files-touched-check

#!/usr/bin/env bash
export LC_ALL=C
set -e -o pipefail
export TZ=UTC

git diff --no-commit-id --name-status -r "${1:-${CIRRUS_BASE_SHA}...HEAD}" \
    | {
    while read -r status name; do

       case "$name" in
           README.md) continue ;;
           .cirrus.yml) continue ;;
           contrib/*) continue ;;
       esac

       if [ "$status" != "A" ]; then
           echo "ERR: File status is not 'A' (for add): '$status'"
           exit 1
       fi

       if [[ $name =~ ^[^/]+/[^/]+/[^/]+.SHA256SUMS(|.asc)$ ]]; then
           if [ -z "$last_prefix" ]; then
               last_prefix="$(dirname "$name")"
               continue
           elif [ "$last_prefix" = "$(dirname "$name")" ]; then
               continue
           else
               echo "ERR: Added files need to be under the same prefix: '${last_prefix}'"
               exit 1
           fi
       else
           echo "ERR: Added unknown file '$name'"
           exit 1
       fi

    done
    }