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76 lines
2.0 KiB
76 lines
2.0 KiB
#!/usr/bin/env python
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from __future__ import print_function, unicode_literals
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import argparse
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import os
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import re
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import sys
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DESCRIPTION = """\
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Migrate arbitrary `.go` sources from the pre-v2.0.0 API for StringSlice and
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IntSlice types, optionally writing the changes back to file.
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"""
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SLICE_TYPE_RE = re.compile(
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'&cli\\.(?P<type>IntSlice|StringSlice){(?P<args>[^}]*)}',
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flags=re.DOTALL
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)
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def main(sysargs=sys.argv[:]):
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parser = argparse.ArgumentParser(
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description=DESCRIPTION,
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formatter_class=argparse.ArgumentDefaultsHelpFormatter)
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parser.add_argument('basedir', nargs='?', metavar='BASEDIR',
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type=os.path.abspath, default=os.getcwd())
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parser.add_argument('-w', '--write', help='write changes back to file',
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action='store_true', default=False)
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args = parser.parse_args(sysargs[1:])
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for filepath in _find_candidate_files(args.basedir):
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updated_source = _update_source(filepath)
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if args.write:
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print('Updating {!r}'.format(filepath))
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with open(filepath, 'w') as outfile:
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outfile.write(updated_source)
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else:
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print('// -> Updated {!r}'.format(filepath))
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print(updated_source)
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return 0
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def _update_source(filepath):
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with open(filepath) as infile:
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source = infile.read()
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return SLICE_TYPE_RE.sub(_slice_type_repl, source)
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def _slice_type_repl(match):
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return 'cli.New{}({})'.format(
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match.groupdict()['type'], match.groupdict()['args']
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)
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def _find_candidate_files(basedir):
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for curdir, dirs, files in os.walk(basedir):
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for i, dirname in enumerate(dirs[:]):
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if dirname.startswith('.'):
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dirs.pop(i)
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for filename in files:
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if not filename.endswith('.go'):
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continue
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filepath = os.path.join(curdir, filename)
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if not os.access(filepath, os.R_OK | os.W_OK):
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continue
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yield filepath
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if __name__ == '__main__':
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sys.exit(main())
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