1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154

pub use git2;
use git2::build::RepoBuilder;
use git2::{Cred, Direction, IndexAddOption, Oid, RemoteCallbacks};
use std::path::Path;

#[derive(Debug)]
pub struct GitHubRepository {
    pub owner: String,
    pub name: String,
}

impl GitHubRepository {
    pub fn clone<F>(
        &self,
        dir: impl AsRef<Path>,
        credential: Option<F>,
    ) -> Result<LocalRepository, git2::Error>
    where
        F: Fn() -> Result<Cred, git2::Error>,
    {
        let mut callbacks = RemoteCallbacks::new();
        if let Some(credential) = credential {
            callbacks.credentials(move |_url, _username_from_url, _allowed_types| credential());
        }
        let mut fetch_option = git2::FetchOptions::new();
        fetch_option.remote_callbacks(callbacks);
        let repo = RepoBuilder::new().fetch_options(fetch_option).clone(
            &format!("https://github.com/{}/{}", self.owner, self.name),
            dir.as_ref(),
        )?;
        Ok(LocalRepository { inner: repo })
    }
}

pub struct LocalRepository {
    pub inner: git2::Repository,
}

impl LocalRepository {
    pub fn pull<F>(&mut self, branch_name: &str, credential: Option<F>) -> Result<(), git2::Error>
    where
        F: Fn() -> Result<Cred, git2::Error>,
    {
        let mut callbacks = RemoteCallbacks::new();
        if let Some(credential) = credential {
            callbacks.credentials(move |_url, _username_from_url, _allowed_types| credential());
        }
        let mut fetch_option = git2::FetchOptions::new();
        fetch_option.remote_callbacks(callbacks);
        self.inner
            .find_remote("origin")?
            .fetch(&[branch_name], Some(&mut fetch_option), None)?;
        let fetch_head = self.inner.find_reference("FETCH_HEAD")?.peel_to_commit()?;
        self.inner.branch(branch_name, &fetch_head, false).unwrap();
        self.inner
            .set_head(&format!("refs/heads/{}", branch_name))?;
        self.inner.checkout_head(None)?;
        self.inner
            .reset(fetch_head.as_object(), git2::ResetType::Hard, None)?;
        Ok(())
    }

    pub fn add_all(&mut self) -> Result<git2::Oid, git2::Error> {
        let mut index = self.inner.index()?;
        index.add_all(["*"].iter(), IndexAddOption::DEFAULT, None)?;
        index.write_tree()
    }

    pub fn commit(
        &mut self,
        tree_id: Oid,
        message: &str,
        signature: git2::Signature,
    ) -> Result<(), git2::Error> {
        let parent_commit = self.inner.head().unwrap().peel_to_commit().unwrap();
        let tree = self.inner.find_tree(tree_id).unwrap();
        self.inner.commit(
            Some("HEAD"),
            &signature,
            &signature,
            message,
            &tree,
            &[&parent_commit],
        )?;
        Ok(())
    }

    pub fn push<F>(&mut self, credential: F, branch_name: &str) -> Result<(), git2::Error>
    where
        F: Fn() -> Result<Cred, git2::Error>,
    {
        let mut callbacks = RemoteCallbacks::new();
        callbacks.credentials(|_url, _username_from_url, _allowed_types| credential());
        let mut push_option = git2::PushOptions::new();
        push_option.remote_callbacks(callbacks);
        let mut remote = self.inner.find_remote("origin")?;
        let mut callbacks = RemoteCallbacks::new();
        callbacks.credentials(|_url, _username_from_url, _allowed_types| credential());
        remote.connect_auth(Direction::Push, Some(callbacks), None)?;
        remote.push(
            &[format!("HEAD:refs/heads/{}", branch_name)],
            Some(&mut push_option),
        )
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use git2::Signature;
    use std::fs::File;
    use std::io::Write;

    #[test]
    fn fuck() {
        std::fs::remove_dir_all("./lab2").unwrap();
        let github_repo = GitHubRepository {
            owner: "longfangsong".to_string(),
            name: "lab2".to_string(),
        };
        let mut repo = github_repo
            .clone(
                "./lab2",
                Some(|| {
                    Cred::userpass_plaintext(
                        "baipiao-bot",
                        "07b497cd5e083fe53080f8b5eccdd588e3286c5a",
                    )
                }),
            )
            .unwrap();

        repo.pull(
            "patch-1",
            Some(|| {
                Cred::userpass_plaintext("baipiao-bot", "07b497cd5e083fe53080f8b5eccdd588e3286c5a")
            }),
        )
        .unwrap();

        let mut f = File::create("./lab2/new4.txt").unwrap();
        f.write_all("hello".as_bytes()).unwrap();
        drop(f);

        let tree_id = repo.add_all().unwrap();

        let signature = Signature::now("baipiao-bot", "moss_the_bot@163.com").unwrap();
        repo.commit(tree_id, "test", signature).unwrap();
        repo.push(
            || Cred::userpass_plaintext("baipiao-bot", "07b497cd5e083fe53080f8b5eccdd588e3286c5a"),
            "patch-1",
        );
    }
}