If version of the input file does not change, dont mark as out of date

Author: sheetalkamat

src/compiler/builder.ts

@@ -762,13 +762,19 @@ namespace ts {
     }
 
     export interface ProgramBundleEmitBuildInfo {
+        fileNames: readonly string[];
+        fileInfos: readonly string[];
         options: CompilerOptions | undefined;
         outSignature?: string;
         dtsChangeTime?: number;
     }
 
     export type ProgramBuildInfo = ProgramMultiFileEmitBuildInfo | ProgramBundleEmitBuildInfo;
 
+    export function isProgramBundleEmitBuildInfo(info: ProgramBuildInfo): info is ProgramBundleEmitBuildInfo {
+        return !!outFile(info.options || {});
+    }
+
     /**
      * Gets the program information to be emitted in buildInfo so that we can use it to create new program
      */
@@ -779,7 +785,17 @@ namespace ts {
         const buildInfoDirectory = getDirectoryPath(getNormalizedAbsolutePath(getTsBuildInfoEmitOutputFilePath(state.compilerOptions)!, currentDirectory));
         state.dtsChangeTime = state.hasChangedEmitSignature ? getCurrentTime(host).getTime() : state.dtsChangeTime;
         if (outFilePath) {
+            const fileNames: string[] = [];
+            const fileInfos: string[] = [];
+            state.program!.getRootFileNames().forEach(f => {
+                const sourceFile = state.program!.getSourceFile(f);
+                if (!sourceFile) return;
+                fileNames.push(relativeToBuildInfo(sourceFile.resolvedPath));
+                fileInfos.push(sourceFile.version);
+            });
             const result: ProgramBundleEmitBuildInfo = {
+                fileNames,
+                fileInfos,
                 options: convertToProgramBuildInfoCompilerOptions(state.compilerOptions, "affectsBundleEmitBuildInfo"),
                 outSignature: state.outSignature,
                 dtsChangeTime: state.dtsChangeTime,
@@ -1370,40 +1386,52 @@ namespace ts {
                 { version: fileInfo.version, signature: fileInfo.signature === false ? undefined : fileInfo.version, affectsGlobalScope: fileInfo.affectsGlobalScope, impliedFormat: fileInfo.impliedFormat };
     }
 
-    export function createBuilderProgramUsingProgramBuildInfo(programFromBuildInfo: ProgramBuildInfo, buildInfoPath: string, host: ReadBuildProgramHost): EmitAndSemanticDiagnosticsBuilderProgram {
+    export function createBuilderProgramUsingProgramBuildInfo(program: ProgramBuildInfo, buildInfoPath: string, host: ReadBuildProgramHost): EmitAndSemanticDiagnosticsBuilderProgram {
         const buildInfoDirectory = getDirectoryPath(getNormalizedAbsolutePath(buildInfoPath, host.getCurrentDirectory()));
         const getCanonicalFileName = createGetCanonicalFileName(host.useCaseSensitiveFileNames());
 
