steamUpdater: init

pkgs/common-updater/steam-updater.nix

@@ -0,0 +1,79 @@
+{
+  lib,
+  stdenv,
+  common-updater-scripts,
+  coreutils,
+  depotdownloader,
+  gnugrep,
+  gnused,
+  steamctl,
+  jq,
+  nix,
+  writeScript,
+}:
+
+{
+  name ? null,
+  pname ? null,
+  version ? null,
+  attrPath ? null,
+  # Explicit Steam appId required for the update script to work.
+  appId ? null,
+}:
+
+let
+  # shell script to update package
+  updateScript = writeScript "generic-update-script.sh" ''
+    #! ${stdenv.shell}
+
+    # Set strict shell mode and enable debugging
+    set -o errexit
+    set -x
+
+    # Add utilities to PATH
+    export PATH=${
+      lib.makeBinPath [
+        "${common-updater-scripts}/bin"
+        "${depotdownloader}/bin"
+        "${gnugrep}/bin"
+        "${gnused}/bin"
+        "${jq}/bin"
+        "${steamctl}/bin"
+      ]
+    }:$PATH
+
+    # Get necessary variables
+    name="$1"
+    pname="$2"
+    version="$3"
+    attr_path="$4"
+    app_id="$5"
+
+    [[ -n "$name" ]] || name="$UPDATE_NIX_NAME"
+    [[ -n "$pname" ]] || pname="$UPDATE_NIX_PNAME"
+    [[ -n "$version" ]] || version="$UPDATE_NIX_OLD_VERSION"
+    [[ -n "$attr_path" ]] || attr_path="$UPDATE_NIX_ATTR_PATH"
+
+    # Use steamctl to get information about latest depots
+    APP_INFO=$(steamctl -l quiet --anonymous depot info --app $app_id)
+    LATEST_VERSION=$(echo $APP_INFO | grep -oP 'Created On: \K[0-9\-]+' | sort -r | head -n 1)
+    DEPOT_IDS=$(echo $APP_INFO | grep -oP 'Depot ID: \K[0-9]+')
+    MANIFEST_GIDS=$(echo $APP_INFO | grep -oP 'Manifest GID: \K[0-9]+')
+  '';
+
+in
+{
+  name = "steam-update-script";
+  command = [
+    updateScript
+    name
+    pname
+    version
+    attrPath
+    appId
+  ];
+  supportedFeatures = [
+    # Stdout must contain output according to the updateScript commit protocol when the update script finishes with a non-zero exit code.
+    "commit"
+  ];
+}