Feature/monorepo (#24)

* refactor to include all necessary dependencies directly here * move indexer into monorepo * add snapshot tests and seperate sub.project for builtin types * add more missing builtins such as fromTOML
2024-07-07 09:16:25 +03:00 · 2023-02-25 13:14:40 +01:00 · 2023-02-25 13:14:40 +01:00 · d9f579cf44
commit d9f579cf44
parent cdbad56a42
78 changed files with 12621 additions and 213 deletions
--- a/.gitignore
+++ b/.gitignore
@ -1,47 +1,18 @@
 # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.

-# dependencies
-/node_modules
-/.pnp
-.pnp.js
+

 # testing
-/coverage
-/models/data/*
-# !/models/data/index.ts
+coverage

 # nix
 .direnv/
 result
 result-*

-
-# next.js
-/.next/
-/out/
-
-# production
-/build
-
-# misc
-.DS_Store
-*.pem
-result
-result-*
-
-# debug
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-.pnpm-debug.log*
-
-# local env files
-.env*.local
 .pre-commit-config.yaml

-# vercel
-.vercel
+# dream2nix

-# typescript
-*.tsbuildinfo
-next-env.d.ts
+## dream2nix internal cache
+.dream2nix
--- a/flake.lock
+++ b/flake.lock
@ -43,11 +43,11 @@
    "crane": {
      "flake": false,
      "locked": {
-        "lastModified": 1670284777,
-        "narHash": "sha256-JF0pc0s4z/X+Iy+lNHOwUQ8I5bz+q7uX4HrKTNIEj24=",
+        "lastModified": 1670900067,
+        "narHash": "sha256-VXVa+KBfukhmWizaiGiHRVX/fuk66P8dgSFfkVN4/MY=",
        "owner": "ipetkov",
        "repo": "crane",
-        "rev": "2243fb9c872de25cb564a02d324ea6a5b9853052",
+        "rev": "59b31b41a589c0a65e4a1f86b0e5eac68081468b",
        "type": "github"
      },
      "original": {
@ -86,14 +86,15 @@
        "nix-pypi-fetcher": "nix-pypi-fetcher",
        "nixpkgs": "nixpkgs",
        "poetry2nix": "poetry2nix",
-        "pre-commit-hooks": "pre-commit-hooks"
+        "pre-commit-hooks": "pre-commit-hooks",
+        "pruned-racket-catalog": "pruned-racket-catalog"
      },
      "locked": {
-        "lastModified": 1670559747,
-        "narHash": "sha256-yT/ofVjhgGrdFQeFONFpLNnVJa8ALMuSvlILczvIIn4=",
+        "lastModified": 1676992344,
+        "narHash": "sha256-TEn5kEi/jL9Dt6O+ZZ7kQwnlAgEv0r4VgQZnav/cfV4=",
        "owner": "nix-community",
        "repo": "dream2nix",
-        "rev": "8b4d355e8008c47791219da30fc390baf78c4099",
+        "rev": "db72710500a80bdf4589b6807d2491a4a0dae3ad",
        "type": "github"
      },
      "original": {
@ -143,14 +144,17 @@
    },
    "flake-parts": {
      "inputs": {
-        "nixpkgs-lib": "nixpkgs-lib"
+        "nixpkgs-lib": [
+          "dream2nix",
+          "nixpkgs"
+        ]
      },
      "locked": {
-        "lastModified": 1668450977,
-        "narHash": "sha256-cfLhMhnvXn6x1vPm+Jow3RiFAUSCw/l1utktCw5rVA4=",
+        "lastModified": 1675933616,
+        "narHash": "sha256-/rczJkJHtx16IFxMmAWu5nNYcSXNg1YYXTHoGjLrLUA=",
        "owner": "hercules-ci",
        "repo": "flake-parts",
-        "rev": "d591857e9d7dd9ddbfba0ea02b43b927c3c0f1fa",
+        "rev": "47478a4a003e745402acf63be7f9a092d51b83d7",
        "type": "github"
      },
      "original": {
@ -161,11 +165,11 @@
    },
    "flake-utils": {
      "locked": {
-        "lastModified": 1659877975,
-        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
        "owner": "numtide",
        "repo": "flake-utils",
-        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
        "type": "github"
      },
      "original": {
@ -189,21 +193,6 @@
        "type": "github"
      }
    },
-    "flake-utils_2": {
-      "locked": {
-        "lastModified": 1667395993,
-        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
    "flakeCompat": {
      "flake": false,
      "locked": {
@ -304,30 +293,6 @@
        "type": "github"
      }
    },
-    "nixdoc-fork": {
-      "inputs": {
-        "flake-utils": [
-          "nixdoc-fork",
-          "rust-overlay",
-          "flake-utils"
-        ],
-        "nixpkgs": "nixpkgs_2",
-        "rust-overlay": "rust-overlay"
-      },
-      "locked": {
-        "lastModified": 1675862788,
-        "narHash": "sha256-TS8YpNtYKBWP6xXrJ7DIdmJwwcCq0Tuf9NhQYWXoPXA=",
-        "owner": "hsjobeki",
-        "repo": "nixdoc",
-        "rev": "76276fdb30ab4fcbe7ba19844a2afd9447256674",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hsjobeki",
-        "repo": "nixdoc",
-        "type": "github"
-      }
-    },
    "nixpkgs": {
      "locked": {
        "lastModified": 1665580254,
@ -343,22 +308,19 @@
        "type": "indirect"
      }
    },
-    "nixpkgs-lib": {
+    "nixpkgs-master": {
      "locked": {
-        "dir": "lib",
-        "lastModified": 1665349835,
-        "narHash": "sha256-UK4urM3iN80UXQ7EaOappDzcisYIuEURFRoGQ/yPkug=",
+        "lastModified": 1677165478,
+        "narHash": "sha256-bWABTj9vlT26d3zpI+NQmuOwcXAzwJGNIgdgPfsnyk8=",
        "owner": "NixOS",
        "repo": "nixpkgs",
-        "rev": "34c5293a71ffdb2fe054eb5288adc1882c1eb0b1",
+        "rev": "21d1c5425c1c0f4b4ae6203086951164920d9fab",
        "type": "github"
      },
      "original": {
-        "dir": "lib",
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
+        "id": "nixpkgs",
+        "ref": "master",
+        "type": "indirect"
      }
    },
    "nixpkgs-stable": {
@ -379,46 +341,16 @@
    },
    "nixpkgs_2": {
      "locked": {
-        "lastModified": 1675333202,
-        "narHash": "sha256-ZcZqGz2K7V9/uIrWfdmKUfC5PkcuR29DKTqUTF5BURo=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "a2780dc543d24f33d7a2d7fa5b2bf609ed8c1849",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_3": {
-      "locked": {
-        "lastModified": 1665296151,
-        "narHash": "sha256-uOB0oxqxN9K7XGF1hcnY+PQnlQJ+3bP2vCn/+Ru/bbc=",
+        "lastModified": 1677063315,
+        "narHash": "sha256-qiB4ajTeAOVnVSAwCNEEkoybrAlA+cpeiBxLobHndE8=",
        "owner": "NixOS",
        "repo": "nixpkgs",
-        "rev": "14ccaaedd95a488dd7ae142757884d8e125b3363",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_4": {
-      "locked": {
-        "lastModified": 1675249806,
-        "narHash": "sha256-u8Rcqekusl3pMZm68hZqr6zozI8Ug5IxqOiqDLAlu1k=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "79feedf38536de2a27d13fe2eaf200a9c05193ba",
+        "rev": "988cc958c57ce4350ec248d2d53087777f9e1949",
        "type": "github"
      },
      "original": {
        "id": "nixpkgs",
+        "ref": "nixos-unstable",
        "type": "indirect"
      }
    },
@ -467,7 +399,7 @@
    "pre-commit-hooks_2": {
      "inputs": {
        "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils_2",
+        "flake-utils": "flake-utils",
        "gitignore": "gitignore",
        "nixpkgs": [
          "nixpkgs"
@ -475,11 +407,11 @@
        "nixpkgs-stable": "nixpkgs-stable"
      },
      "locked": {
-        "lastModified": 1674550893,
-        "narHash": "sha256-HXI8AB96PP7UZ7iPANACXM8qc9eMz0ljxBEDM8JJKhY=",
+        "lastModified": 1677160285,
+        "narHash": "sha256-tBzpCjMP+P3Y3nKLYvdBkXBg3KvTMo3gvi8tLQaqXVY=",
        "owner": "cachix",
        "repo": "pre-commit-hooks.nix",
-        "rev": "7bdf85f6bbef581eb687838d19f2b35a4c9d77f0",
+        "rev": "2bd861ab81469428d9c823ef72c4bb08372dd2c4",
        "type": "github"
      },
      "original": {
@ -488,11 +420,28 @@
        "type": "github"
      }
    },
+    "pruned-racket-catalog": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1672537287,
+        "narHash": "sha256-SuOvXVcLfakw18oJB/PuRMyvGyGG1+CQD3R+TGHIv44=",
+        "owner": "nix-community",
+        "repo": "pruned-racket-catalog",
+        "rev": "c8b89557fb53b36efa2ee48a769c7364df0f6262",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "catalog",
+        "repo": "pruned-racket-catalog",
+        "type": "github"
+      }
+    },
    "root": {
      "inputs": {
        "dream2nix": "dream2nix",
-        "nixdoc-fork": "nixdoc-fork",
-        "nixpkgs": "nixpkgs_4",
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-master": "nixpkgs-master",
        "pre-commit-hooks": "pre-commit-hooks_2"
      }
    },
@ -512,25 +461,6 @@
        "repo": "rust-analyzer",
        "type": "github"
      }
-    },
-    "rust-overlay": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs_3"
-      },
-      "locked": {
-        "lastModified": 1670380307,
-        "narHash": "sha256-7fJN5ndnE8YbrrtYdqMo3gDV/BW37M4wNBRhjdfP/XY=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "fc98242f5f49d39b8fd3a611c146741a35dc012d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "type": "github"
-      }
    }
  },
  "root": "root",
--- a/flake.nix
+++ b/flake.nix
@ -1,55 +1,109 @@
 {
  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+    nixpkgs-master.url = "nixpkgs/master";
+
    dream2nix.url = "github:nix-community/dream2nix";
-    nixdoc-fork.url = "github:hsjobeki/nixdoc";
+
    pre-commit-hooks = {
      url = "github:cachix/pre-commit-hooks.nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
-  outputs = { self, nixpkgs, pre-commit-hooks, ... }@inp:
+  outputs = { self, nixpkgs, pre-commit-hooks, dream2nix, nixpkgs-master }:
    let
      system = "x86_64-linux";
-      pkgs = inp.nixpkgs.legacyPackages.${system};
-      inherit (builtins.fromJSON (builtins.readFile ./package.json)) name;
-      prepareData = ''
-        cp -f ${inp.nixdoc-fork.packages.${system}.data.lib} ./models/data/lib.json
-        cp -f ${inp.nixdoc-fork.packages.${system}.data.build_support} ./models/data/trivial-builders.json
-        node ./scripts/make-builtins.js       
+      pkgs = nixpkgs.legacyPackages.${system};
+      websiteName = (builtins.fromJSON (builtins.readFile ./website/package.json)).name;
+      inherit (self.packages.${system}) indexer nixpkgs-data builtins-data;
+
+      prepareData = prefix: ''
+        cp -f ${nixpkgs-data.lib} ${prefix}/lib.json
+        cp -f ${nixpkgs-data.build_support} ${prefix}/trivial-builders.json
+        cp -f ${builtins-data}/lib/data.json ${prefix}/builtins.json
      '';
-    in
-    (inp.dream2nix.lib.makeFlakeOutputs {
-      systemsFromFile = ./nix_systems;
-      config.projectRoot = ./.;
-      source = ./.;
-      settings = [
-        {
-          subsystemInfo.nodejs = 18;
-        }
-      ];
-      packageOverrides = {
-        ${name}.staticPage = {
-          preBuild = prepareData;
-          installPhase = ''
-            runHook preInstall

-            npm run export
-            mkdir -p $out/static
-            cp -r ./out/* $out/static/         
+      dream2nixOutput = dream2nix.lib.makeFlakeOutputs {
+        systems = [ system ];
+        projects = ./projects.toml;
+        config.projectRoot = ./.;
+        source = ./.;

-            runHook postInstall
-          '';
+        packageOverrides = {
+          ${websiteName}.staticPage = {
+            preBuild = prepareData "models/data";
+            installPhase = ''
+              runHook preInstall
+
+              npm run export
+              mkdir -p $out/static
+              cp -r ./out/* $out/static/
+              cp -r ./ $lib         
+
+              runHook postInstall
+            '';
+          };
+          tests.run = {
+            installPhase = "";
+            preBuild = ''
+              ls -la 
+              mkdir -p data
+              ${prepareData "data"}
+
+            '';
+            doCheck = true;
+            checkPhase = ''
+              ls -la 
+              npm run test -- --ci
+            '';
+          };
        };
      };
-    })
-    // {
+    in
+    {
+      packages.${system} = dream2nixOutput.packages.${system} // {
+        nixpkgs-data = pkgs.stdenv.mkDerivation {
+          pname = "data";
+          version = "0.1.0";
+          description = ''
+            wrapper around the indexer. 
