harmonize --current-branch short option across subcommands

We're inconsistent with the short option for this flag:
* gitc-init: <none as -c is already used>
* info:      -b
* init:      -c
* overview:  -b
* sync:      -c
* upload:   --cbr

Since info & overview are not as heavily used as the others, switch
them from -b to -c.  We leave -b in as a hidden alias for now.

Similarly, switch upload from --cbr to just -c.  A lot of people
use --cbr, so we leave this as a hidden alias for now too.

Ideally gitc-init wouldn't use -c, but that ship has sailed, and
we're more likely to deprecate gitc entirely at this point.

This provides a consistent set of options across subcommands.

Bug: https://crbug.com/gerrit/12401
Change-Id: Iec249729223866fe1ea0ebabed12ca851cc38b35
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/304902
Reviewed-by: Raman Tenneti <rtenneti@google.com>
Tested-by: Mike Frysinger <vapier@google.com>

subcmds/info.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import optparse
+
 from command import PagedCommand
 from color import Coloring
 from git_refs import R_M, R_HEADS
@@ -25,7 +27,7 @@ class _Coloring(Coloring):
 class Info(PagedCommand):
   common = True
   helpSummary = "Get info on the manifest branch, current branch or unmerged branches"
-  helpUsage = "%prog [-dl] [-o [-b]] [<project>...]"
+  helpUsage = "%prog [-dl] [-o [-c]] [<project>...]"
 
   def _Options(self, p):
     p.add_option('-d', '--diff',
@@ -34,9 +36,13 @@ class Info(PagedCommand):
     p.add_option('-o', '--overview',
                  dest='overview', action='store_true',
                  help='show overview of all local commits')
-    p.add_option('-b', '--current-branch',
+    p.add_option('-c', '--current-branch',
                  dest="current_branch", action="store_true",
                  help="consider only checked out branches")
+    # Turn this into a warning & remove this someday.
+    p.add_option('-b',
+                 dest='current_branch', action='store_true',
+                 help=optparse.SUPPRESS_HELP)
     p.add_option('-l', '--local-only',
                  dest="local", action="store_true",
                  help="Disable all remote operations")