From db9686b55355b51af21e548f3795e97c499d6576 Mon Sep 17 00:00:00 2001
From: Mark Vieira <portugee@gmail.com>
Date: Tue, 4 Mar 2025 09:25:11 -0800
Subject: [PATCH] Add build artifact containing json file of all wire
 compatible versions (#123740)

(cherry picked from commit e54037b7d0d2e66a2e6f50809e2efb199ab7a09a)

# Conflicts:
#	build.gradle
---
 build.gradle | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/build.gradle b/build.gradle
index 1d6788ad13e94..abecea6742682 100644
--- a/build.gradle
+++ b/build.gradle
@@ -222,6 +222,22 @@ tasks.register("verifyVersions") {
   }
 }
 
+def generateUpgradeCompatibilityFile = tasks.register("generateUpgradeCompatibilityFile") {
+  def outputFile = project.layout.buildDirectory.file("rolling-upgrade-compatible-${VersionProperties.elasticsearch}.json")
+  def rollingUpgradeCompatibleVersions = buildParams.bwcVersions.wireCompatible - VersionProperties.elasticsearchVersion
+  inputs.property("rollingUpgradeCompatibleVersions", rollingUpgradeCompatibleVersions)
+  outputs.file(outputFile)
+  doLast {
+    def versionsString = rollingUpgradeCompatibleVersions.collect { "\"${it.toString()}\"" }.join(', ')
+    outputFile.get().asFile.write("""{"rolling_upgrade_compatible_versions" : [${versionsString}]}""")
+  }
+}
+
+def upgradeCompatibilityZip = tasks.register("upgradeCompatibilityZip", Zip) {
+  archiveFile.set(project.layout.buildDirectory.file("rolling-upgrade-compatible-${VersionProperties.elasticsearch}.zip"))
+  from(generateUpgradeCompatibilityFile)
+}
+
 /*
  * When adding backcompat behavior that spans major versions, temporarily
  * disabling the backcompat tests is necessary. This flag controls
@@ -490,6 +506,7 @@ tasks.register("buildReleaseArtifacts").configure {
   }
     .collect { GradleUtils.findByName(it.tasks, 'assemble') }
     .findAll { it != null }
+  dependsOn upgradeCompatibilityZip
 }
 
 tasks.register("spotlessApply").configure {