Add inquisitor configs

configuration.nix

@@ -12,6 +12,7 @@
       ./redstring.nix
       ./catacomb.nix
       ./gitea.nix
+      ./inquisitor.nix
     ];
 
   # Use the GRUB 2 boot loader.

inquisitor.nix

@@ -0,0 +1,138 @@
+{pkgs, ...}:
+
+let
+  # Import the inquisitor package and build it
+  inquisitorSource = pkgs.fetchFromGitHub {
+    owner = "Jaculabilis";
+    repo = "Inquisitor";
+    rev = "a6d961aba948d3a682dbde12dbaa8805eadbbd84";
+    sha256 = "10n6c5zvi27f92b7am0rrdizxz0mlp3rw1y1jyd44b57ykk7x6fr";
+  };
+  inquisitor = pkgs.callPackage inquisitorSource {};
+
+  # Define the inquisitor data directory
+  inquisiDir = "/var/lib/inquisitor";
+
+  # Define an scp helper for executing in cron jobs
+  scp-helper = pkgs.writeShellScriptBin "scp-helper" ''
+    ${pkgs.openssh}/bin/scp -i ${inquisiDir}/inquisitor.key -oStrictHostKeyChecking=no "$@"
+  '';
+
+  # Define the inquisitor service user
+  inquisitorUser = {
+    name = "inquisitor";
+    group = "inquisitor";
+    description = "Inquisitor service user";
+    isSystemUser = true;
+    shell = pkgs.bashInteractive;
+    packages = [ inquisitor pkgs.cron ];
+  };
+
+  # Create the inquisitor config file in the nix store, pointing to /var/lib/
+  inquisitorConfig = pkgs.writeTextFile {
+    name = "inquisitor.conf";
+    text = ''
+      DataPath = ${inquisiDir}/data/
+      SourcePath = ${inquisiDir}/sources/
+      CachePath = ${inquisiDir}/cache/
+      Verbose = false
+      LogFile = ${inquisiDir}/inquisitor.log
+    '';
+  };
+
+  # Create a setup script to ensure the service directory state
+  inquisitorSetup = pkgs.writeShellScriptBin "inquisitor-setup.sh" ''
+    # Ensure the service directory and the default source directory
+    ${pkgs.coreutils}/bin/mkdir -p ${inquisiDir}/data/inquisitor/
+    ${pkgs.coreutils}/bin/mkdir -p ${inquisiDir}/sources/
+    ${pkgs.coreutils}/bin/mkdir -p ${inquisiDir}/cache/
+    if [ ! -f ${inquisiDir}/data/inquisitor/state ]; then
+      ${pkgs.coreutils}/bin/echo "{}" > ${inquisiDir}/data/inquisitor/state
+    fi
+
+    # Ensure the service owns the folders
+    chown -R ${inquisitorUser.name} ${inquisiDir}
+
+    # Ensure the scp helper is present
+    if [ -f ${inquisiDir}/scp-helper ]; then
+      rm ${inquisiDir}/scp-helper
+    fi
+    ln -s -t ${inquisiDir} ${scp-helper}/bin/scp-helper
+  '';
+
+  # Create a run script for the server
+  inquisitorRun = pkgs.writeShellScriptBin "inquisitor-run.sh" ''
+    cd ${inquisiDir}
+    ${inquisitor}/bin/gunicorn \
+      --bind=localhost:24133 \
+      --workers=4 \
+      --timeout 120 \
+      --log-level debug \
+      "inquisitor.app:wsgi()"
+  '';
+
+  # Create a wrapper to execute the cli as the service user
+  inquisitorWrapper = pkgs.writeShellScriptBin "inq" ''
+    sudo --user=inquisitor ${inquisitor}/bin/inquisitor "$@"
+  '';
+in
+{
+  users.users.inquisitor = inquisitorUser;
+  users.groups.inquisitor = {};
+
+  # Link the config in /etc to avoid envvar shenanigans
+  environment.etc."inquisitor.conf".source = "${inquisitorConfig}";
+
+  # Give all users the inq wrapper
+  environment.systemPackages = [ inquisitorWrapper ];
+
+  # Allow the sudo in the cli wrapper without password
+  security.sudo.extraRules = [{
+    commands = [{
+      command = "${inquisitor}/bin/inquisitor";
+      options = [ "NOPASSWD" ];
+    }];
+    runAs = "${inquisitorUser.name}";
+    groups = [ "users" ];
+  }];
+
+  # Run the setup script on activation
+  system.activationScripts.inquisitorSetup = "${inquisitorSetup}/bin/inquisitor-setup.sh";
+
+  # Set up the inquisitor service
+  systemd.services.inquisitor =
+  {
+    description = "Inquisitor server";
+    script = "${inquisitorRun}/bin/inquisitor-run.sh";
+    serviceConfig = {
+      User = "${inquisitorUser.name}";
+      Type = "simple";
+    };
+    wantedBy = [ "multi-user.target" ];
+    after = [ "network.target" ];
+    enable = true;
+  };
+
+  # Set up nginx to reverse proxy from the beatific url to the inq server
+  services.nginx.enable = true;
+  services.nginx.virtualHosts.inquisitorHost = {
+    listen = [ { addr = "10.7.3.1"; port = 80; } ];
+    locations."/".extraConfig = ''
+      access_log /var/log/nginx/access.inquisitor.log;
+      proxy_buffering off;
+      proxy_pass http://localhost:24133/;
+    '';
+  };
+
+  # Allow nginx through the firewall
+  networking.firewall = {
+    allowedTCPPorts = [
+      80  # http
+      443 # https
+    ];
+  };
+
+  # Enable cron, but don't set up any system cron jobs
+  # Inquisitor updates will be managed manually
+  services.cron.enable = true;
+}