initial commit

pkgs/pdf2printable/default.nix

@@ -0,0 +1,39 @@
+{
+  writeShellScriptBin,
+  pdftk,
+  texlivePackages,
+}:
+
+let
+  _pdfjam = "${texlivePackages.pdfjam}/bin/pdfjam";
+  _pdftk = "${pdftk}/bin/pdftk";
+in
+writeShellScriptBin "pdf2printable" ''
+  if [ "$#" -ne 2 ]; then
+    echo "Usage: $0 input.pdf output.pdf"
+    exit 1
+  fi
+
+  input_pdf="$1"
+  output_pdf="$2"
+
+  even_pdf="even.pdf"
+  even_rotated_pdf="even_rotated.pdf"
+  landscape_pdf="landscape.pdf"
+  odd_pdf="odd.pdf"
+
+  # Convert the PDF to landscape
+  ${_pdfjam} --landscape --nup 2x1 "$input_pdf" -o "$landscape_pdf"
+
+  # Split the PDF into odd and even pages
+  ${_pdftk} "$landscape_pdf" cat odd output "$odd_pdf"
+  ${_pdftk} "$landscape_pdf" cat even output "$even_pdf"
+
+  # Rotate the even pages by 180 degrees
+  ${_pdfjam} --landscape "$even_pdf" --angle 180 --outfile "$even_rotated_pdf"
+
+  # Merge the odd and rotated even pages
+  ${_pdftk} A="$odd_pdf" B="$even_rotated_pdf" shuffle A B output "$output_pdf"
+
+  rm "$odd_pdf" "$even_pdf" "$landscape_pdf" "$even_rotated_pdf"
+''