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114 lines
2.9 KiB
114 lines
2.9 KiB
//! Raw representation wrappers for libgit2
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use crate::branch::Branch;
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use git2::{self, Oid};
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use std::{fmt, sync::Arc};
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pub type GitResult<T> = Result<T, GitError>;
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/// The hex ID of a commit
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#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
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pub struct HashId(String);
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impl fmt::Display for HashId {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", self.0)
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}
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}
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impl HashId {
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pub fn to_oid(&self) -> Oid {
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self.clone().into()
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}
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pub fn to_string(&self) -> String {
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self.0.clone()
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}
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}
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impl From<Oid> for HashId {
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fn from(o: Oid) -> Self {
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Self(o.to_string())
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}
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}
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impl From<HashId> for Oid {
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fn from(hid: HashId) -> Self {
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Oid::from_str(hid.0.as_str()).expect(&format!(
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"Tried turning an invalid HashId variant into an Oid: {:?}",
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hid
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))
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}
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}
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impl<'any> From<&'any HashId> for Oid {
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fn from(hid: &'any HashId) -> Self {
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Oid::from_str(hid.0.as_str()).expect(&format!(
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"Tried turning an invalid HashId variant into an Oid: {:?}",
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hid
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))
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}
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}
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/// An error abstraction for raw git operations
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#[derive(Debug)]
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pub enum GitError {
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AllBad,
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}
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impl From<git2::Error> for GitError {
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fn from(_: git2::Error) -> Self {
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Self::AllBad
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}
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}
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/// Represents a git repository with lazy data loading
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#[derive(Clone)]
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pub struct Repository {
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inner: Arc<git2::Repository>,
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}
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impl Repository {
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/// Open a repository read-only at a specific path
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pub fn open(path: &str) -> GitResult<Self> {
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Ok(Self {
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inner: Arc::new(git2::Repository::open(path)?),
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})
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}
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/// Parse branch data from repository
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///
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/// If you only care about a single branch, you can also use the
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/// convenience function `get_branch()`.
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///
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/// ## Panics
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///
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/// This function can panic when branch metadata is missing.
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pub fn branches(&self) -> GitResult<Vec<Branch>> {
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Ok(self
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.inner
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.branches(None)?
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.into_iter()
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.filter_map(|e| e.ok())
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.map(|(branch, _)| {
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let name = branch.name().unwrap().unwrap().into();
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let head = branch.get().peel_to_commit().unwrap().id().into();
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Branch::new(&self.inner, name, head)
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})
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.collect())
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}
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/// Get a single branch by name
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///
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/// This function will enumerate all branches, and then select the
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/// desired one. If you want to make repeated queries onto the
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/// branch set, it's recommended you call `branches()`, and cache
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/// the data yourself.
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pub fn branch(&self, name: String) -> Option<Branch> {
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self.branches().ok().and_then(|ok| {
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ok.into_iter()
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.filter(|b| b.name().is_some())
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.find(|b| &b.name().unwrap() == &name)
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})
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}
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}
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