Move SyTest to Buildkite (#5459)

Including workers!

1 files changed, 33 insertions, 0 deletions

diff --git a/.buildkite/merge_base_branch.sh b/.buildkite/merge_base_branch.sh
new file mode 100755
index 0000000000..26176d6465
--- /dev/null
+++ b/.buildkite/merge_base_branch.sh
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -ex
+
+if [[ "$BUILDKITE_BRANCH" =~ ^(develop|master|dinsic|shhs|release-.*)$ ]]; then
+    echo "Not merging forward, as this is a release branch"
+    exit 0
+fi
+
+if [[ -z $BUILDKITE_PULL_REQUEST_BASE_BRANCH ]]; then
+    echo "Not a pull request, or hasn't had a PR opened yet..."
+
+    # It probably hasn't had a PR opened yet. Since all PRs land on develop, we
+    # can probably assume it's based on it and will be merged into it.
+    GITBASE="develop"
+else
+    # Get the reference, using the GitHub API
+    GITBASE=$BUILDKITE_PULL_REQUEST_BASE_BRANCH
+fi
+
+# Show what we are before
+git --no-pager show -s
+
+# Set up username so it can do a merge
+git config --global user.email bot@matrix.org
+git config --global user.name "A robot"
+
+# Fetch and merge. If it doesn't work, it will raise due to set -e.
+git fetch -u origin $GITBASE
+git merge --no-edit origin/$GITBASE
+
+# Show what we are after.
+git --no-pager show -s