use std::process::Command;

use anyhow::{Context, anyhow, bail};

/// Spawn a subprocess with arguments.
///
/// Collects `stdout` and returns it on success.
/// Returns `Err` if the exit code isn't 0, or if the process failed to spawn.
pub fn cmd(cmd: &[&str]) -> anyhow::Result<String> {
    let [cmd, args @ ..] = cmd else {
        bail!("missing command");
    };

    let mut command = Command::new(cmd);
    command.args(args);
    println!("$ {command:?}");
    let output = command
        .output()
        .with_context(|| anyhow!("Failed to run {command:?}"))?;

    let stdout = String::from_utf8_lossy(&output.stdout);
    if !output.status.success() {
        let stderr = String::from_utf8_lossy(&output.stderr);
        eprintln!("{command:?} failed");
        eprintln!("stdout:\n{stdout}\n");
        eprintln!("stderr:\n{stderr}\n");
        bail!("{command:?} failed with exit code {}", output.status);
    }

    Ok(stdout.to_string())
}