git-p4: unshelve into refs/remotes/p4-unshelved, not refs/remotes/p4/unshelved

The branch detection code looks for branches under refs/remotes/p4/...
and can end up getting confused if there are unshelved changes in
there as well. This happens in the function p4BranchesInGit().

Instead, put the unshelved changes into refs/remotes/p4-unshelved/<N>.

Signed-off-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-p4.txt

@@ -174,7 +174,7 @@ $ git p4 submit --update-shelve 1234 --update-shelve 2345
 Unshelve
 ~~~~~~~~
 Unshelving will take a shelved P4 changelist, and produce the equivalent git commit
-in the branch refs/remotes/p4/unshelved/<changelist>.
+in the branch refs/remotes/p4-unshelved/<changelist>.
 
 The git commit is created relative to the current origin revision (HEAD by default).
 If the shelved changelist's parent revisions differ, git-p4 will refuse to unshelve;
@@ -182,13 +182,13 @@ you need to be unshelving onto an equivalent tree.
 
 The origin revision can be changed with the "--origin" option.
 
-If the target branch in refs/remotes/p4/unshelved already exists, the old one will
+If the target branch in refs/remotes/p4-unshelved already exists, the old one will
 be renamed.
 
 ----
 $ git p4 sync
 $ git p4 unshelve 12345
-$ git show refs/remotes/p4/unshelved/12345
+$ git show p4-unshelved/12345
 <submit more changes via p4 to the same files>
 $ git p4 unshelve 12345
 <refuses to unshelve until git is in sync with p4 again>

git-p4.py

@@ -3956,7 +3956,8 @@ class P4Unshelve(Command):
         ]
         self.verbose = False
         self.noCommit = False
-        self.destbranch = "refs/remotes/p4/unshelved"
+        self.destbranch = "refs/remotes/p4-unshelved"
+        self.origin = "p4/master"
 
     def renameBranch(self, branch_name):
         """ Rename the existing branch to branch_name.N

t/t9832-unshelve.sh

@@ -54,8 +54,8 @@ EOF
 		cd "$git" &&
 		change=$(last_shelved_change) &&
 		git p4 unshelve $change &&
-		git show refs/remotes/p4/unshelved/$change | grep -q "Further description" &&
-		git cherry-pick refs/remotes/p4/unshelved/$change &&
+		git show refs/remotes/p4-unshelved/$change | grep -q "Further description" &&
+		git cherry-pick refs/remotes/p4-unshelved/$change &&
 		test_path_is_file file2 &&
 		test_cmp file1 "$cli"/file1 &&
 		test_cmp file2 "$cli"/file2 &&
@@ -88,7 +88,7 @@ EOF
 		cd "$git" &&
 		change=$(last_shelved_change) &&
 		git p4 unshelve $change &&
-		git diff refs/remotes/p4/unshelved/$change.0 refs/remotes/p4/unshelved/$change | grep -q file3
+		git diff refs/remotes/p4-unshelved/$change.0 refs/remotes/p4-unshelved/$change | grep -q file3
 	)
 '