+
+            Calls the indexer with '<nixpkgs>'/path.
+            and defines one output for every specified input path
+
+            currently this list is manually maintained below.
+          '';
+          src = nixpkgs-master;
+          outputs = [ "out" "lib" "build_support" ];
+          nativeBuildInputs = [ indexer ];
+          buildPhase = ''
+            echo "running nix metadata collect in nixpkgs/lib"
+            ${indexer}/bin/indexer --dir ./lib
+            ${indexer}/bin/indexer --dir ./pkgs/build-support
+          '';
+          installPhase = ''
+            cat lib.json > $lib
+            cat build-support.json > $build_support
+
+            mkdir $out
+            ln -s $lib $out/lib
+            ln -s $build_support $out/build_support
+          '';
+        };
+
+        default = self.packages.${system}.noogle;
+      };
+
      devShells.${system}.default = pkgs.mkShell {
-        buildInputs = with pkgs; [ nodejs-18_x ];
+        buildInputs = with pkgs; [ nodejs-18_x rustfmt rustc cargo clippy ];
+        inputsFrom = [ indexer ];
        shellHook = ''
-          ${prepareData}
+          ${prepareData "website/models/data"}
+          ${prepareData "tests/data"}
          ${self.checks.${system}.pre-commit-check.shellHook}
        '';
      };
+
      checks.${system} = {
        pre-commit-check = pre-commit-hooks.lib.${system}.run {
          src = ./.;
@ -58,6 +112,11 @@
            statix.enable = true;
            markdownlint.enable = true;
          };
+          excludes = [ "indexer/test" ".github" "scripts/data" ];
+          settings = {
+            statix.ignore = [ "indexer/test" ];
+          };
+
        };
      };
    };
--- a/indexer/.gitignore
+++ b/indexer/.gitignore
@ -0,0 +1,4 @@
+
+target/
+**/*.rs.bk
+data.json
--- a/indexer/.travis.yml
+++ b/indexer/.travis.yml
@ -0,0 +1,2 @@
+language: nix
+sudo: true
--- a/indexer/Cargo.lock
+++ b/indexer/Cargo.lock
@ -0,0 +1,381 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "ansi_term"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "arenatree"
+version = "0.1.1"
+source = "git+https://gitlab.com/jD91mZM2/arenatree#f9bf7efa9a5ef4c2dd9e2acc5a4cc79a987cb648"
+
+[[package]]
+name = "arrayvec"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1e964f9e24d588183fcb43503abda40d288c8657dfc27311516ce2f05675aef"
+dependencies = [
+ "nodrop",
+]
+
+[[package]]
+name = "atty"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"
+dependencies = [
+ "libc",
+ "termion",
+ "winapi",
+]
+
+[[package]]
+name = "backtrace"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89a47830402e9981c5c41223151efcced65a0510c13097c769cede7efb34782a"
+dependencies = [
+ "backtrace-sys",
+ "cfg-if",
+ "libc",
+ "rustc-demangle",
+ "winapi",
+]
+
+[[package]]
+name = "backtrace-sys"
+version = "0.1.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c66d56ac8dabd07f6aacdaf633f4b8262f5b3601a810a0dcddffd5c22c69daa0"
+dependencies = [
+ "cc",
+ "libc",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
+
+[[package]]
+name = "cc"
+version = "1.0.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f159dfd43363c4d08055a07703eb7a3406b0dac4d0584d96965a3262db3c9d16"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "082bb9b28e00d3c9d39cc03e64ce4cea0f1bb9b3fde493f0cbc008472d22bdf4"
+
+[[package]]
+name = "clap"
+version = "2.32.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b957d88f4b6a63b9d70d5f454ac8011819c6efa7727858f458ab71c756ce2d3e"
+dependencies = [
+ "ansi_term",
+ "atty",
+ "bitflags",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
+]
+
+[[package]]
+name = "failure"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6dd377bcc1b1b7ce911967e3ec24fa19c3224394ec05b54aa7b083d498341ac7"
+dependencies = [
+ "backtrace",
+ "failure_derive",
+]
+
+[[package]]
+name = "failure_derive"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64c2d913fe8ed3b6c6518eedf4538255b989945c14c2a7d5cbff62a5e2120596"
+dependencies = [
+ "proc-macro2 0.4.20",
+ "quote 0.6.8",
+ "syn 0.15.15",
+ "synstructure",
+]
+
+[[package]]
+name = "indexer"
+version = "0.1.0"
+dependencies = [
+ "rnix",
+ "serde",
+ "serde_json",
+ "structopt",
+]
+
+[[package]]
+name = "itoa"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4217ad341ebadf8d8e724e264f13e593e0648f5b3e94b3896a5df283be015ecc"
+
+[[package]]
+name = "libc"
+version = "0.2.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76e3a3ef172f1a0b9a9ff0dd1491ae5e6c948b94479a3021819ba7d860c8645d"
+
+[[package]]
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+checksum = "9a2228dca57108069a5262f2ed8bd2e82496d2e074a06d1ccc7ce1687b6ae0a2"
+
+[[package]]
+name = "proc-macro2"
+version = "0.4.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d7b7eaaa90b4a90a932a9ea6666c95a389e424eff347f0f793979289429feee"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd636425967c33af890042c483632d33fa7a18f19ad1d7ea72e8998c6ef8dea5"
+dependencies = [
+ "proc-macro2 0.4.20",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+dependencies = [
+ "proc-macro2 1.0.47",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.1.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c214e91d3ecf43e9a4e41e578973adeb14b474f2bee858742d127af75a0112b1"
+
+[[package]]
+name = "redox_termios"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
+dependencies = [
+ "redox_syscall",
+]
+
+[[package]]
+name = "rnix"
+version = "0.4.1"
+source = "git+https://gitlab.com/jD91mZM2/rnix.git?rev=10b86c94291b4864470158ef8750de85ddd8d4ba#10b86c94291b4864470158ef8750de85ddd8d4ba"
+dependencies = [
+ "arenatree",
+ "arrayvec",
+ "failure",
+ "smol_str",
+]
+
+[[package]]
+name = "rustc-demangle"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bcfe5b13211b4d78e5c2cadfebd7769197d95c639c35a50057eb4c05de811395"
+
+[[package]]
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+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
+
+[[package]]
+name = "serde"
+version = "1.0.148"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e53f64bb4ba0191d6d0676e1b141ca55047d83b74f5607e6d8eb88126c52c2dc"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.148"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a55492425aa53521babf6137309e7d34c20bbfbbfcfe2c7f3a047fd1f6b92c0c"
+dependencies = [
+ "proc-macro2 1.0.47",
+ "quote 1.0.21",
+ "syn 1.0.105",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.89"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "020ff22c755c2ed3f8cf162dbb41a7268d934702f3ed3631656ea597e08fc3db"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "smol_str"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3ed6f19b800d76574926e458d5f8e2dbea86c2b58c08d33a982448f09ac8d0c"
+
+[[package]]
+name = "strsim"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb4f380125926a99e52bc279241539c018323fab05ad6368b56f93d9369ff550"
+
+[[package]]
+name = "structopt"
+version = "0.2.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d77af7242f18c40fd19cb270985930f239ee1646cfb482050bbae9da1d18743b"
+dependencies = [
+ "clap",
+ "structopt-derive",
+]
+
+[[package]]
+name = "structopt-derive"
+version = "0.2.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17ff01fe96de9d16e7372ae5f19dd7ece2c703b51043c3db9ea27f9e393ea311"
+dependencies = [
+ "proc-macro2 0.4.20",
+ "quote 0.6.8",
+ "syn 0.15.15",
+]
+
+[[package]]
+name = "syn"
+version = "0.15.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a9c2bf1e53c21704a7cce1b2a42768f1ae32a6777108a0d7f1faa4bfe7f7c04"
+dependencies = [
+ "proc-macro2 0.4.20",
+ "quote 0.6.8",
+ "unicode-xid",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.105"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60b9b43d45702de4c839cb9b51d9f529c5dd26a4aff255b42b1ebc03e88ee908"
+dependencies = [
+ "proc-macro2 1.0.47",
+ "quote 1.0.21",
+ "unicode-ident",
+]
+
+[[package]]
+name = "synstructure"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73687139bf99285483c96ac0add482c3776528beac1d97d444f6e91f203a2015"
+dependencies = [
+ "proc-macro2 0.4.20",
+ "quote 0.6.8",
+ "syn 0.15.15",
+ "unicode-xid",
+]
+
+[[package]]
+name = "termion"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
+dependencies = [
+ "libc",
+ "redox_syscall",
+ "redox_termios",
+]
+
+[[package]]
+name = "textwrap"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
+dependencies = [
+ "unicode-width",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
+
+[[package]]
+name = "unicode-xid"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
+
+[[package]]
+name = "vec_map"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
+
+[[package]]
+name = "winapi"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
--- a/indexer/Cargo.toml
+++ b/indexer/Cargo.toml
@ -0,0 +1,14 @@
+[package]
+name = "indexer"
+version = "0.1.0"
+authors = ["Johannes Kirschbauer <hsjobeki@gmail.com>"]
+edition = "2021"
+
+[dependencies]
+structopt = "0.2"
+serde_json = "1.0.89"
+serde = { version = "1.0.148", features = ["derive"] }
+
+[dependencies.rnix]
+git = "https://gitlab.com/jD91mZM2/rnix.git"
+rev = "10b86c94291b4864470158ef8750de85ddd8d4ba"
--- a/indexer/makeMarkdown.js
+++ b/indexer/makeMarkdown.js
@ -0,0 +1,36 @@
+// simple script
+// test.json in generated with  "cargo run -- --dir ./test"
+const data = require("./test.json");
+const fs = require("fs");
+
+const all_docs = data.reduce(
+  (acc, doc) => `${acc}
+## ${doc.name}
+
+### Description
+
+\`\`\`nix
+${doc.description}
+\`\`\`
+
+### Example
+
+\`\`\`nix
+${doc.example}
+\`\`\`
+
+### Type
+
+\`\`\`nix
+${doc.fn_type}
+\`\`\`
+
+`,
+  ""
+);
+
+fs.writeFile("content.md", `# Functions\n${all_docs}`, (err) => {
+  if (err) {
+    console.error(err);
+  }
+});
--- a/indexer/src/main.rs
+++ b/indexer/src/main.rs
@ -0,0 +1,286 @@
+extern crate rnix;
+extern crate serde;
+extern crate serde_json;
+extern crate structopt;
+use rnix::parser::{ASTKind, ASTNode, Arena, Data};
+use rnix::tokenizer::Trivia;
+use rnix::tokenizer::{Meta, Span};
+use serde::{Deserialize, Serialize};
+use std::fs::{self, File};
+use std::path::PathBuf;
+use structopt::StructOpt;
+
+/// Command line arguments for the indexer
+#[derive(Debug, StructOpt)]
+#[structopt(name = "indexer", about = "Generate Metadata from Nix files")]
+struct Options {
+    /// directory to process.
