Add Asset::set_file_preserving_hash().

2 files changed, 16 insertions, 0 deletions

diff --git a/src/asset.cc b/src/asset.cc
index cd56c3ea..b69e68e8 100644
--- a/src/asset.cc
+++ b/src/asset.cc
@@ -163,6 +163,13 @@ Asset::set_file (path file) const
 
 
 void
+Asset::set_file_preserving_hash(path file) const
+{
+	_file = absolute(file);
+}
+
+
+void
 Asset::rename_file(path file)
 {
 	_file = absolute(file);
diff --git a/src/asset.h b/src/asset.h
index 923720ff..c5d50010 100644
--- a/src/asset.h
+++ b/src/asset.h
@@ -109,6 +109,15 @@ public:
 	 */
 	void set_file (boost::filesystem::path file) const;
 
+	/** Set the file that holds this asset on disk.  Calling this function
+	 *  preserves the object's store of its hash, so if the object already
+	 *  has a hash it is up to the caller to ensure that the new file has
+	 *  the same hash.
+	 *
+	 *  @param file New file's path.
+	 */
+	void set_file_preserving_hash(boost::filesystem::path file) const;
+
 	/** Set the file that holds this asset on disk.  The new file must
 	 *  be exactly the same as the old one, as this function assumes
 	 *  that the object's hash does not change.