builtin-remote: new show output style for push refspecs

The existing output of "git remote show <remote>" with respect to push
ref specs is basically just to show the raw refspec. This patch teaches
the command to interpret the refspecs and show how each branch will be
pushed to the destination. The output gives the user an idea of what
"git push" should do if it is run w/o any arguments.

Example new output:

1a. Typical output with no push refspec (i.e. matching branches only)

$ git remote show origin
* remote origin
  [...]
  Local refs configured for 'git push':
    master pushes to master (up to date)
    next   pushes to next   (local out of date)

1b. Same as above, w/o querying the remote:

$ git remote show origin -n
* remote origin
  [...]
  Local ref configured for 'git push' (status not queried):
    (matching) pushes to (matching)

2a. With a forcing refspec (+), and a new topic
    (something like push = refs/heads/*:refs/heads/*):

$ git remote show origin
* remote origin
  [...]
  Local refs configured for 'git push':
    master     pushes to master    (fast forwardable)
    new-topic  pushes to new-topic (create)
    next       pushes to next      (local out of date)
    pu         forces to pu        (up to date)

2b. Same as above, w/o querying the remote

$ git remote show origin -n
* remote origin
  [...]
  Local refs configured for 'git push' (status not queried):
    master     pushes to master
    new-topic  pushes to new-topic
    next       pushes to next
    pu         forces to pu

3. With a remote configured as a mirror:

* remote backup
  [...]
  Local refs will be mirrored by 'git push'

Signed-off-by: Jay Soffian <jaysoffian@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 22 insertions, 8 deletions

diff --git a/t/t5505-remote.sh b/t/t5505-remote.sh
index 69e241a0a5..5ec668d6d8 100755
--- a/t/t5505-remote.sh
+++ b/t/t5505-remote.sh
@@ -141,25 +141,34 @@ cat > test/expect << EOF
     master new (next fetch will store in remotes/origin)
     side   tracked
   Local branches configured for 'git pull':
+    ahead    merges with remote master
     master   merges with remote master
     octopus  merges with remote topic-a
                 and with remote topic-b
                 and with remote topic-c
     rebase  rebases onto remote master
-  Local branches pushed with 'git push'
-    master:upstream
-    +refs/tags/lastbackup
+  Local refs configured for 'git push':
+    master pushes to master   (local out of date)
+    master pushes to upstream (create)
 * remote two
   URL: ../two
   HEAD branch (remote HEAD is ambiguous, may be one of the following):
     another
     master
+  Local refs configured for 'git push':
+    ahead  forces to master  (fast forwardable)
+    master pushes to another (up to date)
 EOF
 
 test_expect_success 'show' '
 	(cd test &&
 	 git config --add remote.origin.fetch refs/heads/master:refs/heads/upstream &&
 	 git fetch &&
+	 git checkout -b ahead origin/master &&
+	 echo 1 >> file &&
+	 test_tick &&
+	 git commit -m update file &&
+	 git checkout master &&
 	 git branch --track octopus origin/master &&
 	 git branch --track rebase origin/master &&
 	 git branch -d -r origin/master &&
@@ -170,8 +179,11 @@ test_expect_success 'show' '
 	  echo 1 > file &&
 	  test_tick &&
 	  git commit -m update file) &&
-	 git config remote.origin.push refs/heads/master:refs/heads/upstream &&
+	 git config --add remote.origin.push : &&
+	 git config --add remote.origin.push refs/heads/master:refs/heads/upstream &&
 	 git config --add remote.origin.push +refs/tags/lastbackup &&
+	 git config --add remote.two.push +refs/heads/ahead:refs/heads/master &&
+	 git config --add remote.two.push refs/heads/master:refs/heads/another &&
 	 git remote show origin two > output &&
 	 git branch -d rebase octopus &&
 	 test_cmp expect output)
@@ -184,11 +196,13 @@ cat > test/expect << EOF
   Remote branches: (status not queried)
     master
     side
-  Local branch configured for 'git pull':
+  Local branches configured for 'git pull':
+    ahead  merges with remote master
     master merges with remote master
-  Local branches pushed with 'git push'
-    master:upstream
-    +refs/tags/lastbackup
+  Local refs configured for 'git push' (status not queried):
+    (matching)           pushes to (matching)
+    refs/heads/master    pushes to refs/heads/upstream
+    refs/tags/lastbackup forces to refs/tags/lastbackup
 EOF
 
 test_expect_success 'show -n' '