Oleksii Bulenok
49 lines
1.8 KiB
JavaScript
49 lines
1.8 KiB
JavaScript
/*
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* Worker thread for the "app callsites" test in
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* __tests__/babel-plugin-lexicon-leaf-imports.test.js: typechecks the
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* consumer files with the given overlay contents and reports error
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* diagnostics. The baseline and shadow typechecks are independent CPU-bound
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* programs, so the test runs one worker for each in parallel.
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*
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* Lives outside __tests__/ so Jest does not collect it as a test suite.
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* ts.Diagnostic objects do not survive structured clone, so diagnostics are
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* flattened to plain {code, message, fileName, line} records here.
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*/
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const {parentPort, workerData} = require('node:worker_threads')
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const ts = require('typescript')
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const {consumers, overlays, options} = workerData
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const host = ts.createCompilerHost(options)
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const origGetSourceFile = host.getSourceFile.bind(host)
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const origFileExists = host.fileExists.bind(host)
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const origReadFile = host.readFile.bind(host)
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host.fileExists = f => overlays.has(f) || origFileExists(f)
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host.readFile = f => overlays.get(f) ?? origReadFile(f)
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host.getSourceFile = (f, lang, ...rest) =>
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overlays.has(f)
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? ts.createSourceFile(f, overlays.get(f), lang)
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: origGetSourceFile(f, lang, ...rest)
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const program = ts.createProgram(consumers, options, host)
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const byFile = {}
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for (const file of consumers) {
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const sf = program.getSourceFile(file)
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if (!sf) throw new Error(`${file} missing from program`)
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byFile[file] = [
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...program.getSyntacticDiagnostics(sf),
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...program.getSemanticDiagnostics(sf),
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]
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.filter(d => d.category === ts.DiagnosticCategory.Error)
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.map(d => ({
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code: d.code,
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message: ts.flattenDiagnosticMessageText(d.messageText, ' '),
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fileName: d.file?.fileName,
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line:
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d.file && d.start !== undefined
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? d.file.getLineAndCharacterOfPosition(d.start).line + 1
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: undefined,
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}))
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}
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parentPort.postMessage(byFile)
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