[kupfer: 1/27] A Work in Progress on a "Look inside compressed archives" plugin

[Ulrik Sverdrup <usverdrup src gnome org>]

commit eaeb2e37f2e61079e619ffe571cd0d0d13e5fc63
Author: Ulrik Sverdrup <ulrik sverdrup gmail com>
Date:   Fri Jan 22 15:30:26 2010 +0100

    A Work in Progress on a "Look inside compressed archives" plugin

 kupfer/plugin/archiveinside.py |   64 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 64 insertions(+), 0 deletions(-)
---
diff --git a/kupfer/plugin/archiveinside.py b/kupfer/plugin/archiveinside.py
new file mode 100644
index 0000000..abbdfa1
--- /dev/null
+++ b/kupfer/plugin/archiveinside.py
@@ -0,0 +1,64 @@
+"""
+A test project to see if we can make a plugin that allows us to
+drill down into compressed archives.
+
+Issues to resolve:
+
+ * Refuse looking into archives over a certain size
+ * Add option to clean up at Kupfer's exit
+ * Handle zip, tar.gz and anything we can
+ * Detect when the archive has changed.
+"""
+__kupfer_name__ = _("Look inside Archives")
+__kupfer_contents__ = ("ArchiveContent", )
+__description__ = _("Recently used documents and bookmarked folders")
+__version__ = ""
+__author__ = "Ulrik Sverdrup <ulrik sverdrup gmail com>"
+
+import hashlib
+import os
+import tarfile
+import zipfile
+
+from kupfer.objects import Source, FileLeaf
+from kupfer.obj.sources import DirectorySource
+from kupfer import utils
+
+
+
+class ArchiveContent (Source):
+	def __init__(self, fileleaf):
+		Source.__init__(self, _("Content of %s") % fileleaf)
+		self.path = fileleaf.object
+
+	def repr_key(self):
+		return self.path
+
+	def get_items(self):
+		# always use the same destination for the same file
+		basename = os.path.basename(os.path.normpath(self.path))
+		root, ext = os.path.splitext(basename)
+		fileid = hashlib.sha1(self.path).hexdigest()
+		pth = os.path.join("/tmp", "kupfer-%s-%s" % (root, fileid, ))
+		if not os.path.exists(pth):
+			zf = tarfile.TarFile.gzopen(self.path)
+			zf.extractall(path=pth)
+		files = list(DirectorySource(pth).get_items())
+		if len(files) == 1 and files[0].has_content():
+			return files[0].content_source().get_leaves()
+		return files
+
+	def get_description(self):
+		return None
+
+	@classmethod
+	def decorates_type(cls):
+		return FileLeaf
+
+	@classmethod
+	def decorate_item(cls, leaf):
+		root, ext = os.path.splitext(leaf.object)
+		if ext.lower() in (".gz", ".zip"):
+			return cls(leaf)
+		return None
+