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#!/usr/bin/env python
# -*- coding: UTF-8 -*-
# Parse getopt-style help texts for options
# and generate zsh(1) completion function.
# http://github.com/RobSis/zsh-completion-generator
# Usage: program --help | ./help2comp.py program_name
# Changelog:
# 9th September, 2014:
# - Copied from http://github.com/RobSis/zsh-completion-generator.
# - Print argument list instead of completion function.
import os
import sys
import re
import argparse
from string import Template
URL = 'http://github.com/RobSis/zsh-completion-generator'
STRIP_CHARS = " \t\n,="
COMPLETE_FUNCTION_TEMPLATE = """
#compdef $program_name
# zsh completions for '$program_name'
# automatically generated with $url
local arguments
arguments=(
$argument_list
'*:filename:_files'
)
_arguments -s $arguments
"""
ARGUMENT_TEMPLATE = """ {$opts}'[$description]$style'"""
SINGLE_ARGUMENT_TEMPLATE = """ '$opt[$description]$style'"""
def cut_option(line):
"""
Cuts out the first option (short or long) and its argument.
"""
# TODO: dare to make it regex-free?
newline = line.strip(STRIP_CHARS)
opt = re.findall(r'^(-[a-zA-Z0-9\-]+(?:[\[\ =][^\-\ ][a-zA-Z\<\>\[\|\:\]\-\_\?#]*\]?)?)', line)
if len(opt) > 0:
newline = line.replace(opt[0], "", 1).strip(STRIP_CHARS)
# return without parameter
return newline, re.split('[\ \[=]', opt[0])[0]
else:
return newline, None
def parse_options(help_text):
"""
Parses the options line by line.
When description is missing and options are missing on
consecutive line, link them together.
"""
all_options = []
previous_description_missing = False
for line in help_text:
line = line.strip(STRIP_CHARS)
if re.match(r'^--?[a-zA-Z0-9]+', line) != None: # starts with option
previous_description_missing = False
options = []
while True:
line, opt = cut_option(line)
if opt == None:
break
options.append(opt)
if (len(line) == 0):
previous_description_missing = True
options.append(line)
all_options.append(options)
elif previous_description_missing:
all_options[-1][-1] = line
previous_description_missing = False
return all_options
def _escape(line):
"""
Escape the syntax-breaking characters.
"""
line = line.replace('[','\[').replace(']','\]')
line = re.sub('\'', '', line) # ' is unescapable afaik
return line
def generate_argument_list(options):
"""
Generate list of arguments from the template.
"""
argument_list = []
for opts in options:
model = {}
# remove unescapable chars.
model['description'] = _escape(opts[-1])
model['style'] = ""
if (len(opts) > 2):
model['opts'] = ",".join(opts[:-1])
argument_list.append(Template(ARGUMENT_TEMPLATE).safe_substitute(model))
elif (len(opts) == 2):
model['opt'] = opts[0]
argument_list.append(Template(SINGLE_ARGUMENT_TEMPLATE).safe_substitute(model))
else:
pass
return "\n".join(argument_list)
def generate_completion_function(options, program_name):
"""
Generate completion function from the template.
"""
model = {}
model['program_name'] = program_name
model['argument_list'] = generate_argument_list(options)
model['url'] = URL
return Template(COMPLETE_FUNCTION_TEMPLATE).safe_substitute(model).strip()
if __name__ == "__main__":
if len(sys.argv) > 1:
options = parse_options(sys.stdin.readlines())
if (len(options) == 0):
sys.exit(2)
#print generate_completion_function(options, sys.argv[1])
print generate_argument_list(options)
else:
print "Please specify program name."
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