Function walk_and_add

crates/openshell-bootstrap/src/build.rs:285–326

Recursively walk a directory and add entries to a tar archive, skipping paths that match `.dockerignore` patterns.

(
    root: &Path,
    current: &Path,
    ignore_patterns: &[IgnorePattern],
    builder: &mut tar::Builder<Vec<u8>>,
)

/// Recursively walk a directory and add entries to a tar archive,
/// skipping paths that match `.dockerignore` patterns.
fn walk_and_add(
    root: &Path,
    current: &Path,
    ignore_patterns: &[IgnorePattern],
    builder: &mut tar::Builder<Vec<u8>>,
) -> Result<()> {
    let entries = std::fs::read_dir(current)
        .into_diagnostic()
        .wrap_err_with(|| format!("failed to read directory: {}", current.display()))?;

    for entry in entries {
        let entry = entry
            .into_diagnostic()
            .wrap_err("failed to read directory entry")?;
        let path = entry.path();
        let relative = path
            .strip_prefix(root)
            .unwrap_or(&path)
            .to_string_lossy()
            .to_string();

        // Normalize to forward slashes for pattern matching.
        let relative_normalized = relative.replace('\\', "/");

        if is_ignored(&relative_normalized, path.is_dir(), ignore_patterns) {
            continue;
        }

        if path.is_dir() {
            walk_and_add(root, &path, ignore_patterns, builder)?;
        } else {
            // Use append_path_with_name which handles GNU LongName extensions
            // for paths exceeding 100 bytes (the POSIX tar name field limit).
            builder
                .append_path_with_name(&path, &relative_normalized)
                .into_diagnostic()
                .wrap_err_with(|| format!("failed to add file to tar: {relative_normalized}"))?;
        }
    }

    Ok(())
}

/// A parsed `.dockerignore` pattern.
#[derive(Debug, Clone)]