1 files changed, 34 insertions, 0 deletions
diff --git a/libbuild2/version/snapshot.hxx b/libbuild2/version/snapshot.hxx
new file mode 100644
index 0000000..86b6eab
--- /dev/null
+++ b/libbuild2/version/snapshot.hxx
@@ -0,0 +1,34 @@
+// file      : libbuild2/version/snapshot.hxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef LIBBUILD2_VERSION_SNAPSHOT_HXX
+#define LIBBUILD2_VERSION_SNAPSHOT_HXX
+
+#include <libbuild2/types.hxx>
+#include <libbuild2/utility.hxx>
+
+#include <libbuild2/scope.hxx>
+
+namespace build2
+{
+  namespace version
+  {
+    struct snapshot
+    {
+      uint64_t sn = 0;
+      string id;
+      bool committed = false;
+
+      bool
+      empty () const {return sn == 0;}
+    };
+
+    // Return empty snapshot if unknown scm or uncommitted.
+    //
+    snapshot
+    extract_snapshot (const scope& rs);
+  }
+}
+
+#endif // LIBBUILD2_VERSION_SNAPSHOT_HXX