add --verbose to all commands.

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>

contrib/fast-import/git-p4

@@ -15,47 +15,47 @@ import re
 from sets import Set;
 
 gitdir = os.environ.get("GIT_DIR", "")
-silent = True
+verbose = False
 
 def write_pipe(c, str):
-    if not silent:
+    if verbose:
         sys.stderr.write('writing pipe: %s\n' % c)
 
     pipe = os.popen(c, 'w')
     val = pipe.write(str)
     if pipe.close():
-        sys.stderr.write('Command failed')
+        sys.stderr.write('Command %s failed\n' % c)
         sys.exit(1)
 
     return val
 
-def read_pipe(c):
-    if not silent:
+def read_pipe(c, ignore_error=False):
+    if verbose:
         sys.stderr.write('reading pipe: %s\n' % c)
 
     pipe = os.popen(c, 'rb')
     val = pipe.read()
-    if pipe.close():
-        sys.stderr.write('Command failed')
+    if pipe.close() and not ignore_error:
+        sys.stderr.write('Command %s failed\n' % c)
         sys.exit(1)
 
     return val
 
 
 def read_pipe_lines(c):
-    if not silent:
+    if verbose:
         sys.stderr.write('reading pipe: %s\n' % c)
     ## todo: check return status
     pipe = os.popen(c, 'rb')
     val = pipe.readlines()
     if pipe.close():
-        sys.stderr.write('Command failed')
+        sys.stderr.write('Command %s failed\n' % c)
         sys.exit(1)
 
     return val
 
 def system(cmd):
-    if not silent:
+    if verbose:
         sys.stderr.write("executing %s" % cmd)
     if os.system(cmd) != 0:
         die("command failed: %s" % cmd)
@@ -157,7 +157,7 @@ def gitBranchExists(branch):
     return proc.wait() == 0;
 
 def gitConfig(key):
-    return mypopen("git config %s" % key).read()[:-1]
+    return read_pipe("git config %s" % key, ignore_error=True).strip()
 
 class Command:
     def __init__(self):
@@ -168,7 +168,8 @@ class P4Debug(Command):
     def __init__(self):
         Command.__init__(self)
         self.options = [
-        ]
+            optparse.make_option("--verbose", dest="verbose", action="store_true"),
+            ]
         self.description = "A tool to debug the output of p4 -G."
         self.needsGit = False
 
@@ -234,6 +235,7 @@ class P4Submit(Command):
         Command.__init__(self)
         self.options = [
                 optparse.make_option("--continue", action="store_false", dest="firstTime"),
+                optparse.make_option("--verbose", dest="verbose", action="store_true"),
                 optparse.make_option("--origin", dest="origin"),
                 optparse.make_option("--reset", action="store_true", dest="reset"),
                 optparse.make_option("--log-substitutions", dest="substFile"),
@@ -861,11 +863,12 @@ class P4Sync(Command):
         if not self.silent:
             print "Creating/updating branch(es) in %s based on origin branch(es)" % self.refPrefix
 
-        for line in mypopen("git rev-parse --symbolic --remotes"):
+        for line in read_pipe_lines("git rev-parse --symbolic --remotes"):
+            line = line.strip()
             if (not line.startswith("origin/")) or line.endswith("HEAD\n"):
                 continue
 
-            headName = line[len("origin/"):-1]
+            headName = line[len("origin/")]
             remoteHead = self.refPrefix + headName
             originHead = "origin/" + headName
 
@@ -1292,6 +1295,7 @@ if len(options) > 0:
 
     (cmd, args) = parser.parse_args(sys.argv[2:], cmd);
 
+verbose = cmd.verbose
 if cmd.needsGit:
     gitdir = cmd.gitdir
     if len(gitdir) == 0: