- added the following step to make_release: fix EOL in distribution source, generate source tarball.

- devtools/ was made into a python module and common utilities are being moved in this module

devtools/tarball.py

@@ -0,0 +1,41 @@
+import os.path
+import gzip
+import tarfile
+
+TARGZ_DEFAULT_COMPRESSION_LEVEL = 9
+
+def make_tarball(tarball_path, sources, base_dir, prefix_dir=''):
+    """Parameters:
+    tarball_path: output path of the .tar.gz file
+    sources: list of sources to include in the tarball, relative to the current directory
+    base_dir: if a source file is in a sub-directory of base_dir, then base_dir is stripped
+        from path in the tarball.
+    prefix_dir: all files stored in the tarball be sub-directory of prefix_dir. Set to ''
+        to make them child of root.
+    """
+    base_dir = os.path.normpath( os.path.abspath( base_dir ) )
+    def archive_name( path ):
+        """Makes path relative to base_dir."""
+        path = os.path.normpath( os.path.abspath( path ) )
+        common_path = os.path.commonprefix( (base_dir, path) )
+        archive_name = path[len(common_path):]
+        if os.path.isabs( archive_name ):
+            archive_name = archive_name[1:]
+        return os.path.join( prefix_dir, archive_name )
+    def visit(tar, dirname, names):
+        for name in names:
+            path = os.path.join(dirname, name)
+            if os.path.isfile(path):
+                path_in_tar = archive_name(path)
+                tar.add(path, path_in_tar )
+    compression = TARGZ_DEFAULT_COMPRESSION_LEVEL
+    fileobj = gzip.GzipFile( tarball_path, 'wb', compression )
+    tar = tarfile.TarFile(os.path.splitext(tarball_path)[0], 'w', fileobj)
+    for source in sources:
+        source_path = source
+        if os.path.isdir( source ):
+            os.path.walk(source_path, visit, tar)
+        else:
+            path_in_tar = archive_name(source_path)
+            tar.add(source_path, path_in_tar )      # filename, arcname
+    tar.close()