Method run_command

crates/test/src/lib.rs:1044–1077

Helper to execute an external process and generate a helpful error message on failure.

(&self, cmd: &mut Command)

    /// Helper to execute an external process and generate a helpful error
    /// message on failure.
    fn run_command(&self, cmd: &mut Command) -> Result<()> {
        if self.opts.inherit_stderr {
            cmd.stderr(Stdio::inherit());
        }
        let output = cmd
            .output()
            .with_context(|| format!("failed to spawn {cmd:?}"))?;
        if output.status.success() {
            return Ok(());
        }

        let mut error = format!(
            "\
command execution failed
command: {cmd:?}
status: {}",
            output.status,
        );

        if !output.stdout.is_empty() {
            error.push_str(&format!(
                "\nstdout:\n  {}",
                String::from_utf8_lossy(&output.stdout).replace("\n", "\n  ")
            ));
        }
        if !output.stderr.is_empty() {
            error.push_str(&format!(
                "\nstderr:\n  {}",
                String::from_utf8_lossy(&output.stderr).replace("\n", "\n  ")
            ));
        }

        bail!("{error}")
    }

    /// Converts the WASIp1 module at `p1` to a component using the information
    /// stored within `compile`.