Correctly set filesByName map when reusing program to ensure it is same as old program #35784
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…me as old It was previously not populated correctly if preserveSymlinks with useSourceOfProjectReference was true, in that case if module was resolved to symlink and we deduced it refers to source of project reference we want to set "resolvedFileName" correctly otherwise it results in incorrect module not found errors.
sheetalkamat
requested review from
RyanCavanaugh,
amcasey,
andrewbranch,
elibarzilay,
gabritto,
orta,
rbuckton,
sandersn and
weswigham
andrewbranch
approved these changes
Dec 20, 2019
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Previously we were setting these with each new sourceFile's
pathandresolvedPathbut that's not enough.Eg. if its monorepo like setup and we are using sourceOfProjectReferenceRedirect with preserveSymlinks, we would get resolvedFileName of the moduleResolution as
node_modules/projectName/someFile.d.tsand when creating new program without reusing old program, we would find that this is actually link to saysrc/someFile.tsin referenced project and use that source file. So in that program we have entries forprojectName/src/someFile.ts,projectName/lib/someFile.d.tsas well asnode_modules/projectName/someFile.d.tsall pointing tosomeFile.tssourceFile.In new program that uses old program previously we would only set
projectName/src/someFile.ts,projectName/lib/someFile.d.tsto point to the sourceFile ofsomeFile.tsand hence in checker we would incorrectly think that module resolution has failed and report the error.Fixes #35768