+    #[structopt(short = "D", long = "dir", parse(from_os_str))]
+    dir: PathBuf,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct ManualEntry {
+    pub id: String,
+    pub line: Option<usize>,
+    pub category: String,
+    pub name: String,
+    pub fn_type: Option<String>,
+    pub description: String,
+    pub example: Option<String>,
+}
+#[derive(Debug)]
+struct DocComment {
+    /// Primary documentation string.
+    doc: String,
+
+    /// Optional type annotation for the thing being documented.
+    doc_type: Option<String>,
+
+    /// Usage example(s) (interpreted as a single code block)
+    example: Option<String>,
+}
+
+#[derive(Debug)]
+struct DocItem {
+    name: String,
+    span: Span,
+    comment: DocComment,
+}
+
+/// Retrieve documentation comments. For now only multiline comments are considered
+fn retrieve_doc_comment(allow_single_line: bool, meta: &Meta) -> Option<String> {
+    for item in meta.leading.iter() {
+        if let Trivia::Comment {
+            multiline, content, ..
+        } = item
+        {
+            if *multiline || allow_single_line {
+                return Some(content.to_string());
+            }
+        }
+    }
+    return None;
+}
+
+/// Transforms an AST node into a `DocItem` if it has a leading
+/// documentation comment.
+fn retrieve_doc_item(node: &ASTNode) -> Option<DocItem> {
+    // We are only interested in identifiers.
+
+    if let Data::Ident(meta, name) = &node.data {
+        let comment = retrieve_doc_comment(false, meta)?;
+        return Some(DocItem {
+            span: node.span,
+            name: name.to_string(),
+            comment: parse_doc_comment(&comment),
+        });
+    }
+    return None;
+}
+
+fn get_indentation(line: &str) -> usize {
+    return line
+        .char_indices()
+        .find(|(_, ch)| !(ch.is_whitespace() && *ch != '\n'))
+        .map(|(i, _)| i)
+        .unwrap_or_else(|| line.len());
+}
+
+/// *Really* dumb, mutable, hacky doc comment "parser".
+fn parse_doc_comment(raw: &str) -> DocComment {
+    enum ParseState {
+        Doc,
+        Type,
+        Example,
+    }
+
+    let mut doc = String::new();
+    let mut doc_type = String::new();
+    let mut example = String::new();
+    let mut state = ParseState::Doc;
+
+    let mut type_ident = 0;
+    let mut doc_ident = 0;
+    let mut example_ident = 0;
+
+    for line in raw.clone().lines() {
+        let mut line = line.clone().trim_end();
+        let trimmed = line.clone().trim();
+        if trimmed.starts_with("Type:") {
+            state = ParseState::Type;
+            line = &trimmed[5..]; // trim 'Type:'
+        }
+
+        if trimmed.starts_with("Example:") {
+            state = ParseState::Example;
+            line = &trimmed[8..]; // trim 'Example:'
+        }
+        match state {
+            ParseState::Type => {
+                let curr_indent = get_indentation(line);
+                if curr_indent > 0 && type_ident == 0 {
+                    type_ident = curr_indent;
+                }
+            }
+            ParseState::Doc => {
+                let curr_indent = get_indentation(line);
+                if curr_indent > 0 && doc_ident == 0 {
+                    doc_ident = curr_indent;
+                }
+            }
+            ParseState::Example => {
+                let curr_indent = get_indentation(line);
+                if curr_indent > 0 && example_ident == 0 {
+                    example_ident = curr_indent;
+                }
+            }
+        }
+    }
+    state = ParseState::Doc;
+
+    for line in raw.lines() {
+        let mut line = line.trim_end();
+        let trimmed = line.clone().trim();
+        if trimmed.starts_with("Type:") {
+            state = ParseState::Type;
+            line = &trimmed[5..]; // trim 'Type:'
+        }
+
+        if trimmed.starts_with("Example:") {
+            state = ParseState::Example;
+            line = &trimmed[8..]; // trim 'Example:'
+        }
+        match state {
+            // important: trim only trailing whitespaces; as leading ones might be markdown formatting or code examples.
+            ParseState::Type => {
+                let stripped = line.trim_end();
+                let formatted = stripped.replacen(&" ".repeat(type_ident), "", 1);
+                doc_type.push_str(&formatted);
+                doc_type.push('\n');
+            }
+            ParseState::Doc => {
+                let stripped = line.trim_end();
+                let formatted = stripped.replacen(&" ".repeat(doc_ident), "", 1);
+                doc.push_str(&formatted);
+                doc.push('\n');
+            }
+            ParseState::Example => {
+                let stripped = line.trim_end();
+                let formatted = stripped.replacen(&" ".repeat(example_ident), "", 1);
+                example.push_str(&formatted);
+                example.push('\n');
+            }
+        }
+    }
+    let f = |mut s: String| {
+        if s.is_empty() {
+            None
+        } else {
+            let len = s.trim_end_matches(&['\r', '\n'][..]).len();
+            s.truncate(len);
+            return Some(s.trim_start().into());
+        }
+    };
+    // let doc_f = f(doc);
+    DocComment {
+        doc: f(doc).unwrap_or("".to_owned()),
+        doc_type: f(doc_type),
+        example: f(example),
+    }
+}
+
+fn get_line(span: Span, src: &String) -> Option<usize> {
+    let mut line_nr: usize = 1;
+    for (count, char) in src.chars().enumerate() {
+        if char == '\n' {
+            line_nr = line_nr + 1;
+        }
+        if count == span.start as usize {
+            return Some(line_nr);
+        }
+    }
+    None
+}
+
+/// Traverse a pattern argument, collecting its argument names.
+/// Traverse a Nix lambda and collect the identifiers of arguments
+/// until an unexpected AST node is encountered.
+///
+/// This will collect the argument names for curried functions in the
+/// `a: b: c: ...`-style, but does not currently work with pattern
+/// functions (`{ a, b, c }: ...`).
+///
+/// In the AST representation used by rnix, any lambda node has an
+/// immediate child that is the identifier of its argument. The "body"
+/// of the lambda is two steps to the right from that identifier, if
+/// it is a lambda the function is curried and we can recurse.
+/// Traverse the arena from a top-level SetEntry and collect, where
+/// possible:
+///
+/// 1. The identifier of the set entry itself.
+/// 2. The attached doc comment on the entry.
+/// 3. The argument names of any curried functions (pattern functions
+///    not yet supported).
+fn collect_entry_information<'a>(arena: &Arena<'a>, entry_node: &ASTNode) -> Option<DocItem> {
+    // The "root" of any attribute set entry is this `SetEntry` node.
+    // It has an `Attribute` child, which in turn has the identifier
+    // (on which the documentation comment is stored) as its child.
+    let attr_node = &arena[entry_node.node.child?];
+    let ident_node = &arena[attr_node.node.child?];
+    // At this point we can retrieve the `DocItem` from the identifier
+    // node - this already contains most of the information we are
+    // interested in.
+    let doc_item = retrieve_doc_item(ident_node)?;
+
+    // From our entry we can walk two nodes to the right and check
+    // whether we are dealing with a lambda. If so, we can start
+    // collecting the function arguments - otherwise we're done.
