add source to nvfetch of tree-sitter lib

pkgs/helix/runtime/default.nix

@@ -1,105 +0,0 @@
-{ lib, pkgs, ... }:
-let
-  inherit (pkgs) stdenv;
-  buildGrammar =
-    grammar:
-    let
-      source = sources."${grammar.name}";
-    in
-    stdenv.mkDerivation {
-      pname = "helix-tree-sitter-${grammar.name}";
-      version = grammar.rev;
-      src = source;
-      sourceRoot = "source";
-
-      dontConfigue = true;
-
-      FLAGS = [
-        "-Isrc"
-        "-g"
-        "-O3"
-        "-fPIC"
-        "-fno-exceptions"
-        "-Wl,-z,relro,-z,now"
-      ];
-
-      NAME = grammar.name;
-
-      buildPhase = ''
-        runHook preBuild
-
-        if [[ -e src/scanner.cc ]]; then
-          $CXX -c src/scanner.cc -o scanner.o $FLAGS
-        elif [[ -e src/scanner.c ]]; then
-          $CC -c src/scanner.c -o scanner.o $FLAGS
-        fi
-
-        $CC -c src/parser.c -o parser.o $FLAGS
-        $CXX -shared -o $NAME.so *.o
-
-        ls -al
-
-        runHook postBuild
-      '';
-
-      installPhase = ''
-        runHook preInstall
-
-        mkdir $out
-        mv $NAME.so $out/
-
-        runHook postInstall
-      '';
-
-      fixupPhase = lib.optionalString stdenv.isLinux ''
-        runHook preFixup
-
-        $STRIP $out/$NAME.so
-
-        runHook postFixup
-      '';
-    };
-  grammars = map (file: import file) grammarFiles;
-  sources = lib.listToAttrs (
-    map (grammar: {
-      inherit (grammar) name;
-      value = builtins.fetchTree {
-        type = "github";
-        inherit (grammar) owner repo rev;
-      };
-    }) grammars
-  );
-  queries = lib.mapAttrsToList (name: value: ''
-    mkdir -p $out/${name}
-
-    ln -s ${value}/queries/* $out/${name}/
-  '') sources;
-  builtGrammars = lib.listToAttrs (
-    map (grammar: {
-      inherit (grammar) name;
-      value = buildGrammar grammar;
-    }) grammars
-  );
-  grammarLinks = lib.mapAttrsToList (
-    name: value: "ln -s ${value}/${name}.so $out/${name}.so"
-  ) builtGrammars;
-  grammarDir = pkgs.runCommandNoCCLocal "helix-grammars" { } ''
-    mkdir -p $out
-
-    ${builtins.concatStringsSep "\n" grammarLinks}
-  '';
-  queryDir = pkgs.runCommandNoCCLocal "helix-query" { } ''
-    mkdir -p $out
-
-    ${builtins.concatStringsSep "\n" queries}
-  '';
-  grammarFiles = [
-    ./idris.nix
-  ];
-in
-pkgs.runCommandNoCCLocal "helix-runtime" { } ''
-  mkdir -p $out
-
-  ln -s ${grammarDir} $out/grammars
-  ln -s ${queryDir} $out/queries
-''