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110 lines
3.8 KiB
Python
110 lines
3.8 KiB
Python
#!/usr/bin/python
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#
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# Simple utility script to manipulate
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# certain types of strings in a file
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# This can be used in various projects where
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# there is the need to replace strings in files,
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# and is copied from GLib's $(srcroot)/win32
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# Author: Fan, Chun-wei
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# Date: September 03, 2014
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import os
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import sys
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import re
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import string
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import argparse
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valid_actions = ['remove-prefix',
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'replace-var',
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'replace-str',
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'remove-str']
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def replace_multi(src, dest, replace_items):
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with open(src, 'r') as s:
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with open(dest, 'w') as d:
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for line in s:
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replace_dict = dict((re.escape(key), value) \
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for key, value in replace_items.items())
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replace_pattern = re.compile("|".join(replace_dict.keys()))
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d.write(replace_pattern.sub(lambda m: \
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replace_dict[re.escape(m.group(0))], line))
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def replace(src, dest, instring, outstring):
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replace_item = {instring: outstring}
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replace_multi(src, dest, replace_item)
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def check_required_args(args, params):
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for param in params:
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if getattr(args, param, None) is None:
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raise SystemExit('%s: error: --%s argument is required' % (__file__, param))
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def warn_ignored_args(args, params):
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for param in params:
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if getattr(args, param, None) is not None:
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print('%s: warning: --%s argument is ignored' % (__file__, param))
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def main(argv):
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parser = argparse.ArgumentParser(description='Process strings in a file.')
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parser.add_argument('-a',
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'--action',
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help='Action to carry out. Can be one of:\n'
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'remove-prefix\n'
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'replace-var\n'
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'replace-str\n'
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'remove-str',
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choices=valid_actions)
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parser.add_argument('-i', '--input', help='Input file')
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parser.add_argument('-o', '--output', help='Output file')
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parser.add_argument('--instring', help='String to replace or remove')
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parser.add_argument('--var', help='Autotools variable name to replace')
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parser.add_argument('--outstring',
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help='New String to replace specified string or variable')
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parser.add_argument('--removeprefix', help='Prefix of string to remove')
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args = parser.parse_args()
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input_string = ''
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output_string = ''
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# We must have action, input, output for all operations
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check_required_args(args, ['action','input','output'])
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# Build the arguments by the operation that is to be done,
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# to be fed into replace()
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# Get rid of prefixes from a string
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if args.action == 'remove-prefix':
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check_required_args(args, ['instring','removeprefix'])
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warn_ignored_args(args, ['outstring','var'])
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input_string = args.removeprefix + args.instring
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output_string = args.instring
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# Replace an m4-style variable (those surrounded by @...@)
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if args.action == 'replace-var':
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check_required_args(args, ['var','outstring'])
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warn_ignored_args(args, ['instring','removeprefix'])
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input_string = '@' + args.var + '@'
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output_string = args.outstring
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# Replace a string
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if args.action == 'replace-str':
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check_required_args(args, ['instring','outstring'])
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warn_ignored_args(args, ['var','removeprefix'])
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input_string = args.instring
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output_string = args.outstring
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# Remove a string
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if args.action == 'remove-str':
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check_required_args(args, ['instring'])
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warn_ignored_args(args, ['var','outstring','removeprefix'])
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input_string = args.instring
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output_string = ''
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replace(args.input, args.output, input_string, output_string)
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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