libstore: Make sure that initNix has been called

Prevent bugs like https://github.com/cachix/cachix/pull/477

3 files changed, 23 insertions, 0 deletions

diff --git a/src/libstore/globals.cc b/src/libstore/globals.cc
index b7f55cae7..130c5b670 100644
--- a/src/libstore/globals.cc
+++ b/src/libstore/globals.cc
@@ -291,4 +291,18 @@ void initPlugins()
     settings.pluginFiles.pluginsLoaded = true;
 }
 
+static bool initLibStoreDone = false;
+
+void assertLibStoreInitialized() {
+    if (!initLibStoreDone) {
+        printError("The program must call nix::initNix() before calling any libstore library functions.");
+        abort();
+    };
+}
+
+void initLibStore() {
+    initLibStoreDone = true;
+}
+
+
 }
diff --git a/src/libstore/globals.hh b/src/libstore/globals.hh
index 274a15dd7..22458efcf 100644
--- a/src/libstore/globals.hh
+++ b/src/libstore/globals.hh
@@ -984,4 +984,12 @@ std::vector<Path> getUserConfigFiles();
 
 extern const std::string nixVersion;
 
+/* NB: This is not sufficient. You need to call initNix() */
+void initLibStore();
+
+/* It's important to initialize before doing _anything_, which is why we
+   call upon the programmer to handle this correctly. However, we only add
+   this in a key locations, so as not to litter the code. */
+void assertLibStoreInitialized();
+
 }
diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index 80b60ca1b..426230ca5 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -458,6 +458,7 @@ Store::Store(const Params & params)
     : StoreConfig(params)
     , state({(size_t) pathInfoCacheSize})
 {
+    assertLibStoreInitialized();
 }