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transform.js
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transform.js
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const svelte = require('svelte/compiler');
const { execSync } = require('child_process');
const { join } = require('path');
module.exports = {
process: (source, filePath, config, s) => {
const preprocess = join(__dirname, './preprocess.js');
process.env.jest = true;
let processed = source;
if (
config.globals &&
config.globals.svelte &&
config.globals.svelte.preprocess
) {
process.env.sveltest = source;
processed = execSync(`node ${preprocess}`).toString();
}
let compilerOptions = {};
if (
config.globals &&
config.globals.svelte &&
config.globals.svelte.compilerOptions
) {
compilerOptions = config.globals.svelte.compilerOptions;
}
const compiled = svelte.compile(processed, {
...compilerOptions,
format: 'cjs',
});
return compiled.js.code;
},
};