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
|
"""distutils.command.build_scripts
Implements the Distutils 'build_scripts' command."""
import os, re
from stat import ST_MODE
from distutils import sysconfig
from distutils.core import Command
from distutils.dep_util import newer
from distutils.util import convert_path, Mixin2to3
from distutils import log
import tokenize
# check if Python is called on the first line with this expression
first_line_re = re.compile(b'^#!.*python[0-9.]*([ \t].*)?$')
class build_scripts(Command):
description = "\"build\" scripts (copy and fixup #! line)"
user_options = [
('build-dir=', 'd', "directory to \"build\" (copy) to"),
('force', 'f', "forcibly build everything (ignore file timestamps"),
('executable=', 'e', "specify final destination interpreter path"),
]
boolean_options = ['force']
def initialize_options(self):
self.build_dir = None
self.scripts = None
self.force = None
self.executable = None
self.outfiles = None
def finalize_options(self):
self.set_undefined_options('build',
('build_scripts', 'build_dir'),
('force', 'force'),
('executable', 'executable'))
self.scripts = self.distribution.scripts
def get_source_files(self):
return self.scripts
def run(self):
if not self.scripts:
return
self.copy_scripts()
def copy_scripts(self):
r"""Copy each script listed in 'self.scripts'; if it's marked as a
Python script in the Unix way (first line matches 'first_line_re',
ie. starts with "\#!" and contains "python"), then adjust the first
line to refer to the current Python interpreter as we copy.
"""
self.mkpath(self.build_dir)
outfiles = []
updated_files = []
for script in self.scripts:
adjust = False
script = convert_path(script)
outfile = os.path.join(self.build_dir, os.path.basename(script))
outfiles.append(outfile)
if not self.force and not newer(script, outfile):
log.debug("not copying %s (up-to-date)", script)
continue
# Always open the file, but ignore failures in dry-run mode --
# that way, we'll get accurate feedback if we can read the
# script.
try:
f = open(script, "rb")
except OSError:
if not self.dry_run:
raise
f = None
else:
encoding, lines = tokenize.detect_encoding(f.readline)
f.seek(0)
first_line = f.readline()
if not first_line:
self.warn("%s is an empty file (skipping)" % script)
continue
match = first_line_re.match(first_line)
if match:
adjust = True
post_interp = match.group(1) or b''
if adjust:
log.info("copying and adjusting %s -> %s", script,
self.build_dir)
updated_files.append(outfile)
if not self.dry_run:
if not sysconfig.python_build:
executable = self.executable
else:
executable = os.path.join(
sysconfig.get_config_var("BINDIR"),
"python%s%s" % (sysconfig.get_config_var("VERSION"),
sysconfig.get_config_var("EXE")))
executable = os.fsencode(executable)
shebang = b"#!" + executable + post_interp + b"\n"
# Python parser starts to read a script using UTF-8 until
# it gets a #coding:xxx cookie. The shebang has to be the
# first line of a file, the #coding:xxx cookie cannot be
# written before. So the shebang has to be decodable from
# UTF-8.
try:
shebang.decode('utf-8')
except UnicodeDecodeError:
raise ValueError(
"The shebang ({!r}) is not decodable "
"from utf-8".format(shebang))
# If the script is encoded to a custom encoding (use a
# #coding:xxx cookie), the shebang has to be decodable from
# the script encoding too.
try:
shebang.decode(encoding)
except UnicodeDecodeError:
raise ValueError(
"The shebang ({!r}) is not decodable "
"from the script encoding ({})"
.format(shebang, encoding))
with open(outfile, "wb") as outf:
outf.write(shebang)
outf.writelines(f.readlines())
if f:
f.close()
else:
if f:
f.close()
updated_files.append(outfile)
self.copy_file(script, outfile)
if os.name == 'posix':
for file in outfiles:
if self.dry_run:
log.info("changing mode of %s", file)
else:
oldmode = os.stat(file)[ST_MODE] & 0o7777
newmode = (oldmode | 0o555) & 0o7777
if newmode != oldmode:
log.info("changing mode of %s from %o to %o",
file, oldmode, newmode)
os.chmod(file, newmode)
# XXX should we modify self.outfiles?
return outfiles, updated_files
class build_scripts_2to3(build_scripts, Mixin2to3):
def copy_scripts(self):
outfiles, updated_files = build_scripts.copy_scripts(self)
if not self.dry_run:
self.run_2to3(updated_files)
return outfiles, updated_files
|
