1 files changed, 49 insertions, 2 deletions
diff --git a/repository/repo.go b/repository/repo.go
index a58f35d9..26fe0fa6 100644
--- a/repository/repo.go
+++ b/repository/repo.go
@@ -1,7 +1,11 @@
 // Package repository contains helper methods for working with a Git repo.
 package repository
 
-import "github.com/MichaelMure/git-bug/util"
+import (
+	"bytes"
+	"github.com/MichaelMure/git-bug/util"
+	"strings"
+)
 
 // Repo represents a source code repository.
 type Repo interface {
@@ -26,8 +30,11 @@ type Repo interface {
 	// StoreData will store arbitrary data and return the corresponding hash
 	StoreData(data []byte) (util.Hash, error)
 
+	// ReadData will attempt to read arbitrary data from the given hash
+	ReadData(hash util.Hash) ([]byte, error)
+
 	// StoreTree will store a mapping key-->Hash as a Git tree
-	StoreTree(mapping map[string]util.Hash) (util.Hash, error)
+	StoreTree(mapping []TreeEntry) (util.Hash, error)
 
 	// StoreCommit will store a Git commit with the given Git tree
 	StoreCommit(treeHash util.Hash) (util.Hash, error)
@@ -37,4 +44,44 @@ type Repo interface {
 
 	// UpdateRef will create or update a Git reference
 	UpdateRef(ref string, hash util.Hash) error
+
+	// ListRefs will return a list of Git ref matching the given refspec
+	ListRefs(refspec string) ([]string, error)
+
+	// ListCommits will return the list of tree hashes of a ref, in chronological order
+	ListCommits(ref string) ([]util.Hash, error)
+
+	// ListEntries will return the list of entries in a Git tree
+	ListEntries(hash util.Hash) ([]TreeEntry, error)
+}
+
+func prepareTreeEntries(entries []TreeEntry) bytes.Buffer {
+	var buffer bytes.Buffer
+
+	for _, entry := range entries {
+		buffer.WriteString(entry.Format())
+	}
+
+	return buffer
+}
+
+func readTreeEntries(s string) ([]TreeEntry, error) {
+	splitted := strings.Split(s, "\n")
+
+	casted := make([]TreeEntry, len(splitted))
+	for i, line := range splitted {
+		if line == "" {
+			continue
+		}
+
+		entry, err := ParseTreeEntry(line)
+
+		if err != nil {
+			return nil, err
+		}
+
+		casted[i] = entry
+	}
+
+	return casted, nil
 }