[PATCH v2] pull: fix 'git pull --all' when current branch is tracking remote that is not last in the list of remotes

[Michael Lukashov <michael.lukashov@gmail.com>]

Steps to reproduce the bug:

	1. Create repository and add more than one remote
	2. Make sure current branch is tracking branch from the remote AND this remote
	   is not last in the list of remotes
	3. 'git pull --all' exits with error message:

		You asked to pull from the remote '--all', but did not specify
		a branch. Because this is not the default configured remote
		for your current branch, you must specify a branch on the command line.

After 'git pull --all' you need to run 'git pull' to update current branch.
This is annoying.

After this patch, 'git pull --all' does what it should do - fetches all changes
from all remotes and then updates current branch, if there were changes.

A minimal test case is added that reproduces the problem.
Tested under Windows and Debian GNU/Linux.

Signed-off-by: Michael Lukashov <michael.lukashov@gmail.com>
---
 builtin-fetch.c         |    6 +++++-
 git-pull.sh             |    6 +++++-
 t/t5521-pull-options.sh |   39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/builtin-fetch.c b/builtin-fetch.c
index d3b9d8a..8e54c5a 100644
--- a/builtin-fetch.c
+++ b/builtin-fetch.c
@@ -784,13 +784,17 @@ static int add_remote_or_group(const char *name, struct string_list *list)
 static int fetch_multiple(struct string_list *list)
 {
 	int i, result = 0;
-	const char *argv[] = { "fetch", NULL, NULL, NULL, NULL, NULL, NULL };
+	const char *argv[] = { "fetch", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
 	int argc = 1;
 
 	if (dry_run)
 		argv[argc++] = "--dry-run";
 	if (prune)
 		argv[argc++] = "--prune";
+	if (append)
+		argv[argc++] = "--append";
+	if (update_head_ok)
+		argv[argc++] = "--update-head-ok";
 	if (verbosity >= 2)
 		argv[argc++] = "-v";
 	if (verbosity >= 1)
diff --git a/git-pull.sh b/git-pull.sh
index 38331a8..2fbee42 100755
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -214,7 +214,11 @@ test true = "$rebase" && {
 	done
 }
 orig_head=$(git rev-parse -q --verify HEAD)
-git fetch $verbosity --update-head-ok "$@" || exit 1
+if test -e "$GIT_DIR"/FETCH_HEAD
+then
+	rm -f "$GIT_DIR"/FETCH_HEAD || exit
+fi
+git fetch $verbosity --update-head-ok --append "$@" || exit 1
 
 curr_head=$(git rev-parse -q --verify HEAD)
 if test -n "$orig_head" && test "$curr_head" != "$orig_head"
diff --git a/t/t5521-pull-options.sh b/t/t5521-pull-options.sh
index 83e2e8a..2665caa 100755
--- a/t/t5521-pull-options.sh
+++ b/t/t5521-pull-options.sh
@@ -4,6 +4,17 @@ test_description='pull options'
 
 . ./test-lib.sh
 
+setup_repository () {
+	mkdir "$1" && (
+	cd "$1" &&
+	git init &&
+	>file &&
+	git add file &&
+	test_tick &&
+	git commit -m "Initial"
+	)
+}
+
 D=`pwd`
 
 test_expect_success 'setup' '
@@ -57,4 +68,32 @@ test_expect_success 'git pull -q -v' '
 	test -s out
 '
 
+cd "$D"
+
+test_expect_success 'git pull --all' '
+	mkdir pullall &&
+	cd pullall &&
+	setup_repository remote1 &&
+	setup_repository remote2 &&
+	mkdir test &&
+	cd test &&
+	git init &&
+	git remote add remote1 "$D/pullall/remote1" &&
+	git remote add remote2 "$D/pullall/remote2" &&
+	(
+		# "git pull remote1" should print error message
+		# because there is no local branch that is tracking remote repo
+		git pull remote1
+		test $? = 1
+	) &&
+	(
+		# "git pull --all" should not print error message
+		# when current branch is tracking remote repo and that remote
+		# is not last in the list of remotes
+		git checkout -b remote1master remote1/master
+		git pull --all
+		test $? = 0
+	)
+'
+
 test_done
-- 
1.7.0.1706.g00cdbe