src/tools/rustfmt/check_diff/src/lib.rs

use std::env;
use std::io;
use std::path::Path;
use std::process::Command;
use tracing::info;

pub enum GitError {
    FailedClone { stdout: Vec<u8>, stderr: Vec<u8> },
    IO(std::io::Error),
}

impl From<io::Error> for GitError {
    fn from(error: io::Error) -> Self {
        GitError::IO(error)
    }
}

/// Clone a git repository
///
/// Parameters:
/// url: git clone url
/// dest: directory where the repo should be cloned
pub fn clone_git_repo(url: &str, dest: &Path) -> Result<(), GitError> {
    let git_cmd = Command::new("git")
        .env("GIT_TERMINAL_PROMPT", "0")
        .args([
            "clone",
            "--quiet",
            url,
            "--depth",
            "1",
            dest.to_str().unwrap(),
        ])
        .output()?;

    // if the git command does not return successfully,
    // any command on the repo will fail. So fail fast.
    if !git_cmd.status.success() {
        let error = GitError::FailedClone {
            stdout: git_cmd.stdout,
            stderr: git_cmd.stderr,
        };
        return Err(error);
    }

    info!("Successfully clone repository.");
    return Ok(());
}

pub fn change_directory_to_path(dest: &Path) -> io::Result<()> {
    let dest_path = Path::new(&dest);
    env::set_current_dir(&dest_path)?;
    info!(
        "Current directory: {}",
        env::current_dir().unwrap().display()
    );
    return Ok(());
}