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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
auto-auto-complete – Autogenerate shell auto-completion scripts
Copyright © 2012 Mattias Andrée (maandree@kth.se)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
'''
import sys
'''
Hack to enforce UTF-8 in output (in the future, if you see anypony not using utf-8 in
programs by default, report them to Princess Celestia so she can banish them to the moon)
@param text:str The text to print (empty string is default)
@param end:str The appendix to the text to print (line breaking is default)
'''
def print(text = '', end = '\n'):
sys.stdout.buffer.write((str(text) + end).encode('utf-8'))
'''
stderr equivalent to print()
@param text:str The text to print (empty string is default)
@param end:str The appendix to the text to print (line breaking is default)
'''
def printerr(text = '', end = '\n'):
sys.stderr.buffer.write((str(text) + end).encode('utf-8'))
'''
Bracket tree parser
'''
class Parser:
'''
Parse a code and return a tree
@param code:str The code to parse
@return :list<↑|str> The root node in the tree
'''
@staticmethod
def parse(code):
stack = []
stackptr = -1
comment = False
escape = False
quote = None
buf = None
for charindex in range(0, len(code)):
c = code[charindex]
if comment:
if c in '\n\r\f':
comment = False
elif escape:
escape = False
if c == 'a': buf += '\a'
elif c == 'b': buf += chr(8)
elif c == 'e': buf += '\033'
elif c == 'f': buf += '\f'
elif c == 'n': buf += '\n'
elif c == 'r': buf += '\r'
elif c == 't': buf += '\t'
elif c == 'v': buf += chr(11)
elif c == '0': buf += '\0'
else:
buf += c
elif c == quote:
quote = None
elif (c in ';#') and (quote is None):
if buf is not None:
stack[stackptr].append(buf)
buf = None
comment = True
elif (c == '(') and (quote is None):
if buf is not None:
stack[stackptr].append(buf)
buf = None
stackptr += 1
if stackptr == len(stack):
stack.append([])
else:
stack[stackptr] = []
elif (c == ')') and (quote is None):
if buf is not None:
stack[stackptr].append(buf)
buf = None
if stackptr == 0:
return stack[0]
stackptr -= 1
stack[stackptr].append(stack[stackptr + 1])
elif (c in ' \t\n\r\f') and (quote is None):
if buf is not None:
stack[stackptr].append(buf)
buf = None
else:
if buf is None:
buf = ''
if c == '\\':
escape = True
elif (c in '\'\"') and (quote is None):
quote = c
else:
buf += c
raise Exception('premature end of file')
'''
Simplifies a tree
@param tree:list<↑|str> The tree
'''
@staticmethod
def simplify(tree):
program = tree[0]
stack = [tree]
while len(stack) > 0:
node = stack.pop()
new = []
edited = False
for item in node:
if isinstance(item, list):
if item[0] == 'multiple':
master = item[1]
for slave in item[2:]:
new.append([master] + slave)
edited = True
elif item[0] == 'case':
for alt in item[1:]:
if alt[0] == program:
new.append(alt[1])
break
edited = True
else:
new.append(item)
else:
new.append(item)
if edited:
node[:] = new
for item in node:
if isinstance(item, list):
stack.append(item)
'''
mane!
'''
if __name__ == '__main__':
if len(sys.argv) != 6:
print("USAGE: auto-auto-complete SHELL --output OUTPUT_FILE --source SOURCE_FILE")
exit(1)
shell = sys.argv[1]
output = None
source = None
option = None
aliases = {'-o' : '--output',
'-f' : '--source', '--file' : '--source',
'-s' : '--source'}
def useopt(option, arg):
global source
global output
old = None
if option == '--output': old = output; output = arg
elif option == '--source': old = source; source = arg
else:
raise Exception('Unrecognised option: ' + option)
if old is not None:
raise Exception('Duplicate option: ' + option)
for arg in sys.argv[2:]:
if option is not None:
if option in aliases:
option = aliases[option]
useopt(option, arg)
option = None
else:
if '=' in arg:
useopt(arg[:index('=')], arg[index('=') + 1:])
else:
option = arg
if output is None: raise Exception('Unused option: --output')
if source is None: raise Exception('Unused option: --source')
with open(source, 'rb') as file:
source = file.read().decode('utf8', 'replace')
source = Parser.parse(source)
Parser.simplify(source)
print(source)
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