4 ms·
It sorta can't... note the use of eval.
by CraneWorm 7y ago
It sorta can't... note the use of eval.
- tzs 7y agoThe eval isn't to help with the nesting. The {} stuff nests just fine, as we can see by changing the "eval mv" to printf: $ printf '[%s]' file{,{.bak\;mv,.new},} [file][file.bak;mv][file.new][file] (Note: I took out the '\ ' from the original because I realized it is not necessary). The eval is there because in bash text expansion occurs after ';' is interpreted, and we need that to be the other way around. Hence, the escaping of ';' in the input to preserve it for text expansion, and then the eval afterward to get ';' interpreted.
- CraneWorm 7y agoSorry, I should have checked. I jumped at it because there are other things one might like to achieve with brace expansion but turn out to be impossible because it is evaluated first - you can't use them with variables.