Bash. Variables inside aliases
January 31, 2018
Recently I had to use bash alias that contains
$(pwd) inside so I’ve defined it like that:
alias thename="something $(pwd) --option=value"
Of course I know a bit of bash so that’s why I use double quotes!
But it turned out to be wrong. Each time when my bash/zsh was opened the alias was defined with INTERPRETED
which is the directory where bash was opened (usualy home dir).
Actually we have to use single quotes to make sure that
$(pwd) isn’t interpreted at the moment of alias definition but it is
when we call the alias.
- use single quotes if you want to make sure variable/command is interpreted during the alias call.
- use double quotes if you only want to interpretate variable/command on the alias definition stage (and only once).