Don't use needsUpdate for quick tasks

needsUpdate may be wrong when the branch changes; these ones are now so
fast thanks to being pure JS that we can just always run their contents
and be sure that the outputs are right.

Author: jakebailey

Diff for: Herebyfile.mjs

@@ -84,23 +84,19 @@ export const generateLibs = task({
     description: "Builds the library targets",
     run: async () => {
         await fs.promises.mkdir("./built/local", { recursive: true });
-        const allSources = libs.flatMap((lib) => lib.sources);
-        const allTargets = libs.flatMap((lib) => lib.target);
-        if (needsUpdate([copyright, ...allSources], allTargets)) {
-            for (const lib of libs) {
-                let output = getCopyrightHeader();
-
-                await fs.promises.writeFile(lib.target, getCopyrightHeader());
-                for (const source of lib.sources) {
-                    const contents = await fs.promises.readFile(source, "utf-8");
-                    // TODO(jakebailey): "\n\n" is for compatibility with our current tests; our test baselines
-                    // are sensitive to the positions of things in the lib files. Eventually remove this,
-                    // or remove lib.d.ts line numbers from our baselines.
-                    output += "\n\n" + contents.replace(/\r\n/g, "\n");
-                }
-
-                await fs.promises.writeFile(lib.target, output);
+        for (const lib of libs) {
+            let output = getCopyrightHeader();
+
+            await fs.promises.writeFile(lib.target, getCopyrightHeader());
+            for (const source of lib.sources) {
+                const contents = await fs.promises.readFile(source, "utf-8");
+                // TODO(jakebailey): "\n\n" is for compatibility with our current tests; our test baselines
+                // are sensitive to the positions of things in the lib files. Eventually remove this,
+                // or remove lib.d.ts line numbers from our baselines.
+                output += "\n\n" + contents.replace(/\r\n/g, "\n");
             }
+
+            await fs.promises.writeFile(lib.target, output);
         }
     },
 });
@@ -121,9 +117,7 @@ export const generateDiagnostics = task({
     name: "generate-diagnostics",
     description: "Generates a diagnostic file in TypeScript based on an input JSON file",
     run: async () => {
-        if (needsUpdate(diagnosticMessagesJson, [diagnosticMessagesGeneratedJson, diagnosticInformationMapTs])) {
-            await exec(process.execPath, ["scripts/processDiagnosticMessages.mjs", diagnosticMessagesJson]);
-        }
+        await exec(process.execPath, ["scripts/processDiagnosticMessages.mjs", diagnosticMessagesJson]);
     }
 });
 
@@ -156,9 +150,11 @@ const localizationTargets = localizationDirectories
 
 const localize = task({
     name: "localize",
+    dependencies: [generateDiagnostics],
     run: async () => {
-        await fs.promises.mkdir("./built/local", { recursive: true });
+        await fs.promises.mkdir("./built/local", { recursive: true });  // TODO(jakebailey): needed?
         if (needsUpdate(diagnosticMessagesGeneratedJson, generatedLCGFile)) {
+            // TODO(jakebailey): slow; need needsUpdate to not block the builds
             return exec(process.execPath, ["scripts/generateLocalizedDiagnosticMessages.mjs", "src/loc/lcl", "built/local", diagnosticMessagesGeneratedJson], { ignoreExitCode: true });
         }
     }
@@ -535,11 +531,9 @@ export const generateTypesMap = task({
     run: async () => {
         const source = "src/server/typesMap.json";
         const target = "built/local/typesMap.json";
-        if (needsUpdate(source, target)) {
-            const contents = await fs.promises.readFile(source, "utf-8");
-            JSON.parse(contents);
-            await fs.promises.writeFile(target, contents);
-        }
+        const contents = await fs.promises.readFile(source, "utf-8");
+        JSON.parse(contents); // Validates that the JSON parses.
+        await fs.promises.writeFile(target, contents);
     }
 });
 
@@ -554,15 +548,13 @@ cleanTasks.push(cleanTypesMap);
 // it to be synced to the Azure DevOps repo, so that it can get picked up by the build
 // pipeline that generates the localization artifacts that are then fed into the translation process.
 const builtLocalDiagnosticMessagesGeneratedJson = "built/local/diagnosticMessages.generated.json";
-const copyBuiltLocalDiagnosticMessages = task({
+export const copyBuiltLocalDiagnosticMessages = task({
     name: "copy-built-local-diagnostic-messages",
     dependencies: [generateDiagnostics],
     run: async () => {
-        if (needsUpdate(diagnosticMessagesGeneratedJson, builtLocalDiagnosticMessagesGeneratedJson)) {
-            const contents = await fs.promises.readFile(diagnosticMessagesGeneratedJson, "utf-8");
-            JSON.parse(contents);
-            await fs.promises.writeFile(builtLocalDiagnosticMessagesGeneratedJson, contents);
-        }
+        const contents = await fs.promises.readFile(diagnosticMessagesGeneratedJson, "utf-8");
+        JSON.parse(contents); // Validates that the JSON parses.
+        await fs.promises.writeFile(builtLocalDiagnosticMessagesGeneratedJson, contents);
     }
 });