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"""distutils.command.build_scripts
Implements the Distutils 'build_scripts' command."""
__revision__ = "$Id$"
import sys, 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
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.
"""
self.mkpath(self.build_dir)
outfiles = []
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, "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 = True
post_interp = match.group(1) or ''
if adjust:
log.info("copying and adjusting %s -> %s", script,
self.build_dir)
if not self.dry_run:
outf = open(outfile, "w")
if not sysconfig.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" + 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] & 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)
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