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- """ Command line interface to difflib.py providing diffs in three 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.
-
- """
-
- import sys, os, time, difflib, optparse
-
- usage = "usage: %prog [options] fromfile tofile"
- parser = optparse.OptionParser(usage)
- parser.add_option("-c", action="store_true", default=False, help='Produce a context format diff (default)')
- parser.add_option("-u", action="store_true", default=False, help='Produce a unified format diff')
- parser.add_option("-n", action="store_true", default=False, help='Produce a ndiff format diff')
- parser.add_option("-l", "--lines", type="int", default=3, help='Set number of context lines (default 3)')
- (options, args) = parser.parse_args()
-
- if len(args) == 0:
- parser.print_help()
- sys.exit(1)
- if len(args) != 2:
- parser.error("need to specify both a fromfile and tofile")
-
- n = options.lines
- fromfile, tofile = args
-
- fromdate = time.ctime(os.stat(fromfile).st_mtime)
- todate = time.ctime(os.stat(tofile).st_mtime)
- fromlines = open(fromfile).readlines()
- tolines = open(tofile).readlines()
-
- if options.u:
- diff = difflib.unified_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n)
- elif options.n:
- diff = difflib.ndiff(fromlines, tolines)
- else:
- diff = difflib.context_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n)
-
- sys.stdout.writelines(diff)
-
-