Tool to execute specified command on a set of files in parallel.

runner command jobs-dir [file-pattern]

is like

for job in jobs-dir/file-pattern; do
  command "$job"
done

but

• multiple jobs are processed in parallel (use + and - keyboard keys to set number of processes)
• failed jobs are retried
• the set of jobs is periodically refreshed
• runner can be safely restarted (state saved in jobs-dir/.command.log)

When the runner is running it shows:

• number of processes currently working and number of processes set
• number of jobs left to process and total number of jobs processed already
• estimated time to wait

E.g.:

12:10:48   running 19/19   jobs 3583/35700   eta 5h 52m 47s

Python 3