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Commit 646fa4e3ee fixed #10547 by
restricting optimisticLookupPackageJson to package.json files with a
"name" property, which effectively skipped over intermediate package.json
files with additional properties.
However, in Node.js 12.16.0 (Meteor 1.9.1+), modules evaluated natively by
Node are considered ECMAScript modules if the closest package.json file
has "type": "module" (or has an .mjs file extension). This poses a problem
for the module.useNode() trick (see packages/modules-runtime/server.js),
because ESM modules cannot be imported using require.
For example, recent versions of the @babel/runtime package have a
@babel/runtime/helpers/esm/package.json file for the ESM versions of its
helpers (which specifies "type": "module"), but that package.json file
does not have a "name" property, because it is not the root package.json
file representing the entire @babel/runtime package.
I considered making the "name" restriction configurable, but that would
have fragmented the caching of optimisticLookupPackageJson. Instead, I
made it return an array of all potentially relevant package.json objects,
which can be safely cached.
This means that the caller has to iterate over the array, but there is
only one call site for this function (in tools/isobuild/package-source.js)
right now, so that wasn't too much work.
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