64 lines
1.4 KiB
JavaScript
64 lines
1.4 KiB
JavaScript
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"use strict";
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const path = require("path");
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const reSyntaxCSS = /^(?:post)?css$/i;
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function cssSyntax () {
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return {
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stringify: require("postcss/lib/stringify"),
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parse: require("postcss/lib/parse"),
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};
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}
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function normalize (syntax) {
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if (!syntax.parse) {
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syntax = {
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parse: syntax,
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};
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}
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return syntax;
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}
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function requireSyntax (syntax) {
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if (reSyntaxCSS.test(syntax)) {
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return cssSyntax();
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} else if (/^sugarss$/i.test(syntax)) {
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syntax = "sugarss";
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} else if (path.isAbsolute(syntax) || syntax[0] === ".") {
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syntax = path.resolve(syntax);
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} else {
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syntax = syntax.toLowerCase().replace(/^(?:postcss-)?(\w+)/i, "postcss-$1");
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}
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return normalize(require(syntax));
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}
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function getSyntax (lang, opts) {
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let syntax;
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lang = lang || "css";
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if (opts.syntax.config[lang]) {
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syntax = opts.syntax.config[lang];
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if (typeof syntax === "string") {
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if (syntax !== lang && opts.syntax.config[syntax]) {
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return getSyntax(syntax, opts);
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}
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syntax = requireSyntax(syntax);
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} else {
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syntax = normalize(syntax);
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}
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} else if (reSyntaxCSS.test(lang)) {
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syntax = cssSyntax();
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} else {
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return requireSyntax(lang);
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}
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if (!syntax.stringify) {
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if (reSyntaxCSS.test(lang)) {
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syntax.stringify = require("postcss/lib/stringify");
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} else {
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syntax.stringify = getSyntax(null, opts).stringify;
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}
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}
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opts.syntax.config[lang] = syntax;
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return syntax;
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}
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module.exports = getSyntax;
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