Combine scripts and custom packages

packages/unmounter.nix

@@ -0,0 +1,36 @@
+{ pkgs }:
+
+pkgs.writeShellApplication {
+  name = "unmounter";
+
+  runtimeInputs = with pkgs; [
+    cryptsetup
+    dmenu
+    gawk
+    libnotify
+    util-linux
+  ];
+
+  text = ''
+    lsblk_output="$(lsblk -nrpo "name,type,size,mountpoint")"
+    mounted_drives="$(echo "$lsblk_output" | awk '($2=="part"||$2="crypt")&&$4!~/\/boot|\/home$|SWAP/&&length($4)>1{printf "%s (%s)\n",$4,$3}')"
+
+    all_unmountable="$(echo "$mounted_drives" | sed "/^$/d;s/ *$//")"
+    test -n "$all_unmountable"
+
+    selected="$(echo "$all_unmountable" | dmenu -i -p "Unmount which drive?")"
+    selected="''${selected%% *}"
+    test -n "$selected"
+
+    sudo -A umount -l "/''${selected#*/}"
+    notify-send "Device unmounted" "$selected has been unmounted."
+
+    # Close the selected drive if decrypted.
+    cryptid="$(echo "$lsblk_output" | grep "/''${selected#*/}$")"
+    cryptid="''${cryptid%% *}"
+    test -b /dev/mapper/"''${cryptid##*/}"
+    sudo -A cryptsetup close "$cryptid"
+
+    notify-send "Device dencryption closed" "Drive is now securely locked again."
+  '';
+}