nxgs

home-modules/nxgs.nix

@@ -0,0 +1,51 @@
+{ pkgs, ... }:
+{
+	home.packages = with pkgs; [
+    ghostscript
+    (writeShellApplication rec {
+      name = "nxgs";
+      text = /* bash */ ''
+        print_help() {
+            echo "Usage: ${name} {flip <file(s)>|rotate <file(s)>|merge <Out File Name> <files>}"
+        }
+        if [ $# -lt 1 ]; then
+            print_help; exit 1;
+        fi
+        case "$1" in
+          flip)
+            for FILE in "''${@:2}"; do
+              NXGSTEMP=$(mktemp)
+              gs -o "$NXGSTEMP" -sDEVICE=pdfwrite -c "<</Orientation 2>> setpagedevice" -f "$FILE"
+              mv "$NXGSTEMP" "$FILE"
+            done 
+          ;;
+          rotate)
+            for FILE in "''${@:2}"; do
+              NXGSTEMP=$(mktemp)
+              gs -o "$NXGSTEMP" -sDEVICE=pdfwrite -c "<</Orientation 1>> setpagedevice" -f "$FILE"
+              mv "$NXGSTEMP" "$FILE"
+            done 
+          ;;
+          merge)
+            gs -dBATCH -dNOPAUSE -q -sOUTPUTFILE="$3" -sDEVICE=pdfwrite "''${@:3}"
+          ;;
+          interactive-merge)
+            echo -n "Enter Name of the merged file without extension: "; read -r MERGED 
+            NXGSTEMP=$(mktemp)
+            echo "''${@:2}" | tr " " "\n" > "$NXGSTEMP"
+            $EDITOR "$NXGSTEMP"
+            mapfile -t FILES < "$NXGSTEMP"
+            gs -dBATCH -dNOPAUSE -q -sOUTPUTFILE="''${MERGED}.pdf" -sDEVICE=pdfwrite "''${FILES[@]}"
+            rm "$NXGSTEMP"
+          ;;
+          *)
+            echo "Error: Unknown command '$1'"
+            print_help
+            exit 1
+          ;;
+      esac
+      exit 0
+      '';
+    })
+  ];
+}