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// Copyright (c) 2020 Teddy Wing
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
use std::str::FromStr;
use git2::Repository;
use thiserror::Error;
use url;
use url::Url;
/// Errors getting an `OwnerRepo` from a remote in a Git repository.
#[derive(Debug, Error)]
pub enum Error {
#[error(transparent)]
Git(#[from] git2::Error),
#[error(transparent)]
OwnerRepo(#[from] OwnerRepoError),
#[error("Unable to find remote '{0}'")]
NoRemote(String),
}
/// Errors parsing an `OwnerRepo`.
#[derive(Debug, Error)]
pub enum OwnerRepoError {
#[error("Unable to parse URL")]
Url(#[from] url::ParseError),
#[error("URL has no path")]
NoPath,
#[error("Unable to parse owner or repo")]
NoOwnerRepo,
}
#[derive(Debug)]
pub struct OwnerRepo {
pub owner: String,
pub repo: String,
}
/// Parse an owner-repo pair from a Git remote. Can be either an HTTP URL
/// (`https://github.com/teddywing/github-suggestion.git`) or an SSH-style
/// reference (`git@github.com:teddywing/github-suggestion.git`).
impl FromStr for OwnerRepo {
type Err = OwnerRepoError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let url = match Url::parse(s) {
Err(url::ParseError::RelativeUrlWithoutBase) =>
return OwnerRepo::from_ssh(s),
r => r,
}?;
let path = url.path_segments()
.ok_or(OwnerRepoError::NoPath)?
.collect::<Vec<_>>();
if path.len() < 2 {
return Err(OwnerRepoError::NoOwnerRepo);
}
let repo = path[1]
.strip_suffix(".git")
.unwrap_or(path[1]);
Ok(OwnerRepo {
owner: path[0].to_owned(),
repo: repo.to_owned(),
})
}
}
impl OwnerRepo {
/// Parse an `OwnerRepo` from the URL for `remote_name` in the current
/// repository.
pub fn from_remote(
remote_name: Option<&str>,
) -> Result<OwnerRepo, Error> {
let repo = Repository::open(".")?;
let remote_name = match remote_name {
Some(r) => r,
None => "origin",
};
let remote = repo.find_remote(remote_name)?;
let url = remote.url()
.ok_or_else(|| Error::NoRemote(remote_name.to_owned()))?;
Ok(url.parse()?)
}
/// Parse an `OwnerRepo` from an SSH-style reference
/// (`git@github.com:teddywing/github-suggestion.git`).
pub fn from_ssh(ssh: &str) -> Result<Self, OwnerRepoError> {
let address_path: Vec<_> = ssh.splitn(2, ':').collect();
let path = address_path.get(1)
.ok_or(OwnerRepoError::NoOwnerRepo)?;
let path = path
.strip_suffix(".git")
.unwrap_or(path);
let segments: Vec<_> = path.split('/').collect();
if segments.len() < 2 {
return Err(OwnerRepoError::NoOwnerRepo);
}
Ok(OwnerRepo {
owner: segments[0].to_owned(),
repo: segments[1].to_owned(),
})
}
}
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