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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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16
src/compiler/commandLineParser.ts
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@@ -884,6 +884,18 @@ namespace ts {
description: Diagnostics.Allow_accessing_UMD_globals_from_modules,
defaultValueDescription: false,
},
{
name: "moduleSuffixes",
type: "list",
element: {
name: "suffix",
type: "string",
},
listPreserveFalsyValues: true,
affectsModuleResolution: true,
category: Diagnostics.Modules,
description: Diagnostics.List_of_file_name_suffixes_to_search_when_resolving_a_module,
},
// Source Maps
{
@@ -3192,7 +3204,7 @@ namespace ts {
if (option.type === "list") {
const listOption = option;
if (listOption.element.isFilePath || !isString(listOption.element.type)) {
return filter(map(value, v => normalizeOptionValue(listOption.element, basePath, v)), v => !!v) as CompilerOptionsValue;
return filter(map(value, v => normalizeOptionValue(listOption.element, basePath, v)), v => listOption.listPreserveFalsyValues ? true : !!v) as CompilerOptionsValue;
}
return value;
}
@@ -3233,7 +3245,7 @@ namespace ts {
}
function convertJsonOptionOfListType(option: CommandLineOptionOfListType, values: readonly any[], basePath: string, errors: Push<Diagnostic>): any[] {
return filter(map(values, v => convertJsonOption(option.element, v, basePath, errors)), v => !!v);
return filter(map(values, v => convertJsonOption(option.element, v, basePath, errors)), v => option.listPreserveFalsyValues ? true : !!v);
}
/**