[emrun] Use GNU command line flag names

For example `--no-browser` vs `--no_browser`.

Continue to support the old style but don't advertise these.

Author: sbc100

emrun.py

@@ -58,8 +58,8 @@
 # Stores the browser executable that was run with --browser= parameter.
 browser_exe = None
 
-# If we have routed browser output to file with --log_stdout and/or
-# --log_stderr, these track the handles.
+# If we have routed browser output to file with --log-stdout and/or
+# --log-stderr, these track the handles.
 browser_stdout_handle = sys.stdout
 browser_stderr_handle = sys.stderr
 
@@ -408,7 +408,7 @@ def kill_browser_process():
 # process that immediately exits.
 def detect_browser_processes():
   if not browser_exe:
-    return # Running with --no_browser, we are not binding to a spawned browser.
+    return # Running with --no-browser, we are not binding to a spawned browser.
 
   global current_browser_processes
   logv('First navigation occurred. Identifying currently running browser processes')
@@ -526,7 +526,7 @@ def serve_forever(self, timeout=0.5):
       time_since_message = now - last_message_time
       if emrun_options.silence_timeout != 0 and time_since_message > emrun_options.silence_timeout:
         self.shutdown()
-        logi('No activity in ' + str(emrun_options.silence_timeout) + ' seconds. Quitting web server with return code ' + str(emrun_options.timeout_returncode) + '. (--silence_timeout option)')
+        logi('No activity in ' + str(emrun_options.silence_timeout) + ' seconds. Quitting web server with return code ' + str(emrun_options.timeout_returncode) + '. (--silence-timeout option)')
         page_exit_code = emrun_options.timeout_returncode
         emrun_options.kill_exit = True
 
@@ -542,7 +542,7 @@ def serve_forever(self, timeout=0.5):
       if not emrun_not_enabled_nag_printed and page_last_served_time is not None:
         time_since_page_serve = now - page_last_served_time
         if not have_received_messages and time_since_page_serve > 10:
-          logv('The html page you are running is not emrun-capable. Stdout, stderr and exit(returncode) capture will not work. Recompile the application with the --emrun linker flag to enable this, or pass --no_emrun_detect to emrun to hide this check.')
+          logv('The html page you are running is not emrun-capable. Stdout, stderr and exit(returncode) capture will not work. Recompile the application with the --emrun linker flag to enable this, or pass --no-emrun-detect to emrun to hide this check.')
           emrun_not_enabled_nag_printed = True
 
     # Clean up at quit, print any leftover messages in queue.
@@ -703,7 +703,7 @@ def do_POST(self):
       elif data.startswith('^exit^'):
         if not emrun_options.serve_after_exit:
           page_exit_code = int(data[6:])
-          logv('Web page has quit with a call to exit() with return code ' + str(page_exit_code) + '. Shutting down web server. Pass --serve_after_exit to keep serving even after the page terminates with exit().')
+          logv('Web page has quit with a call to exit() with return code ' + str(page_exit_code) + '. Shutting down web server. Pass --serve-after-exit to keep serving even after the page terminates with exit().')
           self.server.shutdown()
           return
       else:
@@ -1155,7 +1155,7 @@ def win_get_default_browser():
   except WindowsError:
     logv("Unable to find default browser key in Windows registry. Trying fallback.")
 
-  # Fall back to 'start "" %1', which we have to treat as if user passed --serve_forever, since
+  # Fall back to 'start "" %1', which we have to treat as if user passed --serve-forever, since
   # for some reason, we are not able to detect when the browser closes when this is passed.
   #
   # If the first argument to 'start' is quoted, then 'start' will create a new cmd.exe window with
@@ -1444,44 +1444,44 @@ def list_processes_by_name(exe_full_path):
 """
 
 
-def parse_args():
+def parse_args(args):
   parser = argparse.ArgumentParser(usage=usage_str)
 
-  parser.add_argument('--kill_start', action='store_true',
+  parser.add_argument('--kill-start', action='store_true',
                       help='If true, any previously running instances of '
                            'the target browser are killed before starting.')
 
