Posts categorized under: Shell Coding

Mon 17 August 2020

Understanding "Local" Functions in Bash

I've been working a lot with Bash recently (because sadly a supercomputing center doesn't tend to offer Fish out the box). One issue that I've been running into when deploying complex scientific software oh HPC systems is that relative imports (via source) are really finicky. The "canonical" way to do …

Sun 29 December 2019

by Johannes Blaschke

in Shell Coding

Capturing `stderr` during Fish's Command Substitution

I've been working on extending Spack's fish-shell support, and I came across an unusual problem in fish: when I use a nested version of command substitution (ie. the braces-operator (cmd)), the outer command Substitution refused to capture stderr. This can be demonstrated using the (rather dumb) following example:

function cause_error …

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