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'''dpm command line interface.
See dpm help for details.
'''
import os
import sys
import pkg_resources
from base import Command, parser
_commands = {}
## Need this command in here as it uses the list of commands
class HelpCommand(Command):
name = 'help'
usage = '%prog'
summary = 'Show available commands'
general_usage = \
'''%prog [options] <command>
For an introduction to dpm see the manual:
$ datapm man
About information (including license details) is available via `datapm about`.
'''
def run(self, options, args):
if args:
## FIXME: handle errors better here
command = args[0]
if command not in _commands:
raise Exception('No command with the name: %s' % command)
command = _commands[command]
command.parser.print_help()
return
print self.general_usage
print 'Commands available:'
commands = list(set(_commands.keys()))
commands.sort()
for command in commands:
print ' %s: %s' % (command, _commands[command].summary)
import pkg_resources
for entry_point in pkg_resources.iter_entry_points('dpm.cli'):
cmd = entry_point.load()
cmdinstance = cmd()
_commands[entry_point.name] = cmdinstance
def main(initial_args=None):
if initial_args is None:
initial_args = sys.argv[1:]
options, args = parser.parse_args(initial_args)
if not args:
parser.error('You must give a command (use "datapm help" see a list of commands)')
command = args[0].lower()
if command not in _commands:
parser.error('No command by the name %s %s' % (os.path.basename(sys.argv[0]), command))
command = _commands[command]
command.main(initial_args, args[1:], options)
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