Bastian Kleineidam: the "build_scripts" command and changes

necessary to support it.

Details:
  - build command additionally calls build_scripts
  - build_scripts builds your scripts in 'build/scripts' and adjusts the
    first line if it begins with "#!" and ends with "python", optionally
    ending with commandline options (like -O, -t ...).  Adjusting means we
    write the current path to the Python interpreter in the first line.
  - install_scripts copies the scripts to the install_scripts dir
  - install_data copies your data_files in install_data. You can
    supply individual directories for your data_files:

    data_files = ['doc/info.txt', # copy this file in install_scripts dir
      ('testdata', ['a.dat', 'b.dat']), # copy these files in
                                        # install_scripts/testdata
      ('/etc', ['packagerc']),    # copy this in /etc. When --root is
                                  # given, copy this in rootdir/etc
    ]

    So you can use the --root option with absolute data paths.

Lib/distutils/command/install_scripts.py

@@ -8,23 +8,39 @@ Python scripts."""
 __revision__ = "$Id$"
 
 import os
-from distutils.cmd import install_misc
+from distutils.core import Command
 from stat import ST_MODE
 
-class install_scripts(install_misc):
+class install_scripts(Command):
 
     description = "install scripts"
 
+    user_options = [
+        ('install-dir=', 'd', "directory to install to"),
+        ('build-dir=','b', "build directory (where to install from)"),
+        ('skip-build', None, "skip the build steps"),
+    ]
+
+    def initialize_options (self):
+        self.install_dir = None
+        self.build_dir = None
+        self.skip_build = None
+
     def finalize_options (self):
-        self._install_dir_from('install_scripts')
+        self.set_undefined_options('build', ('build_scripts', 'build_dir'))
+        self.set_undefined_options ('install',
+                                    ('install_scripts', 'install_dir'),
+                                    ('skip_build', 'skip_build'),
+                                   )
 
     def run (self):
-        self._copy_files(self.distribution.scripts)
+        if not self.skip_build:
+            self.run_peer('build_scripts')
+        self.outfiles = self.copy_tree (self.build_dir, self.install_dir)
         if os.name == 'posix':
             # Set the executable bits (owner, group, and world) on
             # all the scripts we just installed.
-            files = self.get_outputs()
-            for file in files:
+            for file in self.get_outputs():
                 if self.dry_run:
                     self.announce("changing mode of %s" % file)
                 else:
@@ -35,4 +51,7 @@ class install_scripts(install_misc):
     def get_inputs (self):
         return self.distribution.scripts or []
 
+    def get_outputs(self):
+        return self.outfiles or []
+
 # class install_scripts