A custom setup.py command to fix tarfile permissions. Fixes #54.

1 files changed, 63 insertions, 0 deletions

diff --git a/distcmd/fixtar.py b/distcmd/fixtar.py
new file mode 100644
index 00000000..1a226cb9
--- /dev/null
+++ b/distcmd/fixtar.py
@@ -0,0 +1,63 @@
+"""Add a 'fixtar' command to setup.py.
+
+This lets us have proper permissions in tar files made on Windows.
+
+"""
+from distutils.core import Command
+import shutil, tarfile
+
+class fixtar(Command):
+    """A new setup.py command to fix tar file permissions."""
+
+    description = "Re-pack the tar file to have correct permissions."
+
+    user_options = []
+
+    def initialize_options(self):
+        """Required by Command, even though I have nothing to add."""
+        pass
+
+    def finalize_options(self):
+        """Required by Command, even though I have nothing to add."""
+        pass
+
+    def run(self):
+        """The body of the command."""
+        for _, _, filename in self.distribution.dist_files:
+            if filename.endswith(".tar.gz"):
+                self.repack_tar(filename, "temp.tar.gz")
+                shutil.move("temp.tar.gz", filename)
+
+    def repack_tar(self, infilename, outfilename):
+        """Re-pack `infilename` as `outfilename`.
+
+        Permissions and owners are set the way we like them.
+        Also deletes the source directory, due to unfortunate setup.py
+        mechanics.
+
+        """
+        itar = tarfile.open(infilename, "r:gz")
+        otar = tarfile.open(outfilename, "w:gz")
+        the_dir = None
+        for itarinfo in itar:
+            otarinfo = otar.gettarinfo(itarinfo.name)
+            if the_dir is None:
+                n = itarinfo.name
+                assert n.count("/") == 1 and n.endswith("/")
+                the_dir = n[:-1]
+            if itarinfo.isfile():
+                otarinfo.mode = 0644
+            else:
+                otarinfo.mode = 0755
+            otarinfo.uid = 100
+            otarinfo.gid = 100
+            otarinfo.uname = "ned"
+            otarinfo.gname = "coverage"
+            otar.addfile(otarinfo, itar.extractfile(itarinfo))
+        itar.close()
+        otar.close()
+
+        # To make this work, sdist has to be run with the --keep-temp option.
+        # But the clean command doesn't clean up the temp directory.
+        # Delete it here.
+        shutil.rmtree(the_dir)