From ca9151fa24222ff33ca0cc412b5c1ba8b9c65158 Mon Sep 17 00:00:00 2001
From: Marc Handalian <handalm@amazon.com>
Date: Fri, 15 Apr 2022 13:09:33 -0700
Subject: [PATCH] Add Github Workflow to build and publish lucene snapshots.
 (#2906)

This change introduces a github workflow so that we can build and push snapshots of lucene.
The RepositoriesSetupPlugin is also updated with a url from where these snapshots can be retrieved.

Signed-off-by: Marc Handalian <handalm@amazon.com>
---
 .github/workflows/lucene-snapshots.yml        | 55 +++++++++++++++++++
 DEVELOPER_GUIDE.md                            |  6 ++
 .../gradle/RepositoriesSetupPlugin.java       |  3 +-
 3 files changed, 62 insertions(+), 2 deletions(-)
 create mode 100644 .github/workflows/lucene-snapshots.yml

diff --git a/.github/workflows/lucene-snapshots.yml b/.github/workflows/lucene-snapshots.yml
new file mode 100644
index 00000000000..0fe025ad1aa
--- /dev/null
+++ b/.github/workflows/lucene-snapshots.yml
@@ -0,0 +1,55 @@
+# This workflow will check out, build, and publish snapshots of lucene.
+
+name: OpenSearch Lucene snapshots
+
+on:
+  workflow_dispatch:
+    # Inputs the workflow accepts.
+    inputs:
+      ref:
+        description:
+        required: false
+        default: 'main'
+
+jobs:
+  publish-snapshots:
+    runs-on: ubuntu-latest
+    # These permissions are needed to interact with GitHub's OIDC Token endpoint.
+    permissions:
+      id-token: write
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK 17
+        uses: actions/setup-java@v2
+        with:
+          java-version: '17'
+          distribution: 'adopt'
+
+      - name: Checkout Lucene
+        uses: actions/checkout@v2
+        with:
+          repository: 'apache/lucene'
+          path: lucene
+          ref: ${{ github.event.inputs.ref }}
+
+      - name: Set hash
+        working-directory: ./lucene
+        run: |
+          echo "::set-output name=REVISION::$(git rev-parse --short HEAD)"
+        id: version
+
+      - name: Publish Lucene to local maven repo.
+        working-directory: ./lucene
+        run: ./gradlew publishJarsPublicationToMavenLocal -Pversion.suffix=snapshot-${{ steps.version.outputs.REVISION }}
+
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          role-to-assume: ${{ secrets.LUCENE_SNAPSHOTS_ROLE }}
+          aws-region: us-west-2
+
+      - name: Copy files to S3 with the aws CLI.
+        run: |
+          aws s3 cp ~/.m2/repository/org/apache/lucene/ s3://${{ secrets.LUCENE_SNAPSHOTS_BUCKET }}/snapshots/lucene/org/apache/lucene/  --recursive --no-progress
diff --git a/DEVELOPER_GUIDE.md b/DEVELOPER_GUIDE.md
index 11fcb324c8c..70abfda7673 100644
--- a/DEVELOPER_GUIDE.md
+++ b/DEVELOPER_GUIDE.md
@@ -49,6 +49,7 @@
   - [Submitting Changes](#submitting-changes)
   - [Backports](#backports)
   - [LineLint](#linelint)
+  - [Lucene Snapshots](#lucene-snapshots)
 
 # Developer Guide
 
@@ -488,3 +489,8 @@ Executing the binary will automatically search the local directory tree for lint
 Pass a list of files or directories to limit your search.
 
     linelint README.md LICENSE
+
+# Lucene Snapshots
+The Github workflow in [lucene-snapshots.yml](.github/workflows/lucene-snapshots.yml) is a Github worfklow executable by maintainers to build a top-down snapshot build of lucene.
+These snapshots are available to test compatibility with upcoming changes to Lucene by updating the version at [version.properties](buildsrc/version.properties) with the `version-snapshot-sha` version.
+Example: `lucene = 10.0.0-snapshot-2e941fc`.
diff --git a/buildSrc/src/main/java/org/opensearch/gradle/RepositoriesSetupPlugin.java b/buildSrc/src/main/java/org/opensearch/gradle/RepositoriesSetupPlugin.java
index 30847f0648c..63b88f671c8 100644
--- a/buildSrc/src/main/java/org/opensearch/gradle/RepositoriesSetupPlugin.java
+++ b/buildSrc/src/main/java/org/opensearch/gradle/RepositoriesSetupPlugin.java
@@ -92,10 +92,9 @@ public class RepositoriesSetupPlugin implements Plugin<Project> {
                 throw new GradleException("Malformed lucene snapshot version: " + luceneVersion);
             }
             String revision = matcher.group(1);
-            // TODO(cleanup) - Setup own lucene snapshot repo
             MavenArtifactRepository luceneRepo = repos.maven(repo -> {
                 repo.setName("lucene-snapshots");
-                repo.setUrl("https://artifacts.opensearch.org/snapshots/lucene/");
+                repo.setUrl("https://d1nvenhzbhpy0q.cloudfront.net/snapshots/lucene/");
             });
             repos.exclusiveContent(exclusiveRepo -> {
                 exclusiveRepo.filter(