161 lines
6.1 KiB
Python
161 lines
6.1 KiB
Python
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
#**************************************************************************
|
|
# Copyright (C) 2011, Paul Lutus *
|
|
# *
|
|
# 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 2 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, write to the *
|
|
# Free Software Foundation, Inc., *
|
|
# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
|
|
#**************************************************************************
|
|
|
|
import re, sys
|
|
|
|
PVERSION = '1.0'
|
|
|
|
class BeautifyBash:
|
|
|
|
def __init__(self):
|
|
self.tab_str = ' '
|
|
self.tab_size = 2
|
|
|
|
def read_file(self,fp):
|
|
with open(fp) as f:
|
|
return f.read()
|
|
|
|
def write_file(self,fp,data):
|
|
with open(fp,'w') as f:
|
|
f.write(data)
|
|
|
|
def beautify_string(self,data,path = ''):
|
|
tab = 0
|
|
case_stack = []
|
|
in_here_doc = False
|
|
defer_ext_quote = False
|
|
in_ext_quote = False
|
|
ext_quote_string = ''
|
|
here_string = ''
|
|
output = []
|
|
line = 1
|
|
for record in re.split('\n',data):
|
|
record = record.rstrip()
|
|
stripped_record = record.strip()
|
|
|
|
# collapse multiple quotes between ' ... '
|
|
test_record = re.sub(r'\'.*?\'','',stripped_record)
|
|
# collapse multiple quotes between " ... "
|
|
test_record = re.sub(r'".*?"','',test_record)
|
|
# collapse multiple quotes between ` ... `
|
|
test_record = re.sub(r'`.*?`','',test_record)
|
|
# collapse multiple quotes between \` ... ' (weird case)
|
|
test_record = re.sub(r'\\`.*?\'','',test_record)
|
|
# strip out any escaped single characters
|
|
test_record = re.sub(r'\\.','',test_record)
|
|
# remove '#' comments
|
|
test_record = re.sub(r'(\A|\s)(#.*)','',test_record,1)
|
|
if(not in_here_doc):
|
|
if(re.search('<<-?',test_record)):
|
|
here_string = re.sub('.*<<-?\s*[\'|"]?([_|\w]+)[\'|"]?.*','\\1',stripped_record,1)
|
|
in_here_doc = (len(here_string) > 0)
|
|
if(in_here_doc): # pass on with no changes
|
|
output.append(record)
|
|
# now test for here-doc termination string
|
|
if(re.search(here_string,test_record) and not re.search('<<',test_record)):
|
|
in_here_doc = False
|
|
else: # not in here doc
|
|
if(in_ext_quote):
|
|
if(re.search(ext_quote_string,test_record)):
|
|
# provide line after quotes
|
|
test_record = re.sub('.*%s(.*)' % ext_quote_string,'\\1',test_record,1)
|
|
in_ext_quote = False
|
|
else: # not in ext quote
|
|
if(re.search(r'(\A|\s)(\'|")',test_record)):
|
|
# apply only after this line has been processed
|
|
defer_ext_quote = True
|
|
ext_quote_string = re.sub('.*([\'"]).*','\\1',test_record,1)
|
|
# provide line before quote
|
|
test_record = re.sub('(.*)%s.*' % ext_quote_string,'\\1',test_record,1)
|
|
if(in_ext_quote):
|
|
# pass on unchanged
|
|
output.append(record)
|
|
else: # not in ext quote
|
|
inc = len(re.findall('(\s|\A|;)(case|then|do)(;|\Z|\s)',test_record))
|
|
inc += len(re.findall('(\{|\(|\[)',test_record))
|
|
outc = len(re.findall('(\s|\A|;)(esac|fi|done|elif)(;|\)|\||\Z|\s)',test_record))
|
|
outc += len(re.findall('(\}|\)|\])',test_record))
|
|
if(re.search(r'\besac\b',test_record)):
|
|
if(len(case_stack) == 0):
|
|
sys.stderr.write(
|
|
'File %s: error: "esac" before "case" in line %d.\n' % (path,line)
|
|
)
|
|
else:
|
|
outc += case_stack.pop()
|
|
# sepcial handling for bad syntax within case ... esac
|
|
if(len(case_stack) > 0):
|
|
if(re.search('\A[^(]*\)',test_record)):
|
|
# avoid overcount
|
|
outc -= 2
|
|
case_stack[-1] += 1
|
|
if(re.search(';;',test_record)):
|
|
outc += 1
|
|
case_stack[-1] -= 1
|
|
# an ad-hoc solution for the "else" keyword
|
|
else_case = (0,-1)[re.search('^(else)',test_record) != None]
|
|
net = inc - outc
|
|
tab += min(net,0)
|
|
extab = tab + else_case
|
|
extab = max(0,extab)
|
|
output.append((self.tab_str * self.tab_size * extab) + stripped_record)
|
|
tab += max(net,0)
|
|
if(defer_ext_quote):
|
|
in_ext_quote = True
|
|
defer_ext_quote = False
|
|
if(re.search(r'\bcase\b',test_record)):
|
|
case_stack.append(0)
|
|
line += 1
|
|
error = (tab != 0)
|
|
if(error):
|
|
sys.stderr.write('File %s: error: indent/outdent mismatch: %d.\n' % (path,tab))
|
|
return '\n'.join(output), error
|
|
|
|
def beautify_file(self,path):
|
|
error = False
|
|
if(path == '-'):
|
|
data = sys.stdin.read()
|
|
result,error = self.beautify_string(data,'(stdin)')
|
|
sys.stdout.write(result)
|
|
else: # named file
|
|
data = self.read_file(path)
|
|
result,error = self.beautify_string(data,path)
|
|
if(data != result):
|
|
# make a backup copy
|
|
self.write_file(path + '~',data)
|
|
self.write_file(path,result)
|
|
return error
|
|
|
|
def main(self):
|
|
error = False
|
|
sys.argv.pop(0)
|
|
if(len(sys.argv) < 1):
|
|
sys.stderr.write('usage: shell script filenames or \"-\" for stdin.\n')
|
|
else:
|
|
for path in sys.argv:
|
|
error |= self.beautify_file(path)
|
|
sys.exit((0,1)[error])
|
|
|
|
# if not called as a module
|
|
if(__name__ == '__main__'):
|
|
BeautifyBash().main()
|
|
|