[Torque] format-torque.py accepts wildcards

Now you can type:
  tools/torque/format-torque.py -i src/builtins/*.tq

  to format all the torque files in a particular directory. Is handy.

Bug: v8:7793
Change-Id: I334b2c555c63fd7864636ebfd83a2631a5d44806
Reviewed-on: https://chromium-review.googlesource.com/c/1333671Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57479}

tools/torque/format-torque.py

@@ -81,35 +81,56 @@ def postprocess(output):
 
   return output
 
-if len(sys.argv) < 2 or len(sys.argv) > 3:
-  print "invalid number of arguments"
-  sys.exit(-1)
+def process(filename, only_lint, use_stdout):
+  with open(filename, 'r') as content_file:
+    content = content_file.read()
+
+  p = Popen(['clang-format', '-assume-filename=.ts'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
+  output, err = p.communicate(preprocess(content))
+  output = postprocess(output)
+  rc = p.returncode
+  if (rc <> 0):
+    print "error code " + str(rc) + " running clang-format. Exiting..."
+    sys.exit(rc);
+
+  if only_lint:
+    if (output != original_input):
+      print >>sys.stderr, filename + ' requires formatting'
+  elif use_stdout:
+    print output
+  else:
+    output_file = open(filename, 'w')
+    output_file.write(output);
+    output_file.close()
+
+def print_usage():
+  print 'format-torque -i file1[, file2[, ...]]'
+  print '    format and overwrite input files'
+  print 'format-torque -l file1[, file2[, ...]]'
+  print '    merely indicate which files need formatting'
+
+def Main():
+  if len(sys.argv) < 3:
+    print "error: at least 2 arguments required"
+    print_usage();
+    sys.exit(-1)
+
+  use_stdout = True
+  lint = False
 
-use_stdout = True
-lint = False
-if len(sys.argv) == 3:
   if sys.argv[1] == '-i':
     use_stdout = False
-  if sys.argv[1] == '-l':
+  elif sys.argv[1] == '-l':
     lint = True
+  else:
+    print "error: -i or -l must be specified as the first argument"
+    print_usage();
+    sys.exit(-1);
+
+  for filename in sys.argv[2:]:
+    process(filename, lint, use_stdout)
+
+  return 0
 
-filename = sys.argv[len(sys.argv) - 1]
-
-with open(filename, 'r') as content_file:
-  content = content_file.read()
-original_input = content
-p = Popen(['clang-format', '-assume-filename=.ts'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
-output, err = p.communicate(preprocess(content))
-output = postprocess(output)
-rc = p.returncode
-if (rc <> 0):
-  sys.exit(rc);
-if lint:
-  if (output != original_input):
-    print >>sys.stderr, filename + ' requires formatting'
-elif use_stdout:
-  print output
-else:
-  output_file = open(filename, 'w')
-  output_file.write(output);
-  output_file.close()
+if __name__ == '__main__':
+  sys.exit(Main());