-        const program = programFromBuildInfo as ProgramMultiFileEmitBuildInfo & ProgramBundleEmitBuildInfo;
-        const filePaths = program.fileNames?.map(toPath);
-        const filePathsSetList = program.fileIdsList?.map(fileIds => new Set(fileIds.map(toFilePath)));
-        const fileInfos = new Map<Path, BuilderState.FileInfo>();
-        const emitSignatures = program.options?.composite && !outFile(program.options) ? new Map<Path, string>() : undefined;
-        program.fileInfos?.forEach((fileInfo, index) => {
-            const path = toFilePath(index + 1 as ProgramBuildInfoFileId);
-            const stateFileInfo = toBuilderStateFileInfo(fileInfo);
-            fileInfos.set(path, stateFileInfo);
-            if (emitSignatures && stateFileInfo.signature) emitSignatures.set(path, stateFileInfo.signature);
-        });
-        program.emitSignatures?.forEach(value => {
-            if (isNumber(value)) emitSignatures!.delete(toFilePath(value));
-            else emitSignatures!.set(toFilePath(value[0]), value[1]);
-        });
-        const state: ReusableBuilderProgramState = {
-            fileInfos,
-            compilerOptions: program.options ? convertToOptionsWithAbsolutePaths(program.options, toAbsolutePath) : {},
-            referencedMap: toManyToManyPathMap(program.referencedMap),
-            exportedModulesMap: toManyToManyPathMap(program.exportedModulesMap),
-            semanticDiagnosticsPerFile: program.semanticDiagnosticsPerFile && arrayToMap(program.semanticDiagnosticsPerFile, value => toFilePath(isNumber(value) ? value : value[0]), value => isNumber(value) ? emptyArray : value[1]),
-            hasReusableDiagnostic: true,
-            affectedFilesPendingEmit: map(program.affectedFilesPendingEmit, value => toFilePath(value[0])),
-            affectedFilesPendingEmitKind: program.affectedFilesPendingEmit && arrayToMap(program.affectedFilesPendingEmit, value => toFilePath(value[0]), value => value[1]),
-            affectedFilesPendingEmitIndex: program.affectedFilesPendingEmit && 0,
-            changedFilesSet: new Set(map(program.changeFileSet, toFilePath)),
-            dtsChangeTime: program.dtsChangeTime,
-            emitSignatures: emitSignatures?.size ? emitSignatures : undefined,
-            outSignature: program.outSignature,
-        };
+        let state: ReusableBuilderProgramState;
+        let filePaths: Path[] | undefined;
+        let filePathsSetList: Set<Path>[] | undefined;
+        if (isProgramBundleEmitBuildInfo(program)) {
+            state = {
+                fileInfos: new Map(),
+                compilerOptions: program.options ? convertToOptionsWithAbsolutePaths(program.options, toAbsolutePath) : {},
+                dtsChangeTime: program.dtsChangeTime,
+                outSignature: program.outSignature,
+            };
+        }
+        else {
+            filePaths = program.fileNames?.map(toPath);
+            filePathsSetList = program.fileIdsList?.map(fileIds => new Set(fileIds.map(toFilePath)));
+            const fileInfos = new Map<Path, BuilderState.FileInfo>();
+            const emitSignatures = program.options?.composite && !outFile(program.options) ? new Map<Path, string>() : undefined;
+            program.fileInfos.forEach((fileInfo, index) => {
+                const path = toFilePath(index + 1 as ProgramBuildInfoFileId);
+                const stateFileInfo = toBuilderStateFileInfo(fileInfo);
+                fileInfos.set(path, stateFileInfo);
+                if (emitSignatures && stateFileInfo.signature) emitSignatures.set(path, stateFileInfo.signature);
+            });
+            program.emitSignatures?.forEach(value => {
+                if (isNumber(value)) emitSignatures!.delete(toFilePath(value));
+                else emitSignatures!.set(toFilePath(value[0]), value[1]);
+            });
+            state = {
+                fileInfos,
+                compilerOptions: program.options ? convertToOptionsWithAbsolutePaths(program.options, toAbsolutePath) : {},
+                referencedMap: toManyToManyPathMap(program.referencedMap),
+                exportedModulesMap: toManyToManyPathMap(program.exportedModulesMap),
+                semanticDiagnosticsPerFile: program.semanticDiagnosticsPerFile && arrayToMap(program.semanticDiagnosticsPerFile, value => toFilePath(isNumber(value) ? value : value[0]), value => isNumber(value) ? emptyArray : value[1]),
+                hasReusableDiagnostic: true,
+                affectedFilesPendingEmit: map(program.affectedFilesPendingEmit, value => toFilePath(value[0])),
+                affectedFilesPendingEmitKind: program.affectedFilesPendingEmit && arrayToMap(program.affectedFilesPendingEmit, value => toFilePath(value[0]), value => value[1]),
+                affectedFilesPendingEmitIndex: program.affectedFilesPendingEmit && 0,
+                changedFilesSet: new Set(map(program.changeFileSet, toFilePath)),
+                dtsChangeTime: program.dtsChangeTime,
+                emitSignatures: emitSignatures?.size ? emitSignatures : undefined,
+            };
+        }
+
         return {
             getState: () => state,
             backupEmitState: noop,
@@ -1438,7 +1466,7 @@ namespace ts {
         }
 
         function toFilePath(fileId: ProgramBuildInfoFileId) {
-            return filePaths[fileId - 1];
+            return filePaths![fileId - 1];
         }
 
         function toFilePathsSet(fileIdsListId: ProgramBuildInfoFileIdListId) {
@@ -1458,6 +1486,22 @@ namespace ts {
         }
     }
 
