1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
# Module 'dirmp'
#
# Defines a class to build directory diff tools on.
import posix
import path
import dircache
import cmpcache
import statcache
from stat import *
# Directory comparison class.
#
class dircmp:
#
def new(dd, (a, b)): # Initialize
dd.a = a
dd.b = b
# Properties that caller may change before callingdd. run():
dd.hide = ['.', '..'] # Names never to be shown
dd.ignore = ['RCS', 'tags'] # Names ignored in comparison
#
return dd
#
def run(dd): # Compare everything except common subdirectories
dd.a_list = filter(dircache.listdir(dd.a), dd.hide)
dd.b_list = filter(dircache.listdir(dd.b), dd.hide)
dd.a_list.sort()
dd.b_list.sort()
dd.phase1()
dd.phase2()
dd.phase3()
#
def phase1(dd): # Compute common names
dd.a_only = []
dd.common = []
for x in dd.a_list:
if x in dd.b_list:
dd.common.append(x)
else:
dd.a_only.append(x)
#
dd.b_only = []
for x in dd.b_list:
if x not in dd.common:
dd.b_only.append(x)
#
def phase2(dd): # Distinguish files, directories, funnies
dd.common_dirs = []
dd.common_files = []
dd.common_funny = []
#
for x in dd.common:
a_path = path.join(dd.a, x)
b_path = path.join(dd.b, x)
#
ok = 1
try:
a_stat = statcache.stat(a_path)
except posix.error, why:
# print 'Can\'t stat', a_path, ':', why[1]
ok = 0
try:
b_stat = statcache.stat(b_path)
except posix.error, why:
# print 'Can\'t stat', b_path, ':', why[1]
ok = 0
#
if ok:
a_type = S_IFMT(a_stat[ST_MODE])
b_type = S_IFMT(b_stat[ST_MODE])
if a_type <> b_type:
dd.common_funny.append(x)
elif S_ISDIR(a_type):
dd.common_dirs.append(x)
elif S_ISREG(a_type):
dd.common_files.append(x)
else:
dd.common_funny.append(x)
else:
dd.common_funny.append(x)
#
def phase3(dd): # Find out differences between common files
xx = cmpfiles(dd.a, dd.b, dd.common_files)
dd.same_files, dd.diff_files, dd.funny_files = xx
#
def phase4(dd): # Find out differences between common subdirectories
# A new dircmp object is created for each common subdirectory,
# these are stored in a dictionary indexed by filename.
# The hide and ignore properties are inherited from the parent
dd.subdirs = {}
for x in dd.common_dirs:
a_x = path.join(dd.a, x)
b_x = path.join(dd.b, x)
dd.subdirs[x] = newdd = dircmp().new(a_x, b_x)
newdd.hide = dd.hide
newdd.ignore = dd.ignore
newdd.run()
#
def phase4_closure(dd): # Recursively call phase4() on subdirectories
dd.phase4()
for x in dd.subdirs.keys():
dd.subdirs[x].phase4_closure()
#
def report(dd): # Print a report on the differences between a and b
# Assume that phases 1 to 3 have been executed
# Output format is purposely lousy
print 'diff', dd.a, dd.b
if dd.a_only:
print 'Only in', dd.a, ':', dd.a_only
if dd.b_only:
print 'Only in', dd.b, ':', dd.b_only
if dd.same_files:
print 'Identical files :', dd.same_files
if dd.diff_files:
print 'Differing files :', dd.diff_files
if dd.funny_files:
print 'Trouble with common files :', dd.funny_files
if dd.common_dirs:
print 'Common subdirectories :', dd.common_dirs
if dd.common_funny:
print 'Common funny cases :', dd.common_funny
#
def report_closure(dd): # Print reports on dd and on subdirs
# If phase 4 hasn't been done, no subdir reports are printed
dd.report()
try:
x = dd.subdirs
except AttributeError:
return # No subdirectories computed
for x in dd.subdirs.keys():
print
dd.subdirs[x].report_closure()
#
def report_phase4_closure(dd): # Report and do phase 4 recursively
dd.report()
dd.phase4()
for x in dd.subdirs.keys():
print
dd.subdirs[x].report_phase4_closure()
# Compare common files in two directories.
# Return:
# - files that compare equal
# - files that compare different
# - funny cases (can't stat etc.)
#
def cmpfiles(a, b, common):
res = ([], [], [])
for x in common:
res[cmp(path.join(a, x), path.join(b, x))].append(x)
return res
# Compare two files.
# Return:
# 0 for equal
# 1 for different
# 2 for funny cases (can't stat, etc.)
#
def cmp(a, b):
try:
if cmpcache.cmp(a, b): return 0
return 1
except posix.error:
return 2
# Remove a list item.
# NB: This modifies the list argument.
#
def remove(list, item):
for i in range(len(list)):
if list[i] = item:
del list[i]
break
# Return a copy with items that occur in skip removed.
#
def filter(list, skip):
result = []
for item in list:
if item not in skip: result.append(item)
return result
# Demonstration and testing.
#
def demo():
import sys
import getopt
options, args = getopt.getopt(sys.argv[1:], 'r')
if len(args) <> 2: raise getopt.error, 'need exactly two args'
dd = dircmp().new(args[0], args[1])
dd.run()
if ('-r', '') in options:
dd.report_phase4_closure()
else:
dd.report()
# demo()
|
