Function is_command_installed

src/binary_installer/mod.rs:66–97

Check if the given command is installed and its version matches the expected version. Expects the command to support the `--version` flag and return a version string.

(command: &str, expected_version: Version)

///
/// Expects the command to support the `--version` flag and return a version string.
fn is_command_installed(command: &str, expected_version: Version) -> bool {
    let is_command_installed = Command::new("which")
        .arg(command)
        .output()
        .is_ok_and(|output| output.status.success());

    if !is_command_installed {
        debug!("{command} is not installed");
        return false;
    }

    let Ok(version_output) = Command::new(command).arg("--version").output() else {
        return false;
    };

    if !version_output.status.success() {
        debug!(
            "Failed to get command version. stderr: {}",
            String::from_utf8_lossy(&version_output.stderr)
        );
        return false;
    }

    let version_string = String::from_utf8_lossy(&version_output.stdout);
    let Ok(version) = versions::parse_from_output(&version_string) else {
        return false;
    };

    debug!("Found {command} version: {version}");

    versions::is_compatible(command, &version, &expected_version)
}