feat: support eslint 8 by excluding coffee if the version is >=8

Author: aminya

package.json

@@ -39,9 +39,12 @@
     "eslint-plugin-yaml": "^0.5.0",
     "prettier": "2.4.1",
     "read-pkg-up": "^7",
+    "semver": "^7.3.7",
     "typescript": "^4"
   },
   "devDependencies": {
+    "@types/node": "^17.0.41",
+    "@types/semver": "^7.3.9",
     "eslint": "^7",
     "execa": "^5.1.1",
     "gitly": "^2.1.6",

pnpm-lock.yaml

@@ -0,0 +1,15 @@
+const child_process = require("child_process")
+
+function getEslintVersion() {
+  if (process.argv[1].includes("eslint.js")) {
+    const eslintVersion = child_process.execFileSync(process.argv[0], [process.argv[1], "--version"], {
+      encoding: "utf8",
+      stdio: "pipe",
+    })
+    return eslintVersion
+  } else {
+    return require("eslint/package.json").version
+  }
+}
+
+exports.getEslintVersion = getEslintVersion

src/eslint-version.js

@@ -6,15 +6,21 @@ const { csonConfig } = require("./cson")
 const { yamlConfig } = require("./yaml")
 const { htmlConfig } = require("./html")
 const { pluginImportSettings } = require("./plugin-import-rules")
+const semverLt = require("semver/functions/lt")
+const { getEslintVersion } = require("./eslint-version")
 
 const overrides = [tsConfig, jsonConfig, yamlConfig, htmlConfig]
 
 // add coffee if installed
 if (coffeeConfig !== {}) {
   try {
-    const found = require.resolve("eslint-plugin-coffee")
-    if (found) {
-      overrides.push(coffeeConfig, csonConfig)
+    // check if the eslint version is >= 8
+    if (semverLt(getEslintVersion(), "8.0.0")) {
+      // if so try adding the coffee plugin
+      const found = require.resolve("eslint-plugin-coffee")
+      if (found) {
+        overrides.push(coffeeConfig, csonConfig)
+      }
     }
   } catch (_err) {
     // optional plugin