up n_m

node_modules/@mdx-js/mdx/lib/util/resolve-file-and-options.js

@@ -0,0 +1,53 @@
+/**
+ * @typedef {import('vfile').Compatible} Compatible
+ * @typedef {import('../compile.js').CompileOptions} CompileOptions
+ * @typedef {import('../core.js').ProcessorOptions} ProcessorOptions
+ */
+
+import {VFile} from 'vfile'
+import {md} from './extnames.js'
+
+/**
+ * Create a file and options from a given `vfileCompatible` and options that
+ * might contain `format: 'detect'`.
+ *
+ * @param {Readonly<Compatible>} vfileCompatible
+ *   File.
+ * @param {Readonly<CompileOptions> | null | undefined} [options]
+ *   Configuration (optional).
+ * @returns {{file: VFile, options: ProcessorOptions}}
+ *   File and options.
+ */
+export function resolveFileAndOptions(vfileCompatible, options) {
+  const file = looksLikeAVFile(vfileCompatible)
+    ? vfileCompatible
+    : new VFile(vfileCompatible)
+  const {format, ...rest} = options || {}
+  return {
+    file,
+    options: {
+      format:
+        format === 'md' || format === 'mdx'
+          ? format
+          : file.extname && (rest.mdExtensions || md).includes(file.extname)
+            ? 'md'
+            : 'mdx',
+      ...rest
+    }
+  }
+}
+
+/**
+ * @param {Readonly<Compatible> | null | undefined} [value]
+ *   Thing.
+ * @returns {value is VFile}
+ *   Check.
+ */
+function looksLikeAVFile(value) {
+  return Boolean(
+    value &&
+      typeof value === 'object' &&
+      'message' in value &&
+      'messages' in value
+  )
+}