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"""distutils.command.build_scripts
Implements the Distutils 'build_scripts' command."""
# created 2000/05/23, Bastian Kleineidam
__revision__ = "$Id$"
import sys, os, re
from distutils.core import Command
from distutils.dep_util import newer
# check if Python is called on the first line with this expression
first_line_re = re.compile(r'^#!.*python(\s+.*)?')
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"),
]
def initialize_options (self):
self.build_dir = None
self.scripts = None
self.force = None
self.outfiles = None
def finalize_options (self):
self.set_undefined_options ('build',
('build_scripts', 'build_dir'),
('force', 'force'))
self.scripts = self.distribution.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.
"""
outfiles = []
self.mkpath(self.build_dir)
for script in self.scripts:
adjust = 0
outfile = os.path.join(self.build_dir, os.path.basename(script))
if not self.force and not newer(script, outfile):
self.announce("not copying %s (output 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)
if adjust:
self.announce("copying and adjusting %s -> %s" %
(script, self.build_dir))
if not self.dry_run:
outf = open(outfile, "w")
outf.write("#!%s%s\n" %
(os.path.normpath(sys.executable), post_interp))
outf.writelines(f.readlines())
outf.close()
if f:
f.close()
else:
f.close()
self.copy_file(script, outfile)
# copy_scripts ()
# class build_scripts
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