2 files changed, 9 insertions, 0 deletions
diff --git a/src/pkl.cc b/src/pkl.cc
index adcad573..b2fe875b 100644
--- a/src/pkl.cc
+++ b/src/pkl.cc
@@ -49,6 +49,7 @@ static string const pkl_interop_ns = "http://www.digicine.com/PROTO-ASDCP-PKL-20
 static string const pkl_smpte_ns   = "http://www.smpte-ra.org/schemas/429-8/2007/PKL";
 
 PKL::PKL (boost::filesystem::path file)
+	: _file (file)
 {
 	cxml::Document pkl ("PackingList");
 	pkl.read_file (file);
@@ -116,6 +117,7 @@ PKL::write (boost::filesystem::path file, shared_ptr<const CertificateChain> sig
 	}
 
 	doc.write_to_file_formatted (file.string(), "UTF-8");
+	_file = file;
 }
 
 optional<string>
diff --git a/src/pkl.h b/src/pkl.h
index bc71279e..39996318 100644
--- a/src/pkl.h
+++ b/src/pkl.h
@@ -66,6 +66,11 @@ public:
 	void add_asset (std::string id, boost::optional<std::string> annotation_text, std::string hash, int64_t size, std::string type);
 	void write (boost::filesystem::path file, boost::shared_ptr<const CertificateChain> signer) const;
 
+	/** @return the most recent disk file used to read or write this PKL, if there is one */
+	boost::optional<boost::filesystem::path> file () const {
+		return _file;
+	}
+
 private:
 
 	class Asset : public Object
@@ -99,6 +104,8 @@ private:
 	std::string _issuer;
 	std::string _creator;
 	std::list<boost::shared_ptr<Asset> > _asset_list;
+	/** The most recent disk file used to read or write this PKL */
+	mutable boost::optional<boost::filesystem::path> _file;
 };
 
 }