GNU parallel bash fuction execution

gnu-parallel-bash-function-execution.sh

#!/bin/bash
#
# GNU Parallel and Bash functions: How to run the simple example from the manual - Stack Overflow 
# http://stackoverflow.com/questions/23814360/gnu-parallel-and-bash-functions-how-to-run-the-simple-example-from-the-manual
#
SCRIPT_DIR="$(cd $(dirname ${BASH_SOURCE:-$0}); pwd)"
WORKSPACE=${WORKSPACE:-$(pwd)}

log() { echo "[$(date +"%F %T")] $@"; }

doit () { 
  echo prams = $@ 
}
export -f doit

main() {

  log "executing parameters combination in prallel"
  params1=(1 2 3 4 5)
  params2=(a b c d e)
  parallel --dry-run --results ${WORKSPACE}/gnu-parallel-results --joblog ${WORKSPACE}/gnu-parallel-job.log -j2 --tag --line-buffer doit {1} {2} ::: ${params1[@]} ::: ${params2[@]}
  

  log "executing parameters combination in prallel"
  INPUT_FILE=${WORKSPACE}/input.tsv
  cat <<EOF > ${INPUT_FILE}
1	a
2	b
3	c
4	d
5	e
EOF
  parallel --results ${WORKSPACE}/gnu-parallel-results --joblog ${WORKSPACE}/gnu-parallel-job.log -a ${INPUT_FILE} --colsep '\t' -j2 --tag --line-buffer doit {1} {2}

}

main 
exit 0