buildkite(dra): support list for feature branches (#13139)

.buildkite/scripts/dra.sh

@@ -5,7 +5,7 @@
 ##
 ##  It downloads the generated artifacts and run the DRA only if the branch is an active
 ##  branch, based on the Unified Release policy. Otherwise, it won't run the DRA but print
-##  some traces.
+##  some traces and fail unless it's a feature branch then it will list the DRA artifacts.
 ##
 
 set -eo pipefail
@@ -28,6 +28,10 @@ if [[ "${BUILDKITE_PULL_REQUEST:-false}" == "true" ]]; then
   exit 0
 fi
 
+# by default it uses the buildkite branch
+DRA_BRANCH="$BUILDKITE_BRANCH"
+# by default it publishes the DRA artifacts, for such it uses the collect command.
+dra_command=collect
 BRANCHES_URL=https://storage.googleapis.com/artifacts-api/snapshots/branches.json
 curl -s "${BRANCHES_URL}" > active-branches.json
 if ! grep -q "\"$BUILDKITE_BRANCH\"" active-branches.json ; then
@@ -37,30 +41,51 @@ if ! grep -q "\"$BUILDKITE_BRANCH\"" active-branches.json ; then
   echo "VERSION=$VERSION"
   echo "Supported branches:"
   cat active-branches.json
-  buildkite-agent annotate "${BUILDKITE_BRANCH} is not supported yet. Look for the supported branches in ${BRANCHES_URL}" --style 'warning' --context 'ctx-warn'
-  exit 1
+  if [[ $BUILDKITE_BRANCH =~ "feature/" ]]; then
+    buildkite-agent annotate "${BUILDKITE_BRANCH} will list DRA artifacts. Feature branches are not supported. Look for the supported branches in ${BRANCHES_URL}" --style 'info' --context 'ctx-info'
+    dra_command=list
+
+    # use a different branch since DRA does not support feature branches but main/release branches
+    # for such we will use the VERSION and https://storage.googleapis.com/artifacts-api/snapshots/<major.minor>.json
+    # to know if the branch was branched out from main or the release branches.
+    MAJOR_MINOR=${VERSION%.*}
+    if curl -s "https://storage.googleapis.com/artifacts-api/snapshots/main.json" | grep -q "$VERSION" ; then
+      DRA_BRANCH=main
+    else
+      if curl -s "https://storage.googleapis.com/artifacts-api/snapshots/$MAJOR_MINOR.json" | grep -q "$VERSION" ; then
+        DRA_BRANCH="$MAJOR_MINOR"
+      else
+        buildkite-agent annotate "It was not possible to know the original base branch for ${BUILDKITE_BRANCH}. This won't fail - this is a feature branch." --style 'info' --context 'ctx-info-feature-branch'
+        exit 0
+      fi
+    fi
+  else
+    buildkite-agent annotate "${BUILDKITE_BRANCH} is not supported yet. Look for the supported branches in ${BRANCHES_URL}" --style 'warning' --context 'ctx-warn'
+    exit 1
+  fi
 fi
 
 dra() {
   local workflow=$1
-  echo "--- Run release manager $workflow"
+  local command=$2
+  echo "--- Run release manager $workflow (DRA command: $command)"
   docker run --rm \
     --name release-manager \
     -e VAULT_ADDR="${VAULT_ADDR_SECRET}" \
     -e VAULT_ROLE_ID="${VAULT_ROLE_ID_SECRET}" \
     -e VAULT_SECRET_ID="${VAULT_SECRET}" \
     --mount type=bind,readonly=false,src=$(pwd),target=/artifacts \
     docker.elastic.co/infra/release-manager:latest \
-      cli collect \
+      cli "$command" \
       --project apm-server \
-      --branch $BUILDKITE_BRANCH \
+      --branch $DRA_BRANCH \
       --commit $BUILDKITE_COMMIT \
       --workflow $workflow \
       --artifact-set main \
       --version $VERSION
 }
 
-dra "snapshot"
-if [[ "${BUILDKITE_BRANCH}" != "main" ]]; then
-  dra "staging"
+dra "snapshot" "$dra_command"
+if [[ "${DRA_BRANCH}" != "main" ]]; then
+  dra "staging" "$dra_command"
 fi