Lib.distutils.command.build_scripts.py Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jython Show documentation
Show all versions of jython Show documentation
Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
"""distutils.command.build_scripts
Implements the Distutils 'build_scripts' command."""
__revision__ = "$Id$"
import os
import re
import sys
from stat import ST_MODE
from distutils.core import Command
from distutils.dep_util import newer
from distutils.util import convert_path
from distutils import log
# check if Python is called on the first line with this expression
first_line_re = re.compile('^#!.*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):
"""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.
"""
_sysconfig = __import__('sysconfig')
self.mkpath(self.build_dir)
outfiles = []
for script in self.scripts:
adjust = 0
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, "r")
except IOError:
if not self.dry_run:
raise
f = None
else:
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 = 1
post_interp = match.group(1) or ''
if adjust:
log.info("copying and adjusting %s -> %s", script,
self.build_dir)
self.executable = fix_jython_executable(self.executable, post_interp)
if not self.dry_run:
outf = open(outfile, "w")
if not _sysconfig.is_python_build():
outf.write("#!%s%s\n" %
(self.executable,
post_interp))
else:
outf.write("#!%s%s\n" %
(os.path.join(
_sysconfig.get_config_var("BINDIR"),
"python%s%s" % (_sysconfig.get_config_var("VERSION"),
_sysconfig.get_config_var("EXE"))),
post_interp))
outf.writelines(f.readlines())
outf.close()
if f:
f.close()
else:
if f:
f.close()
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] & 07777
newmode = (oldmode | 0555) & 07777
if newmode != oldmode:
log.info("changing mode of %s from %o to %o",
file, oldmode, newmode)
os.chmod(file, newmode)
# copy_scripts ()
# class build_scripts
def is_sh(executable):
"""Determine if the specified executable is a .sh (contains a #! line)"""
try:
fp = open(executable)
magic = fp.read(2)
fp.close()
except IOError, OSError:
return executable
return magic == '#!'
def fix_jython_executable(executable, options):
if sys.platform.startswith('java') and is_sh(executable):
# Workaround Jython's sys.executable being a .sh (an invalid
# shebang line interpreter)
if options:
# Can't apply the workaround, leave it broken
log.warn("WARNING: Unable to adapt shebang line for Jython,"
" the following script is NOT executable\n"
" see http://bugs.jython.org/issue1112 for"
" more information.")
else:
return '/usr/bin/env %s' % executable
return executable