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use crate::{
diff::*,
file_system,
vcs,
vcs::{
git::{
error::*,
reference::{glob::RefGlob, Ref, Rev},
Branch,
Commit,
Namespace,
RefScope,
Signature,
Tag,
},
Vcs,
},
};
use git2::Oid;
use nonempty::NonEmpty;
use std::{collections::HashSet, convert::TryFrom, str};
pub(super) enum CommitHistory {
Full,
Last,
}
pub type History = vcs::History<Commit>;
pub struct Repository(pub(super) git2::Repository);
pub struct RepositoryRef<'a> {
pub(super) repo_ref: &'a git2::Repository,
}
unsafe impl<'a> Send for RepositoryRef<'a> {}
impl<'a> From<&'a git2::Repository> for RepositoryRef<'a> {
fn from(repo_ref: &'a git2::Repository) -> Self {
RepositoryRef { repo_ref }
}
}
impl<'a> RepositoryRef<'a> {
pub fn which_namespace(&self) -> Result<Option<Namespace>, Error> {
self.repo_ref
.namespace_bytes()
.map(Namespace::try_from)
.transpose()
}
pub fn list_branches(&self, scope: RefScope) -> Result<Vec<Branch>, Error> {
RefGlob::branch(scope)
.references(self)?
.iter()
.try_fold(vec![], |mut acc, reference| {
let branch = Branch::try_from(reference?)?;
acc.push(branch);
Ok(acc)
})
}
pub fn list_tags(&self, scope: RefScope) -> Result<Vec<Tag>, Error> {
RefGlob::tag(scope)
.references(self)?
.iter()
.try_fold(vec![], |mut acc, reference| {
let tag = Tag::try_from(reference?)?;
acc.push(tag);
Ok(acc)
})
}
pub fn list_namespaces(&self) -> Result<Vec<Namespace>, Error> {
let namespaces: Result<HashSet<Namespace>, Error> = RefGlob::Namespace
.references(self)?
.iter()
.try_fold(HashSet::new(), |mut acc, reference| {
let namespace = Namespace::try_from(reference?)?;
acc.insert(namespace);
Ok(acc)
});
Ok(namespaces?.into_iter().collect())
}
pub(super) fn reference<R, P>(&self, reference: R, check: P) -> Result<History, Error>
where
R: Into<Ref>,
P: FnOnce(&git2::Reference) -> Option<Error>,
{
let reference = match self.which_namespace()? {
None => reference.into(),
Some(namespace) => reference.into().namespaced(namespace),
}
.find_ref(self)?;
if let Some(err) = check(&reference) {
return Err(err);
}
self.to_history(&reference)
}
pub fn diff(&self, from: Oid, to: Oid) -> Result<Diff, Error> {
self.diff_commits(None, Some(from), to)
.and_then(|diff| Diff::try_from(diff).map_err(Error::from))
}
pub fn initial_diff(&self, oid: Oid) -> Result<Diff, Error> {
self.diff_commits(None, None, oid)
.and_then(|diff| Diff::try_from(diff).map_err(Error::from))
}
pub fn oid(&self, oid: &str) -> Result<Oid, Error> {
Ok(self.repo_ref.revparse_single(oid)?.id())
}
pub(super) fn rev_to_commit(&self, rev: &Rev) -> Result<git2::Commit, Error> {
match rev {
Rev::Oid(oid) => Ok(self.repo_ref.find_commit(*oid)?),
Rev::Ref(reference) => Ok(reference.find_ref(self)?.peel_to_commit()?),
}
}
pub(super) fn switch_namespace(&self, namespace: &str) -> Result<(), Error> {
Ok(self.repo_ref.set_namespace(namespace)?)
