build: add script to merge dependabot PRs

scripts/merge-dependabot-mrs.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# set -x # TO REMOVE
+
+set -euo pipefail
+
+request_approval_to_continue() {
+    echo
+    echo $1
+    echo
+    echo 'Continue with PR approval and merge? Only "yes" will be accepted to approve.'
+    read CONTINUE
+    [ "$CONTINUE" == "yes" ] || exit 0
+}
+
+show_help () {
+    echo Usage: $0
+    echo
+    echo Iterate over open and mergeable dependabot PRs to approve and merge them.
+    exit 0
+}
+
+# Show help if needed
+([ "${1:-}" == "-h" ] || [ "${1:-}" == "--help" ]) && show_help
+
+# Ensure we are on master branch
+[ "$(git rev-parse --abbrev-ref HEAD)" == "master" ] || (echo ERROR: not on "master" branch, aborting. ; exit 1)
+
+while true ; do
+    gh pr list --state open --label dependencies --json title,mergeable,number,updatedAt
+    GH_PR=$(gh pr list --state open --label dependencies --json title,mergeable,number,updatedAt | jq -r '.[] | select(.mergeable == "MERGEABLE") | .number' | sort -n | head -n 1); echo PR \#$GH_PR ; gh pr diff $GH_PR || break
+
+    request_approval_to_continue "Please review above diff."
+    gh pr review $GH_PR --approve
+    gh pr merge $GH_PR --merge --delete-branch
+done
+
+# Pull from github
+git pull