thodg/libgit2

diff --git a/src/config_entries.c b/src/config_entries.c
new file mode 100644
index 0000000..644e60c
--- /dev/null
+++ b/src/config_entries.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "config_entries.h"
+
+static void config_entry_list_free(config_entry_list *list)
+{
+	config_entry_list *next;
+
+	while (list != NULL) {
+		next = list->next;
+
+		git__free((char*) list->entry->name);
+		git__free((char *) list->entry->value);
+		git__free(list->entry);
+		git__free(list);
+
+		list = next;
+	};
+}
+
+static void config_entry_list_append(config_entry_list **list, config_entry_list *entry)
+{
+	if (*list)
+		(*list)->last->next = entry;
+	else
+		*list = entry;
+	(*list)->last = entry;
+}
+
+int diskfile_entries_alloc(diskfile_entries **out)
+{
+	diskfile_entries *entries;
+	int error;
+
+	entries = git__calloc(1, sizeof(diskfile_entries));
+	GITERR_CHECK_ALLOC(entries);
+
+	git_atomic_set(&entries->refcount, 1);
+
+	if ((error = git_strmap_alloc(&entries->map)) < 0)
+		git__free(entries);
+	else
+		*out = entries;
+
+	return error;
+}
+
+void diskfile_entries_free(diskfile_entries *entries)
+{
+	config_entry_list *list = NULL, *next;
+
+	if (!entries)
+		return;
+
+	if (git_atomic_dec(&entries->refcount) != 0)
+		return;
+
+	git_strmap_foreach_value(entries->map, list, config_entry_list_free(list));
+	git_strmap_free(entries->map);
+
+	list = entries->list;
+	while (list != NULL) {
+		next = list->next;
+		git__free(list);
+		list = next;
+	}
+
+	git__free(entries);
+}
+
+int diskfile_entries_append(diskfile_entries *entries, git_config_entry *entry)
+{
+	git_strmap_iter pos;
+	config_entry_list *existing, *var;
+	int error = 0;
+
+	var = git__calloc(1, sizeof(config_entry_list));
+	GITERR_CHECK_ALLOC(var);
+	var->entry = entry;
+
+	pos = git_strmap_lookup_index(entries->map, entry->name);
+	if (!git_strmap_valid_index(entries->map, pos)) {
+		/*
+		 * We only ever inspect `last` from the first config
+		 * entry in a multivar. In case where this new entry is
+		 * the first one in the entry map, it will also be the
+		 * last one at the time of adding it, which is
+		 * why we set `last` here to itself. Otherwise we
+		 * do not have to set `last` and leave it set to
+		 * `NULL`.
+		 */
+		var->last = var;
+
+		git_strmap_insert(entries->map, entry->name, var, &error);
+
+		if (error > 0)
+			error = 0;
+	} else {
+		existing = git_strmap_value_at(entries->map, pos);
+		config_entry_list_append(&existing, var);
+	}
+
+	var = git__calloc(1, sizeof(config_entry_list));
+	GITERR_CHECK_ALLOC(var);
+	var->entry = entry;
+	config_entry_list_append(&entries->list, var);
+
+	return error;
+}
+
+void config_iterator_free(
+	git_config_iterator* iter)
+{
+	iter->backend->free(iter->backend);
+	git__free(iter);
+}
+
+int config_iterator_next(
+	git_config_entry **entry,
+	git_config_iterator *iter)
+{
+	git_config_file_iter *it = (git_config_file_iter *) iter;
+
+	if (!it->head)
+		return GIT_ITEROVER;
+
+	*entry = it->head->entry;
+	it->head = it->head->next;
+
+	return 0;
+}
diff --git a/src/config_entries.h b/src/config_entries.h
new file mode 100644
index 0000000..fbb901b
--- /dev/null
+++ b/src/config_entries.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "git2/sys/config.h"
+#include "config.h"
+
+typedef struct config_entry_list {
+	struct config_entry_list *next;
+	struct config_entry_list *last;
+	git_config_entry *entry;
+} config_entry_list;
+
+typedef struct {
+	git_atomic refcount;
+	git_strmap *map;
+	config_entry_list *list;
+} diskfile_entries;
+
+typedef struct git_config_file_iter {
+	git_config_iterator parent;
+	config_entry_list *head;
+} git_config_file_iter;
+
+int diskfile_entries_alloc(diskfile_entries **out);
+void diskfile_entries_free(diskfile_entries *entries);
+/* Add or append the new config option */
+int diskfile_entries_append(diskfile_entries *entries, git_config_entry *entry);
+
+void config_iterator_free(git_config_iterator* iter);
+int config_iterator_next(git_config_entry **entry,
+	git_config_iterator *iter);
diff --git a/src/config_file.c b/src/config_file.c
index a14358d..1934ec2 100644
--- a/src/config_file.c
+++ b/src/config_file.c
@@ -17,32 +17,16 @@
 #include "strmap.h"
 #include "array.h"
 #include "config_parse.h"
+#include "config_entries.h"
 
