Hostlist

This is a Rust implementation of a hostlist library. Hostlists are a syntax for expressing multiple hosts, commonly used in HPC. E.g. compute[1-3] => compute1, compute2, compute3. However it goes a bit beyond what can be done with plain bash expansions of the type compute{1..3}.

Some other tools and applications supporting hostlists are

• Slurm
• pdsh
• genders
• GNU FreeIPMI

Usage

The library provides a single public function, with the signature

pub fn expand(a_str: &str) -> Result<Vec<String>, &'static str>

This function will expand a hostlist into a list of hostnames. E.g. "foo[1-3]" will result in a vector ["foo1", "foo2", "foo3"].

Command-line utility

A so far VERY rudimentary CLI app called hostlist is included, allowing to use the expand() function from the command line.