1 files changed, 38 insertions, 0 deletions
diff --git a/src/ci/scripts/verify-channel.sh b/src/ci/scripts/verify-channel.sh
new file mode 100755
index 000000000..cd28748a4
--- /dev/null
+++ b/src/ci/scripts/verify-channel.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+# We want to make sure all PRs are targeting the right branch when they're
+# opened, otherwise we risk (for example) to land a beta-specific change to the
+# master branch. This script ensures the branch of the PR matches the channel.
+
+set -euo pipefail
+IFS=$'\n\t'
+
+source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
+
+if isCiBranch auto || isCiBranch try || isCiBranch try-perf; then
+    echo "channel verification is only executed on PR builds"
+    exit
+fi
+
+channel=$(cat "$(ciCheckoutPath)/src/ci/channel")
+case "${channel}" in
+    nightly)
+        channel_branch="master"
+        ;;
+    beta)
+        channel_branch="beta"
+        ;;
+    stable)
+        channel_branch="stable"
+        ;;
+    *)
+        echo "error: unknown channel defined in src/ci/channel: ${channel}"
+        exit 1
+esac
+
+branch="$(ciBaseBranch)"
+if [[ "${branch}" != "${channel_branch}" ]]; then
+    echo "error: PRs changing the \`${channel}\` channel should be sent to the \
+\`${channel_branch}\` branch!"
+
+    exit 1
+fi