added current gentooimgr

gentooimgr/shrink.py

@@ -0,0 +1,15 @@
+import os
+import datetime
+from subprocess import PIPE, Popen
+
+def shrink(args, config,  stamp=None):
+    if stamp is None:
+        dt = datetime.datetime.utcnow()
+        # 0 padded month and day timestamp
+        stamp = f"{dt.year}-{dt.month:02d}-{dt.day:02d}"
+    name, ext = os.path.splitext(config.get("imagename") or args.img)
+    # ext includes the .
+    filename = f"{name}-{stamp}{ext}"
+    proc = Popen(["virt-sparsify", "--compress", args.img, filename])
+    proc.communicate()
+    return filename