bvm 0.0.20

Proof of concept
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use dprint_cli_core::types::ErrBox;
use std::io::prelude::*;
use std::path::Path;

use crate::environment::Environment;
use tar::Archive;

pub async fn extract_tar_gz(
    message: &str,
    environment: &impl Environment,
    tar_gz_bytes: &[u8],
    dir_path: &Path,
) -> Result<(), ErrBox> {
    let tar_bytes = super::gz_decompress(&tar_gz_bytes)?;
    extract_tar(message, environment, &tar_bytes, dir_path).await
}

pub async fn extract_tar(
    message: &str,
    environment: &impl Environment,
    tar_bytes: &[u8],
    dir_path: &Path,
) -> Result<(), ErrBox> {
    let length = tar_bytes.len();

    environment
        .log_action_with_progress(
            message,
            move |update_size| -> Result<(), ErrBox> {
                let reader = std::io::Cursor::new(tar_bytes);
                let mut a = Archive::new(reader);
                let mut position = 0;
                for entry in a.entries()? {
                    let mut entry = entry?;
                    let file_path = dir_path.join(entry.path()?);
                    if environment.is_real() {
                        if cfg!(unix) {
                            entry.set_preserve_permissions(true);
                        }

                        entry.unpack_in(&dir_path)?;
                    } else {
                        let mut bytes = Vec::new();
                        entry.read_to_end(&mut bytes)?;
                        environment.write_file(&file_path, &bytes)?;
                    }
                    position += entry.size();
                    update_size(position as usize);
                }
                Ok(())
            },
            length,
        )
        .await?
}