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package mergebase
import (
commitgraphread "codeberg.org/lindenii/furgit/format/commitgraph/read"
"codeberg.org/lindenii/furgit/objectid"
"codeberg.org/lindenii/furgit/objectstore"
)
// Base reports one merge base between left and right, if any.
//
// Both inputs are peeled through annotated tags before commit traversal.
func Base(
store objectstore.Store,
graph *commitgraphread.Reader,
left objectid.ObjectID,
right objectid.ObjectID,
) (objectid.ObjectID, bool, error) {
query := Query(store, graph, left, right)
seq := query.Seq()
var (
first objectid.ObjectID
ok bool
)
seq(func(id objectid.ObjectID) bool {
first = id
ok = true
return false
})
err := query.Err()
if err != nil {
return objectid.ObjectID{}, false, err
}
if !ok {
return objectid.ObjectID{}, false, nil
}
return first, true, nil
}
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