command_line: Allow arbitrary file types to be generated.

file_boilerplate/command_line.py

 #!/usr/bin/python3
 # -*- coding: utf-8 -*-
 #
-# Copyright (c) 2018 Collabora, Ltd.
+# Copyright (c) 2018-2019 Collabora, Ltd.
 #
 # SPDX-License-Identifier: BSL-1.0
 #
 # Author(s):    Ryan Pavlik <ryan.pavlik@collabora.com>
 #
-# Purpose:      Generates a .cpp and .h file with the given stem,
+# Purpose:      Generates code files (by default .cpp and .h) with the given stem,
 #               containing the expected default/boilerplate contents
 
 import argparse
 from file_boilerplate import BoilerplateRun
 from sys import exit
 
+
 def main():
     parser = argparse.ArgumentParser()
     parser.add_argument('stem', metavar='stem', nargs='?',
-                        help='Specify generated filename stem (.cpp and .h will be added)')
+                        help='Specify generated filename stem (file extensions.cpp and .h will be added)')
     parser.add_argument('--noh', action='store_true', default=False,
                         help='Skip generating the .h file')
     parser.add_argument('--nocpp', action='store_true', default=False,
                         help='Skip generating the .cpp file')
+    parser.add_argument('-t', '--type', action='append', default=[],
+                        help='Specify file types (nominally, extensions) to explicitly use.')
     parser.add_argument('-f', '--force', action='store_true', default=False,
                         help='Write file(s) even if already existing')
     args = parser.parse_args()
 
     success = True
     run = BoilerplateRun()
-    if not args.noh:
+    file_types = args.type
+    if not file_types:
+        if not args.noh:
+            file_types.append('h')
+        if not args.nocpp:
+            file_types.append('cpp')
+
+    for file_type in file_types:
         success = run.render(stem=args.stem,
-                             ext="h").write(force=args.force) and success
+                             ext=file_type).write(force=args.force) and success
 
-    if not args.nocpp:
-        success = run.render(ext='cpp',
-                             stem=args.stem).write(force=args.force) and success
     if success:
         exit()
     exit(-1)