Don't write the same asset more than once to an ASSETMAP.multi-fonts-in-pkl

1 files changed, 7 insertions, 1 deletions

diff --git a/src/asset_map.cc b/src/asset_map.cc
index c1bafd92..615e1f5e 100644
--- a/src/asset_map.cc
+++ b/src/asset_map.cc
@@ -112,7 +112,13 @@ AssetMap::Asset::Asset(cxml::ConstNodePtr node, boost::filesystem::path root, dc
 void
 AssetMap::add_asset(string id, boost::filesystem::path path, bool pkl)
 {
-        _assets.push_back(Asset(id, path, pkl));
+	auto iter = std::find_if(_assets.begin(), _assets.end(), [id](Asset const& a) { return a.id() == id; });
+	if (iter == _assets.end()) {
+		_assets.push_back(Asset(id, path, pkl));
+	} else {
+		/* We already have this asset, so let's hope it's actually the same one */
+		DCP_ASSERT(iter->path() == path);
+	}
 }