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Add a new compiler option moduleSuffixes to expand the node module resolver's search algorithm (#48189)

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* Add moduleSuffixes compiler option and related tests. Update baselines for compiler options tests.

* Add a flag to the command-line parser which allows "list" params to preserve "falsy" values such as empty strings. Falsy values are normally stripped out.

* Add tests. Rework resolver logic to only run module-suffix code when needed.

* PR feedback

* Add test

* Remove unnecessary conditional.
This commit is contained in:
Adam Foxman
2022-03-30 15:23:26 -07:00
committed by GitHub
parent c639d3afb9
commit 41aca7c337
105 changed files with 1728 additions and 2 deletions
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src/compiler/moduleNameResolver.ts
+10
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@@ -1576,6 +1576,16 @@ namespace ts {
/** Return the file if it exists. */
function tryFile(fileName: string, onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
if (!state.compilerOptions.moduleSuffixes?.length) {
return tryFileLookup(fileName, onlyRecordFailures, state);
}
const ext = tryGetExtensionFromPath(fileName) ?? "";
const fileNameNoExtension = ext ? removeExtension(fileName, ext) : fileName;
return forEach(state.compilerOptions.moduleSuffixes, suffix => tryFileLookup(fileNameNoExtension + suffix + ext, onlyRecordFailures, state));
}
function tryFileLookup(fileName: string, onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
if (!onlyRecordFailures) {
if (state.host.fileExists(fileName)) {
if (state.traceEnabled) {