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There is no need to check for file presence when trying to rename imports based on file rename #29313

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Merged
Sheetal Nandi (sheetalkamat) merged 1 commit into from
Jan 9, 2019
Merged

There is no need to check for file presence when trying to rename imports based on file rename #29313

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31 changes: 19 additions & 12 deletions src/services/getEditsForFileRename.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -151,7 +151,7 @@ namespace ts {
const toImport = oldFromNew !== undefined
// If we're at the new location (file was already renamed), need to redo module resolution starting from the old location.
// TODO:GH#18217
? getSourceFileToImportFromResolved(resolveModuleName(importLiteral.text, oldImportFromPath, program.getCompilerOptions(), host as ModuleResolutionHost), oldToNew, host)
? getSourceFileToImportFromResolved(resolveModuleName(importLiteral.text, oldImportFromPath, program.getCompilerOptions(), host as ModuleResolutionHost), oldToNew)
: getSourceFileToImport(importedModuleSymbol, importLiteral, sourceFile, program, host, oldToNew);

// Need an update if the imported file moved, or the importing file moved and was using a relative path.
Expand Down Expand Up @@ -192,28 +192,35 @@ namespace ts {
const resolved = host.resolveModuleNames
? host.getResolvedModuleWithFailedLookupLocationsFromCache && host.getResolvedModuleWithFailedLookupLocationsFromCache(importLiteral.text, importingSourceFile.fileName)
: program.getResolvedModuleWithFailedLookupLocationsFromCache(importLiteral.text, importingSourceFile.fileName);
return getSourceFileToImportFromResolved(resolved, oldToNew, host);
return getSourceFileToImportFromResolved(resolved, oldToNew);
}
}

function getSourceFileToImportFromResolved(resolved: ResolvedModuleWithFailedLookupLocations | undefined, oldToNew: PathUpdater, host: LanguageServiceHost): ToImport | undefined {
function getSourceFileToImportFromResolved(resolved: ResolvedModuleWithFailedLookupLocations | undefined, oldToNew: PathUpdater): ToImport | undefined {
// Search through all locations looking for a moved file, and only then test already existing files.
// This is because if `a.ts` is compiled to `a.js` and `a.ts` is moved, we don't want to resolve anything to `a.js`, but to `a.ts`'s new location.
return tryEach(tryGetNewFile) || tryEach(tryGetOldFile);
if (!resolved) return undefined;

function tryEach(cb: (oldFileName: string) => ToImport | undefined): ToImport | undefined {
return resolved && (
(resolved.resolvedModule && cb(resolved.resolvedModule.resolvedFileName)) || firstDefined(resolved.failedLookupLocations, cb));
// First try resolved module
if (resolved.resolvedModule) {
const result = tryChange(resolved.resolvedModule.resolvedFileName);
if (result) return result;
}

function tryGetNewFile(oldFileName: string): ToImport | undefined {
const newFileName = oldToNew(oldFileName);
return newFileName !== undefined && host.fileExists!(newFileName) ? { newFileName, updated: true } : undefined; // TODO: GH#18217
// Then failed lookups except package.json since we dont want to touch them (only included ts/js files)
const result = forEach(resolved.failedLookupLocations, tryChangeWithIgnoringPackageJson);
if (result) return result;

// If nothing changed, then result is resolved module file thats not updated
return resolved.resolvedModule && { newFileName: resolved.resolvedModule.resolvedFileName, updated: false };

function tryChangeWithIgnoringPackageJson(oldFileName: string) {
return !endsWith(oldFileName, "/package.json") ? tryChange(oldFileName) : undefined;
}

function tryGetOldFile(oldFileName: string): ToImport | undefined {
function tryChange(oldFileName: string) {
const newFileName = oldToNew(oldFileName);
return host.fileExists!(oldFileName) ? newFileName !== undefined ? { newFileName, updated: true } : { newFileName: oldFileName, updated: false } : undefined; // TODO: GH#18217
return newFileName && { newFileName, updated: true };
}
}

Expand Down