49 lines
1.3 KiB
Plaintext
49 lines
1.3 KiB
Plaintext
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import fs from 'fs'
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import path from 'path'
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/**
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* Find the @config at-rule in the given CSS AST and return the relative path to the config file
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*
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* @param {import('postcss').Root} root
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* @param {import('postcss').Result} result
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*/
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export function findAtConfigPath(root, result) {
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let configPath = null
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let relativeTo = null
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root.walkAtRules('config', (rule) => {
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relativeTo = rule.source?.input.file ?? result.opts.from ?? null
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if (relativeTo === null) {
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throw rule.error(
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'The `@config` directive cannot be used without setting `from` in your PostCSS config.'
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)
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}
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if (configPath) {
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throw rule.error('Only one `@config` directive is allowed per file.')
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}
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let matches = rule.params.match(/(['"])(.*?)\1/)
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if (!matches) {
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throw rule.error('A path is required when using the `@config` directive.')
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}
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let inputPath = matches[2]
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if (path.isAbsolute(inputPath)) {
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throw rule.error('The `@config` directive cannot be used with an absolute path.')
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}
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configPath = path.resolve(path.dirname(relativeTo), inputPath)
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if (!fs.existsSync(configPath)) {
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throw rule.error(
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`The config file at "${inputPath}" does not exist. Make sure the path is correct and the file exists.`
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)
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}
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rule.remove()
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})
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return configPath ? configPath : null
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}
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