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use crate::commit::models::Commit;
use chrono::{DateTime, Local};
use git2::{BranchType, Error, Repository, Time};
use std::fs::remove_dir_all;
/// Return the temporary folder of the git repository
fn get_tmp_dir(repo_name: &String) -> String {
format!("/tmp/{}", &repo_name)
}
/// Clone a repository `repo` in a temporary folder. It uses only GitHub at
/// this moment.
pub fn clone_repo(repo_name: &String) -> Result<Repository, Error> {
let url: &str =
&format!("https://github.com/{}", &repo_name).to_owned()[..];
let tmp_dir: String = get_tmp_dir(&repo_name);
let cloned = Repository::clone(url, tmp_dir)?;
Ok(cloned)
}
/// Check if a `branch` exists inside the repository and then set the head of
/// `repo` to that branch
pub fn get_branch(repo: &Repository, branch: &str) -> Result<(), Error> {
if let Err(e) = repo.find_branch(&branch, BranchType::Local) {
return Err(e);
}
repo.set_head(&format!("refs/heads/{}", branch).to_owned()[..])
}
/// Get a `git2::Commit` and returns a date in RFC2822 format
pub fn get_date(commit: &git2::Commit) -> String {
let t: Time = commit.time();
let (offset, sign) = match t.offset_minutes() {
n if n < 0 => (-n, '-'),
n => (n, '+'),
};
let (hours, minutes) = (offset / 60, offset % 60);
let ts =
time::Timespec::new(t.seconds() + (t.offset_minutes() as i64) * 60, 0);
let time = time::at(ts);
let result = format!(
"{} {}{:02}{:02}",
time.strftime("%a, %e %b %Y %T").unwrap(),
sign,
hours,
minutes
);
result
}
/// Get a `git2::Commit` and returns a valid `Commit` to upload to the database
fn get_commit(gcommit: &git2::Commit, repo_name: &String) -> Commit {
let hash = gcommit.id().to_string();
let tree = match gcommit.parent_id(0) {
Ok(parent) => Some(parent.to_string()),
Err(_) => None,
};
let mut text = "".to_string();
for line in String::from_utf8_lossy(gcommit.message_bytes()).lines() {
text += line;
text += "\n";
}
// Remove the last "\n"
let _ = text.pop();
let date: DateTime<Local> =
match DateTime::parse_from_rfc2822(&get_date(&gcommit)) {
Ok(date) => date.into(),
Err(e) => {
// This is a real problem!
// TODO: manage this error
panic!(e)
}
};
let author_email = gcommit.author().email().unwrap().to_string();
let author_name = gcommit.author().name().unwrap().to_string();
let committer_email = gcommit.committer().email().unwrap().to_string();
let committer_name = gcommit.committer().name().unwrap().to_string();
Commit {
hash,
tree,
text,
date,
author_email,
author_name,
committer_email,
committer_name,
repository_url: repo_name.clone(),
}
}
/// Get all commits from a Git repository. Returns an array of `Commit`.
/// First, clone the repo into a temporary folder.
/// Then, open the repository.
/// Then, get commits
/// Finally, remove the temporary folder
pub fn repo_commits(
repo_name: &String,
branch: &String,
) -> Result<Vec<Commit>, Error> {
// Remove a possible already cloned repository
let _ = remove_dir_all(get_tmp_dir(&repo_name));
// Try to clone the repo. If it returns an error, it's useless to go ahead:
// raises an error.
let repo = match clone_repo(&repo_name) {
Ok(r) => r,
Err(e) => {
return Err(e);
}
};
if let Err(e) = get_branch(&repo, branch) {
return Err(e);
}
let mut revwalk = repo.revwalk()?;
let head = repo.head().unwrap().target().unwrap();
if let Err(e) = revwalk.push(head) {
return Err(e);
}
let mut commits: Vec<Commit> = vec![];
for commit in revwalk {
let hash = repo.find_commit(commit?)?;
commits.push(get_commit(&hash, &repo_name));
}
// Remove the cloned repository folder
let _ = remove_dir_all(get_tmp_dir(&repo_name));
Ok(commits)
}
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