Add --version

src/cpp/CMakeLists.txt

@@ -5,6 +5,8 @@ project(piper C CXX)
 find_package(PkgConfig)
 pkg_check_modules(SPDLOG REQUIRED spdlog)
 
+file(READ "${CMAKE_CURRENT_LIST_DIR}/../../VERSION" piper_version)
+
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
@@ -35,3 +37,5 @@ target_include_directories(piper PUBLIC
 
 target_compile_options(piper PUBLIC
                        ${SPDLOG_CFLAGS_OTHER})
+
+target_compile_definitions(piper PUBLIC _PIPER_VERSION=${piper_version})

src/cpp/main.cpp

@@ -70,9 +70,10 @@ struct RunConfig {
 
   // stdin input is lines of JSON instead of text with format:
   // {
-  //   "text": "...",             (required)
+  //   "text": str,               (required)
   //   "speaker_id": int,         (optional)
-  //   "output_file": "...",      (optional)
+  //   "speaker": str,            (optional)
+  //   "output_file": str,        (optional)
   // }
   bool jsonInput = false;
 };
@@ -454,6 +455,9 @@ void parseArgs(int argc, char *argv[], RunConfig &runConfig) {
       runConfig.tashkeelModelPath = filesystem::path(argv[++i]);
     } else if (arg == "--json_input" || arg == "--json-input") {
       runConfig.jsonInput = true;
+    } else if (arg == "--version") {
+      std::cout << piper::getVersion() << std::endl;
+      exit(0);
     } else if (arg == "--debug") {
       // Set DEBUG logging
       spdlog::set_level(spdlog::level::debug);

src/cpp/piper.cpp

@@ -16,11 +16,24 @@
 
 namespace piper {
 
+#ifdef _PIPER_VERSION
+// https://stackoverflow.com/questions/47346133/how-to-use-a-define-inside-a-format-string
+#define _STR(x) #x
+#define STR(x) _STR(x)
+const std::string VERSION = STR(_PIPER_VERSION);
+#else
+const std::string VERSION = "";
+#endif
+
 // Maximum value for 16-bit signed WAV sample
 const float MAX_WAV_VALUE = 32767.0f;
 
 const std::string instanceName{"piper"};
 
+std::string getVersion() {
+  return VERSION;
+}
+
 // True if the string is a single UTF-8 codepoint
 bool isSingleCodepoint(std::string s) {
   return utf8::distance(s.begin(), s.end()) == 1;

src/cpp/piper.hpp

@@ -89,6 +89,9 @@ struct Voice {
   ModelSession session;
 };
 
+// Get version of Piper
+std::string getVersion();
+
 // Must be called before using textTo* functions
 void initialize(PiperConfig &config);