Add clump (gpg-based directory (en|de)crypter)

bin/clump

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# Script for encrypting and decrypting folders, using GPG and tar
+# Usage:
+#   clump foldername               # packs
+#   clump foldername dest          # packs to specific location
+#   clump foldername.clump         # unpacks
+#   clump foldername.clump dest    # unpacks to specific location
+
+if [ "$#" -eq 0 ]; then
+    >&2 echo "Usage: $0 <FILE|DIRECTORY> [DEST]"
+    exit 1
+fi
+
+EXT="clump"
+TARGET="$1"
+COMMAND=
+if [ -f "$TARGET" ]; then
+    COMMAND=unpack
+elif [ -d "$TARGET" ]; then
+    COMMAND=pack
+else
+    >&2 echo "Not a valid target: '$TARGET'"
+    exit 1
+fi
+
+case "$COMMAND" in
+    p|pack)
+        if [ -f "$TARGET.$EXT" ]; then
+            >&2 echo "Destination file already exists"
+            exit 2
+        fi
+        tar -pcvf - "$TARGET" | gpg -c > "$TARGET.$EXT"
+        echo "Packed into $TARGET.$EXT"
+        ;;
+    u|unpack)
+        TMPFILE=$(mktemp)
+        gpg -d "$TARGET" > "$TMPFILE" && tar -pxvf "$TMPFILE"
+        rm -f "$TMPFILE"
+        ;;
+esac