made CMake install the right files

bin/CMakeLists.txt

 add_executable(hepnos-daemon hepnos-daemon.cpp)
 target_link_libraries(hepnos-daemon hepnos-service yaml-cpp margo bake-server sdskv-server)
+
+install(TARGETS hepnos-daemon DESTINATION bin)

include/hepnos/DataStore.hpp

@@ -32,6 +32,14 @@ class DataStore {
 
     public:
 
+
+    /**
+     * @brief Constructor. Initializes the DataStore by taking
+     * the name of the configuration file from the environment
+     * variable HEPNOS_CONFIG_FILE.
+     */
+    DataStore();
+
     /**
      * @brief Constructor. Initializes the DataStore using a YAML
      * configuration file (this file is generated by the HEPnOS

src/CMakeLists.txt

@@ -80,3 +80,7 @@ install (DIRECTORY ../include/hepnos
 install (DIRECTORY ../include/hepnos
          DESTINATION include
          FILES_MATCHING PATTERN "*.h")
+install (FILES ../include/hepnos.h
+		DESTINATION include)
+install (FILES ../include/hepnos-service.h
+		DESTINATION include)

src/DataStore.cpp

@@ -21,6 +21,15 @@ namespace hepnos {
 // DataStore implementation
 ////////////////////////////////////////////////////////////////////////////////////////////
 
+DataStore::DataStore() 
+: m_impl(std::make_unique<DataStore::Impl>(this)) {
+    char* file = getenv("HEPNOS_CONFIG_FILE");
+    if(file == nullptr) 
+        throw Exception("HEPNOS_CONFIG_FILE environment variable not set");
+    std::string configFile(file);
+    m_impl->init(configFile);
+}
+
 DataStore::DataStore(const std::string& configFile) 
 : m_impl(std::make_unique<DataStore::Impl>(this)) {
     m_impl->init(configFile);