git-p4: add --no-verify option

Add new command line option --no-verify:

Add a new command line option "--no-verify" to the Submit command of
git-p4.py.  This option will function in the spirit of the existing
--no-verify command line option found in git commit. It will cause the
P4 Submit function to ignore the existing p4-pre-submit.

Change the execution of the existing trigger p4-pre-submit to honor the
--no-verify option. Before exiting on failure of this hook, display
text to the user explaining which hook has failed and the impact
of using the --no-verify option.

Change the call of the p4-pre-submit hook to use the new run_git_hook
function. This is in preparation of additional hooks to be added.

Signed-off-by: Ben Keene <seraphire@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-p4.txt

@@ -374,14 +374,20 @@ These options can be used to modify 'git p4 submit' behavior.
     been submitted. Implies --disable-rebase. Can also be set with
     git-p4.disableP4Sync. Sync with origin/master still goes ahead if possible.
 
-Hook for submit
-~~~~~~~~~~~~~~~
+Hooks for submit
+----------------
+
+p4-pre-submit
+~~~~~~~~~~~~~
+
 The `p4-pre-submit` hook is executed if it exists and is executable.
 The hook takes no parameters and nothing from standard input. Exiting with
 non-zero status from this script prevents `git-p4 submit` from launching.
+It can be bypassed with the `--no-verify` command line option.
 
 One usage scenario is to run unit tests in the hook.
 
+
 Rebase options
 ~~~~~~~~~~~~~~
 These options can be used to modify 'git p4 rebase' behavior.

Documentation/githooks.txt

@@ -520,7 +520,10 @@ p4-pre-submit
 
 This hook is invoked by `git-p4 submit`. It takes no parameters and nothing
 from standard input. Exiting with non-zero status from this script prevent
-`git-p4 submit` from launching. Run `git-p4 submit --help` for details.
+`git-p4 submit` from launching. It can be bypassed with the `--no-verify`
+command line option. Run `git-p4 submit --help` for details.
+
+
 
 post-index-change
 ~~~~~~~~~~~~~~~~~

git-p4.py

@@ -1588,13 +1588,17 @@ class P4Submit(Command, P4UserMap):
                                      "work from a local git branch that is not master"),
                 optparse.make_option("--disable-p4sync", dest="disable_p4sync", action="store_true",
                                      help="Skip Perforce sync of p4/master after submit or shelve"),
+                optparse.make_option("--no-verify", dest="no_verify", action="store_true",
+                                     help="Bypass p4-pre-submit"),
         ]
         self.description = """Submit changes from git to the perforce depot.\n
-    The `p4-pre-submit` hook is executed if it exists and is executable.
-    The hook takes no parameters and nothing from standard input. Exiting with
-    non-zero status from this script prevents `git-p4 submit` from launching.
+    The `p4-pre-submit` hook is executed if it exists and is executable. It
+    can be bypassed with the `--no-verify` command line option. The hook takes
+    no parameters and nothing from standard input. Exiting with a non-zero status
+    from this script prevents `git-p4 submit` from launching.
 
-    One usage scenario is to run unit tests in the hook."""
+    One usage scenario is to run unit tests in the hook.
+    """
 
         self.usage += " [name of git branch to submit into perforce depot]"
         self.origin = ""
@@ -1612,6 +1616,7 @@ class P4Submit(Command, P4UserMap):
         self.exportLabels = False
         self.p4HasMoveCommand = p4_has_move_command()
         self.branch = None
+        self.no_verify = False
 
         if gitConfig('git-p4.largeFileSystem'):
             die("Large file system not supported for git-p4 submit command. Please remove it from config.")
@@ -2405,16 +2410,17 @@ class P4Submit(Command, P4UserMap):
             sys.exit("number of commits (%d) must match number of shelved changelist (%d)" %
                      (len(commits), num_shelves))
 
-        try:
-            if not run_git_hook("p4-pre-submit"):
-                print("\nThe p4-pre-submit hook failed, aborting the submit.\n\nYou can skip " \
-                    "this pre-submission check by adding\nthe command line option '--no-verify', " \
-                    "however,\nthis will also skip the p4-changelist hook as well.")
+        if not self.no_verify:
+            try:
+                if not run_git_hook("p4-pre-submit"):
+                    print("\nThe p4-pre-submit hook failed, aborting the submit.\n\nYou can skip " \
+                        "this pre-submission check by adding\nthe command line option '--no-verify', " \
+                        "however,\nthis will also skip the p4-changelist hook as well.")
+                    sys.exit(1)
+            except Exception as e:
+                print("\nThe p4-pre-submit hook failed, aborting the submit.\n\nThe hook failed "\
+                    "with the error '{0}'".format(e.message) )
                 sys.exit(1)
-        except Exception as e:
-            print("\nThe p4-pre-submit hook failed, aborting the submit.\n\nThe hook failed "\
-                "with the error '{0}'".format(e.message) )
-            sys.exit(1)
 
         #
         # Apply the commits, one at a time.  On failure, ask if should