respect the sys.dont_write_bytecode flag. Fixes #147

--HG--
branch : distribute
extra : rebase_source : 889c1badc92b1de14352a141865172b0a39384fa

CHANGES.txt

@@ -17,6 +17,7 @@ CHANGES
 * Issue 100: Fixed develop --user not taking '.' in PYTHONPATH into account
 * Issue 134: removed spurious UserWarnings. Patch by VanLindberg
 * Issue 138: cant_write_to_target error when setup_requires is used.
+* Issue 147: respect the sys.dont_write_bytecode flag
 
 ------
 0.6.10

setuptools/__init__.py

@@ -5,7 +5,8 @@
 from setuptools.depends import Require
 from distutils.core import Command as _Command
 from distutils.util import convert_path
-import os.path
+import os
+import sys
 
 __version__ = '0.6'
 __all__ = [
@@ -95,4 +96,9 @@ def findall(dir = os.curdir):
 import distutils.filelist
 distutils.filelist.findall = findall    # fix findall bug in distutils.
 
-
+# sys.dont_write_bytecode was introduced in Python 2.6.
+if ((hasattr(sys, "dont_write_bytecode") and sys.dont_write_bytecode) or
+    (not hasattr(sys, "dont_write_bytecode") and os.environ.get("PYTHONDONTWRITEBYTECODE"))):
+    _dont_write_bytecode = True
+else:
+    _dont_write_bytecode = False

setuptools/command/easy_install.py

@@ -12,7 +12,7 @@
 """
 import sys, os.path, zipimport, shutil, tempfile, zipfile, re, stat, random
 from glob import glob
-from setuptools import Command
+from setuptools import Command, _dont_write_bytecode
 from setuptools.sandbox import run_setup
 from distutils import log, dir_util
 from distutils.util import convert_path, subst_vars
@@ -1149,6 +1149,10 @@ def pf(src,dst):
                 chmod(f, mode)
 
     def byte_compile(self, to_compile):
+        if _dont_write_bytecode:
+            self.warn('byte-compiling is disabled, skipping.')
+            return
+
         from distutils.util import byte_compile
         try:
             # try to make the byte compile messages quieter