Fix case in flat config when a file doesn't have any rules configured

silvenon · silvenon · commit 0b826290b6a1 · 2025-05-08T00:40:14.000+02:00
In flat config the resolved config is "undefined" for files that don't
have any configuration, which caused an error in the CLI utility, unlike
in legacy ESLint configuration where the empty resolved configuration is
an empty object with an empty "rules: {}".
diff --git a/bin/cli.js b/bin/cli.js
@@ -60,7 +60,7 @@ if (module === require.main) {
     })
   )
     .then((configs) => {
-      const rules = configs.flatMap(({ rules }, index) =>
+      const rules = configs.flatMap(({ rules = {} } = {}, index) =>
         Object.entries(rules).map((entry) => [...entry, args[index]])
       );
       const result = processRules(rules);

Original file line number	Diff line number	Diff line change
`@@ -60,7 +60,7 @@ if (module === require.main) {`
`60`	`60`	`})`
`61`	`61`	`)`
`62`	`62`	`.then((configs) => {`
`63`		`- const rules = configs.flatMap(({ rules }, index) =>`
	`63`	`+ const rules = configs.flatMap(({ rules = {} } = {}, index) =>`
`64`	`64`	`Object.entries(rules).map((entry) => [...entry, args[index]])`
`65`	`65`	`);`
`66`	`66`	`const result = processRules(rules);`