Add commit number of today to notification of GitHub Actions

Merged: https://github.com/ruby/ruby/pull/2675

tool/actions-commit-info.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+set -euo pipefail
+cd $(dirname "$0")/..
+set_env () {
+    echo "$1=$2"
+    echo "::set-env name=$1::$2"
+}
+COMMIT_TIMESTAMP="$(git log -1 --format=%ct)"
+set_env "COMMIT_TIMESTAMP" "$COMMIT_TIMESTAMP"
+LOGS=$(TZ=UTC git log --since='0:00' --date=iso-local --format='%cd %s')
+echo "commits of today:"
+echo "$LOGS"
+COUNT=$(echo "$LOGS" | wc -l)
+# strip spaces
+COUNT=$((0 + COUNT))
+set_env "COMMIT_NUMBER_OF_DAY" "$COUNT"
+set_env "COMMIT_DATE" "$(TZ=UTC git log --since='0:00' --date=short-local --format=%cd -1)"