This is a small utility for converting Slurm (and other batch system/etc) host
expressions (e.g host[120-150,999]) into their composite individual hosts. This
is often required when using information from e.g Slurm (such as the output from
sinfo) to do administrative things (like powering on a number of hosts using
ipmitool).
[you@box] $ shostspec host[1234-5678,8100]
host1234
host1235
host1236
...
host5678
host8100Provide the arguments on the command-line, you get out a newline-separated list with each individual host.
You can prefix the first entry in the range with zeros to set the width of the
output, e.g shostspec host[0001-1999] will create output like this:
host0001
host0002
...
host0010
...
...
host1999Pre-empting some questions/feature requests:
- If you need the output separated by spaces or commas or whatever, use something like xargs
- It takes arguments, not standard input, suitable for pasting (although standard input would be nice later, for big lists)
- There's no way to reverse the format, turning lists into minimal expressions, but that sounds like a fun algorithmic challenge (I'm not sure why it would be useful)
- Every host has to have a number range, because of the way that the parsing works, I
guess just
catanything else on the end? - You can't yet have more than one range in the expression (e.g
cpu[1-10]-[2-5]), but I don't think this would be too difficult to add (patches welcome) - Reversed ranges don't work, but I don't think Slurm or whatever would ever generate them anyway
- More test cases would be nice