}
pub(super) fn get_commit(&self, oid: Oid) -> Result<git2::Commit<'a>, Error> {
let commit = self.repo_ref.find_commit(oid)?;
Ok(commit)
}
pub(super) fn head(&self) -> Result<History, Error> {
let head = self.repo_ref.head()?;
self.to_history(&head)
}
pub(super) fn to_history(&self, history: &git2::Reference<'a>) -> Result<History, Error> {
let head = history.peel_to_commit()?;
self.commit_to_history(head)
}
pub(super) fn commit_to_history(&self, head: git2::Commit) -> Result<History, Error> {
let head_id = head.id();
let mut commits = NonEmpty::new(Commit::try_from(head)?);
let mut revwalk = self.repo_ref.revwalk()?;
revwalk.push(head_id)?;
for commit_result_id in revwalk {
let commit_id: Oid = commit_result_id?;
if commit_id == head_id {
continue;
}
let commit = Commit::try_from(self.repo_ref.find_commit(commit_id)?)?;
commits.push(commit);
}
Ok(vcs::History(commits))
}
pub(super) fn extract_signature(
&self,
commit_oid: &Oid,
field: Option<&str>,
) -> Result<Option<Signature>, Error> {
match self.repo_ref.extract_signature(commit_oid, field) {
Err(error) => {
if error.code() == git2::ErrorCode::NotFound {
Ok(None)
} else {
Err(error.into())
}
},
Ok(sig) => Ok(Some(Signature::from(sig.0))),
}
}
pub(crate) fn revision_branches(&self, oid: &Oid) -> Result<Vec<Branch>, Error> {
let local = RefGlob::LocalBranch.references(self)?;
let remote = RefGlob::RemoteBranch { remote: None }.references(self)?;
let mut references = local.iter().chain(remote.iter());
let mut contained_branches = vec![];
references.try_for_each(|reference| {
let reference = reference?;
self.reachable_from(&reference, oid).and_then(|contains| {
if contains {
let branch = Branch::try_from(reference)?;
contained_branches.push(branch);
}
Ok(())
})
})?;
Ok(contained_branches)
}
fn reachable_from(&self, reference: &git2::Reference, oid: &Oid) -> Result<bool, Error> {
let other = reference.peel_to_commit()?.id();
let is_descendant = self.repo_ref.graph_descendant_of(other, *oid)?;
Ok(other == *oid || is_descendant)
}
pub(super) fn file_history(
&self,
path: &file_system::Path,
commit_history: CommitHistory,
commit: Commit,
) -> Result<Vec<Commit>, Error> {
let mut revwalk = self.repo_ref.revwalk()?;
let mut commits = vec![];
revwalk.push(commit.id)?;
for commit in revwalk {
let parent_id: Oid = commit?;
let parent = self.repo_ref.find_commit(parent_id)?;
let paths = self.diff_commit_and_parents(path, &parent)?;
if let Some(_path) = paths {
commits.push(Commit::try_from(parent)?);
match &commit_history {
CommitHistory::Last => break,
CommitHistory::Full => {},
}
}
}
Ok(commits)
}
fn diff_commit_and_parents(
&self,
path: &file_system::Path,
commit: &git2::Commit,
) -> Result<Option<file_system::Path>, Error> {
let mut parents = commit.parents();
let parent = parents.next().map(|c| c.id());
let diff = self.diff_commits(Some(path), parent, commit.id())?;
if let Some(_delta) = diff.deltas().next() {
Ok(Some(path.clone()))
} else {
Ok(None)
}
}
fn diff_commits(
&self,
path: Option<&file_system::Path>,
from: Option<Oid>,
to: Oid,
) -> Result<git2::Diff, Error> {
let new_tree = self.repo_ref.find_commit(to)?.tree()?;
let old_tree = from.map_or(Ok(None), |oid| {
self.repo_ref.find_commit(oid)?.tree().map(Some)
})?;
let mut opts = git2::DiffOptions::new();
if let Some(path) = path {
opts.pathspec(path);
opts.skip_binary_check(true);
}
let diff =
self.repo_ref
.diff_tree_to_tree(old_tree.as_ref(), Some(&new_tree), Some(&mut opts))?;
Ok(diff)
}
}
impl<'a> Vcs<Commit, Error> for RepositoryRef<'a> {
type HistoryId = Rev;
type ArtefactId = Oid;
fn get_history(&self, history_id: Self::HistoryId) -> Result<History, Error> {
match history_id {
Rev::Ref(reference) => self.reference(reference, |_| None),
Rev::Oid(oid) => {
let commit = self.get_commit(oid)?;
self.commit_to_history(commit)
},
}
}
fn get_histories(&self) -> Result<Vec<History>, Error> {
self.repo_ref
.references()
.map_err(Error::from)
.and_then(|mut references| {
references.try_fold(vec![], |mut acc, reference| {
reference.map_err(Error::from).and_then(|r| {
let history = self.to_history(&r)?;
acc.push(history);
Ok(acc)
})
})
})
}
fn get_identifier(artifact: &Commit) -> Self::ArtefactId {
artifact.id
}
}
impl<'a> std::fmt::Debug for RepositoryRef<'a> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, ".git")
}
}
impl Repository {
pub fn new(repo_uri: impl AsRef<std::path::Path>) -> Result<Self, Error> {
git2::Repository::open(repo_uri)
.map(Repository)
.map_err(Error::from)
}
pub fn as_ref(&'_ self) -> RepositoryRef<'_> {
RepositoryRef { repo_ref: &self.0 }
}
}
impl<'a> From<&'a Repository> for RepositoryRef<'a> {
fn from(repo: &'a Repository) -> Self {
repo.as_ref()
}
}
impl vcs::GetVcs<Error> for Repository {
type RepoId = String;
fn get_repo(repo_id: Self::RepoId) -> Result<Self, Error> {
git2::Repository::open(&repo_id)
.map(Repository)
.map_err(Error::from)
}
}
impl From<git2::Repository> for Repository {
fn from(repo: git2::Repository) -> Self {
Repository(repo)
}
}
impl std::fmt::Debug for Repository {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, ".git")
}
}