Support full roundtrip translation of eggs to and from ``bdist_wininst``

format.  Running ``bdist_wininst`` on a setuptools-based package wraps the
egg in an .exe that will safely install it as an egg (i.e., with metadata
and entry-point wrapper scripts), and ``easy_install`` can turn the .exe
back into an ``.egg`` file or directory and install it as such.

At this point, it should also be possible to "system package" any egg,
complete with wrapper scripts, and at least bdist_wininst works now.
More testing is needed for at least bdist_dumb and bdist_rpm.

--HG--
branch : setuptools
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/trunk/setuptools%4041692

1 files changed, 40 insertions, 0 deletions

diff --git a/setuptools/command/install_scripts.py b/setuptools/command/install_scripts.py
new file mode 100755
index 00000000..470d4be4
--- /dev/null
+++ b/setuptools/command/install_scripts.py
@@ -0,0 +1,40 @@
+from distutils.command.install_scripts import install_scripts \
+     as _install_scripts
+from easy_install import get_script_args
+from pkg_resources import Distribution, PathMetadata, ensure_directory
+import os
+from distutils import log
+
+
+class install_scripts(_install_scripts):
+    """Do normal script install, plus any egg_info wrapper scripts"""
+
+    def run(self):
+        self.run_command("egg_info")
+        _install_scripts.run(self)  # run first to set up self.outfiles
+
+        ei_cmd = self.get_finalized_command("egg_info")       
+        dist = Distribution(
+            ei_cmd.egg_base, PathMetadata(ei_cmd.egg_base, ei_cmd.egg_info),
+            ei_cmd.egg_name, ei_cmd.egg_version,
+        )
+        for args in get_script_args(dist):
+            self.write_script(*args)
+
+    def write_script(self, script_name, contents, mode="t", *ignored):
+        """Write an executable file to the scripts directory"""
+
+        log.info("Installing %s script to %s", script_name, self.install_dir)
+        target = os.path.join(self.install_dir, script_name)
+        self.outfiles.append(target)
+
+        if not self.dry_run:
+            ensure_directory(target)
+            f = open(target,"w"+mode)
+            f.write(contents)
+            f.close()
+            try:
+                os.chmod(target,0755)
+            except (AttributeError, os.error):
+                pass
+