pdfmaker

Author: functora

nix/pdfmaker.nix

@@ -0,0 +1,44 @@
+let
+  pkgs = import ./nixpkgs.nix;
+in
+  pkgs.writeShellApplication {
+    name = "pdfmaker";
+    text = ''
+      set -euo pipefail
+
+      INPUT="$1"
+      BASENAME="$(basename "$INPUT" .md)"
+      OUTPUT="$BASENAME.pdf"
+
+      TMP="$(mktemp -d)"
+      WORK="$TMP/processed.md"
+      cp "$INPUT" "$WORK"
+
+      LINKS=$(sed -n 's/.*(\(http[^)]*\)).*/\1/p' "$INPUT" | sort -u)
+
+      i=1
+      for URL in $LINKS; do
+          PNG="$TMP/qr_$i.png"
+          PDF="$TMP/qr_$i.pdf"
+
+          qrencode -o "$PNG" -s 3 -m 1 "$URL"
+
+          magick "$PNG" "$PDF"
+
+          ESCAPED=$(printf '%s\n' "$URL" | sed -e 's/[\/&]/\\&/g')
+          sed -i "s|($ESCAPED)|($ESCAPED)\n\n![]($PDF){ width=2cm }|g" "$WORK"
+
+          i=$((i+1))
+      done
+
+      pandoc "$WORK" --standalone --pdf-engine=xelatex -o "$OUTPUT"
+    '';
+
+    runtimeInputs = with pkgs; [
+      pandoc
+      busybox
+      qrencode
+      texliveSmall
+      imagemagick
+    ];
+  }