AVRO-3435: Add --version to avrogen tool

lang/c++/CMakeLists.txt

@@ -92,6 +92,8 @@ endif (SNAPPY_FOUND)
 
 add_definitions (${Boost_LIB_DIAGNOSTIC_DEFINITIONS})
 
+add_definitions (-DAVRO_VERSION="${AVRO_VERSION_MAJOR}.${AVRO_VERSION_MINOR}.${AVRO_VERSION_PATCH}")
+
 include_directories (api ${CMAKE_CURRENT_BINARY_DIR} ${Boost_INCLUDE_DIRS})
 
 set (AVRO_SOURCE_FILES

lang/c++/impl/avrogencpp.cc

@@ -810,23 +810,28 @@ int main(int argc, char **argv) {
     const string NO_UNION_TYPEDEF("no-union-typedef");
 
     po::options_description desc("Allowed options");
-    desc.add_options()("help,h", "produce help message")("include-prefix,p", po::value<string>()->default_value("avro"),
+    desc.add_options()("help,h", "produce help message")("version,V", "produce version information")("include-prefix,p", po::value<string>()->default_value("avro"),
                                                          "prefix for include headers, - for none, default: avro")("no-union-typedef,U", "do not generate typedefs for unions in records")("namespace,n", po::value<string>(), "set namespace for generated code")("input,i", po::value<string>(), "input file")("output,o", po::value<string>(), "output file to generate");
 
     po::variables_map vm;
     po::store(po::parse_command_line(argc, argv, desc), vm);
     po::notify(vm);
 
-    if (vm.count(IN_FILE) == 0 || vm.count(OUT_FILE) == 0) {
+    if (vm.count("help")) {
         std::cout << desc << std::endl;
-        return 1;
+        return 0;
     }
 
-    if (vm.count("help")) {
-        std::cout << desc << std::endl;
+    if (vm.count("version")) {
+        std::cout << AVRO_VERSION << std::endl;
         return 0;
     }
 
+    if (vm.count(IN_FILE) == 0 || vm.count(OUT_FILE) == 0) {
+        std::cout << desc << std::endl;
+        return 1;
+    }
+
     string ns = vm.count(NS) > 0 ? vm[NS].as<string>() : string();
     string outf = vm.count(OUT_FILE) > 0 ? vm[OUT_FILE].as<string>() : string();
     string inf = vm.count(IN_FILE) > 0 ? vm[IN_FILE].as<string>() : string();

lang/csharp/src/apache/codegen/Avro.codegen.csproj

@@ -26,10 +26,9 @@
     unless framework is explicitly specified with 'dotnet tool install'
     https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-tool-install
     -->
-    <TargetFrameworks>netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>$(DefaultExeTargetFrameworks)</TargetFrameworks>
     <AssemblyName>avrogen</AssemblyName>
     <RootNamespace>Avro.codegen</RootNamespace>
-    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\..\..\Avro.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>

lang/csharp/src/apache/codegen/AvroGen.cs

@@ -17,7 +17,8 @@
  */
 using System;
 using System.Collections.Generic;
-using System.Text;
+using System.Linq;
+using System.Reflection;
 
 namespace Avro
 {
@@ -39,6 +40,13 @@ static int Main(string[] args)
                 return 0;
             }
 
+            if (args.Contains("--version"))
+            {
+                // Print version information
+                Console.WriteLine(Assembly.GetEntryAssembly().GetCustomAttribute<AssemblyInformationalVersionAttribute>().InformationalVersion);
+                return 0;
+            }
+
             // Parse command line arguments
             bool? isProtocol = null;
             string inputFile = null;
@@ -135,10 +143,11 @@ static void Usage()
                 "  avrogen -p <protocolfile> <outputdir> [--namespace <my.avro.ns:my.csharp.ns>]\n" +
                 "  avrogen -s <schemafile> <outputdir> [--namespace <my.avro.ns:my.csharp.ns>]\n\n" +
                 "Options:\n" +
-                "  -h --help   Show this screen.\n" +
-                "  --namespace Map an Avro schema/protocol namespace to a C# namespace.\n" +
-                "              The format is \"my.avro.namespace:my.csharp.namespace\".\n" +
-                "              May be specified multiple times to map multiple namespaces.\n",
+                "  -h --help        Show this screen.\n" +
+                "  -V --version     Show version.\n" +
+                "  --namespace      Map an Avro schema/protocol namespace to a C# namespace.\n" +
+                "                   The format is \"my.avro.namespace:my.csharp.namespace\".\n" +
+                "                   May be specified multiple times to map multiple namespaces.\n",
                 AppDomain.CurrentDomain.FriendlyName);
             return;
         }