alt Hacker NewsYou can target POSIX if you want to, but doing that doesn't guarantee shell scripts will work.
The blog post stresses this, the difference between POSIX and portability.
If you want portability, testing is better for now. One of the goals of these projects is to more precisely capture a retrospec (what actually works, not what was specified), it's the same thing they did with HTML5.
> but doing that doesn't guarantee shell scripts will work.
How so?
Can you give an example that should work according to the POSIX spec but doesn’t in a POSIX compliant shell?
The example in the post is just some behavior the POSIX spec doesn’t specify, so obviously you wouldn’t be allowed to do that when targeting POSIX.