Ryan is an engineer in the Sacramento Area with a focus in Python, Ruby, and Rust. Bash/Python Exercism mentor. Coding, physics, calculus, music, woodworking. Looking for work!
You're totally right, this is a good way to do it too. Thanks! Personally, I don't like set -u, because I like having blank variables, but I'm aware that maybe that makes me weird.
That being said, knowing about default and required parameter syntax is a really useful and important skill, and I'm definitely going to add it to my "Advanced Argument Handling" post. Thanks for bringing it up!
I am a Developer Advocate for Security in Mobile Apps and APIs at approov.io.
Another passion is the Elixir programming language that was designed to be concurrent, distributed and fault tolerant.
Location
Scotland
Education
Self teached Developer
Work
Developer Advocate for Mobile and API Security at approov.io
The -u flag have saved me a lot of bugs and can save you to delete the wrong path in your disk rm -rf ~/${UNSET_VAR} will be a disaster when used in some script.
If you like to have empty vars in your script then be explicit and initiate them with VAR="".
You're totally right, this is a good way to do it too. Thanks! Personally, I don't like
set -u, because I like having blank variables, but I'm aware that maybe that makes me weird.That being said, knowing about default and required parameter syntax is a really useful and important skill, and I'm definitely going to add it to my "Advanced Argument Handling" post. Thanks for bringing it up!
The
-uflag have saved me a lot of bugs and can save you to delete the wrong path in your diskrm -rf ~/${UNSET_VAR}will be a disaster when used in some script.If you like to have empty vars in your script then be explicit and initiate them with
VAR="".This reminds me of that time running Steam (the PC video game client) would delete everything your user could delete on Linux.
It ran this code:
Moving the Steam install location would cause
STEAMROOTto be blank...Let's hope you didn't run it as
root.