if
if
TLDR
Echo a different thing depending on a command's success
>_ [command] && echo "success" || echo "failure"
Full if syntax
>_ if [condition]; then echo "true"; else echo "false"; fi
List available if conditions
>_ help test
Test if a given variable is empty
>_ if [[ -z $GIT_BRANCH ]]; then echo "true"; else echo "false"; fi
Test if a file exists
>_ if [[ -e [filename] ]]; then echo "true"; else echo "false"; fi
If directory not exists
>_ if [[ ! -d [path/to/directory] ]]; then echo "true"; else echo "false"; fi
