feat(tvix/docs): switch to mdbook

Some of the docs are still outdated (like architecture and drv path
inconsistencies).

Change-Id: I7a6afceb008ef4cd19a764dd6c637b39fa842a2e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11072
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: edef <edef@edef.eu>

tvix/docs/default.nix

@@ -1,47 +1,23 @@
 { pkgs, lib, ... }:
 
-let
-
-  tl = pkgs.texlive.combine {
-    inherit (pkgs.texlive) scheme-medium wrapfig ulem capt-of
-      titlesec preprint enumitem paralist ctex environ svg
-      beamer trimspaces zhnumber changepage framed pdfpages
-      fvextra minted upquote ifplatform xstring;
-  };
-
-  csl = pkgs.fetchurl {
-    name = "numeric.csl";
-    url = "https://gist.githubusercontent.com/bwiernik/8c6f39cf51ceb3a03107/raw/1d75c2d62113ffbba6ed03a47ad99bde86934f2b/APA%2520Numeric";
-    sha256 = "1yfhhnhbzvhrv93baz98frmgsx5y442nzhb0l956l4j35fb0cc3h";
-  };
-
-in
 pkgs.stdenv.mkDerivation {
-  pname = "tvix-doc";
+  pname = "tvix-docs";
   version = "0.1";
 
-  outputs = [ "out" "svg" ];
+  outputs = [ "out" ];
 
   src = lib.cleanSource ./.;
 
-  CSL = csl;
-
   nativeBuildInputs = [
-    pkgs.pandoc
+    pkgs.mdbook
+    pkgs.mdbook-plantuml
     pkgs.plantuml
-    tl
   ];
 
-  installPhase = ''
-    runHook preInstall
-
-    mkdir -p $out
-    cp -v *.html $out/
-
-    mkdir -p $svg
-    cp -v *.svg $svg/
-
-    runHook postSubmit
+  # plantuml wants to create ./.mdbook-plantuml-cache, which fails as $src is r/o.
+  # copy all sources elsewhere to workaround.
+  buildCommand = ''
+    cp -R $src/. .
+    mdbook build -d $out
   '';
-
 }