status

#!/bin/bash
#
# with no argument, print a status of all jobs:
# each line will be job ID, (Pending, Running, Finished), and the command
#
# with an argument, print the log for the job with that id

OUTPUT_LOCATION=~/output/
JOB_LIST=${OUTPUT_LOCATION}/job_list

is_int () { 
    test "$@" -eq "$@" 2> /dev/null;
}

job_status() {
    # job ID is the argument
    if [ -f "${OUTPUT_LOCATION}/${1}_finished" ]; then
      echo "finished"
    elif [ -f "${OUTPUT_LOCATION}/${1}_out" ]; then
      echo "running"
    else
      echo "pending"
    fi
}

# print the log for the specified job
if [ $# -gt 0 ]; then
    if ! is_int "${1}"; then
        echo "ERROR: job id must be an integer" >&2
        exit 1
    fi
    if [[ $(job_status $1) == "pending" ]]; then
        echo "Job logs not available for $1" >&2
        exit 0
    fi
    cat "${OUTPUT_LOCATION}/${1}_out"
    exit 0
else
# otherwise print a table of the jobs
job_id=0
while IFS= read -r line; do
  printf '%s\t%s\t%s\n' "$job_id" "$(job_status $job_id)" "${line}"
  job_id=$( expr $job_id + 1 )
done < "${JOB_LIST}"
fi