+    // let assign_node = &arena[attr_node.node.sibling?];
+    // let content_node = &arena[assign_node.node.sibling?];
+    Some(doc_item)
+}
+
+fn main() {
+    let opts = Options::from_args();
+    let paths = fs::read_dir(&opts.dir).unwrap();
+    let mut data: Vec<ManualEntry> = vec![];
+    for path in paths {
+        let file_path = path.unwrap();
+        let file_type = file_path.file_type().unwrap();
+        let file = file_path.path();
+        if file_type.is_file() && file.extension().unwrap() == "nix" {
+            // sources.push(file);
+            let src = fs::read_to_string(&file).unwrap();
+            let nix = rnix::parse(&src).unwrap();
+            let filename = file.file_stem().unwrap().to_str().unwrap();
+            let parent = file
+                .parent()
+                .unwrap()
+                .file_name()
+                .unwrap()
+                .to_str()
+                .unwrap();
+
+            let entries: Vec<ManualEntry> = nix
+                .arena
+                .into_iter()
+                .filter(|node| node.kind == ASTKind::SetEntry)
+                .filter_map(|node| collect_entry_information(&nix.arena, node))
+                .map(|d| ManualEntry {
+                    id: format!("{}.{}.{}", parent, filename, d.name),
+                    line: Some(get_line(d.span, &src)).unwrap_or(None),
+                    category: file.display().to_string(),
+                    name: d.name,
+                    description: d.comment.doc,
+                    fn_type: d.comment.doc_type,
+                    example: d.comment.example,
+                })
+                .collect();
+            data.extend(entries);
+        }
+    }
+    let json_file =
+        File::create(opts.dir.file_name().unwrap().to_str().unwrap().to_owned() + ".json").unwrap();
+    ::serde_json::to_writer(&json_file, &data).unwrap();
+}
--- a/indexer/test/types.nix
+++ b/indexer/test/types.nix
@ -0,0 +1,987 @@
+# Definitions related to run-time type checking.  Used in particular
+# to type-check NixOS configurations.
+{ lib }:
+
+let
+  inherit (lib)
+    elem
+    flip
+    isAttrs
+    isBool
+    isDerivation
+    isFloat
+    isFunction
+    isInt
+    isList
+    isString
+    isStorePath
+    toDerivation
+    toList
+    ;
+  inherit (lib.lists)
+    all
+    concatLists
+    count
+    elemAt
+    filter
+    foldl'
+    head
+    imap1
+    last
+    length
+    tail
+    ;
+  inherit (lib.attrsets)
+    attrNames
+    filterAttrs
+    hasAttr
+    mapAttrs
+    optionalAttrs
+    zipAttrsWith
+    ;
+  inherit (lib.options)
+    getFiles
+    getValues
+    mergeDefaultOption
+    mergeEqualOption
+    mergeOneOption
+    mergeUniqueOption
+    showFiles
+    showOption
+    ;
+  inherit (lib.strings)
+    concatMapStringsSep
+    concatStringsSep
+    escapeNixString
+    hasInfix
+    isStringLike
+    ;
+  inherit (lib.trivial)
+    boolToString
+    ;
+
+  inherit (lib.modules)
+    mergeDefinitions
+    fixupOptionType
+    mergeOptionDecls
+    ;
+  outer_types =
+rec {
+  isType = type: x: (x._type or "") == type;
+
+  setType = typeName: value: value // {
+    _type = typeName;
+  };
+
+
+  /* Default type merging function
+    takes two type functors and return the merged type
+
+  */
+  defaultTypeMerge = f: f':
+    let wrapped = f.wrapped.typeMerge f'.wrapped.functor;
+        payload = f.binOp f.payload f'.payload;
+    in
+    # cannot merge different types
+    if f.name != f'.name
+       then null
+    # simple types
+    else if    (f.wrapped == null && f'.wrapped == null)
+            && (f.payload == null && f'.payload == null)
+       then f.type
+    # composed types
+    else if (f.wrapped != null && f'.wrapped != null) && (wrapped != null)
+       then f.type wrapped
+    # value types
+    else if (f.payload != null && f'.payload != null) && (payload != null)
+       then f.type payload
+    else null;
+
+  /* Default type functor */
+  defaultFunctor = name: {
+    inherit name;
+    type    = types.${name} or null;
+    wrapped = null;
+    payload = null;
+    binOp   = a: b: null;
+  };
+
+  isOptionType = isType "option-type";
+  /*
+   Function that creates an optionType to be used in the module system.
+
+   Example:
+
+   Type:
+    {
+      name :: String;
+      description :: String ?;
+      descriptionClass :: "noun" | "conjunction" | "composite" ?;
+      check :: (a -> Bool) ?;
+      merge :: 
+      emptyValue :: {} ?;
+      getSubOptions :: ( [String] -> {}) ?;
+      getSubModules :: ( [Module] ) ?;
+      substSubModules :: ( [Module] ) ?;
+      typeMerge :: 
+      functor :: 
+      deprecationMessage :: 
+      nestedTypes :: 
+    } 
+    ->
+    { 
+      name :: String
+        name check merge emptyValue getSubOptions getSubModules substSubModules
+        typeMerge functor deprecationMessage nestedTypes descriptionClass;
+      description = if description == null then name else description;
+
+      _type :: "option-type";
+    };
+
+  */
+  mkOptionType =
+    { # Human-readable representation of the type, should be equivalent to
+      # the type function name.
+      name
+    , # Description of the type, defined recursively by embedding the wrapped type if any.
+      description ? null
+      # A hint for whether or not this description needs parentheses. Possible values:
+      #  - "noun": a simple noun phrase such as "positive integer"
+      #  - "conjunction": a phrase with a potentially ambiguous "or" connective.
+      #  - "composite": a phrase with an "of" connective
+      # See the `optionDescriptionPhrase` function.
+    , descriptionClass ? null
+    , # DO NOT USE WITHOUT KNOWING WHAT YOU ARE DOING!
+      # Function applied to each definition that must return false when a definition
+      # does not match the type. It should not check more than the root of the value,
+      # because checking nested values reduces laziness, leading to unnecessary
+      # infinite recursions in the module system.
+      # Further checks of nested values should be performed by throwing in
+      # the merge function.
+      # Strict and deep type checking can be performed by calling lib.deepSeq on
+      # the merged value.
+      #
+      # See https://github.com/NixOS/nixpkgs/pull/6794 that introduced this change,
+      # https://github.com/NixOS/nixpkgs/pull/173568 and
+      # https://github.com/NixOS/nixpkgs/pull/168295 that attempted to revert this,
+      # https://github.com/NixOS/nixpkgs/issues/191124 and
+      # https://github.com/NixOS/nixos-search/issues/391 for what happens if you ignore
+      # this disclaimer.
+      check ? (x: true)
+    , # Merge a list of definitions together into a single value.
+      # This function is called with two arguments: the location of
+      # the option in the configuration as a list of strings
+      # (e.g. ["boot" "loader "grub" "enable"]), and a list of
+      # definition values and locations (e.g. [ { file = "/foo.nix";
+      # value = 1; } { file = "/bar.nix"; value = 2 } ]).
+      merge ? mergeDefaultOption
+    , # Whether this type has a value representing nothingness. If it does,
+      # this should be a value of the form { value = <the nothing value>; }
+      # If it doesn't, this should be {}
+      # This may be used when a value is required for `mkIf false`. This allows the extra laziness in e.g. `lazyAttrsOf`.
+      emptyValue ? {}
+    , # Return a flat list of sub-options.  Used to generate
+      # documentation.
+      getSubOptions ? prefix: {}
+    , # List of modules if any, or null if none.
+      getSubModules ? null
+    , # Function for building the same option type with a different list of
+      # modules.
+      substSubModules ? m: null
+    , # Function that merge type declarations.
+      # internal, takes a functor as argument and returns the merged type.
+      # returning null means the type is not mergeable
+      typeMerge ? defaultTypeMerge functor
+    , # The type functor.
+      # internal, representation of the type as an attribute set.
+      #   name: name of the type
+      #   type: type function.
+      #   wrapped: the type wrapped in case of compound types.
+      #   payload: values of the type, two payloads of the same type must be
+      #            combinable with the binOp binary operation.
+      #   binOp: binary operation that merge two payloads of the same type.
+      functor ? defaultFunctor name
+    , # The deprecation message to display when this type is used by an option
+      # If null, the type isn't deprecated
+      deprecationMessage ? null
+    , # The types that occur in the definition of this type. This is used to
+      # issue deprecation warnings recursively. Can also be used to reuse
+      # nested types
+      nestedTypes ? {}
+    }:
+    { _type = "option-type";
+      inherit
+        name check merge emptyValue getSubOptions getSubModules substSubModules
+        typeMerge functor deprecationMessage nestedTypes descriptionClass;
+      description = if description == null then name else description;
+    };
+
+  # optionDescriptionPhrase :: (str -> bool) -> optionType -> str
+  #
+  # Helper function for producing unambiguous but readable natural language
+  # descriptions of types.
+  #
+  # Parameters
+  #
+  #     optionDescriptionPhase unparenthesize optionType
+  #
+  # `unparenthesize`: A function from descriptionClass string to boolean.
+  #   It must return true when the class of phrase will fit unambiguously into
+  #   the description of the caller.
+  #
+  # `optionType`: The option type to parenthesize or not.
+  #   The option whose description we're returning.
+  #
+  # Return value
+  #
+  # The description of the `optionType`, with parentheses if there may be an
+  # ambiguity.
+  optionDescriptionPhrase = unparenthesize: t:
+    if unparenthesize (t.descriptionClass or null)
+    then t.description
+    else "(${t.description})";
+
+  # When adding new types don't forget to document them in
+  # nixos/doc/manual/development/option-types.xml!
+  types = rec {
+    /*
+      Can be anything. 
+
+      Merge behavior: None; Merging is disabled.
+      
+    */
+    raw = mkOptionType rec {
+      name = "raw";
+      description = "raw value";
+      descriptionClass = "noun";
+      check = value: true;
+      merge = mergeOneOption;
+    };
+    /*
+      Can be anything. 
+
+      Merge behavior: Custom Logic
+    */
+    anything = mkOptionType {
+      name = "anything";
+      description = "anything";
+      descriptionClass = "noun";
+      check = value: true;
+      merge = loc: defs:
+        let
+          getType = value:
+            if isAttrs value && isStringLike value
+            then "stringCoercibleSet"
+            else builtins.typeOf value;
+
+          # Returns the common type of all definitions, throws an error if they
+          # don't have the same type
+          commonType = foldl' (type: def:
+            if getType def.value == type
+            then type
+            else throw "The option `${showOption loc}' has conflicting option types in ${showFiles (getFiles defs)}"
+          ) (getType (head defs).value) defs;
+
+          mergeFunction = {
+            # Recursively merge attribute sets
+            set = (attrsOf anything).merge;
+            # Safe and deterministic behavior for lists is to only accept one definition
+            # listOf only used to apply mkIf and co.
+            list =
+              if length defs > 1
+              then throw "The option `${showOption loc}' has conflicting definitions, in ${showFiles (getFiles defs)}."
+              else (listOf anything).merge;
+            # This is the type of packages, only accept a single definition
+            stringCoercibleSet = mergeOneOption;
+            lambda = loc: defs: arg: anything.merge
+              (loc ++ [ "<function body>" ])
+              (map (def: {
+                file = def.file;
+                value = def.value arg;
+              }) defs);
+            # Otherwise fall back to only allowing all equal definitions
+          }.${commonType} or mergeEqualOption;
+        in mergeFunction loc defs;
+    };
+
+    /*
+      Can be anything.
