INIT;
 static struct argv_array opt_strategy_opts = ARGV_ARRAY_INIT;
@@ -146,6 +147,8 @@ static struct option pull_options[] = {
 	OPT_PASSTHRU(0, "ff-only", &opt_ff, NULL,
 		N_("abort if fast-forward is not possible"),
 		PARSE_OPT_NOARG | PARSE_OPT_NONEG),
+	OPT_BOOL(0, "autostash", &opt_autostash,
+		N_("automatically stash/stash pop before and after rebase")),
 	OPT_PASSTHRU(0, "verify-signatures", &opt_verify_signatures, NULL,
 		N_("verify that the named commit has a valid GPG signature"),
 		PARSE_OPT_NOARG),
@@ -789,7 +792,8 @@ static int run_rebase(const unsigned char *curr_head,
 	argv_array_pushv(&args, opt_strategy_opts.argv);
 	if (opt_gpg_sign)
 		argv_array_push(&args, opt_gpg_sign);
-
+	if (opt_autostash)
+		argv_array_push(&args, "--autostash");
 	argv_array_push(&args, "--onto");
 	argv_array_push(&args, sha1_to_hex(merge_head));
 
@@ -835,18 +839,25 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 		hashclr(orig_head);
 
 	if (opt_rebase) {
-		int autostash = 0;
-
 		if (is_null_sha1(orig_head) && !is_cache_unborn())
 			die(_("Updating an unborn branch with changes added to the index."));
 
-		git_config_get_bool("rebase.autostash", &autostash);
-		if (!autostash)
+		if (opt_autostash == -1)
+			git_config_get_bool("rebase.autostash", &opt_autostash);
+
+		if (opt_autostash == 0 || opt_autostash == -1)
 			die_on_unclean_work_tree(prefix);
 
 		if (get_rebase_fork_point(rebase_fork_point, repo, *refspecs))
 			hashclr(rebase_fork_point);
 	}
+	else {
+		/* If --[no-]autostash option is called without --rebase */
+		if (opt_autostash == 0)
+			die(_("--no-autostash option is only valid with --rebase."));
+		else if (opt_autostash == 1)
+			die(_("--autostash option is only valid with --rebase."));
+	}
 
 	if (run_fetch(repo, refspecs))
 		return 1;
-- 
2.7.1.340.g69eb491.dirty