Hermes-agent

nix/devShell.nix

@@ -0,0 +1,41 @@
+# nix/devShell.nix — Dev shell that delegates setup to each package
+#
+# Each npm workspace package exposes passthru.packageJsonPath (e.g.
+# "ui-tui/package.json").  This file collects them all and passes the
+# list to mkNpmDevShellHook, which stamps all package.jsons at once,
+# then runs a single `npm i --package-lock-only` if any changed and
+# `npm ci` if the lockfile changed.
+{ ... }:
+{
+  perSystem =
+    { pkgs, self', ... }:
+    let
+      packages = builtins.attrValues self'.packages;
+      hermesNpmLib = self'.packages.default.passthru.hermesNpmLib;
+      fixLockfilesExe = pkgs.lib.getExe self'.packages.fix-lockfiles;
+
+      # Collect all packageJsonPath values from npm workspace packages.
+      npmPackageJsonPaths = builtins.filter (p: p != null) (
+        map (p: p.passthru.packageJsonPath or null) packages
+      );
+
+      # Non-npm packages may have their own devShellHook (e.g. hermes-agent
+      # stamps pyproject.toml + uv.lock for Python venv setup).
+      nonNpmHooks = map (p: p.passthru.devShellHook or "") packages;
+      combinedNonNpm = pkgs.lib.concatStringsSep "\n" (builtins.filter (h: h != "") nonNpmHooks);
+    in
+    {
+      devShells.default = pkgs.mkShell {
+        inputsFrom = packages;
+        packages = with pkgs; [
+          uv
+        ];
+        shellHook = ''
+          echo "Hermes Agent dev shell"
+          ${combinedNonNpm}
+          ${hermesNpmLib.mkNpmDevShellHook npmPackageJsonPaths fixLockfilesExe}
+          echo "Ready. Run 'hermes' to start."
+        '';
+      };
+    };
+}