51 lines
1.5 KiB
JavaScript
51 lines
1.5 KiB
JavaScript
let globalPnpApi;
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try {
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globalPnpApi = require(`pnpapi`);
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} catch {
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// Just ignore if we don't have a global PnP instance - perhaps
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// we'll eventually find one at runtime due to multi-tree
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}
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const createRequire = require(`./createRequire`);
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const getDefaultResolver = require(`./getDefaultResolver`);
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module.exports = (request, options) => {
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const {
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basedir,
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defaultResolver = getDefaultResolver(),
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extensions,
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} = options;
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if (process.versions.pnp) {
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let pnpApi = globalPnpApi;
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// While technically it would be more correct to run this code
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// everytime (since they file being run *may* belong to a
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// different dependency tree than the one owning Jest), in
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// practice this doesn't happen anywhere else than on the Jest
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// repository itself (in the test env). So in order to preserve
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// the performances, we can afford a slight incoherence here.
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if (!pnpApi) {
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try {
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const baseReq = createRequire(`${basedir}/internal.js`);
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pnpApi = baseReq(`pnpapi`);
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} catch {
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// The file isn't part of a PnP dependency tree, so we can
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// just use the default Jest resolver.
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}
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}
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if (pnpApi) {
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const resolution = pnpApi.resolveRequest(request, `${basedir}/`, {extensions});
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// When the request is a native module, Jest expects to get the string back unmodified, but pnp returns null instead.
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if (resolution === null)
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return request;
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return resolution;
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}
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}
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return defaultResolver(request, {...options, allowPnp: false});
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};
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