-  parser.add_argument('--kill_exit', action='store_true',
+  parser.add_argument('--kill-exit', action='store_true',
                       help='If true, the spawned browser process is forcibly '
                            'killed when it calls exit(). Note: Using this '
                            'option may require explicitly passing the option '
                            '--browser=/path/to/browser, to avoid emrun being '
                            'detached from the browser process it spawns.')
 
-  parser.add_argument('--no_server', dest='run_server', action='store_false',
+  parser.add_argument('--no-server', dest='run_server', action='store_false',
                       default=True,
                       help='If specified, a HTTP web server is not launched '
                            'to host the page to run.')
 
-  parser.add_argument('--no_browser', dest='run_browser', action='store_false',
+  parser.add_argument('--no-browser', dest='run_browser', action='store_false',
                       default=True,
                       help='If specified, emrun will not launch a web browser '
                            'to run the page.')
 
-  parser.add_argument('--no_emrun_detect', action='store_true',
+  parser.add_argument('--no-emrun-detect', action='store_true',
                       help='If specified, skips printing the warning message '
                            'if html page is detected to not have been built '
                            'with --emrun linker flag.')
 
-  parser.add_argument('--serve_after_close', action='store_true',
+  parser.add_argument('--serve-after-close', action='store_true',
                       help='If true, serves the web page even after the '
                            'application quits by user closing the web page.')
 
-  parser.add_argument('--serve_after_exit', action='store_true',
+  parser.add_argument('--serve-after-exit', action='store_true',
                       help='If true, serves the web page even after the '
                            'application quits by a call to exit().')
 
-  parser.add_argument('--serve_root',
+  parser.add_argument('--serve-root',
                       help='If set, specifies the root path that the emrun '
                            'web server serves. If not specified, the directory '
                            'where the target .html page lives in is served.')
@@ -1495,14 +1495,14 @@ def parse_args():
   parser.add_argument('--port', default=default_webserver_port, type=int,
                       help='Specifies the port the server runs in.')
 
-  parser.add_argument('--log_stdout',
+  parser.add_argument('--log-stdout',
                       help='Specifies a log filename where the browser process '
                            'stdout data will be appended to.')
 
-  parser.add_argument('--log_stderr',
+  parser.add_argument('--log-stderr',
                       help='Specifies a log filename where the browser process stderr data will be appended to.')
 
-  parser.add_argument('--silence_timeout', type=int, default=0,
+  parser.add_argument('--silence-timeout', type=int, default=0,
                       help='If no activity is received in this many seconds, '
                            'the browser process is assumed to be hung, and the web '
                            'server is shut down and the target browser killed.  '
@@ -1514,66 +1514,75 @@ def parse_args():
                            'to be hung, and the web server is shut down and the '
                            'target browser killed. Disabled by default.')
 
-  parser.add_argument('--timeout_returncode', type=int, default=99999,
+  parser.add_argument('--timeout-returncode', type=int, default=99999,
                       help='Sets the exit code that emrun reports back to '
                            'caller in the case that a page timeout occurs. '
                            'Default: 99999.')
 
-  parser.add_argument('--list_browsers', action='store_true',
+  parser.add_argument('--list-browsers', action='store_true',
                       help='Prints out all detected browser that emrun is able '
                            'to use with the --browser command and exits.')
 
   parser.add_argument('--browser',
                       help='Specifies the browser executable to run the web page in.')
 
-  parser.add_argument('--browser_args', default='',
+  parser.add_argument('--browser-args', default='',
                       help='Specifies the arguments to the browser executable.')
 
   parser.add_argument('--android', action='store_true',
                       help='Launches the page in a browser of an Android '
                            'device connected to an USB on the local system. (via adb)')
 
-  parser.add_argument('--android_tunnel', action='store_true',
+  parser.add_argument('--android-tunnel', action='store_true',
                       help='Expose the port directly to the Android device '
                            'and connect to it as localhost, establishing '
                            'cross origin isolation. Implies --android. A '
                            'reverse socket connection is created by adb '
                            'reverse, and remains after emrun terminates (it '
                            'can be removed by adb reverse --remove).')
 
