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import { RetrieveGlobals } from "node-retrieve-globals";
// `javascript` Front Matter Type
export default function (frontMatterCode, context = {}) {
let { filePath } = context;
// context.language would be nice as a guard, but was unreliable
if (frontMatterCode.trimStart().startsWith("{")) {
return context.engines.jsLegacy.parse(frontMatterCode, context);
}
let vm = new RetrieveGlobals(frontMatterCode, {
filePath,
// ignored if vm.Module is stable (or --experimental-vm-modules)
transformEsmImports: true,
});
// Future warning until vm.Module is stable:
// If the frontMatterCode uses `import` this uses the `experimentalModuleApi`
// option in node-retrieve-globals to workaround https://github.com/zachleat/node-retrieve-globals/issues/2
let data = {
page: {
// Theoretically fileSlug and filePathStem could be added here but require extensionMap
inputPath: filePath,
},
};
// this is async, but it’s handled in Eleventy upstream.
return vm.getGlobalContext(data, {
reuseGlobal: true,
dynamicImport: true,
// addRequire: true,
});
}
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