isPluginCompatible for flipper-server-core

Summary:
Yet another implementation of this function.

References:
https://www.internalfb.com/code/fbsource/[85c1fe5afee7]/xplat/sonar/desktop/flipper-frontend-core/src/utils/isPluginCompatible.tsx?lines=14
https://www.internalfb.com/code/fbsource/[85c1fe5afee7]/xplat/sonar/desktop/flipper-ui-core/src/utils/isPluginCompatible.tsx?lines=15

This one:
- Uses GK from the existing server config
- Gets version from the existing server config

It differs in:
- appVersion not passed in as argument
- Doesn't use RenderHost to obtain the server config

I think, this is acceptable as the function body is effectively the conditional, that depends on the caller available dependencies.

Reviewed By: passy

Differential Revision: D37749761

fbshipit-source-id: 3094e87c7770ac66e5764c932a0a0d4e7f5b63f5

desktop/flipper-server-core/package.json

@@ -37,6 +37,7 @@
     "rsocket-flowable": "^0.0.27",
     "rsocket-tcp-server": "^0.0.25",
     "rsocket-types": "^0.0.25",
+    "semver": "^7.3.7",
     "serialize-error": "^8.1.0",
     "split2": "^4.1.0",
     "tmp": "^0.2.1",

desktop/flipper-server-core/src/plugins/isPluginCompatible.tsx

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {PluginDetails} from 'flipper-common';
+import semver from 'semver';
+import {getFlipperServerConfig} from '../FlipperServerConfig';
+
+export function isPluginCompatible(plugin: PluginDetails) {
+  const config = getFlipperServerConfig();
+  const flipperVersion = config.environmentInfo.appVersion;
+  return (
+    config.gatekeepers['flipper_disable_plugin_compatibility_checks'] ||
+    flipperVersion === '0.0.0' ||
+    !plugin.engines?.flipper ||
+    semver.lte(plugin.engines?.flipper, flipperVersion)
+  );
+}
+
+export default isPluginCompatible;