hosts/ahmed: Move hellohtml definiton into repo

4 files changed, 123 insertions, 146 deletions

diff --git a/flake.lock b/flake.lock
index 5d4a5c1..f541a33 100644
--- a/flake.lock
+++ b/flake.lock
@@ -65,73 +65,6 @@
         "type": "github"
       }
     },
-    "deno2nix": {
-      "inputs": {
-        "devshell": "devshell",
-        "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils_2",
-        "nixpkgs": [
-          "hellohtml",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1694341738,
-        "narHash": "sha256-zEosA90LiNd3/EFpZNKs7XPdY7PIsat19I6uJb/MuYU=",
-        "owner": "SnO2WMaN",
-        "repo": "deno2nix",
-        "rev": "38dcc186763ab930acd1d751b4bfe3c0bd606ef3",
-        "type": "github"
-      },
-      "original": {
-        "owner": "SnO2WMaN",
-        "repo": "deno2nix",
-        "type": "github"
-      }
-    },
-    "devshell": {
-      "inputs": {
-        "flake-utils": [
-          "hellohtml",
-          "deno2nix",
-          "flake-utils"
-        ],
-        "nixpkgs": [
-          "hellohtml",
-          "deno2nix",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1667210711,
-        "narHash": "sha256-IoErjXZAkzYWHEpQqwu/DeRNJGFdR7X2OGbkhMqMrpw=",
-        "owner": "numtide",
-        "repo": "devshell",
-        "rev": "96a9dd12b8a447840cc246e17a47b81a4268bba7",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "devshell",
-        "type": "github"
-      }
-    },
-    "flake-compat": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1668681692,
-        "narHash": "sha256-Ht91NGdewz8IQLtWZ9LCeNXMSXHUss+9COoqu6JLmXU=",
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "rev": "009399224d5e398d03b22badca40a37ac85412a1",
-        "type": "github"
-      },
-      "original": {
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -151,43 +84,10 @@
       }
     },
     "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"
-      }
-    },
-    "flake-utils_3": {
       "inputs": {
         "systems": "systems_2"
       },
       "locked": {
-        "lastModified": 1701680307,
-        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "flake-utils_4": {
-      "inputs": {
-        "systems": "systems_3"
-      },
-      "locked": {
         "lastModified": 1694529238,
         "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
         "owner": "numtide",
@@ -201,28 +101,6 @@
         "type": "github"
       }
     },
-    "hellohtml": {
-      "inputs": {
-        "deno2nix": "deno2nix",
-        "flake-utils": "flake-utils_3",
-        "nixpkgs": [
-          "nixpkgs-unstable"
-        ]
-      },
-      "locked": {
-        "lastModified": 1703882017,
-        "narHash": "sha256-2pu26Y+0oZfnbQ7/4KFUBzWYXj3PMkpkxIKaMI/xWAw=",
-        "owner": "linnnus",
-        "repo": "hellohtml",
-        "rev": "57bcf2dd89d5f863520410278b9666725f2f9f77",
-        "type": "github"
-      },
-      "original": {
-        "owner": "linnnus",
-        "repo": "hellohtml",
-        "type": "github"
-      }
-    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -318,7 +196,7 @@
     },
     "push-notification-api": {
       "inputs": {
-        "flake-utils": "flake-utils_4",
+        "flake-utils": "flake-utils_2",
         "nixpkgs": [
           "nixpkgs"
         ]
@@ -341,7 +219,6 @@
       "inputs": {
         "agenix": "agenix",
         "comma": "comma",
-        "hellohtml": "hellohtml",
         "home-manager": "home-manager_2",
         "nix-darwin": "nix-darwin",
         "nixpkgs": "nixpkgs",
@@ -378,21 +255,6 @@
         "repo": "default",
         "type": "github"
       }
-    },
-    "systems_3": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 10d0c9a..1698f2d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,11 +27,6 @@
       url = "github:linnnus/comma-zsh";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    hellohtml = {
-      url = "github:linnnus/hellohtml";
-      # url = "path:/home/linus/hellohtml";
-      inputs.nixpkgs.follows = "nixpkgs-unstable";
-    };
   };
 
   outputs = {
@@ -41,7 +36,6 @@
     nix-darwin,
     agenix,
     push-notification-api,
-    hellohtml,
     ...
   } @ inputs: let
     args = {
@@ -94,7 +88,6 @@
             home-manager.nixosModules.home-manager
             agenix.nixosModules.default
             push-notification-api.nixosModules.default
-            hellohtml.nixosModules.default
             ./hosts/ahmed/configuration.nix
             ./hosts/common.nix
             ./home
diff --git a/modules/nixos/default.nix b/modules/nixos/default.nix
index 4651c56..1393627 100644
--- a/modules/nixos/default.nix
+++ b/modules/nixos/default.nix
@@ -4,6 +4,7 @@
     on-demand-minecraft = import ./on-demand-minecraft;
     cloudflare-proxy = import ./cloudflare-proxy;
     disable-screen = import ./disable-screen;
+    hellohtml = import ./hellohtml;
   };
 