+    export function getBuildInfoFileVersionMap(
+        program: ProgramBuildInfo,
+        buildInfoPath: string,
+        host: Pick<ReadBuildProgramHost, "useCaseSensitiveFileNames" | "getCurrentDirectory">
+    ): ESMap<Path, string> {
+        const buildInfoDirectory = getDirectoryPath(getNormalizedAbsolutePath(buildInfoPath, host.getCurrentDirectory()));
+        const getCanonicalFileName = createGetCanonicalFileName(host.useCaseSensitiveFileNames());
+        const fileInfos = new Map<Path, string>();
+        program.fileInfos.forEach((fileInfo, index) => {
+            const path = toPath(program.fileNames[index], buildInfoDirectory, getCanonicalFileName);
+            const version = isString(fileInfo) ? fileInfo : (fileInfo as ProgramBuildInfoBuilderStateFileInfo).version;
+            fileInfos.set(path, version);
+        });
+        return fileInfos;
+    }
+
     export function createRedirectedBuilderProgram(getState: () => { program?: Program | undefined; compilerOptions: CompilerOptions; }, configFileParsingDiagnostics: readonly Diagnostic[]): BuilderProgram {
         return {
             getState: notImplemented,

src/compiler/builderState.ts

@@ -20,14 +20,14 @@ namespace ts {
          * Otherwise undefined
          * Thus non undefined value indicates, module emit
          */
-        readonly referencedMap: BuilderState.ReadonlyManyToManyPathMap | undefined;
+        readonly referencedMap?: BuilderState.ReadonlyManyToManyPathMap | undefined;
         /**
          * Contains the map of exported modules ReferencedSet=exported module files from the file if module emit is enabled
          * Otherwise undefined
          *
          * This is equivalent to referencedMap, but for the emitted .d.ts file.
          */
-        readonly exportedModulesMap: BuilderState.ManyToManyPathMap | undefined;
+        readonly exportedModulesMap?: BuilderState.ManyToManyPathMap | undefined;
 
         /**
          * true if file version is used as signature

src/compiler/diagnosticMessages.json

@@ -5276,6 +5276,10 @@
         "category": "Message",
         "code": 6399
     },
+    "Project '{0}' is up to date but needs update to timestamps of output files that are older than input files": {
+        "category": "Message",
+        "code": 6400
+    },
 
     "The expected type comes from property '{0}' which is declared here on type '{1}'": {
         "category": "Message",

src/compiler/tsbuild.ts

@@ -23,6 +23,7 @@ namespace ts {
         UpstreamBlocked,
         ComputingUpstream,
         TsVersionOutputOfDate,
+        UpToDateWithInputFileText,
 
         /**
          * Projects with no outputs (i.e. "solution" files)
@@ -68,7 +69,7 @@ namespace ts {
          * We track what the newest input file is.
          */
         export interface UpToDate {
-            type: UpToDateStatusType.UpToDate | UpToDateStatusType.UpToDateWithUpstreamTypes;
+            type: UpToDateStatusType.UpToDate | UpToDateStatusType.UpToDateWithUpstreamTypes | UpToDateStatusType.UpToDateWithInputFileText;
             newestInputFileTime?: Date;
             newestInputFileName?: string;
             newestDeclarationFileContentChangedTime: Date | undefined;

src/compiler/tsbuildPublic.ts

@@ -1256,7 +1256,7 @@ namespace ts {
                     continue;
                 }
 
