Add APIs for git attributes

This adds APIs for querying git attributes.  In addition to
the new API in include/git2/attr.h, most of the action is in
src/attr_file.[hc] which contains utilities for dealing with
a single attributes file, and src/attr.[hc] which contains
the implementation of the APIs that merge all applicable
attributes files.

1 files changed, 56 insertions, 0 deletions

diff --git a/include/git2/attr.h b/include/git2/attr.h
new file mode 100644
index 000000000..d585937b7
--- /dev/null
+++ b/include/git2/attr.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2009-2011 the libgit2 contributors
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_git_attr_h__
+#define INCLUDE_git_attr_h__
+
+#include "common.h"
+#include "types.h"
+
+/**
+ * @file git2/attr.h
+ * @brief Git attribute management routines
+ * @defgroup git_attr Git attribute management routines
+ * @ingroup Git
+ * @{
+ */
+GIT_BEGIN_DECL
+
+#define GIT_ATTR_TRUE			git_attr__true
+#define GIT_ATTR_FALSE			git_attr__false
+#define GIT_ATTR_UNSPECIFIED	NULL
+
+GIT_EXTERN(const char *)git_attr__true;
+GIT_EXTERN(const char *)git_attr__false;
+
+
+/**
+ * Lookup attribute for path returning string caller must free
+ */
+GIT_EXTERN(int) git_attr_get(
+    git_repository *repo, const char *path, const char *name,
+	const char **value);
+
+/**
+ * Lookup list of attributes for path, populating array of strings
+ */
+GIT_EXTERN(int) git_attr_get_many(
+    git_repository *repo, const char *path,
+    size_t num_attr, const char **names,
+	const char **values);
+
+/**
+ * Perform an operation on each attribute of a path.
+ */
+GIT_EXTERN(int) git_attr_foreach(
+    git_repository *repo, const char *path,
+	int (*callback)(const char *name, const char *value, void *payload),
+	void *payload);
+
+/** @} */
+GIT_END_DECL
+#endif
+