Function install_decision

atomic-agent/src/integrations/install.rs:273–287

Decide what to do with a destination that may already exist.

(dst: &Path, previous: Option<&Receipt>, force: bool)

/// Decide what to do with a destination that may already exist.
fn install_decision(dst: &Path, previous: Option<&Receipt>, force: bool) -> AgentResult<Decision> {
    if !dst.exists() {
        return Ok(Decision::Install);
    }
    let recorded = previous.and_then(|r| r.recorded_hash(dst));
    match recorded {
        // Ours and untouched since install → safe to refresh.
        Some(hash) if hash == hash_file(dst)? => Ok(Decision::Refresh),
        // Ours but the user changed it → hands off unless forced.
        Some(_) if !force => Ok(Decision::Skip(SkipReason::UserModified)),
        // Not ours → hands off unless forced.
        None if !force => Ok(Decision::Skip(SkipReason::UserFile)),
        _ => Ok(Decision::Refresh),
    }
}

/// Expand a leading `~` in a destination path.
fn expand_dst(dst: &str) -> AgentResult<PathBuf> {