| |
| """ Command line interface to difflib.py providing diffs in four formats: |
| |
| * ndiff: lists every line and highlights interline changes. |
| * context: highlights clusters of changes in a before/after format. |
| * unified: highlights clusters of changes in an inline format. |
| * html: generates side by side comparison with change highlights. |
| |
| """ |
|
|
| import sys, os, difflib, argparse |
| from datetime import datetime, timezone |
|
|
| def file_mtime(path): |
| t = datetime.fromtimestamp(os.stat(path).st_mtime, |
| timezone.utc) |
| return t.astimezone().isoformat() |
|
|
| def main(): |
|
|
| parser = argparse.ArgumentParser() |
| parser.add_argument('-c', action='store_true', default=False, |
| help='Produce a context format diff (default)') |
| parser.add_argument('-u', action='store_true', default=False, |
| help='Produce a unified format diff') |
| parser.add_argument('-m', action='store_true', default=False, |
| help='Produce HTML side by side diff ' |
| '(can use -c and -l in conjunction)') |
| parser.add_argument('-n', action='store_true', default=False, |
| help='Produce a ndiff format diff') |
| parser.add_argument('-l', '--lines', type=int, default=3, |
| help='Set number of context lines (default 3)') |
| parser.add_argument('fromfile') |
| parser.add_argument('tofile') |
| options = parser.parse_args() |
|
|
| n = options.lines |
| fromfile = options.fromfile |
| tofile = options.tofile |
|
|
| fromdate = file_mtime(fromfile) |
| todate = file_mtime(tofile) |
| with open(fromfile) as ff: |
| fromlines = ff.readlines() |
| with open(tofile) as tf: |
| tolines = tf.readlines() |
|
|
| if options.u: |
| diff = difflib.unified_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n) |
| elif options.n: |
| diff = difflib.ndiff(fromlines, tolines) |
| elif options.m: |
| diff = difflib.HtmlDiff().make_file(fromlines,tolines,fromfile,tofile,context=options.c,numlines=n) |
| else: |
| diff = difflib.context_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n) |
|
|
| sys.stdout.writelines(diff) |
|
|
| if __name__ == '__main__': |
| main() |
|
|
