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Improvements to Bastian's build_scripts command:

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* 'first_line_re' loosened up
  * command description improved
  * replaced '_copy_files()' and '_adjust_files()' with one method
    that does everything, 'copy_scripts()' -- this should be more
    efficient than Bastian's version, should behave better in
    dry-run mode, and does timestamp dependency-checking
This commit is contained in:
Greg Ward 2000-05-25 02:03:56 +00:00
parent 029e302786
commit 80fa55e71f
1 changed files with 58 additions and 31 deletions
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89
Lib/distutils/command/build_scripts.py
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@ -6,15 +6,16 @@ Implements the Distutils 'build_scripts' command."""
__revision__ = "$Id$"
import sys,os,re
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-\w+)*")
first_line_re = re.compile(r'^#!.*python(\s+.*)?')
class build_scripts (Command):
description = "\"build\" scripts"
description = "\"build\" scripts (copy and fixup #! line)"
user_options = [
('build-dir=', 'd', "directory to \"build\" (copy) to"),
@ -38,34 +39,60 @@ class build_scripts (Command):
def run (self):
if not self.scripts:
return
self._copy_files()
self._adjust_files()
self.copy_scripts()
def _copy_files(self):
"""Copy all the scripts to the build dir"""
self.outfiles = []
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 intepreter as we copy.
"""
outfiles = []
self.mkpath(self.build_dir)
for f in self.scripts:
print self.build_dir
if self.copy_file(f, self.build_dir):
self.outfiles.append(os.path.join(self.build_dir, f))
def _adjust_files(self):
"""If the first line begins with #! and ends with python
replace it with the current python interpreter"""
for f in self.outfiles:
if not self.dry_run:
data = open(f, "r").readlines()
if not data:
self.warn("%s is an empty file!" % f)
for script in self.scripts:
adjust = 0
outfile = os.path.join(self.build_dir, 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
mo = first_line_re.match(data[0])
if mo:
self.announce("Adjusting first line of file %s" % f)
data[0] = "#!"+sys.executable
# add optional command line options
if mo.group(1):
data[0] = data[0] + mo.group(1)
else:
data[0] = data[0] + "\n"
open(f, "w").writelines(data)
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