scripts: add merge_pr.sh

scripts/merge_pr.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+#
+# A helper to merge e.g. a PR from draft to an RC branch where any neccessary
+# conflicts resolutions are expected to have been trained with rerere.
+#
+# It merges PRs from "origin" remote which should be set to "[email protected]:anoma/namada.git".
+# Make sure to fetch latest before running with e.g. `git fetch origin`.
+#
+# Requires `gh` to be installed and authenticated.
+#
+# Usage example:
+# $ scripts/merge_pr.sh 2627 2db3acdb21581bb502b27dc9c1c831b4e94ad013 && \
+# $ scripts/merge_pr.sh 2698 0d3b252e7f5ceb85a276966fe8ee7d7e1c0c6e63 ce68d3a57eb342495a43dc65ee03394b116fd484 && \
+# $ scripts/merge_pr.sh 2819
+#
+# The first argument is a PR number, followed by any number of evil commit
+# hashes.
+
+set -Eo pipefail
+
+PR_NUM=$1
+
+BRANCH=$(gh pr view "$PR_NUM" --json headRefName -q .headRefName)
+echo "🔴 Merging branch $BRANCH https://github.com/anoma/namada/pull/$PR_NUM ..."
+
+# TODO: handle cross-repository PRs (and remote & fetch)
+IS_CROSS=$(gh pr view "$PR_NUM" --json isCrossRepository -q .isCrossRepository)
+if [ "$IS_CROSS" == "true" ]; then
+    echo "🪦 Cross-repository PR, manual intervention needed for PR #$PR_NUM"
+    exit 1
+fi
+
+# Merge the PR
+git merge --no-ff -m "Merge branch '$BRANCH' (#$PR_NUM)" origin/"$BRANCH"
+
+if [ $? -ne 0 ]; then
+    echo ""
+    echo "In rerere we trust 🙏"
+
+    git add wasm_for_tests/*.wasm 
+
+    git commit --no-edit
+
+    if [ $? -ne 0 ]; then
+        echo "🪦 Automatic resolution failed, manual intervention needed for PR #$PR_NUM"
+        exit 1
+    fi
+fi
+
+# Add evil commits
+for var in "${@:2}" # Skip the first arg (PR number)
+do
+    echo ""
+    echo "🙉 Adding evil $var..."
+    git cherry-pick --no-commit "$var"
+    git commit --amend --no-edit
+
+    if [ $? -ne 0 ]; then
+        echo "🪦 Evil commit failed to apply, manual intervention needed for PR #$PR_NUM"
+        exit 1
+    fi
+done
+
+echo ""
+echo ""