fix(lint): notify about version differences for eslint-plugin-esl

Co-authored-by: ala'n (Alexey Stsefanovich) <astsefanovich@exadel.com>

eslint/package.json

@@ -15,7 +15,9 @@
     "clean": "rimraf dist",
     "build": "npm run clean && tsc --project tsconfig.build.json"
   },
-  "dependencies": {},
+  "dependencies": {
+    "semver": "^7.6.2"
+  },
   "files": [
     "dist/**/*"
   ],

eslint/src/core/check-version.ts

@@ -0,0 +1,25 @@
+import {lt} from 'semver';
+import color from 'kleur';
+
+const ESL_PACKAGE = '@exadel/esl';
+const PLUGIN_PACKAGE = '@exadel/eslint-plugin-esl';
+
+function getInstalledVersion(packageName: string): string | null {
+  try {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports, @typescript-eslint/no-var-requires
+    return require(`${packageName}/package.json`).version;
+  } catch (error) {
+    return null;
+  }
+}
+
+export function checkVersion(): void {
+  const eslintVersion = getInstalledVersion(PLUGIN_PACKAGE);
+  const eslVersion = getInstalledVersion(ESL_PACKAGE);
+  if  (!(eslintVersion && eslVersion && lt(eslintVersion, eslVersion))) return;
+
+  console.log(`\n${color.yellow('⚠️ Warning:')}
+  Your installed version of ${color.yellow(PLUGIN_PACKAGE)} (${color.red(eslintVersion)}) \
+is lower than version of main package ${color.yellow(ESL_PACKAGE)} (${color.green(eslVersion)}).
+  Please update ${color.yellow(PLUGIN_PACKAGE)} to the latest version ${color.green(eslVersion)}\n`);
+}

eslint/src/index.ts

@@ -1,10 +1,13 @@
 import DEPRECATED_4_RULES from './rules/4/all.rules';
 import DEPRECATED_5_RULES from './rules/5/all.rules';
+import {checkVersion} from './core/check-version';
 
 import type {Rule} from 'eslint';
 
 export type logLevel = 'warn' | 'error';
 
+checkVersion();
+
 const buildDefault = (definition: Record<string, Rule.RuleModule>, level: logLevel): Record<string, logLevel> => {
   const config: Record<string, logLevel> = {};
   for (const name of Object.keys(definition)) {