Python code coverage for Tools/scripts/ndiff.py

#	count	content
1	n/a	#! /usr/bin/env python3
2	n/a
3	n/a	# Module ndiff version 1.7.0
4	n/a	# Released to the public domain 08-Dec-2000,
5	n/a	# by Tim Peters (tim.one@home.com).
6	n/a
7	n/a	# Provided as-is; use at your own risk; no warranty; no promises; enjoy!
8	n/a
9	n/a	# ndiff.py is now simply a front-end to the difflib.ndiff() function.
10	n/a	# Originally, it contained the difflib.SequenceMatcher class as well.
11	n/a	# This completes the raiding of reusable code from this formerly
12	n/a	# self-contained script.
13	n/a
14	n/a	"""ndiff [-q] file1 file2
15	n/a	or
16	n/a	ndiff (-r1 \| -r2) < ndiff_output > file1_or_file2
17	n/a
18	n/a	Print a human-friendly file difference report to stdout. Both inter-
19	n/a	and intra-line differences are noted. In the second form, recreate file1
20	n/a	(-r1) or file2 (-r2) on stdout, from an ndiff report on stdin.
21	n/a
22	n/a	In the first form, if -q ("quiet") is not specified, the first two lines
23	n/a	of output are
24	n/a
25	n/a	-: file1
26	n/a	+: file2
27	n/a
28	n/a	Each remaining line begins with a two-letter code:
29	n/a
30	n/a	"- " line unique to file1
31	n/a	"+ " line unique to file2
32	n/a	" " line common to both files
33	n/a	"? " line not present in either input file
34	n/a
35	n/a	Lines beginning with "? " attempt to guide the eye to intraline
36	n/a	differences, and were not present in either input file. These lines can be
37	n/a	confusing if the source files contain tab characters.
38	n/a
39	n/a	The first file can be recovered by retaining only lines that begin with
40	n/a	" " or "- ", and deleting those 2-character prefixes; use ndiff with -r1.
41	n/a
42	n/a	The second file can be recovered similarly, but by retaining only " " and
43	n/a	"+ " lines; use ndiff with -r2; or, on Unix, the second file can be
44	n/a	recovered by piping the output through
45	n/a
46	n/a	sed -n '/^[+ ] /s/^..//p'
47	n/a	"""
48	n/a
49	n/a	__version__ = 1, 7, 0
50	n/a
51	n/a	import difflib, sys
52	n/a
53	n/a	def fail(msg):
54	n/a	out = sys.stderr.write
55	n/a	out(msg + "\n\n")
56	n/a	out(__doc__)
57	n/a	return 0
58	n/a
59	n/a	# open a file & return the file object; gripe and return 0 if it
60	n/a	# couldn't be opened
61	n/a	def fopen(fname):
62	n/a	try:
63	n/a	return open(fname)
64	n/a	except IOError as detail:
65	n/a	return fail("couldn't open " + fname + ": " + str(detail))
66	n/a
67	n/a	# open two files & spray the diff to stdout; return false iff a problem
68	n/a	def fcompare(f1name, f2name):
69	n/a	f1 = fopen(f1name)
70	n/a	f2 = fopen(f2name)
71	n/a	if not f1 or not f2:
72	n/a	return 0
73	n/a
74	n/a	a = f1.readlines(); f1.close()
75	n/a	b = f2.readlines(); f2.close()
76	n/a	for line in difflib.ndiff(a, b):
77	n/a	print(line, end=' ')
78	n/a
79	n/a	return 1
80	n/a
81	n/a	# crack args (sys.argv[1:] is normal) & compare;
82	n/a	# return false iff a problem
83	n/a
84	n/a	def main(args):
85	n/a	import getopt
86	n/a	try:
87	n/a	opts, args = getopt.getopt(args, "qr:")
88	n/a	except getopt.error as detail:
89	n/a	return fail(str(detail))
90	n/a	noisy = 1
91	n/a	qseen = rseen = 0
92	n/a	for opt, val in opts:
93	n/a	if opt == "-q":
94	n/a	qseen = 1
95	n/a	noisy = 0
96	n/a	elif opt == "-r":
97	n/a	rseen = 1
98	n/a	whichfile = val
99	n/a	if qseen and rseen:
100	n/a	return fail("can't specify both -q and -r")
101	n/a	if rseen:
102	n/a	if args:
103	n/a	return fail("no args allowed with -r option")
104	n/a	if whichfile in ("1", "2"):
105	n/a	restore(whichfile)
106	n/a	return 1
107	n/a	return fail("-r value must be 1 or 2")
108	n/a	if len(args) != 2:
109	n/a	return fail("need 2 filename args")
110	n/a	f1name, f2name = args
111	n/a	if noisy:
112	n/a	print('-:', f1name)
113	n/a	print('+:', f2name)
114	n/a	return fcompare(f1name, f2name)
115	n/a
116	n/a	# read ndiff output from stdin, and print file1 (which=='1') or
117	n/a	# file2 (which=='2') to stdout
118	n/a
119	n/a	def restore(which):
120	n/a	restored = difflib.restore(sys.stdin.readlines(), which)
121	n/a	sys.stdout.writelines(restored)
122	n/a
123	n/a	if __name__ == '__main__':
124	n/a	args = sys.argv[1:]
125	n/a	if "-profile" in args:
126	n/a	import profile, pstats
127	n/a	args.remove("-profile")
128	n/a	statf = "ndiff.pro"
129	n/a	profile.run("main(args)", statf)
130	n/a	stats = pstats.Stats(statf)
131	n/a	stats.strip_dirs().sort_stats('time').print_stats()
132	n/a	else:
133	n/a	main(args)