1 files changed, 71 insertions, 0 deletions
diff --git a/users/grfn/gws.fyi/orgExportHTML.nix b/users/grfn/gws.fyi/orgExportHTML.nix
new file mode 100644
index 000000000000..1daec45b9f97
--- /dev/null
+++ b/users/grfn/gws.fyi/orgExportHTML.nix
@@ -0,0 +1,71 @@
+{ pkgs, depot, ... }:
+
+with pkgs;
+with lib;
+
+let
+
+  emacsWithPackages = (pkgs.emacsPackagesFor pkgs.emacs27).emacsWithPackages;
+
+  emacs = emacsWithPackages (p: with p; [
+    org
+  ]);
+
+in
+
+opts:
+
+let
+  src = if isAttrs opts then opts.src else opts;
+  headline = if isAttrs opts then opts.headline else null;
+
+  bn = builtins.baseNameOf src;
+  filename = elemAt (splitString "." bn) 0;
+
+  outName =
+    if isNull headline
+    then
+      let
+        bn = builtins.baseNameOf src;
+        filename = elemAt (splitString "." bn) 0;
+      in
+      if depot.nix.utils.isDirectory src
+      then filename
+      else filename + ".html"
+    else "${filename}-${replaceStrings [" "] ["-"] filename}.html";
+
+  escapeDoubleQuotes = replaceStrings [ "\"" ] [ "\\\"" ];
+
+  navToHeadline = optionalString (! isNull headline) ''
+    (search-forward "${escapeDoubleQuotes headline}")
+    (org-narrow-to-subtree)
+  '';
+
+in
+
+runCommand outName { inherit src; } ''
+  buildFile() {
+    cp "$1" file.org
+    ${emacs}/bin/emacs --batch \
+      --load ${./config.el} \
+      --visit file.org \
+      --eval "(progn
+        ${escapeDoubleQuotes navToHeadline}
+        (org-html-export-to-html))" \
+      --kill
+    rm file.org
+    substitute file.html "$2" \
+      --replace '<title>&lrm;</title>' ""
+    rm file.html
+  }
+
+  if [ -d $src ]; then
+    for file in $src/*; do
+      result=''${file/$src/$out}
+      mkdir -p $(dirname $result)
+      buildFile $file ''${result/.org/.html}
+    done
+  else
+    buildFile $src $out
+  fi
+''