Move App

1 files changed, 28 insertions, 0 deletions

diff --git a/src/nix/app.cc b/src/nix/app.cc
new file mode 100644
index 000000000..749dea02b
--- /dev/null
+++ b/src/nix/app.cc
@@ -0,0 +1,28 @@
+#include "installables.hh"
+#include "store-api.hh"
+#include "eval-inline.hh"
+
+namespace nix {
+
+App::App(EvalState & state, Value & vApp)
+{
+    state.forceAttrs(vApp);
+
+    auto aType = vApp.attrs->need(state.sType);
+    if (state.forceStringNoCtx(*aType.value, *aType.pos) != "app")
+        throw Error("value does not have type 'app', at %s", *aType.pos);
+
+    auto aProgram = vApp.attrs->need(state.symbols.create("program"));
+    program = state.forceString(*aProgram.value, context, *aProgram.pos);
+
+    // FIXME: check that 'program' is in the closure of 'context'.
+    if (!state.store->isInStore(program))
+        throw Error("app program '%s' is not in the Nix store", program);
+}
+
+App Installable::toApp(EvalState & state)
+{
+    return App(state, *toValue(state).first);
+}
+
+}