Add environment variables to control library logging

Closes #23

src/common/logger/logger.hpp

@@ -66,7 +66,7 @@ public:
             } else if(type == "file") {
                 m_internal_logger =
                         spdlog::basic_logger_mt<spdlog::async_factory>(
-                                ident, log_file.string());
+                                ident, log_file.string(), true);
 
             }
 #ifdef SPDLOG_ENABLE_SYSLOG

src/lib/CMakeLists.txt

@@ -26,7 +26,7 @@ add_library(adm_iosched SHARED)
 
 target_sources(adm_iosched
   PUBLIC admire.h admire.hpp
-  PRIVATE admire.cpp c_wrapper.cpp detail/impl.hpp detail/impl.cpp errors.c)
+  PRIVATE admire.cpp c_wrapper.cpp detail/impl.hpp detail/impl.cpp errors.c env.hpp)
 
 set_target_properties(adm_iosched PROPERTIES PUBLIC_HEADER "admire.h;admire.hpp")
 

src/lib/admire.cpp

@@ -27,18 +27,20 @@
 #include <net/proto/rpc_types.h>
 #include <logger/logger.hpp>
 #include <utils/ctype_ptr.hpp>
+#include <env.hpp>
+#include <iostream>
 #include "detail/impl.hpp"
 
 
 namespace {
 
-void
+[[maybe_unused]] void
 init_library() __attribute__((constructor));
 
 void
 init_logger();
 
-void
+[[maybe_unused]] void
 init_library() {
     init_logger();
 }
@@ -46,8 +48,24 @@ init_library() {
 /** Logging for the library */
 void
 init_logger() {
-    // for now, just create a simple console logger
-    scord::logger::create_global_logger("libadm_iosched", "console color");
+
+    try {
+
+
+        if(const auto p = std::getenv(admire::env::LOG);
+           p && !std::string{p}.empty() && std::string{p} != "0") {
+            if(const auto log_file = std::getenv(admire::env::LOG_OUTPUT)) {
+                scord::logger::create_global_logger("libadm_iosched", "file",
+                                                    log_file);
+            } else {
+                scord::logger::create_global_logger("libadm_iosched",
+                                                    "console color");
+            }
+        }
+    } catch(const std::exception& ex) {
+        std::cerr << fmt::format("WARNING: Error initializing logger: {}",
+                                 ex.what());
+    }
 }
 
 void

src/lib/env.hpp

+/******************************************************************************
+ * Copyright 2021-2022, Barcelona Supercomputing Center (BSC), Spain
+ *
+ * This software was partially supported by the EuroHPC-funded project ADMIRE
+ *   (Project ID: 956748, https://www.admire-eurohpc.eu).
+ *
+ * This file is part of scord.
+ *
+ * scord is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * scord is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with scord.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *****************************************************************************/
+
+#ifndef LIBSCORD_ENV_HPP
+#define LIBSCORD_ENV_HPP
+
+#define LIBSCORD_ENV_PREFIX "LIBSCORD_"
+#define ADD_PREFIX(str)     LIBSCORD_ENV_PREFIX str
+
+namespace admire::env {
+
+static constexpr auto LOG = ADD_PREFIX("LOG");
+static constexpr auto LOG_OUTPUT = ADD_PREFIX("LOG_OUTPUT");
+
+} // namespace admire::env
+
+
+#endif // LIBSCORD_ENV_HPP