From 78441368328b0fe60aa46f69bb36ee26af97c8ae Mon Sep 17 00:00:00 2001
From: Andrea Bueide <abueide@twilio.com>
Date: Fri, 9 Oct 2026 10:14:46 -0500
Subject: [PATCH] fix(core): stamp libraryInfo.version with the version being
 released

Since #1141 stopped committing version bumps, packages/core/package.json on
master stayed at 2.21.4, and the build that runs before semantic-release baked
that into info.ts/info.js. Every release since 2.22.0 reports
context.library.version 2.21.4.

Add a local semantic-release prepare plugin for core that runs after
@semantic-release/npm's prepare, rebuilds with SEGMENT_LIBRARY_VERSION set to
nextRelease.version, and refuses to publish if src/info.ts or lib/*/info.js
don't carry that version. constants-generator.js reads the env var and falls
back to package.json for local builds.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
---
 .eslintignore                          |  3 ++-
 devbox.lock                            |  2 +-
 packages/core/constants-generator.js   | 13 +++++-----
 packages/core/release-stamp-version.js | 33 ++++++++++++++++++++++++++
 packages/core/release.config.js        |  8 +++++++
 5 files changed, 50 insertions(+), 9 deletions(-)
 create mode 100644 packages/core/release-stamp-version.js

diff --git a/.eslintignore b/.eslintignore
index 4a3581756..9190755ae 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -9,4 +9,5 @@ examples/
 **/*.config.js
 **/*.config.base.js
 .eslintrc.js
-constants-generator.js
\ No newline at end of file
+constants-generator.js
+release-stamp-version.js
\ No newline at end of file
diff --git a/devbox.lock b/devbox.lock
index 63e5a592d..8fd623830 100644
--- a/devbox.lock
+++ b/devbox.lock
@@ -199,7 +199,7 @@
     },
     "nodejs@22": {
       "last_modified": "2026-03-27T11:17:38Z",
-      "plugin_version": "0.0.2",
+      "plugin_version": "0.0.4",
       "resolved": "github:NixOS/nixpkgs/832efc09b4caf6b4569fbf9dc01bec3082a00611#nodejs_22",
       "source": "devbox-search",
       "version": "22.22.2",
diff --git a/packages/core/constants-generator.js b/packages/core/constants-generator.js
index 314ac7f50..53baef5c0 100644
--- a/packages/core/constants-generator.js
+++ b/packages/core/constants-generator.js
@@ -1,17 +1,16 @@
 const fs = require('fs');
 const packageJson = require('./package.json');
 
+// The release passes the computed version here because package.json on master is not bumped (see release-stamp-version.js).
+const version = process.env.SEGMENT_LIBRARY_VERSION || packageJson.version;
+
 const body = `
 export const libraryInfo = {
   name: '${packageJson.name}',
-  version: '${packageJson.version}',
+  version: '${version}',
 }
 `;
 
-fs.writeFile('./src/info.ts', body, function (err) {
-  if (err) {
-    return console.log(err);
-  }
+fs.writeFileSync('./src/info.ts', body);
 
-  console.log('Configuration file has generated');
-});
+console.log(`Configuration file has generated (version ${version})`);
diff --git a/packages/core/release-stamp-version.js b/packages/core/release-stamp-version.js
new file mode 100644
index 000000000..f44edc222
--- /dev/null
+++ b/packages/core/release-stamp-version.js
@@ -0,0 +1,33 @@
+const { execFileSync } = require('child_process');
+const fs = require('fs');
+const path = require('path');
+
+const STAMPED_FILES = [
+  'src/info.ts',
+  'lib/commonjs/info.js',
+  'lib/module/info.js',
+];
+
+// Local semantic-release plugin: rebuilds core with the version semantic-release just computed, so the published lib/ reports it.
+async function prepare(_pluginConfig, { cwd, nextRelease, logger }) {
+  const { version } = nextRelease;
+  logger.log(`Stamping ${version} into libraryInfo and rebuilding`);
+
+  execFileSync('yarn', ['build'], {
+    cwd,
+    stdio: 'inherit',
+    env: { ...process.env, SEGMENT_LIBRARY_VERSION: version },
+  });
+
+  const quoted = new RegExp(`['"]${version.replace(/[.+]/g, '\\$&')}['"]`);
+  for (const file of STAMPED_FILES) {
+    const contents = fs.readFileSync(path.join(cwd, file), 'utf8');
+    if (!quoted.test(contents)) {
+      throw new Error(
+        `${file} is not stamped with ${version}; refusing to publish`
+      );
+    }
+  }
+}
+
+module.exports = { prepare };
diff --git a/packages/core/release.config.js b/packages/core/release.config.js
index 94ad927e6..432361c70 100644
--- a/packages/core/release.config.js
+++ b/packages/core/release.config.js
@@ -1,3 +1,11 @@
+const { plugins } = require('../../release.config.js');
+
 module.exports = {
   extends: ['../../release.config.js'],
+  // Runs right after @semantic-release/npm's prepare (version bump) and before its publish.
+  plugins: plugins.flatMap((plugin) =>
+    [].concat(plugin)[0] === '@semantic-release/npm'
+      ? [plugin, './release-stamp-version.js']
+      : [plugin]
+  ),
 };