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
|
#! /usr/bin/env python3
# pdeps
#
# Find dependencies between a bunch of Python modules.
#
# Usage:
# pdeps file1.py file2.py ...
#
# Output:
# Four tables separated by lines like '--- Closure ---':
# 1) Direct dependencies, listing which module imports which other modules
# 2) The inverse of (1)
# 3) Indirect dependencies, or the closure of the above
# 4) The inverse of (3)
#
# To do:
# - command line options to select output type
# - option to automatically scan the Python library for referenced modules
# - option to limit output to particular modules
import sys
import re
import os
# Main program
#
def main():
args = sys.argv[1:]
if not args:
print('usage: pdeps file.py file.py ...')
return 2
#
table = {}
for arg in args:
process(arg, table)
#
print('--- Uses ---')
printresults(table)
#
print('--- Used By ---')
inv = inverse(table)
printresults(inv)
#
print('--- Closure of Uses ---')
reach = closure(table)
printresults(reach)
#
print('--- Closure of Used By ---')
invreach = inverse(reach)
printresults(invreach)
#
return 0
# Compiled regular expressions to search for import statements
#
m_import = re.compile('^[ \t]*from[ \t]+([^ \t]+)[ \t]+')
m_from = re.compile('^[ \t]*import[ \t]+([^#]+)')
# Collect data from one file
#
def process(filename, table):
with open(filename, encoding='utf-8') as fp:
mod = os.path.basename(filename)
if mod[-3:] == '.py':
mod = mod[:-3]
table[mod] = list = []
while 1:
line = fp.readline()
if not line: break
while line[-1:] == '\\':
nextline = fp.readline()
if not nextline: break
line = line[:-1] + nextline
m_found = m_import.match(line) or m_from.match(line)
if m_found:
(a, b), (a1, b1) = m_found.regs[:2]
else: continue
words = line[a1:b1].split(',')
# print '#', line, words
for word in words:
word = word.strip()
if word not in list:
list.append(word)
# Compute closure (this is in fact totally general)
#
def closure(table):
modules = list(table.keys())
#
# Initialize reach with a copy of table
#
reach = {}
for mod in modules:
reach[mod] = table[mod][:]
#
# Iterate until no more change
#
change = 1
while change:
change = 0
for mod in modules:
for mo in reach[mod]:
if mo in modules:
for m in reach[mo]:
if m not in reach[mod]:
reach[mod].append(m)
change = 1
#
return reach
# Invert a table (this is again totally general).
# All keys of the original table are made keys of the inverse,
# so there may be empty lists in the inverse.
#
def inverse(table):
inv = {}
for key in table.keys():
if key not in inv:
inv[key] = []
for item in table[key]:
store(inv, item, key)
return inv
# Store "item" in "dict" under "key".
# The dictionary maps keys to lists of items.
# If there is no list for the key yet, it is created.
#
def store(dict, key, item):
if key in dict:
dict[key].append(item)
else:
dict[key] = [item]
# Tabulate results neatly
#
def printresults(table):
modules = sorted(table.keys())
maxlen = 0
for mod in modules: maxlen = max(maxlen, len(mod))
for mod in modules:
list = sorted(table[mod])
print(mod.ljust(maxlen), ':', end=' ')
if mod in list:
print('(*)', end=' ')
for ref in list:
print(ref, end=' ')
print()
# Call main and honor exit status
if __name__ == '__main__':
try:
sys.exit(main())
except KeyboardInterrupt:
sys.exit(1)
|
