refactor: simplify postprocess and verify types

packages/eslint-plugin-mdx/src/processors/index.ts

@@ -1,9 +1,10 @@
 import { markdown } from './markdown'
 import { remark } from './remark'
 
+export * from './options'
+export * from './types'
+
 export const processors = {
   markdown,
   remark,
 }
-
-export * from './options'

packages/eslint-plugin-mdx/src/processors/options.ts

@@ -18,6 +18,10 @@ if (!linterPath) {
   throw new Error('Could not find ESLint Linter in require cache')
 }
 
+export interface LinterConfig extends Linter.Config {
+  extractConfig?(filename: string): Linter.Config
+}
+
 // eslint-disable-next-line @typescript-eslint/consistent-type-imports, @typescript-eslint/no-require-imports, @typescript-eslint/no-var-requires
 const ESLinter = (require(linterPath) as typeof import('eslint')).Linter
 
@@ -27,13 +31,9 @@ const { verify } = ESLinter.prototype
 
 ESLinter.prototype.verify = function (
   code: SourceCode | string,
-  _config: Linter.Config,
+  config: LinterConfig,
   options: string | Linter.LintOptions,
 ) {
-  const config = _config as Linter.Config & {
-    extractConfig?(filename: string): Linter.Config
-  }
-
   // fetch settings
   const settings =
     (config &&

packages/eslint-plugin-mdx/src/processors/remark.ts

@@ -16,35 +16,27 @@ export const remark: ESLintProcessor = {
     return [...markdown.preprocess(text, filename), text]
   },
   postprocess(lintMessages, filename) {
-    lintMessages = [markdown.postprocess(lintMessages, filename)]
-
-    const messages: Linter.LintMessage[] = []
-    for (const lintMessageList of lintMessages) {
-      messages.push(
-        ...lintMessageList.map(lintMessage => {
-          const {
-            message,
-            ruleId: eslintRuleId,
-            severity: eslintSeverity,
-          } = lintMessage
-
-          if (eslintRuleId !== 'mdx/remark') {
-            return lintMessage
-          }
-
-          const { source, ruleId, reason, severity } = JSON.parse(
-            message,
-          ) as RemarkLintMessage
-
-          return {
-            ...lintMessage,
-            ruleId: `${source}-${ruleId}`,
-            message: reason,
-            severity: Math.max(eslintSeverity, severity) as Linter.Severity,
-          }
-        }),
-      )
-    }
-    return messages
+    return markdown.postprocess(lintMessages, filename).map(lintMessage => {
+      const {
+        message,
+        ruleId: eslintRuleId,
+        severity: eslintSeverity,
+      } = lintMessage
+
+      if (eslintRuleId !== 'mdx/remark') {
+        return lintMessage
+      }
+
+      const { source, ruleId, reason, severity } = JSON.parse(
+        message,
+      ) as RemarkLintMessage
+
+      return {
+        ...lintMessage,
+        ruleId: `${source}-${ruleId}`,
+        message: reason,
+        severity: Math.max(eslintSeverity, severity) as Linter.Severity,
+      }
+    })
   },
 }