Function download_with_curl

core/src/git.rs:340–375

Download a file using curl with retry.

(url: &str, path: &std::path::Path)

/// Download a file using curl with retry.
fn download_with_curl(url: &str, path: &std::path::Path) -> Result<()> {
    // Try curl first
    let output = Command::new("curl")
        .args([
            "-L",
            "--fail",
            "--retry",
            "3",
            "--retry-delay",
            "2",
            "-o",
            &path.display().to_string(),
            url,
        ])
        .output()?;

    if output.status.success() && path.exists() {
        return Ok(());
    }

    // Fallback: try wget
    let output = Command::new("wget")
        .args(["-O", &path.display().to_string(), url])
        .output()?;

    if output.status.success() && path.exists() {
        return Ok(());
    }

    Err(anyhow!(
        "Failed to download git from {}.\n\
        Please check your internet connection and try again.\n\
        Or download manually from https://git-scm.com",
        url
    ))
}

/// Walk directory recursively (simple implementation).
fn walkdir(dir: &Path) -> Vec<std::path::PathBuf> {