Use cxxopts for solar-server

src/solar-server/main.cpp

@@ -1,34 +1,56 @@
+#include <cxxopts.hpp>
+#include <optional>
 #include <pistache/endpoint.h>
 #include <solar/server/api.hpp>
 #include <solar/server/configuration.hpp>
-#include <tclap/CmdLine.h>
+#include <spdlog/spdlog.h>
+
+std::optional<cxxopts::ParseResult> ExtractArgs(int argc, char ** argv)
+{
+    cxxopts::Options options(
+        "solar-server",
+        "solar-server is a small Pistache based HTTP content server with a REST API to access the solar log database");
+
+    options.add_options()(
+        "p,listening-port",
+        "TCP port to listen on for REST API requests.",
+        cxxopts::value<unsigned>())(
+        "connection-string",
+        "Path to the sqlite3 database file",
+        cxxopts::value<std::string>());
+
+    if(argc == 1)
+    {
+        std::cout << options.help() << std::endl;
+        return {};
+    }
+
+    try
+    {
+        auto const parsed = options.parse(argc, argv);
+        return parsed;
+    }
+    catch(cxxopts::OptionException const & e)
+    {
+        spdlog::error(e.what());
+        return {};
+    }
+}
 
 int main(int argc, char ** argv)
 {
-    TCLAP::CmdLine cmd(
-        "solar-server is a small Pistache based HTTP content server with a REST API to access the solar log database",
-        ' ',
-        "1.0.0");
+    auto const maybeArgs = ExtractArgs(argc, argv);
+    if(!maybeArgs.has_value())
+    {
+        return 1;
+    }
 
-    TCLAP::ValueArg<unsigned>
-        listeningPortArg("p", "listening-port", "TCP listening port number", true, 0u, "TCP listening port number");
-    cmd.add(listeningPortArg);
-
-    TCLAP::ValueArg<std::string> databaseFileArg(
-        "d",
-        "database-file",
-        "Absolute path pointing to the solar SQLite *.db file",
-        true,
-        "",
-        "Absolute path pointing to the solar SQLite *.db file");
-    cmd.add(databaseFileArg);
-
-    cmd.parse(argc, argv);
+    auto const & args = maybeArgs.value();
 
     Configuration & config = Configuration::Get();
-    config.SetupDatabase(databaseFileArg.getValue());
+    config.SetupDatabase(args["connection-string"].as<std::string>());
 
-    Pistache::Address address(Pistache::Ipv4::any(), listeningPortArg.getValue());
+    Pistache::Address address(Pistache::Ipv4::any(), args["listening-port"].as<unsigned>());
     Pistache::Http::Endpoint server(address);
 
     auto options = Pistache::Http::Endpoint::options().threads(2);
@@ -38,5 +60,6 @@ int main(int argc, char ** argv)
     Api::SetupRouting(router);
     server.setHandler(router.handler());
 
+    spdlog::info("solar-server listening on localhost:{0}", args["listening-port"].as<unsigned>());
     server.serve();
 }

systemd/solar-server.service

@@ -5,7 +5,7 @@ After=network.target
 
 [Service]
 Type=simple
-ExecStart=/usr/local/bin/solar-server -d /mnt/data0/log/solarpaneloutput.db -p 3001
+ExecStart=/usr/local/bin/solar-server -p 3001 --connection-string /mnt/data0/log/solarpaneloutput.db
 Restart=always
 RestartSec=30