+
+      Merge behavior: Default logic
+    */
+    unspecified = mkOptionType {
+      name = "unspecified";
+      description = "unspecified value";
+      descriptionClass = "noun";
+    };
+
+
+    /*
+      Allows Boolean values
+
+      Merge behavior: Enabled; see lib.mergeEqualOption;
+    */
+    bool = mkOptionType {
+      name = "bool";
+      description = "boolean";
+      descriptionClass = "noun";
+      check = isBool;
+      merge = mergeEqualOption;
+    };
+
+    int = mkOptionType {
+      name = "int";
+      description = "signed integer";
+      descriptionClass = "noun";
+      check = isInt;
+      merge = mergeEqualOption;
+    };
+
+    /* Specialized subdomains of int
+
+      - ints.between
+      - ints.unsigned
+      - ints.u8
+      - ints.u16
+      - ints.u32
+      - ints.s8
+      - ints.s16
+      - ints.s32
+
+
+      Example:
+        (ints.between 0 100).check (-1)
+        => false
+        (ints.between 0 100).check (101)
+        => false
+        (ints.between 0 0).check 0
+        => true 
+    */
+    ints =
+      let
+        betweenDesc = lowest: highest:
+          "${toString lowest} and ${toString highest} (both inclusive)";
+        between = lowest: highest:
+          assert lib.assertMsg (lowest <= highest)
+            "ints.between: lowest must be smaller than highest";
+          addCheck int (x: x >= lowest && x <= highest) // {
+            name = "intBetween";
+            description = "integer between ${betweenDesc lowest highest}";
+          };
+        ign = lowest: highest: name: docStart:
+          between lowest highest // {
+            inherit name;
+            description = docStart + "; between ${betweenDesc lowest highest}";
+          };
+        unsign = bit: range: ign 0 (range - 1)
+          "unsignedInt${toString bit}" "${toString bit} bit unsigned integer";
+        sign = bit: range: ign (0 - (range / 2)) (range / 2 - 1)
+          "signedInt${toString bit}" "${toString bit} bit signed integer";
+
+      in {
+        /* An int with a fixed range.
+        
+         Example:
+           (ints.between 0 100).check (-1)
+           => false
+           (ints.between 0 100).check (101)
+           => false
+           (ints.between 0 0).check 0
+           => true
+        */
+        inherit between;
+
+        unsigned = addCheck types.int (x: x >= 0) // {
+          name = "unsignedInt";
+          description = "unsigned integer, meaning >=0";
+        };
+        positive = addCheck types.int (x: x > 0) // {
+          name = "positiveInt";
+          description = "positive integer, meaning >0";
+        };
+        u8 = unsign 8 256;
+        u16 = unsign 16 65536;
+        # the biggest int Nix accepts is 2^63 - 1 (9223372036854775808)
+        # the smallest int Nix accepts is -2^63 (-9223372036854775807)
+        u32 = unsign 32 4294967296;
+        # u64 = unsign 64 18446744073709551616;
+
+        s8 = sign 8 256;
+        s16 = sign 16 65536;
+        s32 = sign 32 4294967296;
+      };
+
+    /*
+      Port number can be unsigned 16 bit 
+      
+      from 0 to 65536
+      
+      Alias of ints.u16 for a port number. -> See tye.ints for more infos.
+    */ 
+    port = ints.u16;
+
+    /*
+      A Float number
+
+      For more information about validation see: lib.isFloat
+
+      Merge behavior: Enabled; see lib.mergeEqualOption
+    */
+    float = mkOptionType {
+      name = "float";
+      description = "floating point number";
+      descriptionClass = "noun";
+      check = isFloat;
+      merge = mergeEqualOption;
+    };
+
+    /*
+      Can be either an Int or a Float
+
+
+
+    */
+    number = either int float;
+
+    numbers = let
+      betweenDesc = lowest: highest:
+        "${builtins.toJSON lowest} and ${builtins.toJSON highest} (both inclusive)";
+    in {
+      between = lowest: highest:
+        assert lib.assertMsg (lowest <= highest)
+          "numbers.between: lowest must be smaller than highest";
+        addCheck number (x: x >= lowest && x <= highest) // {
+          name = "numberBetween";
+          description = "integer or floating point number between ${betweenDesc lowest highest}";
+        };
+
+      nonnegative = addCheck number (x: x >= 0) // {
+        name = "numberNonnegative";
+        description = "nonnegative integer or floating point number, meaning >=0";
+      };
+      positive = addCheck number (x: x > 0) // {
+        name = "numberPositive";
+        description = "positive integer or floating point number, meaning >0";
+      };
+    };
+
+    str = mkOptionType {
+      name = "str";
+      description = "string";
+      descriptionClass = "noun";
+      check = isString;
+      merge = mergeEqualOption;
+    };
+
+    nonEmptyStr = mkOptionType {
+      name = "nonEmptyStr";
+      description = "non-empty string";
+      descriptionClass = "noun";
+      check = x: str.check x && builtins.match "[ \t\n]*" x == null;
+      inherit (str) merge;
+    };
+
+    # Allow a newline character at the end and trim it in the merge function.
+    singleLineStr =
+      let
+        inherit (strMatching "[^\n\r]*\n?") check merge;
+      in
+      mkOptionType {
+        name = "singleLineStr";
+        description = "(optionally newline-terminated) single-line string";
+        descriptionClass = "noun";
+        inherit check;
+        merge = loc: defs:
+          lib.removeSuffix "\n" (merge loc defs);
+      };
+
+    strMatching = pattern: mkOptionType {
+      name = "strMatching ${escapeNixString pattern}";
+      description = "string matching the pattern ${pattern}";
+      descriptionClass = "noun";
+      check = x: str.check x && builtins.match pattern x != null;
+      inherit (str) merge;
+    };
+
+    # Merge multiple definitions by concatenating them (with the given
+    # separator between the values).
+    separatedString = sep: mkOptionType rec {
+      name = "separatedString";
+      description = if sep == ""
+        then "Concatenated string" # for types.string.
+        else "strings concatenated with ${builtins.toJSON sep}"
+      ;
+      descriptionClass = "noun";
+      check = isString;
+      merge = loc: defs: concatStringsSep sep (getValues defs);
+      functor = (defaultFunctor name) // {
+        payload = sep;
+        binOp = sepLhs: sepRhs:
+          if sepLhs == sepRhs then sepLhs
+          else null;
+      };
+    };
+
+    lines = separatedString "\n";
+    commas = separatedString ",";
+    envVar = separatedString ":";
+
+    # Deprecated; should not be used because it quietly concatenates
+    # strings, which is usually not what you want.
+    string = separatedString "" // {
+      name = "string";
+      deprecationMessage = "See https://github.com/NixOS/nixpkgs/pull/66346 for better alternative types.";
+    };
+
+    passwdEntry = entryType: addCheck entryType (str: !(hasInfix ":" str || hasInfix "\n" str)) // {
+      name = "passwdEntry ${entryType.name}";
+      description = "${optionDescriptionPhrase (class: class == "noun") entryType}, not containing newlines or colons";
+    };
+
+    attrs = mkOptionType {
+      name = "attrs";
+      description = "attribute set";
+      check = isAttrs;
+      merge = loc: foldl' (res: def: res // def.value) {};
+      emptyValue = { value = {}; };
+    };
+
+    /* 
+      A package is a top-level store path (/nix/store/hash-name). This includes:
+      
+      - derivations
+      - more generally, attribute sets with an `outPath` or `__toString` attribute
+        pointing to a store path, e.g. flake inputs
+      - strings with context, e.g. "${pkgs.foo}" or (toString pkgs.foo)
+      - hardcoded store path literals (/nix/store/hash-foo) or strings without context
+        ("/nix/store/hash-foo"). These get a context added to them using builtins.storePath.
+    */
+    package = mkOptionType {
+      name = "package";
+      descriptionClass = "noun";
+      check = x: isDerivation x || isStorePath x;
+      merge = loc: defs:
+        let res = mergeOneOption loc defs;
+        in if builtins.isPath res || (builtins.isString res && ! builtins.hasContext res)
+          then toDerivation res
+          else res;
+    };
+
+    shellPackage = package // {
+      check = x: isDerivation x && hasAttr "shellPath" x;
+    };
+
+    path = mkOptionType {
+      name = "path";
+      descriptionClass = "noun";
+      check = x: isStringLike x && builtins.substring 0 1 (toString x) == "/";
+      merge = mergeEqualOption;
+    };
+
+    listOf = elemType: mkOptionType rec {
+      name = "listOf";
+      description = "list of ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";
+      descriptionClass = "composite";
+      check = isList;
+      merge = loc: defs:
+        map (x: x.value) (filter (x: x ? value) (concatLists (imap1 (n: def:
+          imap1 (m: def':
+            (mergeDefinitions
+              (loc ++ ["[definition ${toString n}-entry ${toString m}]"])
+              elemType
+              [{ inherit (def) file; value = def'; }]
+            ).optionalValue
+          ) def.value
+        ) defs)));
+      emptyValue = { value = []; };
+      getSubOptions = prefix: elemType.getSubOptions (prefix ++ ["*"]);
+      getSubModules = elemType.getSubModules;
+      substSubModules = m: listOf (elemType.substSubModules m);
+      functor = (defaultFunctor name) // { wrapped = elemType; };
+      nestedTypes.elemType = elemType;
+    };
+
+    nonEmptyListOf = elemType:
+      let list = addCheck (types.listOf elemType) (l: l != []);
+      in list // {
+        description = "non-empty ${optionDescriptionPhrase (class: class == "noun") list}";
+        emptyValue = { }; # no .value attr, meaning unset
+      };
+
+    attrsOf = elemType: mkOptionType rec {
+      name = "attrsOf";
+      description = "attribute set of ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";
+      descriptionClass = "composite";
+      check = isAttrs;
+      merge = loc: defs:
+        mapAttrs (n: v: v.value) (filterAttrs (n: v: v ? value) (zipAttrsWith (name: defs:
+            (mergeDefinitions (loc ++ [name]) elemType defs).optionalValue
+          )
+          # Push down position info.
+          (map (def: mapAttrs (n: v: { inherit (def) file; value = v; }) def.value) defs)));
+      emptyValue = { value = {}; };
+      getSubOptions = prefix: elemType.getSubOptions (prefix ++ ["<name>"]);
+      getSubModules = elemType.getSubModules;
+      substSubModules = m: attrsOf (elemType.substSubModules m);
+      functor = (defaultFunctor name) // { wrapped = elemType; };
+      nestedTypes.elemType = elemType;
+    };
+
+    # A version of attrsOf that's lazy in its values at the expense of
+    # conditional definitions not working properly. E.g. defining a value with
+    # `foo.attr = mkIf false 10`, then `foo ? attr == true`, whereas with
+    # attrsOf it would correctly be `false`. Accessing `foo.attr` would throw an
+    # error that it's not defined. Use only if conditional definitions don't make sense.
