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use crate::{bstr, bstr::BStr, revision, Commit, ObjectDetached, Tree};
mod error {
use crate::object;
#[derive(Debug, thiserror::Error)]
#[allow(missing_docs)]
pub enum Error {
#[error(transparent)]
FindExistingObject(#[from] object::find::existing::Error),
#[error("The commit could not be decoded fully or partially")]
Decode(#[from] gix_object::decode::Error),
#[error("Expected object of type {}, but got {}", .expected, .actual)]
ObjectKind {
expected: gix_object::Kind,
actual: gix_object::Kind,
},
}
}
pub use error::Error;
impl<'repo> Commit<'repo> {
/// Create an owned instance of this object, copying our data in the process.
pub fn detached(&self) -> ObjectDetached {
ObjectDetached {
id: self.id,
kind: gix_object::Kind::Commit,
data: self.data.clone(),
}
}
/// Sever the connection to the `Repository` and turn this instance into a standalone object.
pub fn detach(self) -> ObjectDetached {
self.into()
}
}
impl<'repo> Commit<'repo> {
/// Turn this objects id into a shortened id with a length in hex as configured by `core.abbrev`.
pub fn short_id(&self) -> Result<gix_hash::Prefix, crate::id::shorten::Error> {
use crate::ext::ObjectIdExt;
self.id.attach(self.repo).shorten()
}
/// Parse the commits message into a [`MessageRef`][gix_object::commit::MessageRef]
pub fn message(&self) -> Result<gix_object::commit::MessageRef<'_>, gix_object::decode::Error> {
Ok(gix_object::commit::MessageRef::from_bytes(self.message_raw()?))
}
/// Decode the commit object until the message and return it.
pub fn message_raw(&self) -> Result<&'_ BStr, gix_object::decode::Error> {
gix_object::CommitRefIter::from_bytes(&self.data).message()
}
/// Obtain the message by using intricate knowledge about the encoding, which is fastest and
/// can't fail at the expense of error handling.
pub fn message_raw_sloppy(&self) -> &BStr {
use bstr::ByteSlice;
self.data
.find(b"\n\n")
.map(|pos| &self.data[pos + 2..])
.unwrap_or_default()
.as_bstr()
}
/// Decode the commit and obtain the time at which the commit was created.
///
/// For the time at which it was authored, refer to `.decode()?.author.time`.
pub fn time(&self) -> Result<gix_actor::Time, Error> {
Ok(self.committer()?.time)
}
/// Decode the entire commit object and return it for accessing all commit information.
///
/// It will allocate only if there are more than 2 parents.
///
/// Note that the returned commit object does make lookup easy and should be
/// used for successive calls to string-ish information to avoid decoding the object
/// more than once.
pub fn decode(&self) -> Result<gix_object::CommitRef<'_>, gix_object::decode::Error> {
gix_object::CommitRef::from_bytes(&self.data)
}
/// Return an iterator over tokens, representing this commit piece by piece.
pub fn iter(&self) -> gix_object::CommitRefIter<'_> {
gix_object::CommitRefIter::from_bytes(&self.data)
}
/// Return the commits author, with surrounding whitespace trimmed.
pub fn author(&self) -> Result<gix_actor::SignatureRef<'_>, gix_object::decode::Error> {
gix_object::CommitRefIter::from_bytes(&self.data)
.author()
.map(|s| s.trim())
}
/// Return the commits committer. with surrounding whitespace trimmed.
pub fn committer(&self) -> Result<gix_actor::SignatureRef<'_>, gix_object::decode::Error> {
gix_object::CommitRefIter::from_bytes(&self.data)
.committer()
.map(|s| s.trim())
}
/// Decode this commits parent ids on the fly without allocating.
// TODO: tests
pub fn parent_ids(&self) -> impl Iterator<Item = crate::Id<'repo>> + '_ {
use crate::ext::ObjectIdExt;
let repo = self.repo;
gix_object::CommitRefIter::from_bytes(&self.data)
.parent_ids()
.map(move |id| id.attach(repo))
}
/// Parse the commit and return the the tree object it points to.
pub fn tree(&self) -> Result<Tree<'repo>, Error> {
match self.tree_id()?.object()?.try_into_tree() {
Ok(tree) => Ok(tree),
Err(crate::object::try_into::Error { actual, expected, .. }) => Err(Error::ObjectKind { actual, expected }),
}
}
/// Parse the commit and return the the tree id it points to.
pub fn tree_id(&self) -> Result<crate::Id<'repo>, gix_object::decode::Error> {
gix_object::CommitRefIter::from_bytes(&self.data)
.tree_id()
.map(|id| crate::Id::from_id(id, self.repo))
}
/// Return our id own id with connection to this repository.
pub fn id(&self) -> crate::Id<'repo> {
use crate::ext::ObjectIdExt;
self.id.attach(self.repo)
}
/// Obtain a platform for traversing ancestors of this commit.
pub fn ancestors(&self) -> revision::walk::Platform<'repo> {
self.id().ancestors()
}
/// Create a platform to further configure a `git describe` operation to find a name for this commit by looking
/// at the closest annotated tags (by default) in its past.
pub fn describe(&self) -> crate::commit::describe::Platform<'repo> {
crate::commit::describe::Platform {
id: self.id,
repo: self.repo,
select: Default::default(),
first_parent: false,
id_as_fallback: false,
max_candidates: 10,
}
}
}
impl<'r> std::fmt::Debug for Commit<'r> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "Commit({})", self.id)
}
}
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