 #include <ctype.h>
 #include <sys/types.h>
 #include <regex.h>
 
-typedef struct config_entry_list {
-	struct config_entry_list *next;
-	struct config_entry_list *last;
-	git_config_entry *entry;
-} config_entry_list;
-
-typedef struct git_config_file_iter {
-	git_config_iterator parent;
-	config_entry_list *head;
-} git_config_file_iter;
-
 /* Max depth for [include] directives */
 #define MAX_INCLUDE_DEPTH 10
 
 typedef struct {
-	git_atomic refcount;
-	git_strmap *map;
-	config_entry_list *list;
-} diskfile_entries;
-
-typedef struct {
 	git_config_backend parent;
 	/* mutex to coordinate accessing the values */
 	git_mutex values_mutex;
@@ -89,95 +73,6 @@ static int config_error_readonly(void)
 	return -1;
 }
 
-static void config_entry_list_free(config_entry_list *list)
-{
-	config_entry_list *next;
-
-	while (list != NULL) {
-		next = list->next;
-
-		git__free((char*) list->entry->name);
-		git__free((char *) list->entry->value);
-		git__free(list->entry);
-		git__free(list);
-
-		list = next;
-	};
-}
-
-static void config_entry_list_append(config_entry_list **list, config_entry_list *entry)
-{
-	if (*list)
-		(*list)->last->next = entry;
-	else
-		*list = entry;
-	(*list)->last = entry;
-}
-
-/* Add or append the new config option */
-static int diskfile_entries_append(diskfile_entries *entries, git_config_entry *entry)
-{
-	git_strmap_iter pos;
-	config_entry_list *existing, *var;
-	int error = 0;
-
-	var = git__calloc(1, sizeof(config_entry_list));
-	GITERR_CHECK_ALLOC(var);
-	var->entry = entry;
-
-	pos = git_strmap_lookup_index(entries->map, entry->name);
-	if (!git_strmap_valid_index(entries->map, pos)) {
-		/*
-		 * We only ever inspect `last` from the first config
-		 * entry in a multivar. In case where this new entry is
-		 * the first one in the entry map, it will also be the
-		 * last one at the time of adding it, which is
-		 * why we set `last` here to itself. Otherwise we
-		 * do not have to set `last` and leave it set to
-		 * `NULL`.
-		 */
-		var->last = var;
-
-		git_strmap_insert(entries->map, entry->name, var, &error);
-
-		if (error > 0)
-			error = 0;
-	} else {
-		existing = git_strmap_value_at(entries->map, pos);
-		config_entry_list_append(&existing, var);
-	}
-
-	var = git__calloc(1, sizeof(config_entry_list));
-	GITERR_CHECK_ALLOC(var);
-	var->entry = entry;
-	config_entry_list_append(&entries->list, var);
-
-	return error;
-}
-
-static void diskfile_entries_free(diskfile_entries *entries)
-{
-	config_entry_list *list = NULL, *next;
-
-	if (!entries)
-		return;
-
-	if (git_atomic_dec(&entries->refcount) != 0)
-		return;
-
-	git_strmap_foreach_value(entries->map, list, config_entry_list_free(list));
-	git_strmap_free(entries->map);
-
-	list = entries->list;
-	while (list != NULL) {
-		next = list->next;
-		git__free(list);
-		list = next;
-	}
-
-	git__free(entries);
-}
-
 /**
  * Take the current values map from the backend and increase its
  * refcount. This is its own function to make sure we use the mutex to
@@ -200,24 +95,6 @@ static diskfile_entries *diskfile_entries_take(diskfile_header *h)
 	return entries;
 }
 
-static int diskfile_entries_alloc(diskfile_entries **out)
-{
-	diskfile_entries *entries;
-	int error;
-
-	entries = git__calloc(1, sizeof(diskfile_entries));
-	GITERR_CHECK_ALLOC(entries);
-
-	git_atomic_set(&entries->refcount, 1);
-
-	if ((error = git_strmap_alloc(&entries->map)) < 0)
-		git__free(entries);
-	else
-		*out = entries;
-
-	return error;
-}
-
 static void config_file_clear(struct config_file *file)
 {
 	struct config_file *include;
@@ -348,28 +225,6 @@ static void backend_free(git_config_backend *_backend)
 	git__free(backend);
 }
 
-static void config_iterator_free(
-	git_config_iterator* iter)
-{
-	iter->backend->free(iter->backend);
-	git__free(iter);
-}
-
-static int config_iterator_next(
-	git_config_entry **entry,
-	git_config_iterator *iter)
-{
-	git_config_file_iter *it = (git_config_file_iter *) iter;
-
-	if (!it->head)
-		return GIT_ITEROVER;
-
-	*entry = it->head->entry;
-	it->head = it->head->next;
-
-	return 0;
-}
-
 static int config_iterator_new(
 	git_config_iterator **iter,
 	struct git_config_backend* backend)