-                if (status.type === UpToDateStatusType.UpToDateWithUpstreamTypes) {
+                if (status.type === UpToDateStatusType.UpToDateWithUpstreamTypes || status.type === UpToDateStatusType.UpToDateWithInputFileText) {
                     reportAndStoreErrors(state, projectPath, getConfigFileParsingDiagnostics(config));
                     return createUpdateOutputFileStampsProject(
                         state,
@@ -1517,6 +1517,8 @@ namespace ts {
         let oldestOutputFileName = "(none)";
         let oldestOutputFileTime = maximumDate;
         let buildInfoTime: Date | undefined;
+        let buildInfoProgram: ProgramBuildInfo | undefined;
+        let buildInfoVersionMap: ESMap<Path, string> | undefined;
         let newestDeclarationFileContentChangedTime;
         if (buildInfoPath) {
             const buildInfoCacheEntry = getBuildInfoCacheEntry(state, buildInfoPath, resolvedPath);
@@ -1551,6 +1553,7 @@ namespace ts {
                         buildInfoFile: buildInfoPath
                     };
                 }
+                buildInfoProgram = buildInfo.program;
             }
 
             oldestOutputFileTime = buildInfoTime;
@@ -1561,6 +1564,7 @@ namespace ts {
         // Check input files
         let newestInputFileName: string = undefined!;
         let newestInputFileTime = minimumDate;
+        let pseudoInputUptodate = false;
         // Get timestamps of input files
         for (const inputFile of project.fileNames) {
             const inputTime = getModifiedTime(state, inputFile);
@@ -1573,11 +1577,24 @@ namespace ts {
 
             // If an buildInfo is older than the newest input, we can stop checking
             if (buildInfoTime && buildInfoTime < inputTime) {
-                return {
-                    type: UpToDateStatusType.OutOfDateWithSelf,
-                    outOfDateOutputFileName: buildInfoPath!,
-                    newerInputFileName: inputFile
-                };
+                let version: string | undefined;
+                let currentVersion: string | undefined;
+                if (buildInfoProgram) {
+                    // Read files and see if they are same, read is anyways cached
+                    if (!buildInfoVersionMap) buildInfoVersionMap = getBuildInfoFileVersionMap(buildInfoProgram, buildInfoPath!, host);
+                    version = buildInfoVersionMap.get(toPath(state, inputFile));
+                    const text = version ? state.readFileWithCache(inputFile) : undefined;
+                    currentVersion = text && (host.createHash || generateDjb2Hash)(text);
+                    if (version && version === currentVersion) pseudoInputUptodate = true;
+                }
+
+                if (!version || version !== currentVersion) {
+                    return {
+                        type: UpToDateStatusType.OutOfDateWithSelf,
+                        outOfDateOutputFileName: buildInfoPath!,
+                        newerInputFileName: inputFile
+                    };
+                }
             }
 
             if (inputTime > newestInputFileTime) {
@@ -1692,7 +1709,11 @@ namespace ts {
 
         // Up to date
         return {
-            type: pseudoUpToDate ? UpToDateStatusType.UpToDateWithUpstreamTypes : UpToDateStatusType.UpToDate,
+            type: pseudoUpToDate ?
+                UpToDateStatusType.UpToDateWithUpstreamTypes :
+                pseudoInputUptodate ?
+                    UpToDateStatusType.UpToDateWithInputFileText :
+                    UpToDateStatusType.UpToDate,
             newestDeclarationFileContentChangedTime,
             newestInputFileTime,
             newestInputFileName,
@@ -1845,6 +1866,7 @@ namespace ts {
                             }
                             // falls through
 
+                        case UpToDateStatusType.UpToDateWithInputFileText:
                         case UpToDateStatusType.UpToDateWithUpstreamTypes:
                         case UpToDateStatusType.OutOfDateWithPrepend:
                             if (!(buildResult & BuildResultFlags.DeclarationOutputUnchanged)) {
@@ -2289,6 +2311,12 @@ namespace ts {
                     Diagnostics.Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies,
                     relName(state, configFileName)
                 );
+            case UpToDateStatusType.UpToDateWithInputFileText:
+                return reportStatus(
+                    state,
+                    Diagnostics.Project_0_is_up_to_date_but_needs_update_to_timestamps_of_output_files_that_are_older_than_input_files,
+                    relName(state, configFileName)
+                );
             case UpToDateStatusType.UpstreamOutOfDate:
                 return reportStatus(
                     state,