[eslint] configure no-extraneous-dependencies rule properly, to prevent today’s bugs

Author: ljharb

.eslintrc

@@ -76,7 +76,16 @@
         "eslint-plugin/require-meta-type": "error",
 
         // dog fooding
-        "import/no-extraneous-dependencies": "error",
+        "import/no-extraneous-dependencies": ["error", {
+            "devDependencies": [
+                "tests/**",
+                "resolvers/*/test/**",
+                "scripts/**"
+            ],
+            "optionalDependencies": false,
+            "peerDependencies": true,
+            "bundledDependencies": false,
+        }],
         "import/unambiguous": "off",
     },
 
@@ -106,7 +115,6 @@
         {
             "files": "resolvers/webpack/**",
             "rules": {
-                "import/no-extraneous-dependencies": 1,
                 "no-console": 1,
             },
             "env": {

src/ExportMap.js

@@ -558,7 +558,7 @@ ExportMap.parse = function (path, content, context) {
     try {
       if (tsConfigInfo.tsConfigPath !== undefined) {
         // Projects not using TypeScript won't have `typescript` installed.
-        if (!ts) { ts = require('typescript'); }
+        if (!ts) { ts = require('typescript'); } // eslint-disable-line import/no-extraneous-dependencies
 
         const configFile = ts.readConfigFile(tsConfigInfo.tsConfigPath, ts.sys.readFile);
         return ts.parseJsonConfigFileContent(

src/rules/no-duplicates.js

@@ -4,7 +4,7 @@ import semver from 'semver';
 
 let typescriptPkg;
 try {
-  typescriptPkg = require('typescript/package.json');
+  typescriptPkg = require('typescript/package.json'); // eslint-disable-line import/no-extraneous-dependencies
 } catch (e) { /**/ }
 
 function checkImports(imported, context) {