+    lazyAttrsOf = elemType: mkOptionType rec {
+      name = "lazyAttrsOf";
+      description = "lazy attribute set of ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";
+      descriptionClass = "composite";
+      check = isAttrs;
+      merge = loc: defs:
+        zipAttrsWith (name: defs:
+          let merged = mergeDefinitions (loc ++ [name]) elemType defs;
+          # mergedValue will trigger an appropriate error when accessed
+          in merged.optionalValue.value or elemType.emptyValue.value or merged.mergedValue
+        )
+        # Push down position info.
+        (map (def: mapAttrs (n: v: { inherit (def) file; value = v; }) def.value) defs);
+      emptyValue = { value = {}; };
+      getSubOptions = prefix: elemType.getSubOptions (prefix ++ ["<name>"]);
+      getSubModules = elemType.getSubModules;
+      substSubModules = m: lazyAttrsOf (elemType.substSubModules m);
+      functor = (defaultFunctor name) // { wrapped = elemType; };
+      nestedTypes.elemType = elemType;
+    };
+
+    # TODO: deprecate this in the future:
+    loaOf = elemType: types.attrsOf elemType // {
+      name = "loaOf";
+      deprecationMessage = "Mixing lists with attribute values is no longer"
+        + " possible; please use `types.attrsOf` instead. See"
+        + " https://github.com/NixOS/nixpkgs/issues/1800 for the motivation.";
+      nestedTypes.elemType = elemType;
+    };
+
+    # Value of given type but with no merging (i.e. `uniq list`s are not concatenated).
+    uniq = elemType: mkOptionType rec {
+      name = "uniq";
+      inherit (elemType) description descriptionClass check;
+      merge = mergeOneOption;
+      emptyValue = elemType.emptyValue;
+      getSubOptions = elemType.getSubOptions;
+      getSubModules = elemType.getSubModules;
+      substSubModules = m: uniq (elemType.substSubModules m);
+      functor = (defaultFunctor name) // { wrapped = elemType; };
+      nestedTypes.elemType = elemType;
+    };
+
+    unique = { message }: type: mkOptionType rec {
+      name = "unique";
+      inherit (type) description descriptionClass check;
+      merge = mergeUniqueOption { inherit message; };
+      emptyValue = type.emptyValue;
+      getSubOptions = type.getSubOptions;
+      getSubModules = type.getSubModules;
+      substSubModules = m: uniq (type.substSubModules m);
+      functor = (defaultFunctor name) // { wrapped = type; };
+      nestedTypes.elemType = type;
+    };
+
+    # Null or value of ...
+    nullOr = elemType: mkOptionType rec {
+      name = "nullOr";
+      description = "null or ${optionDescriptionPhrase (class: class == "noun" || class == "conjunction") elemType}";
+      descriptionClass = "conjunction";
+      check = x: x == null || elemType.check x;
+      merge = loc: defs:
+        let nrNulls = count (def: def.value == null) defs; in
+        if nrNulls == length defs then null
+        else if nrNulls != 0 then
+          throw "The option `${showOption loc}` is defined both null and not null, in ${showFiles (getFiles defs)}."
+        else elemType.merge loc defs;
+      emptyValue = { value = null; };
+      getSubOptions = elemType.getSubOptions;
+      getSubModules = elemType.getSubModules;
+      substSubModules = m: nullOr (elemType.substSubModules m);
+      functor = (defaultFunctor name) // { wrapped = elemType; };
+      nestedTypes.elemType = elemType;
+    };
+
+    functionTo = elemType: mkOptionType {
+      name = "functionTo";
+      description = "function that evaluates to a(n) ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";
+      descriptionClass = "composite";
+      check = isFunction;
+      merge = loc: defs:
+        fnArgs: (mergeDefinitions (loc ++ [ "<function body>" ]) elemType (map (fn: { inherit (fn) file; value = fn.value fnArgs; }) defs)).mergedValue;
+      getSubOptions = prefix: elemType.getSubOptions (prefix ++ [ "<function body>" ]);
+      getSubModules = elemType.getSubModules;
+      substSubModules = m: functionTo (elemType.substSubModules m);
+      functor = (defaultFunctor "functionTo") // { wrapped = elemType; };
+      nestedTypes.elemType = elemType;
+    };
+
+    # A submodule (like typed attribute set). See NixOS manual.
+    submodule = modules: submoduleWith {
+      shorthandOnlyDefinesConfig = true;
+      modules = toList modules;
+    };
+
+    # A module to be imported in some other part of the configuration.
+    deferredModule = deferredModuleWith { };
+
+    # A module to be imported in some other part of the configuration.
+    # `staticModules`' options will be added to the documentation, unlike
+    # options declared via `config`.
+    deferredModuleWith = attrs@{ staticModules ? [] }: mkOptionType {
+      name = "deferredModule";
+      description = "module";
+      descriptionClass = "noun";
+      check = x: isAttrs x || isFunction x || path.check x;
+      merge = loc: defs: {
+        imports = staticModules ++ map (def: lib.setDefaultModuleLocation "${def.file}, via option ${showOption loc}" def.value) defs;
+      };
+      inherit (submoduleWith { modules = staticModules; })
+        getSubOptions
+        getSubModules;
+      substSubModules = m: deferredModuleWith (attrs // {
+        staticModules = m;
+      });
+      functor = defaultFunctor "deferredModuleWith" // {
+        type = types.deferredModuleWith;
+        payload = {
+          inherit staticModules;
+        };
+        binOp = lhs: rhs: {
+          staticModules = lhs.staticModules ++ rhs.staticModules;
+        };
+      };
+    };
+
+    # The type of a type!
+    optionType = mkOptionType {
+      name = "optionType";
+      description = "optionType";
+      descriptionClass = "noun";
+      check = value: value._type or null == "option-type";
+      merge = loc: defs:
+        if length defs == 1
+        then (head defs).value
+        else let
+          # Prepares the type definitions for mergeOptionDecls, which
+          # annotates submodules types with file locations
+          optionModules = map ({ value, file }:
+            {
+              _file = file;
+              # There's no way to merge types directly from the module system,
+              # but we can cheat a bit by just declaring an option with the type
+              options = lib.mkOption {
+                type = value;
+              };
+            }
+          ) defs;
+          # Merges all the types into a single one, including submodule merging.
+          # This also propagates file information to all submodules
+          mergedOption = fixupOptionType loc (mergeOptionDecls loc optionModules);
+        in mergedOption.type;
+    };
+
+    submoduleWith =
+      { modules
+      , specialArgs ? {}
+      , shorthandOnlyDefinesConfig ? false
+      , description ? null
+      }@attrs:
+      let
+        inherit (lib.modules) evalModules;
+
+        allModules = defs: map ({ value, file }:
+          if isAttrs value && shorthandOnlyDefinesConfig
+          then { _file = file; config = value; }
+          else { _file = file; imports = [ value ]; }
+        ) defs;
+
+        base = evalModules {
+          inherit specialArgs;
+          modules = [{
+            # This is a work-around for the fact that some sub-modules,
+            # such as the one included in an attribute set, expects an "args"
+            # attribute to be given to the sub-module. As the option
+            # evaluation does not have any specific attribute name yet, we
+            # provide a default for the documentation and the freeform type.
+            #
+            # This is necessary as some option declaration might use the
+            # "name" attribute given as argument of the submodule and use it
+            # as the default of option declarations.
+            #
+            # We use lookalike unicode single angle quotation marks because
+            # of the docbook transformation the options receive. In all uses
+            # &gt; and &lt; wouldn't be encoded correctly so the encoded values
+            # would be used, and use of `<` and `>` would break the XML document.
+            # It shouldn't cause an issue since this is cosmetic for the manual.
+            _module.args.name = lib.mkOptionDefault "‹name›";
+          }] ++ modules;
+        };
+
+        freeformType = base._module.freeformType;
+
+        name = "submodule";
+
+      in
+      mkOptionType {
+        inherit name;
+        description =
+          if description != null then description
+          else freeformType.description or name;
+        check = x: isAttrs x || isFunction x || path.check x;
+        merge = loc: defs:
+          (base.extendModules {
+            modules = [ { _module.args.name = last loc; } ] ++ allModules defs;
+            prefix = loc;
+          }).config;
+        emptyValue = { value = {}; };
+        getSubOptions = prefix: (base.extendModules
+          { inherit prefix; }).options // optionalAttrs (freeformType != null) {
+            # Expose the sub options of the freeform type. Note that the option
+            # discovery doesn't care about the attribute name used here, so this
+            # is just to avoid conflicts with potential options from the submodule
+            _freeformOptions = freeformType.getSubOptions prefix;
+          };
+        getSubModules = modules;
+        substSubModules = m: submoduleWith (attrs // {
+          modules = m;
+        });
+        nestedTypes = lib.optionalAttrs (freeformType != null) {
+          freeformType = freeformType;
+        };
+        functor = defaultFunctor name // {
+          type = types.submoduleWith;
+          payload = {
+            inherit modules specialArgs shorthandOnlyDefinesConfig description;
+          };
+          binOp = lhs: rhs: {
+            modules = lhs.modules ++ rhs.modules;
+            specialArgs =
+              let intersecting = builtins.intersectAttrs lhs.specialArgs rhs.specialArgs;
+              in if intersecting == {}
+              then lhs.specialArgs // rhs.specialArgs
+              else throw "A submoduleWith option is declared multiple times with the same specialArgs \"${toString (attrNames intersecting)}\"";
+            shorthandOnlyDefinesConfig =
+              if lhs.shorthandOnlyDefinesConfig == null
+              then rhs.shorthandOnlyDefinesConfig
+              else if rhs.shorthandOnlyDefinesConfig == null
+              then lhs.shorthandOnlyDefinesConfig
+              else if lhs.shorthandOnlyDefinesConfig == rhs.shorthandOnlyDefinesConfig
+              then lhs.shorthandOnlyDefinesConfig
+              else throw "A submoduleWith option is declared multiple times with conflicting shorthandOnlyDefinesConfig values";
+            description =
+              if lhs.description == null
+              then rhs.description
+              else if rhs.description == null
+              then lhs.description
+              else if lhs.description == rhs.description
+              then lhs.description
+              else throw "A submoduleWith option is declared multiple times with conflicting descriptions";
+          };
+        };
+      };
+
+    # A value from a set of allowed ones.
+    enum = values:
+      let
+        inherit (lib.lists) unique;
+        show = v:
+               if builtins.isString v then ''"${v}"''
+          else if builtins.isInt v then builtins.toString v
+          else if builtins.isBool v then boolToString v
+          else ''<${builtins.typeOf v}>'';
+      in
+      mkOptionType rec {
+        name = "enum";
+        description =
+          # Length 0 or 1 enums may occur in a design pattern with type merging
+          # where an "interface" module declares an empty enum and other modules
+          # provide implementations, each extending the enum with their own
+          # identifier.
