Merge branch 'jh/checkout-auto-tracking' into maint

"git branch --track" had a minor regression in v1.8.3.2 and later
that made it impossible to base your local work on anything but a
local branch of the upstream repository you are tracking from.

* jh/checkout-auto-tracking:
  t3200: fix failure on case-insensitive filesystems
  branch.c: Relax unnecessary requirement on upstream's remote ref name
  t3200: Add test demonstrating minor regression in 41c21f2
  Refer to branch.<name>.remote/merge when documenting --track
  t3200: Minor fix when preparing for tracking failure
  t2024: Fix &&-chaining and a couple of typos

Documentation/git-branch.txt

@@ -48,7 +48,8 @@ working tree to it; use "git checkout <newbranch>" to switch to the
 new branch.
 
 When a local branch is started off a remote-tracking branch, Git sets up the
-branch so that 'git pull' will appropriately merge from
+branch (specifically the `branch.<name>.remote` and `branch.<name>.merge`
+configuration entries) so that 'git pull' will appropriately merge from
 the remote-tracking branch. This behavior may be changed via the global
 `branch.autosetupmerge` configuration flag. That setting can be
 overridden by using the `--track` and `--no-track` options, and
@@ -156,7 +157,8 @@ This option is only applicable in non-verbose mode.
 
 -t::
 --track::
-	When creating a new branch, set up configuration to mark the
+	When creating a new branch, set up `branch.<name>.remote` and
+	`branch.<name>.merge` configuration entries to mark the
 	start-point branch as "upstream" from the new branch. This
 	configuration will tell git to show the relationship between the
 	two branches in `git status` and `git branch -v`. Furthermore,

branch.c

@@ -203,8 +203,7 @@ static int check_tracking_branch(struct remote *remote, void *cb_data)
 	struct refspec query;
 	memset(&query, 0, sizeof(struct refspec));
 	query.dst = tracking_branch;
-	return !(remote_find_tracking(remote, &query) ||
+	return !remote_find_tracking(remote, &query);
-		 prefixcmp(query.src, "refs/heads/"));
 }
 
 static int validate_remote_tracking_branch(char *ref)

t/t2024-checkout-dwim.sh

@@ -104,7 +104,7 @@ test_expect_success 'setup more remotes with unconventional refspecs' '
 		cd repo_c &&
 		test_commit c_master &&
 		git checkout -b bar &&
-		test_commit c_bar
+		test_commit c_bar &&
 		git checkout -b spam &&
 		test_commit c_spam
 	) &&
@@ -113,9 +113,9 @@ test_expect_success 'setup more remotes with unconventional refspecs' '
 		cd repo_d &&
 		test_commit d_master &&
 		git checkout -b baz &&
-		test_commit f_baz
+		test_commit d_baz &&
 		git checkout -b eggs &&
-		test_commit c_eggs
+		test_commit d_eggs
 	) &&
 	git remote add repo_c repo_c &&
 	git config remote.repo_c.fetch \

t/t3200-branch.sh

@@ -319,8 +319,9 @@ test_expect_success 'test tracking setup (non-wildcard, matching)' '
 
 test_expect_success 'tracking setup fails on non-matching refspec' '
 	git config remote.local.url . &&
-	git config remote.local.fetch refs/heads/s:refs/remotes/local/s &&
+	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
 	(git show-ref -q refs/remotes/local/master || git fetch local) &&
+	git config remote.local.fetch refs/heads/s:refs/remotes/local/s &&
 	test_must_fail git branch --track my5 local/master &&
 	test_must_fail git config branch.my5.remote &&
 	test_must_fail git config branch.my5.merge
@@ -870,4 +871,39 @@ test_expect_success '--merged catches invalid object names' '
 	test_must_fail git branch --merged 0000000000000000000000000000000000000000
 '
 
+test_expect_success 'tracking with unexpected .fetch refspec' '
+	rm -rf a b c d &&
+	git init a &&
+	(
+		cd a &&
+		test_commit a
+	) &&
+	git init b &&
+	(
+		cd b &&
+		test_commit b
+	) &&
+	git init c &&
+	(
+		cd c &&
+		test_commit c &&
+		git remote add a ../a &&
+		git remote add b ../b &&
+		git fetch --all
+	) &&
+	git init d &&
+	(
+		cd d &&
+		git remote add c ../c &&
+		git config remote.c.fetch "+refs/remotes/*:refs/remotes/*" &&
+		git fetch c &&
+		git branch --track local/a/master remotes/a/master &&
+		test "$(git config branch.local/a/master.remote)" = "c" &&
+		test "$(git config branch.local/a/master.merge)" = "refs/remotes/a/master" &&
+		git rev-parse --verify a >expect &&
+		git rev-parse --verify local/a/master >actual &&
+		test_cmp expect actual
+	)
+'
+
 test_done