if expressions

[shadichy]

https://tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html

[daniel-sc]

@shadichy basic "if" expressions are supported - could you provide an example for which it does not work (as expected)? Preferably together with the expected output :)

[shadichy]

@daniel-sc

Things that are not working (as my expectations):
-f file
-d dir
-z string
-eq, -le, -lt, -ge, -gt
! (equivalent to not)
[[ ]] expressions

and also mkdir -p