diff --git a/cache.h b/cache.h
index 35e0ad7e0e..73e05dcd8b 100644
--- a/cache.h
+++ b/cache.h
@@ -224,6 +224,8 @@ void datestamp(char *buf, int bufsize);
 
 extern int setup_ident(void);
 extern char *get_ident(const char *name, const char *email, const char *date_str);
+extern char *git_author_info(void);
+extern char *git_committer_info(void);
 
 static inline void *xmalloc(size_t size)
 {
diff --git a/commit-tree.c b/commit-tree.c
index 8f3b96c26d..d545f62aaa 100644
--- a/commit-tree.c
+++ b/commit-tree.c
@@ -79,16 +79,6 @@ static int new_parent(int idx)
 	return 1;
 }
 
-static char *git_author_info(void)
-{
-	return get_ident(gitenv("GIT_AUTHOR_NAME"), gitenv("GIT_AUTHOR_EMAIL"), gitenv("GIT_AUTHOR_DATE"));
-}
-
-static char *git_committer_info(void)
-{
-	return get_ident(gitenv("GIT_COMMITTER_NAME"), gitenv("GIT_COMMITTER_EMAIL"), gitenv("GIT_COMMITTER_DATE"));
-}
-
 int main(int argc, char **argv)
 {
 	int i;
diff --git a/ident.c b/ident.c
index faff44175b..8da5609cb6 100644
--- a/ident.c
+++ b/ident.c
@@ -136,3 +136,13 @@ char *get_ident(const char *name, const char *email, const char *date_str)
 	buffer[i] = 0;
 	return buffer;
 }
+
+char *git_author_info(void)
+{
+	return get_ident(gitenv("GIT_AUTHOR_NAME"), gitenv("GIT_AUTHOR_EMAIL"), gitenv("GIT_AUTHOR_DATE"));
+}
+
+char *git_committer_info(void)
+{
+	return get_ident(gitenv("GIT_COMMITTER_NAME"), gitenv("GIT_COMMITTER_EMAIL"), gitenv("GIT_COMMITTER_DATE"));
+}