Struct cradle::Stderr

pub struct Stderr(pub String);

See the CmdOutput implementation for Stderr below.

Trait Implementations

impl Debug for Stderr

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl CmdOutput for Stderr

Stderr allows to capture the stderr of a child process:

use cradle::*;

// (`Exit` is used here to suppress panics caused by `ls`
// terminating with a non-zero exit code.)
let (Stderr(stderr), Exit(_)) = cmd!(%"ls does-not-exist");
assert!(stderr.contains("No such file or directory"));

This assumes that the output written to stderr is encoded as utf-8, and will error otherwise.

By default, what is written to stderr by the child process is relayed to the parent’s stderr. However, when Stderr is used, this is switched off.