5 files changed, 3 insertions, 85 deletions
diff --git a/repository/common.go b/repository/common.go
index 7fd7ae19..4cefbd9e 100644
--- a/repository/common.go
+++ b/repository/common.go
@@ -8,59 +8,6 @@ import (
 	"golang.org/x/crypto/openpgp/errors"
 )
 
-// nonNativeMerge is an implementation of a branch merge, for the case where
-// the underlying git implementation doesn't support it natively.
-func nonNativeMerge(repo RepoData, ref string, otherRef string, treeHashFn func() Hash) error {
-	commit, err := repo.ResolveRef(ref)
-	if err != nil {
-		return err
-	}
-
-	otherCommit, err := repo.ResolveRef(otherRef)
-	if err != nil {
-		return err
-	}
-
-	if commit == otherCommit {
-		// nothing to merge
-		return nil
-	}
-
-	// fast-forward is possible if otherRef include ref
-
-	otherCommits, err := repo.ListCommits(otherRef)
-	if err != nil {
-		return err
-	}
-
-	fastForwardPossible := false
-	for _, hash := range otherCommits {
-		if hash == commit {
-			fastForwardPossible = true
-			break
-		}
-	}
-
-	if fastForwardPossible {
-		return repo.UpdateRef(ref, otherCommit)
-	}
-
-	// fast-forward is not possible, we need to create a merge commit
-
-	// we need a Tree to make the commit, an empty Tree will do
-	emptyTreeHash, err := repo.StoreTree(nil)
-	if err != nil {
-		return err
-	}
-
-	newHash, err := repo.StoreCommit(emptyTreeHash, commit, otherCommit)
-	if err != nil {
-		return err
-	}
-
-	return repo.UpdateRef(ref, newHash)
-}
-
 // nonNativeListCommits is an implementation for ListCommits, for the case where
 // the underlying git implementation doesn't support if natively.
 func nonNativeListCommits(repo RepoData, ref string) ([]Hash, error) {
diff --git a/repository/gogit.go b/repository/gogit.go
index d6eb8621..fe434d88 100644
--- a/repository/gogit.go
+++ b/repository/gogit.go
@@ -630,13 +630,6 @@ func (repo *GoGitRepo) UpdateRef(ref string, hash Hash) error {
 	return repo.r.Storer.SetReference(plumbing.NewHashReference(plumbing.ReferenceName(ref), plumbing.NewHash(hash.String())))
 }
 
-// MergeRef merge other into ref and update the reference
-// If the update is not fast-forward, the callback treeHashFn will be called for the caller to generate
-// the Tree to store in the merge commit.
-func (repo *GoGitRepo) MergeRef(ref string, otherRef string, treeHashFn func() Hash) error {
-	return nonNativeMerge(repo, ref, otherRef, treeHashFn)
-}
-
 // RemoveRef will remove a Git reference
 func (repo *GoGitRepo) RemoveRef(ref string) error {
 	return repo.r.Storer.RemoveReference(plumbing.ReferenceName(ref))
diff --git a/repository/keyring.go b/repository/keyring.go
index 64365c39..6cba303e 100644
--- a/repository/keyring.go
+++ b/repository/keyring.go
@@ -15,7 +15,7 @@ var ErrKeyringKeyNotFound = keyring.ErrKeyNotFound
 type Keyring interface {
 	// Returns an Item matching the key or ErrKeyringKeyNotFound
 	Get(key string) (Item, error)
-	// Stores an Item on the keyring
+	// Stores an Item on the keyring. Set is idempotent.
 	Set(item Item) error
 	// Removes the item with matching key
 	Remove(key string) error
diff --git a/repository/repo.go b/repository/repo.go
index d7afa983..87426333 100644
--- a/repository/repo.go
+++ b/repository/repo.go
@@ -138,11 +138,6 @@ type RepoData interface {
 	// UpdateRef will create or update a Git reference
 	UpdateRef(ref string, hash Hash) error
 
-	// // MergeRef merge other into ref and update the reference
-	// // If the update is not fast-forward, the callback treeHashFn will be called for the caller to generate
-	// // the Tree to store in the merge commit.
-	// MergeRef(ref string, otherRef string, treeHashFn func() Hash) error
-
 	// RemoveRef will remove a Git reference
 	RemoveRef(ref string) error
 
diff --git a/repository/repo_testing.go b/repository/repo_testing.go
index 4a5c48bb..92aa1691 100644
--- a/repository/repo_testing.go
+++ b/repository/repo_testing.go
@@ -197,6 +197,8 @@ func RepoDataTest(t *testing.T, repo RepoData) {
 
 	err = repo.RemoveRef("refs/bugs/ref1")
 	require.NoError(t, err)
+
+	// TODO: testing for commit's signature
 }
 
 // helper to test a RepoClock
@@ -238,22 +240,3 @@ func randomData() []byte {
 	}
 	return b
 }
-
-func makeCommit(t *testing.T, repo RepoData, parents ...Hash) Hash {
-	blobHash, err := repo.StoreData(randomData())
-	require.NoError(t, err)
-
-	treeHash, err := repo.StoreTree([]TreeEntry{
-		{
-			ObjectType: Blob,
-			Hash:       blobHash,
-			Name:       "foo",
-		},
-	})
-	require.NoError(t, err)
-
-	commitHash, err := repo.StoreCommit(treeHash, parents...)
-	require.NoError(t, err)
-
-	return commitHash
-}