Release: correct build date in verification; other improvements

- the date is actually the date of the commit *prior*
  to the tag commit, as the files are built and then committed.
- also, the CDN should still be checked for non-stable releases,
  and should use different filenames (including in the map files).
- certain files should be skipped when checking the CDN.
- removed file diffing because it ended up being far too noisy,
  making it difficult to find the info I needed.
- because the build script required an addition, release
  verification will not work until the next release.
- print all files in failure case and whether each matched
- avoid npm script log in GH release notes changelog
- exclude changelog.md from release:clean command
- separate the post-release script from release-it for now, so we
  can keep manual verification before each push. The exact command is
  printed at the ened for convenience.

Closes gh-5521

4 files changed, 103 insertions, 50 deletions

diff --git a/build/release/README.md b/build/release/README.md
index 7d050d336..9aef670a1 100644
--- a/build/release/README.md
+++ b/build/release/README.md
@@ -84,6 +84,14 @@ The release script will not run without this token.
 
 	**Note**: `preReleaseBase` is set in the npm script to `1` to ensure any pre-releases start at `.1` instead of `.0`. This does not interfere with stable releases.
 
+1. Run the post-release script:
+
+	```sh
+	./build/release/post-release.sh $VERSION $BLOG_URL
+	```
+
+	This will push the release files to the CDN and jquery-dist repos, and push the commit to the jQuery repo to remove the release files and update the AUTHORS.txt URL in the package.json.
+
 1. Once the release is complete, publish the blog post.
 
 ## Stable releases
diff --git a/build/release/post-release.sh b/build/release/post-release.sh
index 2bc4e2657..6cc4d6517 100644
--- a/build/release/post-release.sh
+++ b/build/release/post-release.sh
@@ -51,7 +51,7 @@ git add package.json
 # Leave the tmp folder as some files are needed
 # after the release (such as for emailing archives).
 npm run build:clean
-git rm --cached -r dist/ dist-module
+git rm --cached -r dist/ dist-module/
 git add dist/package.json dist/wrappers dist-module/package.json dist-module/wrappers
 git commit -m "Release: remove dist files from main branch"
 
diff --git a/build/release/verify.js b/build/release/verify.js
index f167666b2..423a63c8c 100644
--- a/build/release/verify.js
+++ b/build/release/verify.js
@@ -1,9 +1,6 @@
 /**
  * Verify the latest release is reproducible
- * Works with versions 4.0.0-beta.2 and later
  */
-import chalk from "chalk";
-import * as Diff from "diff";
 import { exec as nodeExec } from "node:child_process";
 import crypto from "node:crypto";
 import { createWriteStream } from "node:fs";
@@ -22,7 +19,12 @@ const SRC_REPO = "https://github.com/jquery/jquery.git";
 const CDN_URL = "https://code.jquery.com";
 const REGISTRY_URL = "https://registry.npmjs.org/jquery";
 
-const rstable = /^(\d+\.\d+\.\d+)$/;
+const excludeFromCDN = [
+	/^package\.json$/,
+	/^jquery\.factory\./
+];
+
+const rjquery = /^jquery/;
 
 async function verifyRelease( { version } = {} ) {
 	if ( !version ) {
@@ -33,24 +35,34 @@ async function verifyRelease( { version } = {} ) {
 	console.log( `Verifying jQuery ${ version }...` );
 
 	let verified = true;
+	const matchingFiles = [];
+	const mismatchingFiles = [];
 
-	// Only check stable versions against the CDN
-	if ( rstable.test( version ) ) {
-		await Promise.all(
-			release.files.map( async( file ) => {
-				const cdnContents = await fetch( new URL( file.name, CDN_URL ) ).then(
-					( res ) => res.text()
-				);
-				if ( cdnContents !== file.contents ) {
-					console.log( `${ file.name } is different from the CDN:` );
-					diffFiles( file.contents, cdnContents );
+	// Check all files against the CDN
+	await Promise.all(
+		release.files
+			.filter( ( file ) => excludeFromCDN.every( ( re ) => !re.test( file.name ) ) )
+			.map( async( file ) => {
+				const url = new URL( file.cdnName, CDN_URL );
+				const response = await fetch( url );
+				if ( !response.ok ) {
+					throw new Error(
+						`Failed to download ${
+							file.cdnName
+						} from the CDN: ${ response.statusText }`
+					);
+				}
+				const cdnContents = await response.text();
+				if ( cdnContents !== file.cdnContents ) {
+					mismatchingFiles.push( url.href );
 					verified = false;
+				} else {
+					matchingFiles.push( url.href );
 				}
 			} )
-		);
-	}
+	);
 
-	// Check all releases against npm.
+	// Check all files against npm.
 	// First, download npm tarball for version
 	const npmPackage = await fetch( REGISTRY_URL ).then( ( res ) => res.json() );
 
