fix: allow incorrect file path in extraneous deps check (#101)

Author: SukkaW

.changeset/bright-taxis-smell.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-import-x": minor
+---
+
+Allow incorrect file path in extraneous deps check

src/rules/no-extraneous-dependencies.ts

@@ -55,8 +55,11 @@ function extractDepFields(pkg: PackageJson) {
 
 function getPackageDepFields(packageJsonPath: string, throwAtRead: boolean) {
   if (!depFieldCache.has(packageJsonPath)) {
-    const depFields = extractDepFields(readJSON(packageJsonPath, throwAtRead)!)
-    depFieldCache.set(packageJsonPath, depFields)
+    const packageJson = readJSON<PackageJson>(packageJsonPath, throwAtRead)
+    if (packageJson) {
+      const depFields = extractDepFields(packageJson)
+      depFieldCache.set(packageJsonPath, depFields)
+    }
   }
   return depFieldCache.get(packageJsonPath)
 }
@@ -83,10 +86,15 @@ function getDependencies(context: RuleContext, packageDir?: string | string[]) {
       // use rule config to find package.json
       for (const dir of paths) {
         const packageJsonPath = path.resolve(dir, 'package.json')
-        const packageContent_ = getPackageDepFields(packageJsonPath, true)!
-        for (const depsKey of Object.keys(packageContent)) {
-          const key = depsKey as keyof PackageDeps
-          Object.assign(packageContent[key], packageContent_[key])
+        const packageContent_ = getPackageDepFields(
+          packageJsonPath,
+          paths.length === 1,
+        )
+        if (packageContent_) {
+          for (const depsKey of Object.keys(packageContent)) {
+            const key = depsKey as keyof PackageDeps
+            Object.assign(packageContent[key], packageContent_[key])
+          }
         }
       }
     } else {

test/rules/no-extraneous-dependencies.spec.ts

@@ -48,6 +48,7 @@ const packageDirBundledDepsAsObject = testFilePath(
 const packageDirBundledDepsRaceCondition = testFilePath(
   'bundled-dependencies/race-condition',
 )
+const emptyPackageDir = testFilePath('empty-folder')
 
 ruleTester.run('no-extraneous-dependencies', rule, {
   valid: [
@@ -130,6 +131,14 @@ ruleTester.run('no-extraneous-dependencies', rule, {
       code: 'import leftpad from "left-pad";',
       options: [{ packageDir: packageDirMonoRepoRoot }],
     }),
+    test({
+      code: 'import leftpad from "left-pad";',
+      options: [{ packageDir: [emptyPackageDir, packageDirMonoRepoRoot] }],
+    }),
+    test({
+      code: 'import leftpad from "left-pad";',
+      options: [{ packageDir: [packageDirMonoRepoRoot, emptyPackageDir] }],
+    }),
     test({
       code: 'import react from "react";',
       options: [