[kupfer] Allow plugins installed in .zip packages

[Ulrik Sverdrup <usverdrup src gnome org>]

commit 1882035cf381b4d4f0de865894964e24016f6b0b
Author: Ulrik Sverdrup <ulrik sverdrup gmail com>
Date:   Mon Feb 8 21:15:53 2010 +0100

    Allow plugins installed in .zip packages
    
    We find .zip files in all plugin directories and add them to Python's
    path. This means that you can take a plugin python package (folder
    with __init__.py inside, and icons and what you want), compress it as
    a .zip file pluginname.zip and add it in ~/.local/share/kupfer/plugins

 kupfer/plugin/__init__.py |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/kupfer/plugin/__init__.py b/kupfer/plugin/__init__.py
index a93fbcb..da24234 100644
--- a/kupfer/plugin/__init__.py
+++ b/kupfer/plugin/__init__.py
@@ -1,3 +1,19 @@
+import os
+
 from kupfer import config
+from kupfer import pretty
 
+# Add plugins in data directories
 __path__.extend(config.get_data_dirs("plugins"))
+
+# Add .zip files in plugins directories
+for directory in list(__path__):
+	try:
+		filenames = os.listdir(directory)
+	except OSError, err:
+		pretty.print_error(__name__, err)
+		continue
+	zipnames = [f for f in filenames if f.endswith(".zip")]
+	if zipnames:
+		pretty.print_debug(__name__, "Adding", directory, zipnames)
+	__path__.extend(os.path.join(directory, z) for z in zipnames)