https://www.biostars.org/p/9574590/ Nextflow - How to pass the yml yaml format input file from an argument to channel as a list

main.nf

params.samples="NO_FILE"

workflow {
	ch = Channel.fromPath(params.samples).
		flatMap(F->{
				def yaml = new org.yaml.snakeyaml.Yaml();
				def map = yaml.load(F);
				return map.samples;
			});
	doIt(ch)
}

process doIt {
tag "${row.biosample_id} = ${row.bam}"
input:
	val(row)
script:
"""
echo "${row.biosample_id} = ${row.bam}"
"""
}

test.yaml

samples:
    -
        biosample_id: WGS001
        bam: WGS001.bam
    -
        biosample_id: WGS0002
        bam: NWGS0002.bam