+          if values == [] then
+            "impossible (empty enum)"
+          else if builtins.length values == 1 then
+            "value ${show (builtins.head values)} (singular enum)"
+          else
+            "one of ${concatMapStringsSep ", " show values}";
+        descriptionClass =
+          if builtins.length values < 2
+          then "noun"
+          else "conjunction";
+        check = flip elem values;
+        merge = mergeEqualOption;
+        functor = (defaultFunctor name) // { payload = values; binOp = a: b: unique (a ++ b); };
+      };
+
+    # Either value of type `t1` or `t2`.
+    either = t1: t2: mkOptionType rec {
+      name = "either";
+      description = "${optionDescriptionPhrase (class: class == "noun" || class == "conjunction") t1} or ${optionDescriptionPhrase (class: class == "noun" || class == "conjunction" || class == "composite") t2}";
+      descriptionClass = "conjunction";
+      check = x: t1.check x || t2.check x;
+      merge = loc: defs:
+        let
+          defList = map (d: d.value) defs;
+        in
+          if   all (x: t1.check x) defList
+               then t1.merge loc defs
+          else if all (x: t2.check x) defList
+               then t2.merge loc defs
+          else mergeOneOption loc defs;
+      typeMerge = f':
+        let mt1 = t1.typeMerge (elemAt f'.wrapped 0).functor;
+            mt2 = t2.typeMerge (elemAt f'.wrapped 1).functor;
+        in
+           if (name == f'.name) && (mt1 != null) && (mt2 != null)
+           then functor.type mt1 mt2
+           else null;
+      functor = (defaultFunctor name) // { wrapped = [ t1 t2 ]; };
+      nestedTypes.left = t1;
+      nestedTypes.right = t2;
+    };
+
+    # Any of the types in the given list
+    oneOf = ts:
+      let
+        head' = if ts == [] then throw "types.oneOf needs to get at least one type in its argument" else head ts;
+        tail' = tail ts;
+      in foldl' either head' tail';
+
+    # Either value of type `coercedType` or `finalType`, the former is
+    # converted to `finalType` using `coerceFunc`.
+    coercedTo = coercedType: coerceFunc: finalType:
+      assert lib.assertMsg (coercedType.getSubModules == null)
+        "coercedTo: coercedType must not have submodules (it’s a ${
+          coercedType.description})";
+      mkOptionType rec {
+        name = "coercedTo";
+        description = "${optionDescriptionPhrase (class: class == "noun") finalType} or ${optionDescriptionPhrase (class: class == "noun") coercedType} convertible to it";
+        check = x: (coercedType.check x && finalType.check (coerceFunc x)) || finalType.check x;
+        merge = loc: defs:
+          let
+            coerceVal = val:
+              if coercedType.check val then coerceFunc val
+              else val;
+          in finalType.merge loc (map (def: def // { value = coerceVal def.value; }) defs);
+        emptyValue = finalType.emptyValue;
+        getSubOptions = finalType.getSubOptions;
+        getSubModules = finalType.getSubModules;
+        substSubModules = m: coercedTo coercedType coerceFunc (finalType.substSubModules m);
+        typeMerge = t1: t2: null;
+        functor = (defaultFunctor name) // { wrapped = finalType; };
+        nestedTypes.coercedType = coercedType;
+        nestedTypes.finalType = finalType;
+      };
+
+    # Augment the given type with an additional type check function.
+    addCheck = elemType: check: elemType // { check = x: elemType.check x && check x; };
+
+  };
+};
+
+in outer_types // outer_types.types
--- a/1
+++ b/1
@ -1 +0,0 @@
-x86_64-linux
--- a/projects.toml
+++ b/projects.toml
@ -0,0 +1,57 @@
+# projects.toml file describing inputs for dream2nix
+#
+# To re-generate this file, run:
+#   nix run .#detect-projects $source
+# ... where `$source` points to the source of your project.
+#
+# If the local flake is unavailable, alternatively execute the app from the
+# upstream dream2nix flake:
+#   nix run github:nix-community/dream2nix#detect-projects $source
+
+[noogle]
+name = "noogle"
+relPath = "website"
+subsystem = "nodejs"
+translator = "package-lock"
+builder = "strict-builder"
+translators = ["package-lock", "package-json"]
+
+[noogle.subsystemInfo]
+nodejs = 18
+
+[indexer]
+name = "indexer"
+relPath = "indexer"
+subsystem = "rust"
+translator = "cargo-lock"
+translators = ["cargo-lock", "cargo-toml"]
+
+[indexer.subsystemInfo]
+workspaceMembers = []
+[[indexer.subsystemInfo.crates]]
+name = "indexer"
+relPath = "indexer"
+version = "0.1.0"
+
+[builtins-data]
+name = "builtins-data"
+relPath = "scripts"
+subsystem = "nodejs"
+translator = "package-lock"
+builder = "strict-builder"
+translators = ["package-lock", "package-json"]
+
+[builtins-data.subsystemInfo]
+nodejs = 18
+
+
+[tests]
+name = "tests"
+relPath = "tests"
+subsystem = "nodejs"
+translator = "package-lock"
+builder = "strict-builder"
+translators = ["package-lock", "package-json"]
+
+[tests.subsystemInfo]
+nodejs = 18
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@ -0,0 +1,2 @@
+data.json
+node_modules
--- a/scripts/data/builtins-names.json
+++ b/scripts/data/builtins-names.json
@ -0,0 +1,114 @@
+[
+  "abort",
+  "add",
+  "addErrorContext",
+  "all",
+  "any",
+  "appendContext",
+  "attrNames",
+  "attrValues",
+  "baseNameOf",
+  "bitAnd",
+  "bitOr",
+  "bitXor",
+  "break",
+  "builtins",
+  "catAttrs",
+  "ceil",
+  "compareVersions",
+  "concatLists",
+  "concatMap",
+  "concatStringsSep",
+  "currentSystem",
+  "currentTime",
+  "deepSeq",
+  "derivation",
+  "derivationStrict",
+  "dirOf",
+  "div",
+  "elem",
+  "elemAt",
+  "false",
+  "fetchGit",
+  "fetchMercurial",
+  "fetchTarball",
+  "fetchTree",
+  "fetchurl",
+  "filter",
+  "filterSource",
+  "findFile",
+  "floor",
+  "foldl'",
+  "fromJSON",
+  "fromTOML",
+  "functionArgs",
+  "genList",
+  "genericClosure",
+  "getAttr",
+  "getContext",
+  "getEnv",
+  "getFlake",
+  "groupBy",
+  "hasAttr",
+  "hasContext",
+  "hashFile",
+  "hashString",
+  "head",
+  "import",
+  "intersectAttrs",
+  "isAttrs",
+  "isBool",
+  "isFloat",
+  "isFunction",
+  "isInt",
+  "isList",
+  "isNull",
+  "isPath",
+  "isString",
+  "langVersion",
+  "length",
+  "lessThan",
+  "listToAttrs",
+  "map",
+  "mapAttrs",
+  "match",
+  "mul",
+  "nixPath",
+  "nixVersion",
+  "null",
+  "parseDrvName",
+  "partition",
+  "path",
+  "pathExists",
+  "placeholder",
+  "readDir",
+  "readFile",
+  "removeAttrs",
+  "replaceStrings",
+  "scopedImport",
+  "seq",
+  "sort",
+  "split",
+  "splitVersion",
+  "storeDir",
+  "storePath",
+  "stringLength",
+  "sub",
+  "substring",
+  "tail",
+  "throw",
+  "toFile",
+  "toJSON",
+  "toPath",
+  "toString",
+  "toXML",
+  "trace",
+  "traceVerbose",
+  "true",
+  "tryEval",
+  "typeOf",
+  "unsafeDiscardOutputDependency",
+  "unsafeDiscardStringContext",
+  "unsafeGetAttrPos",
+  "zipAttrsWith"
+]
--- a/scripts/data/builtins.types.json
+++ b/scripts/data/builtins.types.json
@ -108,5 +108,9 @@
  "typeOf": { "fn_type": "typeOf :: a -> String" },
  "zipAttrsWith": {
    "fn_type": "zipAttrsWith :: (String -> [a] ) -> [a] -> AttrSet"
+  },
+
+  "fromTOML": {
+    "fn_type": "fromTOML :: String -> { Any }"
  }
 }
--- a/scripts/data/fromTOML.md
+++ b/scripts/data/fromTOML.md
@ -0,0 +1,32 @@
+# Parse a TOML-configuration from String
+
+```
+builtins.fromTOML ''
+# Toplevel
+foo = "bar"
+
+# Simple Attrset
+[set]
+info = "foobar"
+
+# Nested Attrset
+[set.nested]
+meta = 42
+''
+-> 
+{
+  foo = "bar";
+  set = {
+    info = "foobar";
+    nested = {
+      meta = 42;
+    };
+  };
+}
+```
+
+Also works nicely with `readFile`:
+
+```
+builtins.fromTOML (builtins.readFile ./config.toml)
+```
--- a/scripts/data/more.json
+++ b/scripts/data/more.json
@ -0,0 +1,47 @@
+{
+  "addErrorContext": {
+    "args": ["s", "c"],
+    "arity": 2,
+    "doc": ""
+  },
+  "appendContext": {
+    "args": ["s", "c"],
+    "arity": 2,
+    "doc": ""
+  },
+  "builtins": {
+    "args": [],
+    "arity": 0,
+    "doc": "The set `builtins` contains all the built-in functions and values.\nYou can use `builtins` to test for the availability of features in\nthe Nix installation, e.g.,\n\n```nix\nif builtins ? getEnv then builtins.getEnv \"PATH\" else \"\"\n```\n\nThis allows a Nix expression to fall back gracefully on older Nix\ninstallations that don’t have the desired built-in function."
+  },
+  "currentSystem": {
+    "args": [],
+    "arity": 0,
+    "doc": "The built-in value `currentSystem` evaluates to the Nix platform\nidentifier for the Nix installation on which the expression is being\nevaluated, such as `\"i686-linux\"` or `\"x86_64-darwin\"`."
+  },
+  "currentTime": {
+    "args": [],
+    "arity": 0,
+    "doc": "The built-in value `currentSystem` evaluates to the current seconds since Jan 01 1970. (UTC)."
+  },
+  "false": {
+    "args": [],
+    "arity": 0,
+    "doc": "The built-in boolean value `false`."
+  },
+  "true": {
+    "args": [],
+    "arity": 0,
+    "doc": "The built-in boolean value `true`."
+  },
+  "null": {
+    "args": [],
+    "arity": 0,
+    "doc": "The built-in value `null`."
