@velcro/plugin-sucrase/dist/dist-module/index.js

A sucrase plugin for Velcro that adds support for Typescript, jsx, ES Modules and more

import { transform } from 'sucrase';

function sucrasePlugin(options = {}) {
    const extensions = ['js'];
    if (options.transforms) {
        for (const transform of options.transforms) {
            switch (transform) {
                case 'jsx':
                    extensions.push('jsx');
                    break;
                case 'typescript':
                    extensions.push('ts', 'tsx');
                    break;
            }
        }
    }
    const uriTestRx = new RegExp(`\.(?:${extensions.join('|')})$`, 'i');
    const jsxPragmaRx = /\/\*\*\s*@jsx\s+(\S+)\s*\*+\//;
    const jsxFragmentPragmaRx = /\/\*\*\s*@jsxFragment\s+(\S+)\s*\*+\//;
    return {
        name: 'sucrasePlugin',
        transform(ctx, uri, code) {
            if (!uriTestRx.test(uri.path)) {
                return;
            }
            const sucraseOptions = {
                transforms: ['imports', ...(options.transforms || [])],
                filePath: uri.toString(),
                production: ctx.nodeEnv === 'production',
                sourceMapOptions: {
                    compiledFilename: uri.toString(),
                },
            };
            if (!options.jsxPragma) {
                // If not specified try to detect the pragma
                const jsxPragmaMatches = code.match(jsxPragmaRx);
                if (jsxPragmaMatches) {
                    sucraseOptions.jsxPragma = jsxPragmaMatches[1];
                }
            }
            if (!options.jsxFragmentPragma) {
                // If not specified try to detect the pragma
                const jsxFragmentPragmaMatches = code.match(jsxFragmentPragmaRx);
                if (jsxFragmentPragmaMatches) {
                    sucraseOptions.jsxFragmentPragma = jsxFragmentPragmaMatches[1];
                }
            }
            const result = transform(code, sucraseOptions);
            return {
                code: result.code,
                sourceMap: result.sourceMap,
            };
        },
    };
}

const version = '0.56.2';

export { sucrasePlugin, version };
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