   personal = {
diff --git a/modules/nixos/hellohtml/default.nix b/modules/nixos/hellohtml/default.nix
new file mode 100644
index 0000000..294244e
--- /dev/null
+++ b/modules/nixos/hellohtml/default.nix
@@ -0,0 +1,121 @@
+{ config, lib, pkgs, ... }:
+
+# FIXME: It is wasteful to always run the service. We should run on-demand instead.
+#        This is usually achieved using SystemD sockets [4] but we are blocked on missing
+#        features in Deno [1, 5].
+#
+#        We have to be able to listen on a socket that's already been created by binding
+#        an open file descriptor (or listening on stdin) [3]. This is not possible in Deno
+#        as it is now [1, 2, 6].
+#
+#        Once it becomes a possibility, we should mirror the way push-notification-api works
+#        as of b9ed407 [8, 7].
+#
+#        [1]: https://github.com/denoland/deno/issues/6529
+#        [2]: https://github.com/denoland/deno/blob/1dd1aba2448c6c8a5a0370c4066a68aca06b859b/ext/net/ops_unix.rs#L207C34-L207C34
+#        [3]: https://www.freedesktop.org/software/systemd/man/latest/systemd.socket.html#Description:~:text=Note%20that%20the,the%20service%20file).
+#        [4]: https://www.freedesktop.org/software/systemd/man/latest/systemd.socket.html#Description:~:text=Socket%20units%20may%20be%20used%20to%20implement%20on%2Ddemand%20starting%20of%20services%2C%20as%20well%20as%20parallelized%20starting%20of%20services.%20See%20the%20blog%20stories%20linked%20at%20the%20end%20for%20an%20introduction.
+#        [5]: https://github.com/denoland/deno/issues/14214
+#        [6]: https://github.com/tokio-rs/tokio/issues/5678
+#        [7]: https://github.com/benoitc/gunicorn/blob/660fd8d850f9424d5adcd50065e6060832a200d4/gunicorn/arbiter.py#L142-L155
+#        [8]: https://github.com/linnnus/push-notification-api/tree/b9ed4071a4500a26b3b348a7f5fbc549e9694562
+
+let
+  cfg = config.services.hellohtml;
+in
+{
+  options.services.hellohtml = {
+    enable = lib.mkEnableOption "hellohtml service";
+
+    port = lib.mkOption {
+      description = "The port where hellohtml should listen.";
+      type = lib.types.port;
+      default = 8538;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    # Create a user for running service.
+    users.users.hellohtml = {
+      group = "hellohtml";
+      description = "Runs hellohtml service";
+      isSystemUser = true;
+      home = "/srv/hellohtml";
+      createHome = true; # Store DB here.
+    };
+    users.groups.hellohtml = { };
+
+    # Create hellohtml service.
+    systemd.services.hellohtml = {
+      description = "HelloHTML server!!!";
+
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+
+      serviceConfig =
+        let
+          src = pkgs.fetchFromGitHub {
+            owner = "linnnus";
+            repo = "hellohtml";
+            rev = "8505b271f0db4e8b26c95fe04855ce88954d67f7";
+            hash = "sha256-om8w8K6EVxQ0Hn6VkCPtrc1qV48BpHzPQckOLpAiosI=";
+          };
+
+          hellohtml-vendor = pkgs.stdenv.mkDerivation {
+            name = "hellohtml-vendor";
+            nativeBuildInputs = [ pkgs.unstable.deno ];
+            inherit src;
+            buildCommand = ''
+              # Deno wants to create cache directories.
+              HOME="$(mktemp -d)"
+              # Thought this wasn't necessary???
+              cd $src
+              # Build directory containing offline deps + import map.
+              deno vendor --output=$out ./src/server.ts
+            '';
+            outputHashAlgo = "sha256";
+            outputHashMode = "recursive";
+            outputHash = "sha256-TMijSneZhvkAQb6TXF5mgf+nAcYogEfNYYpnui6i7PI";
+          };
+
+          hellohtml-drv = pkgs.writeShellScript "hellohtml" ''
+            export HELLOHTML_DB_PATH="${config.users.users.hellohtml.home}"/hello.db
+            export HELLOHTML_PORT=${toString cfg.port}
+            export HELLOHTML_BASE_DIR="${src}"
+
+            ${pkgs.unstable.deno}/bin/deno run \
+              --allow-read=$HELLOHTML_BASE_DIR,$HELLOHTML_DB_PATH,. \
+              --allow-write=$HELLOHTML_DB_PATH \
+              --allow-net=0.0.0.0:$HELLOHTML_PORT \
+              --allow-env \
+              --no-prompt \
+              --unstable-kv \
+              --import-map=${hellohtml-vendor}/import_map.json \
+              --no-remote \
+              ${src}/src/server.ts
+          '';
+        in
+        {
+          Type = "simple";
+          User = config.users.users.hellohtml.name;
+          Group = config.users.users.hellohtml.group;
+          ExecStart = "${hellohtml-drv}";
+
+          # Harden service
+          # NoNewPrivileges = "yes";
+          # PrivateTmp = "yes";
+          # PrivateDevices = "yes";
+          # DevicePolicy = "closed";
+          # ProtectControlGroups = "yes";
+          # ProtectKernelModules = "yes";
+          # ProtectKernelTunables = "yes";
+          # RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6 AF_NETLINK";
+          # RestrictNamespaces = "yes";
+          # RestrictRealtime = "yes";
+          # RestrictSUIDSGID = "yes";
+          # MemoryDenyWriteExecute = "yes";
+          # LockPersonality = "yes";
+        };
+    };
+  };
+}