indexer: add git_indexer_stream_free() and _hash()

include/git2/indexer.h

@@ -53,6 +53,23 @@ GIT_EXTERN(int) git_indexer_stream_add(git_indexer_stream *idx, void *data, size
 GIT_EXTERN(int) git_indexer_stream_finalize(git_indexer_stream *idx, git_indexer_stats *stats);
 
 /**
+ * Get the packfile's hash
+ *
+ * A packfile's name is derived from the sorted hashing of all object
+ * names. This is only correct after the index has been finalized.
+ *
+ * @param idx the indexer instance
+ */
+GIT_EXTERN(const git_oid *) git_indexer_stream_hash(git_indexer_stream *idx);
+
+/**
+ * Free the indexer and its resources
+ *
+ * @param idx the indexer to free
+ */
+GIT_EXTERN(void) git_indexer_stream_free(git_indexer_stream *idx);
+
+/**
  * Create a new indexer instance
  *
  * @param out where to store the indexer instance

src/indexer.c

@@ -60,6 +60,11 @@ const git_oid *git_indexer_hash(git_indexer *idx)
 	return &idx->hash;
 }
 
+const git_oid *git_indexer_stream_hash(git_indexer_stream *idx)
+{
+	return &idx->hash;
+}
+
 static int open_pack(struct git_pack_file **out, const char *filename)
 {
 	size_t namelen;
@@ -544,6 +549,30 @@ on_error:
 	return -1;
 }
 
+void git_indexer_stream_free(git_indexer_stream *idx)
+{
+	unsigned int i;
+	struct entry *e;
+	struct git_pack_entry *pe;
+	struct delta_info *delta;
+
+	if (idx == NULL)
+		return;
+
+	p_close(idx->pack->mwf.fd);
+	git_vector_foreach(&idx->objects, i, e)
+		git__free(e);
+	git_vector_free(&idx->objects);
+	git_vector_foreach(&idx->pack->cache, i, pe)
+		git__free(pe);
+	git_vector_free(&idx->pack->cache);
+	git_vector_foreach(&idx->deltas, i, delta)
+		git__free(delta);
+	git_vector_free(&idx->deltas);
+	git__free(idx->pack);
+	git__free(idx);
+}
+
 int git_indexer_new(git_indexer **out, const char *packname)
 {
 	git_indexer *idx;