Simple YAML fine validation for syntax

test_config.sh

#! /bin/bash

file=$1
set -a

if [ -z "$file" ]; then
    echo "need YAML file as first arg"
    exit 2
fi
if [ -f $file ]; then
    YAML_FILE=$file
    perl -MData::Dumper -MYAML -e '$h = YAML::LoadFile($ENV{YAML_FILE}); print Dumper $h' && echo OK || echo Failed
else
    echo $file: no such file or directory
    exit 1
fi