1 files changed, 61 insertions, 0 deletions
diff --git a/morphlib/extractedtarball.py b/morphlib/extractedtarball.py
new file mode 100644
index 00000000..e435b1ef
--- /dev/null
+++ b/morphlib/extractedtarball.py
@@ -0,0 +1,61 @@
+# Copyright (C) 2012-2013  Codethink Limited
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+
+import cliapp
+import gzip
+import os
+import tempfile
+import shutil
+
+import morphlib
+
+
+class ExtractedTarball(object): # pragma: no cover
+
+    '''Tarball extracted in a temporary directory.
+
+    This can be used e.g. to inspect the contents of a rootfs tarball.
+
+    '''
+    def __init__(self, app, tarball):
+        self.app = app
+        self.tarball = tarball
+
+    def setup(self):
+        self.app.status(msg='Preparing tarball %(tarball)s',
+                        tarball=os.path.basename(self.tarball), chatty=True)
+        self.app.status(msg='  Extracting...', chatty=True)
+        self.tempdir = tempfile.mkdtemp(dir=self.app.settings['tempdir'])
+        try:
+            morphlib.bins.unpack_binary(self.tarball, self.tempdir)
+        except:
+            shutil.rmtree(self.tempdir)
+            raise
+        return self.tempdir
+
+    def cleanup(self):
+        self.app.status(msg='Cleanup extracted tarball %(tarball)s',
+                        tarball=os.path.basename(self.tarball), chatty=True)
+        try:
+            shutil.rmtree(self.tempdir)
+        except:
+            pass
+
+    def __enter__(self):
+        return self.setup()
+
+    def __exit__(self, exctype, excvalue, exctraceback):
+        self.cleanup()