-  parser.add_argument('--system_info', action='store_true',
+  parser.add_argument('--system-info', action='store_true',
                       help='Prints information about the current system at startup.')
 
-  parser.add_argument('--browser_info', action='store_true',
+  parser.add_argument('--browser-info', action='store_true',
                       help='Prints information about the target browser to launch at startup.')
 
   parser.add_argument('--json', action='store_true',
-                      help='If specified, --system_info and --browser_info are '
+                      help='If specified, --system-info and --browser-info are '
                            'outputted in JSON format.')
 
-  parser.add_argument('--safe_firefox_profile', action='store_true',
+  parser.add_argument('--safe-firefox-profile', action='store_true',
                       help='If true, the browser is launched into a new clean '
                            'Firefox profile that is suitable for unattended '
                            'automated runs. (If target browser != Firefox, '
                            'this parameter is ignored)')
 
-  parser.add_argument('--private_browsing', action='store_true',
+  parser.add_argument('--private-browsing', action='store_true',
                       help='If specified, opens browser in private/incognito mode.')
 
-  parser.add_argument('--dump_out_directory', default='dump_out', type=str,
+  parser.add_argument('--dump-out-directory', default='dump_out', type=str,
                       help='If specified, overrides the directory for dump files using emrun_file_dump method.')
 
   parser.add_argument('serve', nargs='?', default='')
 
   parser.add_argument('cmdlineparams', nargs='*')
 
-  return parser.parse_args()
+  # Support legacy argument names with `_` in them (but don't 
+  # advertize these in the --help message.
+  newargs = []
+  for a in args:
+    if a.startswith('--') and '_' in a:
+      newargs.append(a.replace('_', '-'))
+    else:
+      newargs.append(a)
+
+  return parser.parse_args(newargs)
 
 
-def run():
+def run(args):
   global browser_process, browser_exe, processname_killed_atexit, emrun_options, emrun_not_enabled_nag_printed
 
-  options = emrun_options = parse_args()
+  options = emrun_options = parse_args(args)
 
   if options.android_tunnel:
     options.android = True
@@ -1603,7 +1612,7 @@ def run():
     return
 
   if not options.serve and (options.system_info or options.browser_info):
-    # Don't run if only --system_info or --browser_info was passed.
+    # Don't run if only --system-info or --browser-info was passed.
     options.run_server = options.run_browser = False
 
   if not options.serve and (options.run_server or options.run_browser):
@@ -1659,7 +1668,7 @@ def run():
   if options.android:
     if options.run_browser or options.browser_info:
       if not options.browser:
-        loge("Running on Android requires that you explicitly specify the browser to run with --browser <id>. Run emrun --android --list_browsers to obtain a list of installed browsers you can use.")
+        loge("Running on Android requires that you explicitly specify the browser to run with --browser <id>. Run emrun --android --list-browsers to obtain a list of installed browsers you can use.")
         return 1
       elif options.browser == 'firefox':
         browser_app = 'org.mozilla.firefox/org.mozilla.gecko.BrowserApp'
@@ -1757,7 +1766,7 @@ def run(cmd):
       run(['adb', 'push', os.path.join(profile_dir, 'prefs.js'), '/mnt/sdcard/safe_firefox_profile/prefs.js'])
     except Exception as e:
       loge('Creating Firefox profile prefs.js file to internal storage in /mnt/sdcard failed with error ' + str(e) + '!')
-      loge('Try running without --safe_firefox_profile flag if unattended execution mode is not important, or')
+      loge('Try running without --safe-firefox-profile flag if unattended execution mode is not important, or')
       loge('enable rooted debugging on the Android device to allow adb to write files to /mnt/sdcard.')
     browser += ['--es', 'args', '"--profile /mnt/sdcard/safe_firefox_profile"']
 
@@ -1820,7 +1829,7 @@ def run(cmd):
     premature_quit_code = browser_process.poll()
     if premature_quit_code is not None:
       options.serve_after_close = True
-      logv('Warning: emrun got immediately detached from the target browser process (the process quit with exit code ' + str(premature_quit_code) + '). Cannot detect when user closes the browser. Behaving as if --serve_after_close was passed in.')
+      logv('Warning: emrun got immediately detached from the target browser process (the process quit with exit code ' + str(premature_quit_code) + '). Cannot detect when user closes the browser. Behaving as if --serve-after-close was passed in.')
       if not options.browser:
         logv('Try passing the --browser=/path/to/browser option to avoid this from occurring. See https://github.com/emscripten-core/emscripten/issues/3234 for more discussion.')
 
