Dont create program for composite projects to find default project

Author: sheetalkamat

src/compiler/commandLineParser.ts

@@ -3242,13 +3242,25 @@ function shouldReportNoInputFiles(fileNames: string[], canJsonReportNoInutFiles:
     return fileNames.length === 0 && canJsonReportNoInutFiles && (!resolutionStack || resolutionStack.length === 0);
 }
 
+/** @internal */
+export function isSolutionConfig(config: ParsedCommandLine) {
+    return !config.fileNames.length &&
+        hasProperty(config.raw, "references");
+}
+
 /** @internal */
 export function canJsonReportNoInputFiles(raw: any) {
     return !hasProperty(raw, "files") && !hasProperty(raw, "references");
 }
 
 /** @internal */
-export function updateErrorForNoInputFiles(fileNames: string[], configFileName: string, configFileSpecs: ConfigFileSpecs, configParseDiagnostics: Diagnostic[], canJsonReportNoInutFiles: boolean) {
+export function updateErrorForNoInputFiles(
+    fileNames: string[],
+    configFileName: string,
+    configFileSpecs: ConfigFileSpecs,
+    configParseDiagnostics: Diagnostic[],
+    canJsonReportNoInutFiles: boolean,
+) {
     const existingErrors = configParseDiagnostics.length;
     if (shouldReportNoInputFiles(fileNames, canJsonReportNoInutFiles)) {
         configParseDiagnostics.push(getErrorForNoInputFiles(configFileSpecs, configFileName));
@@ -3952,7 +3964,8 @@ export function matchesExclude(
     );
 }
 
-function matchesExcludeWorker(
+/** @internal */
+export function matchesExcludeWorker(
     pathToCheck: string,
     excludeSpecs: readonly string[] | undefined,
     useCaseSensitiveFileNames: boolean,

src/compiler/tsbuildPublic.ts

@@ -79,6 +79,7 @@ import {
     isIncrementalBuildInfo,
     isIncrementalCompilation,
     isPackageJsonInfo,
+    isSolutionConfig,
     loadWithModeAwareCache,
     maybeBind,
     missingFileModifiedTime,
@@ -1223,7 +1224,13 @@ function getNextInvalidatedProjectCreateInfo<T extends BuilderProgram>(
         else if (updateLevel === ProgramUpdateLevel.RootNamesAndUpdate) {
             // Update file names
             config.fileNames = getFileNamesFromConfigSpecs(config.options.configFile!.configFileSpecs!, getDirectoryPath(project), config.options, state.parseConfigFileHost);
-            updateErrorForNoInputFiles(config.fileNames, project, config.options.configFile!.configFileSpecs!, config.errors, canJsonReportNoInputFiles(config.raw));
+            updateErrorForNoInputFiles(
+                config.fileNames,
+                project,
+                config.options.configFile!.configFileSpecs!,
+                config.errors,
+                canJsonReportNoInputFiles(config.raw),
+            );
             watchInputFiles(state, project, projectPath, config);
             watchPackageJsonFiles(state, project, projectPath, config);
         }
@@ -1448,11 +1455,7 @@ function checkConfigFileUpToDateStatus<T extends BuilderProgram>(state: Solution
 
 function getUpToDateStatusWorker<T extends BuilderProgram>(state: SolutionBuilderState<T>, project: ParsedCommandLine, resolvedPath: ResolvedConfigFilePath): UpToDateStatus {
     // Container if no files are specified in the project
-    if (!project.fileNames.length && !canJsonReportNoInputFiles(project.raw)) {
-        return {
-            type: UpToDateStatusType.ContainerOnly,
-        };
-    }
+    if (isSolutionConfig(project)) return { type: UpToDateStatusType.ContainerOnly };
 
     // Fast check to see if reference projects are upto date and error free
     let referenceStatuses;

src/compiler/watchPublic.ts

@@ -925,7 +925,15 @@ export function createWatchProgram<T extends BuilderProgram>(host: WatchCompiler
 
         updateLevel = ProgramUpdateLevel.Update;
         rootFileNames = getFileNamesFromConfigSpecs(compilerOptions.configFile!.configFileSpecs!, getNormalizedAbsolutePath(getDirectoryPath(configFileName), currentDirectory), compilerOptions, parseConfigFileHost, extraFileExtensions);
-        if (updateErrorForNoInputFiles(rootFileNames, getNormalizedAbsolutePath(configFileName, currentDirectory), compilerOptions.configFile!.configFileSpecs!, configFileParsingDiagnostics!, canConfigFileJsonReportNoInputFiles)) {
+        if (
+            updateErrorForNoInputFiles(
+                rootFileNames,
+                getNormalizedAbsolutePath(configFileName, currentDirectory),
+                compilerOptions.configFile!.configFileSpecs!,
+                configFileParsingDiagnostics!,
+                canConfigFileJsonReportNoInputFiles,
+            )
+        ) {
             hasChangedConfigFileParsingErrors = true;
         }