156 lines
4.8 KiB
Python
Executable File
156 lines
4.8 KiB
Python
Executable File
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import getopt
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import sys
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import search
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def show_book_or_person(ids, commit_format=False, tmp_file=False):
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pass
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# def search_book():
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# pass
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def search_person():
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pass
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def commit(filename=None):
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pass
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def edit_book_or_person(ids):
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filename = show_book_or_person(ids, commit_format=True, tmp_file=True)
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# run_editor(filename)
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commit(filename)
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commands = { 'show':
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{ 'args': [('ids', (1,None))],
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'options': ['commit_format', 'tmp_file'],
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'fun': show_book_or_person },
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'search':
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{ 'args': [('search_strings', (1,None))],
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'options': ['search_description'],
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'fun': search.search_book_cmd },
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'search-person':
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{ 'args': [('search_strings', (1,None))],
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'options': [],
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'fun': search_person },
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'commit':
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{ 'args': [('filename', (0,1))],
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'options': [],
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'fun': commit },
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'edit':
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{ 'args': [('ids', (1,None))],
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'options': [],
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'fun': edit_book_or_person }
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}
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flags = { 'commit_format':
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{ 'help': 'output data in the format expected by the commit command' },
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'tmp_file':
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{ 'help': 'output data to a new temporary file instead of to stdout' },
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'search_description':
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{ 'help': 'include description field when searching' }
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}
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general_options = [] # options applicable to all commands
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class BadCommandLine(Exception):
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def __init__(self, msg):
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Exception.__init__(self, 'Bad command line: ' + msg)
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def check_command_args(args, command):
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cmd_decl = commands[command]
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min_num_args = sum(map(lambda a: a[1][0], cmd_decl['args']))
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unlimited = any(map(lambda a: a[1][1] == None, cmd_decl['args']))
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if not unlimited:
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max_num_args = sum(map(lambda a: a[1][1], cmd_decl['args']))
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if len(args) < min_num_args:
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raise BadCommandLine('Too few arguments for command %s (expects at least %d, %d given).'
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% (command, min_num_args, len(args)))
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if (not unlimited) and (len(args) < max_num_args):
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raise BadCommandLine('Too many arguments for command %s (expects at most %d, %d given).'
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% (command, max_num_args, len(args)))
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def check_command_opts(opts, command):
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cmd_decl = commands[command]
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for opt,val in opts:
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if ((opt not in cmd_decl['options']) and
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(opt not in general_options)):
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raise BadCommandLine('Option %s not applicable to command %s.'
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% (opt, command))
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def assign_command_args(args, command):
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cmd_decl = commands[command]
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d = {}
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i = 0
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for param in cmd_decl['args']:
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pname = param[0]
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pmin = param[1][0]
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pmax = param[1][1]
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if pmax == 1:
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if i < len(args):
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d[pname] = args[i]
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i += 1
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else:
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d[pname] = None
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else:
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d[pname] = []
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j = 0
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while i + j < len(args) and (pmax == None or j < pmax):
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d[pname].append(args[i + j])
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j += 1
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i = i + j
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return d
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def assign_command_opts(opts, command):
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d = {}
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for option, value in opts:
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if option in flags:
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d[option] = True
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else:
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d[option] = value
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return d
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def parse_cmdline(args):
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def getopt_option_name(internal_name):
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return internal_name.replace('_', '-')
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def internal_option_name(getopt_ret_name):
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return getopt_ret_name[2:].replace('-', '_')
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option_names = map(getopt_option_name, flags)
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options, args = getopt.getopt(args, '', option_names)
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if len(args) == 0:
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raise BadCommandLine('No command specified.')
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cmd_name = args[0]
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if cmd_name not in commands:
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raise BadCommandLine('Nonexisting command %s.' % cmd_name)
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cmd_decl = commands[cmd_name]
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cmd_args = args[1:]
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cmd_opts = map(lambda (opt,val): (internal_option_name(opt), val),
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options)
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check_command_args(cmd_args, cmd_name)
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check_command_opts(cmd_opts, cmd_name)
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return { 'command': cmd_name,
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'args': combine_dicts(assign_command_args(cmd_args, cmd_name),
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assign_command_opts(cmd_opts, cmd_name)) }
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def invoke_command(command, args):
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cmd_decl = commands[command]
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cmd_decl['fun'](**args)
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def combine_dicts(*dicts):
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res = {}
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for d in dicts:
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res.update(d)
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return res
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cmdline_parsed = parse_cmdline(sys.argv[1:])
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print 'command line parsed to:', cmdline_parsed
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invoke_command(cmdline_parsed['command'],
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cmdline_parsed['args'])
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