Use of { try-list } always { always-list } with "set e-"

Use of { try-list } always { always-list } with "set e-"

[Zach Riggle]

Hello all!

I'm trying to use the "always" keyword to ensure that some cleanup
happens, even if an error occurs.

Perhaps I'm misunderstanding the intent of this feature, but it seems
that the always-list should be executed, even with "set -e".

===================
set -e
() {
    {
        echo TRY
        false
    } always {
        echo ALWAYS
    }
}
===================

I know that the always-list is executed if there's a "return" or
"exit" statement in the try-list, but I was hoping to be able to put
in some cleanup in the always-list in the event of an error.

Is there any way to achieve what I'm looking to do?

Zach Riggle

Re: Use of { try-list } always { always-list } with "set e-"

[Eric Cook]

On 7/17/21 9:03 AM, Zach Riggle wrote:
> set -e
> () {
>      {
>          echo TRY
>          false
>      } always {
>          echo ALWAYS
>      }
> }

set -e, as well meaning as the intention was, will always interactive with non posix features in weird ways.
it is pretty much always better to explicitly handle errors that need to abort the entire script instead of
relying on set -e. once you are writing conditional logic, if, while, {} always {}, etc, all bets are off on
how set -e will handle it.