49 lines
1.2 KiB
JavaScript
49 lines
1.2 KiB
JavaScript
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/**
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* @typedef {import('vfile').VFileCompatible} VFileCompatible
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* @typedef {import('../core.js').ProcessorOptions} ProcessorOptions
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* @typedef {import('../compile.js').CompileOptions} CompileOptions
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*/
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import {VFile} from 'vfile'
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import {md} from './extnames.js'
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/**
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* Create a file and options from a given `vfileCompatible` and options that
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* might contain `format: 'detect'`.
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*
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* @param {VFileCompatible} vfileCompatible
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* @param {CompileOptions | null | undefined} [options]
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* @returns {{file: VFile, options: ProcessorOptions}}
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*/
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export function resolveFileAndOptions(vfileCompatible, options) {
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const file = looksLikeAVFile(vfileCompatible)
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? vfileCompatible
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: new VFile(vfileCompatible)
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const {format, ...rest} = options || {}
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return {
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file,
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options: {
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format:
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format === 'md' || format === 'mdx'
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? format
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: file.extname && (rest.mdExtensions || md).includes(file.extname)
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? 'md'
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: 'mdx',
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...rest
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}
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}
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}
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/**
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* @param {VFileCompatible | null | undefined} [value]
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* @returns {value is VFile}
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*/
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function looksLikeAVFile(value) {
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return Boolean(
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value &&
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typeof value === 'object' &&
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'message' in value &&
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'messages' in value
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)
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}
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