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package reachability
import (
"errors"
commitgraphread "codeberg.org/lindenii/furgit/format/commitgraph/read"
objectid "codeberg.org/lindenii/furgit/object/id"
objecttype "codeberg.org/lindenii/furgit/object/type"
)
func (walk *Walk) expandCommitsFromGraph(id objectid.ObjectID) ([]walkItem, bool, error) {
pos, err := walk.reachability.graph.Lookup(id)
if err != nil {
if _, ok := errors.AsType[*commitgraphread.NotFoundError](err); ok {
return nil, false, nil
}
return nil, true, err
}
commit, err := walk.reachability.graph.CommitAt(pos)
if err != nil {
return nil, true, err
}
next := make([]walkItem, 0, 2+len(commit.ExtraParents))
if commit.Parent1.Valid {
parentOID, err := walk.reachability.graph.OIDAt(commit.Parent1.Pos)
if err != nil {
return nil, true, err
}
next = append(next, walkItem{id: parentOID, want: objecttype.TypeInvalid})
}
if commit.Parent2.Valid {
parentOID, err := walk.reachability.graph.OIDAt(commit.Parent2.Pos)
if err != nil {
return nil, true, err
}
next = append(next, walkItem{id: parentOID, want: objecttype.TypeInvalid})
}
for _, parentPos := range commit.ExtraParents {
parentOID, err := walk.reachability.graph.OIDAt(parentPos)
if err != nil {
return nil, true, err
}
next = append(next, walkItem{id: parentOID, want: objecttype.TypeInvalid})
}
return next, true, nil
}
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