[PATCH 2/2] pull --rebase: add --[no-]autostash flag

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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@xxxxxxxxxxxxxxx>
Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
Helped-by: Paul Tan <pyokagan@xxxxxxxxx>
Helped-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx>
Signed-off-by: Mehul Jain <mehul.jain2029@xxxxxxxxx>
---
previous patches: http://thread.gmane.org/gmane.comp.version-control.git/287709

 Documentation/git-pull.txt |  9 +++++++++
 builtin/pull.c             | 13 +++++++++++--
 t/t5520-pull.sh            | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 59 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-pull.txt b/Documentation/git-pull.txt
index a62a2a6..a070ec9 100644
--- a/Documentation/git-pull.txt
+++ b/Documentation/git-pull.txt
@@ -128,6 +128,15 @@ unless you have read linkgit:git-rebase[1] carefully.
 --no-rebase::
 	Override earlier --rebase.
 
+--autostash::
+--no-autostash::
+	Before starting rebase, stash local modifications away (see
+	linkgit:git-stash.txt[1]) if needed, and apply the stash when
+	done (this option is only valid when "--rebase" is used).
++
+`--no-autostash` is useful to override the `rebase.autoStash`
+configuration variable (see linkgit:git-config[1]).
+
 Options related to fetching
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/builtin/pull.c b/builtin/pull.c
index 43353f9..c48e28a 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -86,6 +86,7 @@ static char *opt_commit;
 static char *opt_edit;
 static char *opt_ff;
 static char *opt_verify_signatures;
+static int opt_autostash = -1;
 static int config_autostash;
 static struct argv_array opt_strategies = ARGV_ARRAY_INIT;
 static struct argv_array opt_strategy_opts = ARGV_ARRAY_INIT;
@@ -150,6 +151,8 @@ static struct option pull_options[] = {
 	OPT_PASSTHRU(0, "verify-signatures", &opt_verify_signatures, NULL,
 		N_("verify that the named commit has a valid GPG signature"),
 		PARSE_OPT_NOARG),
+	OPT_BOOL(0, "autostash", &opt_autostash,
+		N_("automatically stash/stash pop before and after rebase")),
 	OPT_PASSTHRU_ARGV('s', "strategy", &opt_strategies, N_("strategy"),
 		N_("merge strategy to use"),
 		0),
@@ -801,6 +804,7 @@ 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);
+	argv_array_push(&args, opt_autostash ? "--autostash" : "--no-autostash");
 
 	argv_array_push(&args, "--onto");
 	argv_array_push(&args, sha1_to_hex(merge_head));
@@ -851,12 +855,17 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 		if (is_null_sha1(orig_head) && !is_cache_unborn())
 			die(_("Updating an unborn branch with changes added to the index."));
 
-		if (config_autostash)
+		if (opt_autostash == -1)
+			opt_autostash = config_autostash;
+
+		if (!opt_autostash)
 			die_on_unclean_work_tree(prefix);
 
 		if (get_rebase_fork_point(rebase_fork_point, repo, *refspecs))
 			hashclr(rebase_fork_point);
-	}
+	} else
+		if (opt_autostash != -1)
+			 die(_("--[no-]autostash option is only valid with --rebase."));
 
 	if (run_fetch(repo, refspecs))
 		return 1;
diff --git a/t/t5520-pull.sh b/t/t5520-pull.sh
index c952d5e..85d9bea 100755
--- a/t/t5520-pull.sh
+++ b/t/t5520-pull.sh
@@ -255,6 +255,45 @@ test_expect_success 'pull --rebase succeeds with dirty working directory and reb
 	test "$(cat new_file)" = dirty &&
 	test "$(cat file)" = "modified again"
 '
+test_expect_success 'pull --rebase: --autostash overrides rebase.autostash' '
+	test_config rebase.autostash false &&
+	git reset --hard before-rebase &&
+	echo dirty >new_file &&
+	git add new_file &&
+	git pull --rebase --autostash . copy &&
+	test_cmp_rev HEAD^ copy &&
+	test "$(cat new_file)" = dirty &&
+	test "$(cat file)" = "modified again"
+'
+
+test_expect_success 'pull --rebase --autostash works with rebase.autostash set true' '
+	test_config rebase.autostash true &&
+	git reset --hard before-rebase &&
+	echo dirty >new_file &&
+	git add new_file &&
+	git pull --rebase --autostash . copy &&
+	test_cmp_rev HEAD^ copy &&
+	test "$(cat new_file)" = dirty &&
+	test "$(cat file)" = "modified again"
+'
+
+test_expect_success 'pull --rebase: --no-autostash overrides rebase.autostash' '
+	test_config rebase.autostash true &&
+	git reset --hard before-rebase &&
+	echo dirty >new_file &&
+	git add new_file &&
+	test_must_fail git pull --rebase --no-autostash . copy 2>err &&
+	test_i18ngrep "Cannot pull with rebase: Your index contains uncommitted changes." err
+'
+
+test_expect_success 'pull --rebase --no-autostash works with rebase.autostash set false' '
+	test_config rebase.autostash false &&
+	git reset --hard before-rebase &&
+	echo dirty >new_file &&
+	git add new_file &&
+	test_must_fail git pull --rebase --no-autostash . copy 2>err &&
+	test_i18ngrep "Cannot pull with rebase: Your index contains uncommitted changes." err
+'
 
 test_expect_success 'pull.rebase' '
 	git reset --hard before-rebase &&
-- 
2.7.1.340.g69eb491.dirty

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