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use super::ChangeDetached;
use crate::{
bstr::{BStr, ByteSlice},
ext::ObjectIdExt,
object::tree::diff::Change,
Repository,
};
impl Change<'_, '_, '_> {
/// Produce a platform for performing a line-diff no matter whether the underlying [Change] is an addition, modification,
/// deletion or rewrite.
/// Use `resource_cache` to store the diffable data and possibly reuse previously stored data, usually obtained with
/// [Repository::diff_resource_cache()].
/// Afterward the platform, which holds on to `resource_cache`, can be used to perform ready-made operations on the
/// pre-set resources.
///
/// ### Warning about Memory Consumption
///
/// `resource_cache` only grows, so one should call [`gix_diff::blob::Platform::clear_resource_cache`] occasionally.
pub fn diff<'b>(
&self,
resource_cache: &'b mut gix_diff::blob::Platform,
) -> Result<crate::object::blob::diff::Platform<'b>, crate::object::blob::diff::init::Error> {
resource_cache.set_resource_by_change((*self).into(), &self.id().repo.objects)?;
Ok(crate::object::blob::diff::Platform { resource_cache })
}
}
impl<'a> From<Change<'a, '_, '_>> for gix_diff::tree_with_rewrites::ChangeRef<'a> {
fn from(value: Change<'a, '_, '_>) -> Self {
use gix_diff::tree_with_rewrites::ChangeRef;
match value {
Change::Addition {
location,
entry_mode,
relation,
id,
} => ChangeRef::Addition {
location,
entry_mode,
relation,
id: id.detach(),
},
Change::Deletion {
location,
entry_mode,
relation,
id,
} => ChangeRef::Deletion {
location,
entry_mode,
relation,
id: id.detach(),
},
Change::Modification {
location,
previous_entry_mode,
previous_id,
entry_mode,
id,
} => ChangeRef::Modification {
location,
previous_entry_mode,
previous_id: previous_id.detach(),
entry_mode,
id: id.detach(),
},
Change::Rewrite {
source_location,
source_relation,
source_entry_mode,
source_id,
diff,
entry_mode,
location,
id,
relation,
copy,
} => ChangeRef::Rewrite {
source_location,
source_entry_mode,
source_relation,
source_id: source_id.detach(),
diff,
entry_mode,
id: id.detach(),
location,
relation,
copy,
},
}
}
}
impl<'a, 'old, 'new> Change<'a, 'old, 'new> {
/// Convert `change` into this instance type, attaching the `old_repo` and `new_repo` to each side respectively.
/// Note that both repos are typically the same.
pub fn from_change_ref(
change: gix_diff::tree_with_rewrites::ChangeRef<'a>,
old_repo: &'old Repository,
new_repo: &'new Repository,
) -> Self {
use gix_diff::tree_with_rewrites::ChangeRef;
match change {
ChangeRef::Addition {
location,
entry_mode,
relation,
id,
} => Change::Addition {
location,
entry_mode,
relation,
id: id.attach(new_repo),
},
ChangeRef::Deletion {
location,
entry_mode,
relation,
id,
} => Change::Deletion {
location,
entry_mode,
relation,
id: id.attach(old_repo),
},
ChangeRef::Modification {
location,
previous_entry_mode,
previous_id,
entry_mode,
id,
} => Change::Modification {
location,
previous_entry_mode,
entry_mode,
previous_id: previous_id.attach(old_repo),
id: id.attach(new_repo),
},
ChangeRef::Rewrite {
source_location,
source_entry_mode,
source_relation,
source_id,
diff,
entry_mode,
id,
location,
relation,
copy,
} => Change::Rewrite {
source_location,
source_relation,
source_entry_mode,
source_id: source_id.attach(old_repo),
diff,
entry_mode,
location,
id: id.attach(new_repo),
relation,
copy,
},
}
}
}
/// Lifecycle
impl Change<'_, '_, '_> {
/// Detach the repository instance to obtain a fully-owned version
pub fn detach(self) -> ChangeDetached {
match self {
Change::Addition {
entry_mode,
id,
location,
relation,
} => ChangeDetached::Addition {
entry_mode,
id: id.detach(),
location: location.to_owned(),
relation,
},
Change::Deletion {
entry_mode,
id,
location,
relation,
} => ChangeDetached::Deletion {
entry_mode,
id: id.detach(),
location: location.to_owned(),
relation,
},
Change::Modification {
previous_entry_mode,
previous_id,
entry_mode,
id,
location,
} => ChangeDetached::Modification {
previous_entry_mode,
previous_id: previous_id.detach(),
entry_mode,
id: id.detach(),
location: location.to_owned(),
},
Change::Rewrite {
source_location,
source_relation,
source_entry_mode,
source_id,
diff,
entry_mode,
id,
relation,
copy,
location,
} => ChangeDetached::Rewrite {
source_location: source_location.to_owned(),
source_entry_mode,
source_relation,
source_id: source_id.detach(),
diff,
entry_mode,
id: id.detach(),
copy,
location: location.to_owned(),
relation,
},
}
}
}
impl crate::ext::TreeDiffChangeExt for gix_diff::tree_with_rewrites::Change {
fn attach<'old, 'new>(&self, old_repo: &'old Repository, new_repo: &'new Repository) -> Change<'_, 'old, 'new> {
match self {
ChangeDetached::Addition {
entry_mode,
id,
location,
relation,
} => Change::Addition {
entry_mode: *entry_mode,
id: id.attach(new_repo),
location: location.as_bstr(),
relation: *relation,
},
ChangeDetached::Deletion {
entry_mode,
id,
location,
relation,
} => Change::Deletion {
entry_mode: *entry_mode,
id: id.attach(old_repo),
location: location.as_bstr(),
relation: *relation,
},
ChangeDetached::Modification {
previous_entry_mode,
previous_id,
entry_mode,
id,
location,
} => Change::Modification {
previous_entry_mode: *previous_entry_mode,
previous_id: previous_id.attach(old_repo),
entry_mode: *entry_mode,
id: id.attach(new_repo),
location: location.as_bstr(),
},
ChangeDetached::Rewrite {
source_location,
source_relation,
source_entry_mode,
source_id,
diff,
entry_mode,
id,
copy,
location,
relation,
} => Change::Rewrite {
source_location: source_location.as_ref(),
source_relation: *source_relation,
source_entry_mode: *source_entry_mode,
source_id: source_id.attach(old_repo),
diff: *diff,
entry_mode: *entry_mode,
id: id.attach(new_repo),
copy: *copy,
relation: *relation,
location: location.as_bstr(),
},
}
}
}
impl Change<'_, '_, '_> {
/// Return the current ID of the change.
pub fn id(&self) -> crate::Id<'_> {
match self {
Change::Addition { id, .. }
| Change::Deletion { id, .. }
| Change::Modification { id, .. }
| Change::Rewrite { id, .. } => *id,
}
}
/// Return the location of this instance.
pub fn location(&self) -> &BStr {
match self {
Change::Addition { location, .. }
| Change::Deletion { location, .. }
| Change::Modification { location, .. }
| Change::Rewrite { location, .. } => location.as_bstr(),
}
}
/// Return the current mode of this instance.
pub fn entry_mode(&self) -> gix_object::tree::EntryMode {
match self {
Change::Addition { entry_mode, .. }
| Change::Deletion { entry_mode, .. }
| Change::Modification { entry_mode, .. }
| Change::Rewrite { entry_mode, .. } => *entry_mode,
}
}
}