ykoath-tools: init at 1

Two small shell wrappers around `ykman oath` to make access to OATH tokens on
yubikeys easier.

`ykoath` is just a shortcut for `ykman oath accounts code`

`ykclip` copies the OTP to the clipboard. Set YKCLIP_SELECTION to the X/Wayland
selection you want to use. (Defaults to clipboard)

default.nix

@@ -12,6 +12,8 @@ in rec {
 
   snipe-it = callPackage ./pkgs/snipe-it { };
 
+  ykoath-tools = callPackage ./pkgs/ykoath-tools { };
+
 } // optionalAttrs (pkgs.system == "x86_64-linux") rec {
 
   ryzen_smu = callPackage ./pkgs/ryzen_smu { kernel = pkgs.linux; };

pkgs/ykoath-tools/default.nix

@@ -0,0 +1,42 @@
+{ stdenv, lib, writeScript, xclip, wl-clipboard, yubikey-manager }:
+
+let
+  ykoath = writeScript "ykoath" ''
+    #!${stdenv.shell}
+    ${lib.getBin yubikey-manager}/bin/ykman oath accounts code $@
+  '';
+  ykclip = writeScript "ykclip" ''
+    #!${stdenv.shell}
+    X_SELECTION=''${YKCLIP_SELECTION:-clipboard}
+    if [ -n "$WAYLAND_DISPLAY" ]; then
+      cmd="${lib.getBin wl-clipboard}/bin/wl-copy"
+      if [ "$X_SELECTION" = primary ]; then
+        cmd="$cmd --primary"
+      fi
+    elif [ -n "$DISPLAY" ]; then
+      cmd="${lib.getBin xclip}/bin/xclip -selection '$X_SELECTION'"
+    else
+      echo "Error: No graphical session detected"; exit 1
+    fi
+    otp=$(${lib.getBin yubikey-manager}/bin/ykman oath accounts code -s $@)
+    rv=$?
+    if [ "$rv" -eq 0 ] && [ -n "$otp" ]; then
+      printf "%s" "$otp" | $cmd
+    else
+      echo "Error: Receiving OTP"; exit 1
+    fi
+  '';
+in stdenv.mkDerivation {
+  pname = "ykoath-tools";
+  version = "1";
+  buildCommand = ''
+    mkdir -p "$out/bin"
+    ln -s ${ykoath} "$out/bin/ykoath"
+    ln -s ${ykclip} "$out/bin/ykclip"
+  '';
+  meta = with lib; {
+    description = "Make using OATH with yubikeys from the command-line easier.";
+    maintainers = [ maintainers.spacefrogg ];
+    license = licenses.gpl3;
+  };
+}