使用git2-rs库克隆指定的单个分支的内容

git.rs

use git2::build::RepoBuilder;
use git2::{Cred, FetchOptions, RemoteCallbacks};
use std::path::{Path, PathBuf};

#[derive(Debug)]
pub struct SshKey {
    pub public_key: PathBuf,
    pub private_key: PathBuf,
}

pub fn single_git_clone(git_url: &str, git_path: &Path, git_branch: &str, ssh_key: &SshKey) -> Result<(), git2::Error> {
    let mut cb = RemoteCallbacks::new();
    cb.transfer_progress(|stats| {
        let network_pct = (100 * stats.received_objects()) / stats.total_objects();
        println!("[git clone] {network_pct}% {}/{}", stats.received_objects(), stats.total_objects());
        true
    });
    cb.credentials(|_, username, _| Cred::ssh_key(username.unwrap_or("git"), Some(&ssh_key.public_key), &ssh_key.private_key, None));

    let mut fo = FetchOptions::new();
    fo.remote_callbacks(cb);
    RepoBuilder::new()
        .branch(git_branch) // 指定分支
        .fetch_options(fo)
        .remote_create(|repo, name, url| { // 只克隆指定的分支 --single-branch
            let refspec = format!("+refs/heads/{0:}:refs/remotes/origin/{0:}", &git_branch);
            repo.remote_with_fetch(name, url, &refspec)
        })
        .clone(git_url, git_path)?;

    Ok(())
}

main.rs

mod git;

use std::path::{Path, PathBuf};
use create::git::{single_git_clone, SshKey};


fn main() {
    let ssh_key = SshKey {
        public_key: PathBuf::from("./git_ssh_key/user_rsa.pub"),
        private_key: PathBuf::from("./git_ssh_key/user_rsa"),
    };
    let local_path = Path::new("./test");
    match single_git_clone("git@github.com:a/b.git", &local_path, "release/1.2.3", &ssh_key) {
        Ok(()) => {}
        Err(e) => println!("error: {}", e),
    }
}

}