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findConfigFile can return undefined #20556

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Merged
mhegazy merged 1 commit into from
Jan 5, 2018
Merged

findConfigFile can return undefined #20556

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2 changes: 1 addition & 1 deletion src/compiler/program.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@
namespace ts {
const ignoreDiagnosticCommentRegEx = /(^\s*$)|(^\s*\/\/\/?\s*(@ts-ignore)?)/;

export function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName = "tsconfig.json"): string {
export function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName = "tsconfig.json"): string | undefined {
return forEachAncestorDirectory(searchPath, ancestor => {
const fileName = combinePaths(ancestor, configName);
return fileExists(fileName) ? fileName : undefined;
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2 changes: 1 addition & 1 deletion tests/baselines/reference/api/tsserverlibrary.d.ts
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Expand Up @@ -3775,7 +3775,7 @@ declare namespace ts {
}
}
declare namespace ts {
function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName?: string): string;
function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName?: string): string | undefined;
function resolveTripleslashReference(moduleName: string, containingFile: string): string;
function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
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2 changes: 1 addition & 1 deletion tests/baselines/reference/api/typescript.d.ts
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Expand Up @@ -3722,7 +3722,7 @@ declare namespace ts {
}
}
declare namespace ts {
function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName?: string): string;
function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName?: string): string | undefined;
function resolveTripleslashReference(moduleName: string, containingFile: string): string;
function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
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