+  },
+  "fromTOML": {
+    "args": ["s"],
+    "arity": 1,
+    "doc": "# Parse a TOML-configuration from String\n\n```\nbuiltins.fromTOML ''\n# Toplevel\nfoo = \"bar\"\n\n# Simple Attrset\n[set]\ninfo = \"foobar\"\n\n# Nested Attrset\n[set.nested]\nmeta = 42\n''\n-> \n{\n  foo = \"bar\";\n  set = {\n    info = \"foobar\";\n    nested = {\n      meta = 42;\n    };\n  };\n}\n```\n\nAlso works nicely with `readFile`:\n\n```\nbuiltins.fromTOML (builtins.readFile ./config.toml)\n```\n"
+  }
+}
--- a/scripts/make-builtins.js
+++ b/scripts/make-builtins.js
@ -1,25 +1,59 @@
 const builtins = require("./data/builtins.json");
+const names = require("./data/builtins-names.json");
 const types = require("./data/builtins.types.json");
-const derivation = require("./data/derivation.json");
-builtins["derivation"] = derivation.derivation;
-
 const fs = require("fs");
-const info = Object.entries(builtins).map(([name, meta]) => {
-  const fn_type = types[name]?.fn_type || null;
-  const { args, arity, doc } = meta;
-  return {
-    id: `builtins.${name}`,
-    category: "builtins",
-    fn_type,
-    name,
-    description: [
-      `takes ${arity} arguments: __\`${args.join("` `")}\`__ \n`,
-      `${doc}\n`,
-    ],
-  };
-});
-fs.writeFile("./models/data/builtins.json", JSON.stringify(info), (err) => {
-  if (err) {
-    console.error(err);
-  }
+const { exit } = require("process");
+
+const { derivation } = require("./data/derivation.json");
+
+const more = require("./data/more.json");
+
+builtins["derivation"] = derivation;
+
+Object.entries(more).forEach((e) => {
+  const [name, meta] = e;
+  builtins[name] = meta;
 });
+
+const DATA_PATH = process.argv.length >= 3 && process.argv[2];
+
+if (!DATA_PATH) {
+  console.error("argument OUT_PATH is not set");
+  console.info("usage: node make-builtins.js <OUT_PATH>");
+  exit(1);
+} else {
+  let leftover = names;
+  const info = Object.entries(builtins).map(([name, meta]) => {
+    leftover = leftover.filter((e) => e !== name);
+    const fn_type = types[name]?.fn_type || null;
+    const { args, arity, doc } = meta;
+    console.log(
+      "arity:" +
+        `${
+          arity > 0
+            ? `takes ${arity} arguments: __\`${args.join("` `")}\`__ \n`
+            : ""
+        }`
+    );
+    return {
+      id: `builtins.${name}`,
+      category: "builtins",
+      fn_type,
+      name,
+      description: [
+        `${
+          arity > 0
+            ? `takes ${arity} arguments: __\`${args.join("` `")}\`__ \n`
+            : ""
+        }`,
+        `${doc}\n`,
+      ],
+    };
+  });
+  console.log({ leftover });
+  fs.writeFile(`${DATA_PATH}/data.json`, JSON.stringify(info), (err) => {
+    if (err) {
+      console.error(err);
+    }
+  });
+}
--- a/scripts/package.json
+++ b/scripts/package.json
@ -0,0 +1,11 @@
+{
+  "name": "builtins-data",
+  "version": "1.0.0",
+  "description": "",
+  "main": "make-builtins.js",
+  "scripts": {
+    "build": "node ./make-builtins.js ./"
+  },
+  "author": "",
+  "license": "ISC"
+}
--- a/tests/.gitignore
+++ b/tests/.gitignore
@ -0,0 +1,3 @@
+
+node_modules
+data/*
--- a/tests/snapshots/data.test.js.snap
+++ b/tests/snapshots/data.test.js.snap
--- a/tests/data.test.js
+++ b/tests/data.test.js
@ -0,0 +1,13 @@
+import libData from "./data/lib.json";
+import trivialBuilders from "./data/trivial-builders.json";
+import builtins from "./data/builtins.json";
+
+it("has not changed lib data", () => {
+  expect(libData).toMatchSnapshot();
+});
+it("has not changed trivial-builders data", () => {
+  expect(trivialBuilders).toMatchSnapshot();
+});
+it("has not changed builtins data", () => {
+  expect(builtins).toMatchSnapshot();
+});
--- a/tests/jest.config.js
+++ b/tests/jest.config.js
@ -0,0 +1,10 @@
+/** @type {import('jest').Config} */
+
+import { defaults } from "jest-config";
+
+const config = {
+  ...defaults,
+  // transform: {},
+};
+
+export default config;
--- a/tests/package-lock.json
+++ b/tests/package-lock.json
--- a/tests/package.json
+++ b/tests/package.json
@ -0,0 +1,15 @@
+{
+  "name": "tests",
+  "version": "1.0.0",
+  "description": "",
+  "module": "index.js",
+  "type": "module",
+  "scripts": {
+    "test": "NODE_OPTIONS=--experimental-vm-modules npx jest"
+  },
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "jest": "^29.4.3"
+  }
+}
--- a/website/.eslintrc.json
+++ b/website/.eslintrc.json
--- a/website/.gitignore
+++ b/website/.gitignore
@ -0,0 +1,44 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+node_modules
+.pnp
+.pnp.js
+
+# testing
+coverage
+/models/data/*
+!/models/data/index.ts
+
+# nix
+.direnv/
+
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+result
+result-*
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
--- a/website/components/NixFunctions/index.ts
+++ b/website/components/NixFunctions/index.ts
--- a/website/components/NixFunctions/nixFunctions.tsx
+++ b/website/components/NixFunctions/nixFunctions.tsx
--- a/website/components/basicList/basicList.tsx
+++ b/website/components/basicList/basicList.tsx
--- a/website/components/basicList/index.tsx
+++ b/website/components/basicList/index.tsx
--- a/website/components/codeHighlight/codeHighlight.module.css
+++ b/website/components/codeHighlight/codeHighlight.module.css
--- a/website/components/codeHighlight/codeHighlight.tsx
+++ b/website/components/codeHighlight/codeHighlight.tsx
@ -15,10 +15,10 @@ export const CodeHighlight = (props: CodeHighlightProps) => {
  const { theme, code, lang, background } = props;
  useEffect(() => {
    if (theme === "dark") {
-      // @ts-ignore - dont check type of css module
+      // @ts-ignore - don't check type of css module
      import("highlight.js/styles/github-dark.css");
    } else {
-      // @ts-ignore - dont check type of css module
+      // @ts-ignore - don't check type of css module
      import("highlight.js/styles/github.css");
    }
  }, [theme]);
--- a/website/components/codeHighlight/index.ts
+++ b/website/components/codeHighlight/index.ts
--- a/website/components/emptyRecordsPlaceholder/emptyRecordsPlaceholder.tsx
+++ b/website/components/emptyRecordsPlaceholder/emptyRecordsPlaceholder.tsx
--- a/website/components/emptyRecordsPlaceholder/index.tsx
+++ b/website/components/emptyRecordsPlaceholder/index.tsx
--- a/website/components/functionItem/functionItem.tsx
+++ b/website/components/functionItem/functionItem.tsx
--- a/website/components/functionOfTheDay/functionOfTheDay.tsx
+++ b/website/components/functionOfTheDay/functionOfTheDay.tsx
--- a/website/components/functionOfTheDay/index.ts
+++ b/website/components/functionOfTheDay/index.ts
--- a/website/components/image/image.tsx
+++ b/website/components/image/image.tsx
--- a/website/components/image/index.tsx
+++ b/website/components/image/index.tsx
--- a/website/components/layout/index.ts
+++ b/website/components/layout/index.ts
--- a/website/components/layout/layout.tsx
+++ b/website/components/layout/layout.tsx
--- a/website/components/markdownPreview/MarkdownPreview.tsx
+++ b/website/components/markdownPreview/MarkdownPreview.tsx
--- a/website/components/markdownPreview/index.ts
+++ b/website/components/markdownPreview/index.ts
--- a/website/components/pageContext/index.ts
+++ b/website/components/pageContext/index.ts
--- a/website/components/pageContext/pageContext.tsx
+++ b/website/components/pageContext/pageContext.tsx
--- a/website/components/preview/index.tsx
+++ b/website/components/preview/index.tsx
--- a/website/components/preview/preview.tsx
+++ b/website/components/preview/preview.tsx
--- a/website/components/searchInput/index.tsx
+++ b/website/components/searchInput/index.tsx
--- a/website/components/searchInput/searchInput.tsx
+++ b/website/components/searchInput/searchInput.tsx
--- a/website/components/selectOption/index.ts
+++ b/website/components/selectOption/index.ts
--- a/website/components/selectOption/selectOption.tsx
+++ b/website/components/selectOption/selectOption.tsx
--- a/website/createEmotionCache.ts
+++ b/website/createEmotionCache.ts
--- a/website/models/data/index.ts
+++ b/website/models/data/index.ts
--- a/website/models/internals.ts
+++ b/website/models/internals.ts
--- a/website/models/nix.ts
+++ b/website/models/nix.ts
--- a/website/next.config.js
+++ b/website/next.config.js
--- a/website/package-lock.json
+++ b/website/package-lock.json
--- a/website/package.json
+++ b/website/package.json
@ -1,5 +1,5 @@
 {
-  "name": "nextapp",
+  "name": "noogle",
  "version": "0.1.0",
  "private": true,
  "scripts": {
--- a/website/pages/_app.tsx
+++ b/website/pages/_app.tsx
--- a/website/pages/index.tsx
+++ b/website/pages/index.tsx
--- a/website/public/favicon.ico
+++ b/website/public/favicon.ico
--- a/website/public/favicon.png
+++ b/website/public/favicon.png
--- a/website/public/nix-snowflake.svg
+++ b/website/public/nix-snowflake.svg
--- a/website/public/search.xml
+++ b/website/public/search.xml
--- a/website/public/vercel.svg
+++ b/website/public/vercel.svg
--- a/website/public/white.svg
+++ b/website/public/white.svg
--- a/website/queries/byQuery.ts
+++ b/website/queries/byQuery.ts
--- a/website/queries/byType.ts
+++ b/website/queries/byType.ts
--- a/website/queries/index.ts
+++ b/website/queries/index.ts
--- a/website/queries/lib.ts
+++ b/website/queries/lib.ts
--- a/website/styles/globals.css
+++ b/website/styles/globals.css
--- a/website/styles/theme/darkThemeOptions.ts
+++ b/website/styles/theme/darkThemeOptions.ts
--- a/website/styles/theme/index.tsx
+++ b/website/styles/theme/index.tsx
--- a/website/styles/theme/lightThemeOptions.ts
+++ b/website/styles/theme/lightThemeOptions.ts
--- a/website/tsconfig.json
+++ b/website/tsconfig.json
--- a/website/types/basicDataView.ts
+++ b/website/types/basicDataView.ts