Merge pull request #953 from ZyX-I/powerline-shell-help

Make powerline --help more useful

powerline/lint/__init__.py

@@ -1133,8 +1133,8 @@ theme_spec = (Spec(
 ).context_message('Error while loading theme'))
 
 
-def check(path=None, debug=False):
-	search_paths = [path] if path else get_config_paths()
+def check(paths=None, debug=False):
+	search_paths = paths or get_config_paths()
 	find_config_file = generate_config_finder(lambda: search_paths)
 
 	logger = logging.getLogger('powerline-lint')

powerline/shell.py

@@ -34,10 +34,7 @@ class ShellPowerline(Powerline):
 		return r
 
 	def get_config_paths(self):
-		if self.args.config_path:
-			return [self.args.config_path]
-		else:
-			return super(ShellPowerline, self).get_config_paths()
+		return self.args.config_path or super(ShellPowerline, self).get_config_paths()
 
 	def get_local_themes(self, local_themes):
 		if not local_themes:
@@ -52,17 +49,18 @@ def get_argparser(parser=None, *args, **kwargs):
 		import argparse
 		parser = argparse.ArgumentParser
 	p = parser(*args, **kwargs)
-	p.add_argument('ext', nargs=1)
-	p.add_argument('side', nargs='?', choices=('left', 'right', 'above', 'aboveleft'))
-	p.add_argument('-r', '--renderer_module', metavar='MODULE', type=str)
-	p.add_argument('-w', '--width', type=int)
-	p.add_argument('--last_exit_code', metavar='INT', type=int)
-	p.add_argument('--last_pipe_status', metavar='LIST', default='', type=lambda s: [int(status) for status in s.split()])
-	p.add_argument('--jobnum', metavar='INT', type=int)
-	p.add_argument('-c', '--config', metavar='KEY.KEY=VALUE', action='append')
-	p.add_argument('-t', '--theme_option', metavar='THEME.KEY.KEY=VALUE', action='append')
-	p.add_argument('-p', '--config_path', metavar='PATH')
-	p.add_argument('-R', '--renderer_arg', metavar='KEY=VAL', action='append')
+	p.add_argument('ext', nargs=1, help='Extension: application for which powerline command is launched (usually `shell\' or `tmux\')')
+	p.add_argument('side', nargs='?', choices=('left', 'right', 'above', 'aboveleft'), help='Side: `left\' and `right\' represent left and right side respectively, `above\' emits lines that are supposed to be printed just above the prompt and `aboveleft\' is like concatenating `above\' with `left\' with the exception that only one Python instance is used in this case.')
+	p.add_argument('-r', '--renderer_module', metavar='MODULE', type=str,
+				help='Renderer module. Usually something like `bash_prompt\' or `zsh_prompt\', is supposed to be set only in shell-specific bindings file.')
+	p.add_argument('-w', '--width', type=int, help='Maximum prompt with. Triggers truncation of some segments')
+	p.add_argument('--last_exit_code', metavar='INT', type=int, help='Last exit code')
+	p.add_argument('--last_pipe_status', metavar='LIST', default='', type=lambda s: [int(status) for status in s.split()], help='Like above, but is supposed to contain space-separated array of statuses, representing exit statuses of commands in one pipe.')
+	p.add_argument('--jobnum', metavar='INT', type=int, help='Number of jobs.')
+	p.add_argument('-c', '--config', metavar='KEY.KEY=VALUE', action='append', help='Configuration overrides for `config.json\'. Is translated to a dictionary and merged with the dictionary obtained from actual JSON configuration: KEY.KEY=VALUE is translated to `{"KEY": {"KEY": VALUE}}\' and then merged recursively. VALUE may be any JSON value, values that are not `null\', `true\', `false\', start with digit, `{\', `[\' are treated like strings. If VALUE is omitted then corresponding key is removed.')
+	p.add_argument('-t', '--theme_option', metavar='THEME.KEY.KEY=VALUE', action='append', help='Like above, but theme-specific. THEME should point to an existing and used theme to have any effect, but it is fine to use any theme here.')
+	p.add_argument('-R', '--renderer_arg', metavar='KEY=VAL', action='append', help='Like above, but provides argument for renderer. Is supposed to be used only by shell bindings to provide various data like last_exit_code or last_pipe_status (they are not using --renderer_arg for historical resons: renderer_arg was added later).')
+	p.add_argument('-p', '--config_path', action='append', metavar='PATH', help='Path to configuration directory. If it is present then configuration files will only be seeked in the provided path. May be provided multiple times to search in a list of directories.')
 	return p
 
 

scripts/powerline-lint

@@ -7,7 +7,7 @@ import sys
 
 
 parser = argparse.ArgumentParser(description=__doc__)
-parser.add_argument('-p', '--config_path', metavar='PATH')
+parser.add_argument('-p', '--config_path', action='append', metavar='PATH')
 parser.add_argument('-d', '--debug', action='store_const', const=True)
 
 if __name__ == '__main__':

tests/test_cmdline.py

@@ -90,7 +90,7 @@ class TestParser(TestCase):
 							}
 						}
 					},
-					'config_path': '.',
+					'config_path': ['.'],
 					'renderer_arg': {'smth': {'abc': 'def'}},
 				}),
 				(['shell', '-R', 'arg=true'], {'ext': ['shell'], 'renderer_arg': {'arg': True}}),