How to disable playpen feature?

[killercup]

I'm currently writing a book on CLI applications in Rust (https://github.com/rust-lang-nursery/cli-wg/pull/47). Executing the code snippets in playpen will sadly not be very useful.

Is there a way to disable the playpen feature globally?

[mattico]

Apparently not! This should be easy to fix.

[badboy]

This should be covered by #744:

```rust,noplaypen
fn main(){
    println!("Don't run it.");
}
\```

[ehuss]

noplaypen needs documentation.

Also, @killercup, is that good enough?

[detly]

Could this be a global thing, set in book.toml? I had hoped that eg. [output.html.playground] would let me control it, but alas no.

[pineapplehunter]

I thought a global flag in book.toml would be nice as @detly said. So I tried implementing in a draft PR #1546. Would this help?

[adpaco-aws]

@pineapplehunter a global flag would be helpful. Does #1546 work? If it does, why not mark as ready for review?

[schungx]

Yes, I keep having to put no_run in all my code examples just to disable the playpen.

[pineapplehunter]

@adpaco-aws Thanks.
I'll check my code again and mark it as ready for review.

[ehuss]

Closing as resolved by #1546.