@@ -1838,7 +1847,7 @@ def run(cmd):
       kill_browser_process()
     else:
       if is_browser_process_alive():
-        logv('Not terminating browser process, pass --kill_exit to terminate the browser when it calls exit().')
+        logv('Not terminating browser process, pass --kill-exit to terminate the browser when it calls exit().')
       # If we have created a temporary Firefox profile, we would really really
       # like to wait until the browser closes, or otherwise we'll just have to
       # litter temp files and keep the temporary profile alive. It is possible
@@ -1855,13 +1864,13 @@ def run(cmd):
   return page_exit_code
 
 
-def main():
-  returncode = run()
+def main(args):
+  returncode = run(args)
   logv('emrun quitting with process exit code ' + str(returncode))
   if temp_firefox_profile_dir is not None:
-    logi('Warning: Had to leave behind a temporary Firefox profile directory ' + temp_firefox_profile_dir + ' because --safe_firefox_profile was set and the browser did not quit before emrun did.')
+    logi('Warning: Had to leave behind a temporary Firefox profile directory ' + temp_firefox_profile_dir + ' because --safe-firefox-profile was set and the browser did not quit before emrun did.')
   return returncode
 
 
 if __name__ == '__main__':
-  sys.exit(main())
+  sys.exit(main(sys.argv[1:]))

test/test_browser.py

@@ -5844,22 +5844,22 @@ class emrun(RunnerCore):
   def test_emrun_info(self):
     if not has_browser():
       self.skipTest('need a browser')
-    result = self.run_process([EMRUN, '--system_info', '--browser_info'], stdout=PIPE).stdout
+    result = self.run_process([EMRUN, '--system-info', '--browser_info'], stdout=PIPE).stdout
     assert 'CPU' in result
     assert 'Browser' in result
     assert 'Traceback' not in result
 
-    result = self.run_process([EMRUN, '--list_browsers'], stdout=PIPE).stdout
+    result = self.run_process([EMRUN, '--list-browsers'], stdout=PIPE).stdout
     assert 'Traceback' not in result
 
   def test_no_browser(self):
-    # Test --no_browser mode where we have to take care of launching the browser ourselves
+    # Test --no-browser mode where we have to take care of launching the browser ourselves
     # and then killing emrun when we are done.
     if not has_browser():
       self.skipTest('need a browser')
 
     self.run_process([EMCC, test_file('test_emrun.c'), '--emrun', '-o', 'hello_world.html'])
-    proc = subprocess.Popen([EMRUN, '--no_browser', '.', '--port=3333'], stdout=PIPE)
+    proc = subprocess.Popen([EMRUN, '--no-browser', '.', '--port=3333'], stdout=PIPE)
     try:
       if EMTEST_BROWSER:
         print('Starting browser')
@@ -5891,9 +5891,9 @@ def test_emrun(self):
 
     os.chdir(path_from_root())
     args_base = [EMRUN, '--timeout', '30', '--safe_firefox_profile',
-                 '--kill_exit', '--port', '6939', '--verbose',
-                 '--log_stdout', self.in_dir('stdout.txt'),
-                 '--log_stderr', self.in_dir('stderr.txt')]
+                 '--kill-exit', '--port', '6939', '--verbose',
+                 '--log-stdout', self.in_dir('stdout.txt'),
+                 '--log-stderr', self.in_dir('stderr.txt')]
 
     # Verify that trying to pass argument to the page without the `--` separator will
     # generate an actionable error message