@@ -66,9 +78,10 @@ async function verifyRelease( { version } = {} ) {
 	// Check the tarball checksum
 	const tgzSum = await sumTarball( npmTarballPath );
 	if ( tgzSum !== release.tgz.contents ) {
-		console.log( `${ version }.tgz is different from npm:` );
-		diffFiles( release.tgz.contents, tgzSum );
+		mismatchingFiles.push( `npm:${ version }.tgz` );
 		verified = false;
+	} else {
+		matchingFiles.push( `npm:${ version }.tgz` );
 	}
 
 	await Promise.all(
@@ -80,16 +93,26 @@ async function verifyRelease( { version } = {} ) {
 			);
 
 			if ( npmContents !== file.contents ) {
-				console.log( `${ file.name } is different from the CDN:` );
-				diffFiles( file.contents, npmContents );
+				mismatchingFiles.push( `npm:${ file.path }/${ file.name }` );
 				verified = false;
+			} else {
+				matchingFiles.push( `npm:${ file.path }/${ file.name }` );
 			}
 		} )
 	);
 
 	if ( verified ) {
-		console.log( `jQuery ${ version } is reproducible!` );
+		console.log( `jQuery ${ version } is reproducible! All files match!` );
 	} else {
+		console.log();
+		for ( const file of matchingFiles ) {
+			console.log( `✅ ${ file }` );
+		}
+		console.log();
+		for ( const file of mismatchingFiles ) {
+			console.log( `❌ ${ file }` );
+		}
+
 		throw new Error( `jQuery ${ version } is NOT reproducible!` );
 	}
 }
@@ -101,19 +124,32 @@ async function buildRelease( { version } ) {
 	console.log( `Cloning jQuery ${ version }...` );
 	await rimraf( releaseFolder );
 	await mkdir( releaseFolder, { recursive: true } );
+
+	// Uses a depth of 2 so we can get the commit date of
+	// the commit used to build, which is the commit before the tag
 	await exec(
-		`git clone -q -b ${ version } --depth=1 ${ SRC_REPO } ${ releaseFolder }`
+		`git clone -q -b ${ version } --depth=2 ${ SRC_REPO } ${ releaseFolder }`
 	);
 
 	// Install node dependencies
 	console.log( `Installing dependencies for jQuery ${ version }...` );
 	await exec( "npm ci", { cwd: releaseFolder } );
 
+	// Find the date of the commit just before the release,
+	// which was used as the date in the built files
+	const { stdout: date } = await exec( "git log -1 --format=%ci HEAD~1", {
+		cwd: releaseFolder
+	} );
+
 	// Build the release
 	console.log( `Building jQuery ${ version }...` );
 	const { stdout: buildOutput } = await exec( "npm run build:all", {
 		cwd: releaseFolder,
 		env: {
+
+			// Keep existing environment variables
+			...process.env,
+			RELEASE_DATE: date,
 			VERSION: version
 		}
 	} );
@@ -125,24 +161,35 @@ async function buildRelease( { version } ) {
 	console.log( packOutput );
 
 	// Get all top-level /dist and /dist-module files
-	const distFiles = await readdir( path.join( releaseFolder, "dist" ), {
-		withFileTypes: true
-	} );
+	const distFiles = await readdir(
+		path.join( releaseFolder, "dist" ),
+		{ withFileTypes: true }
+	);
 	const distModuleFiles = await readdir(
 		path.join( releaseFolder, "dist-module" ),
-		{
-			withFileTypes: true
-		}
+		{ withFileTypes: true }
 	);
 
 	const files = await Promise.all(
 		[ ...distFiles, ...distModuleFiles ]
 			.filter( ( dirent ) => dirent.isFile() )
-			.map( async( dirent ) => ( {
-				name: dirent.name,
-				path: path.basename( dirent.parentPath ),
-				contents: await readFile( path.join( dirent.parentPath, dirent.name ), "utf8" )
-			} ) )
+			.map( async( dirent ) => {
+				const contents = await readFile(
+					path.join( dirent.parentPath, dirent.name ),
+					"utf8"
+				);
+				return {
+					name: dirent.name,
+					path: path.basename( dirent.parentPath ),
+					contents,
+					cdnName: dirent.name.replace( rjquery, `jquery-${ version }` ),
+					cdnContents: dirent.name.endsWith( ".map" ) ?
+
+						// The CDN has versioned filenames in the maps
+						convertMapToVersioned( contents, version ) :
+						contents
+				};
+			} )
 	);
 
 	// Get checksum of the tarball
@@ -166,20 +213,6 @@ async function downloadFile( url, dest ) {
 	return finished( stream );
 }
 
-async function diffFiles( a, b ) {
-	const diff = Diff.diffLines( a, b );
-
-	diff.forEach( ( part ) => {
-		if ( part.added ) {
-			console.log( chalk.green( part.value ) );
-		} else if ( part.removed ) {
-			console.log( chalk.red( part.value ) );
-		} else {
-			console.log( part.value );
-		}
-	} );
-}
-
 async function getLatestVersion() {
 	const { stdout: sha } = await exec( "git rev-list --tags --max-count=1" );
 	const { stdout: tag } = await exec( `git describe --tags ${ sha.trim() }` );
@@ -198,4 +231,13 @@ async function sumTarball( filepath ) {
 	return shasum( unzipped );
 }
 
+function convertMapToVersioned( contents, version ) {
+	const map = JSON.parse( contents );
+	return JSON.stringify( {
+		...map,
+		file: map.file.replace( rjquery, `jquery-${ version }` ),
+		sources: map.sources.map( ( source ) => source.replace( rjquery, `jquery-${ version }` ) )
+	} );
+}
+
 verifyRelease();
diff --git a/build/tasks/build.js b/build/tasks/build.js
index 1a3ed1d82..d05f7daf0 100644
--- a/build/tasks/build.js
+++ b/build/tasks/build.js
@@ -148,7 +148,10 @@ async function getLastModifiedDate() {
 async function writeCompiled( { code, dir, filename, version } ) {
 
 	// Use the last modified date so builds are reproducible
-	const date = await getLastModifiedDate();
+	const date = process.env.RELEASE_DATE ?
+		new Date( process.env.RELEASE_DATE ) :
+		await getLastModifiedDate();
+
 	const compiledContents = code
 
 		// Embed Version