build-system: only write version.txt once per dir (#36162)

* build-system: only write version.txt once

* output full set of

* sort the paths

* write files...not directories

* succinct format

build-system/tasks/dist.js

@@ -23,6 +23,9 @@ const {
 const {
   displayLifecycleDebugging,
 } = require('../compile/debug-compilation-lifecycle');
+const {
+  VERSION: internalRuntimeVersion,
+} = require('../compile/internal-version');
 const {buildCompiler} = require('../compile/build-compiler');
 const {buildExtensions, parseExtensionFlags} = require('./extension-helpers');
 const {buildVendorConfigs} = require('./3p-vendor-helpers');
@@ -118,6 +121,7 @@ async function dist() {
     await compileCoreRuntime(options);
   } else {
     await Promise.all([
+      writeVersionFiles(),
       buildExperiments(),
       buildLoginDone('0.1'),
       buildWebPushPublisherFiles(),
@@ -147,6 +151,26 @@ async function dist() {
   }
 }
 
+/**
+ * Writes the verion.txt file.
+ * @return {!Promise}
+ */
+async function writeVersionFiles() {
+  // TODO: determine which of these are necessary and trim the rest via an I2D.
+  const paths = [
+    'dist',
+    'dist/v0',
+    'dist/v0/examples',
+    'dist.tools/experiments',
+    `dist.3p/${internalRuntimeVersion}`,
+    `dist.3p/${internalRuntimeVersion}/vendor`,
+  ].map((p) => path.join(...p.split('/'), 'version.txt'));
+
+  return Promise.all(
+    paths.map((p) => fs.outputFile(p, internalRuntimeVersion))
+  );
+}
+
 /**
  * Build AMP experiments.js.
  * @return {Promise<void>}

build-system/tasks/helpers.js

@@ -313,7 +313,6 @@ async function compileMinifiedJs(srcDir, srcFilename, destDir, options) {
 
   const destPath = path.join(destDir, minifiedName);
   combineWithCompiledFile(srcFilename, destPath, options);
-  fs.writeFileSync(path.join(destDir, 'version.txt'), internalRuntimeVersion);
   if (options.latestName) {
     fs.copySync(
       destPath,
@@ -403,14 +402,6 @@ async function esbuildCompile(srcDir, srcFilename, destDir, options) {
     return watchedTargets.get(entryPoint).rebuild();
   }
 
-  // TODO(36162): Only write this once as part of the dist() function.
-  if (options.minify) {
-    fs.outputFileSync(
-      path.join(destDir, 'version.txt'),
-      internalRuntimeVersion
-    );
-  }
-
   /**
    * Splits up the wrapper to compute the banner and footer
    * @return {Object}