feat(Pipeline): Add version

Used to specify a version, get the value with --version, and output in
the interface JSON for a consistent version across bindgen packages.

Author: thewtex

include/itkPipeline.h

@@ -50,6 +50,11 @@
               (pipeline).interface_json(); \
               std::exit(0); \
             } \
+            if (arg == "--version") \
+            { \
+              std::cout << "Version: " << (pipeline).get_version() << std::endl; \
+              std::exit(0); \
+            } \
           } \
         (pipeline).parse(); \
     } catch(const CLI::ParseError &e) { \
@@ -159,13 +164,24 @@ class WebAssemblyInterface_EXPORT Pipeline: public CLI::App
       return m_argv;
     }
 
+    const std::string& get_version() const
+    {
+      return m_Version;
+    }
+
+    void set_version(const char * version)
+    {
+      m_Version = version;
+    }
+
     void interface_json();
 
     ~Pipeline() override;
 private:
     static bool m_UseMemoryIO;
     int m_argc;
     char **m_argv;
+    std::string m_Version;
 };
 
 

include/itkSupportInputImageTypes.h

@@ -106,7 +106,7 @@ SupportInputImageTypes
     for (int ii = 0; ii < iwpArgc; ++ii)
       {
         const std::string arg(iwpArgv[ii]);
-        if (arg == "-h" || arg == "--help" || arg == "--interface-json")
+        if (arg == "-h" || arg == "--help" || arg == "--interface-json" || arg == "--version")
         {
           passThrough = true;
         }

include/itkSupportInputMeshTypes.h

@@ -108,7 +108,7 @@ SupportInputMeshTypes
     for (int ii = 0; ii < iwpArgc; ++ii)
       {
         const std::string arg(iwpArgv[ii]);
-        if (arg == "-h" || arg == "--help" || arg == "--interface-json")
+        if (arg == "-h" || arg == "--help" || arg == "--interface-json" || arg == "--version")
         {
           passThrough = true;
         }

include/itkSupportInputPolyDataTypes.h

@@ -103,7 +103,7 @@ SupportInputPolyDataTypes
     for (int ii = 0; ii < iwpArgc; ++ii)
       {
         const std::string arg(iwpArgv[ii]);
-        if (arg == "-h" || arg == "--help" || arg == "--interface-json")
+        if (arg == "-h" || arg == "--help" || arg == "--interface-json" || arg == "--version")
         {
           passThrough = true;
         }

src/itkPipeline.cxx

@@ -33,13 +33,16 @@ Pipeline
 ::Pipeline(std::string name, std::string description, int argc, char **argv):
   App(description, name),
   m_argc(argc),
-  m_argv(argv)
+  m_argv(argv),
+  m_Version("0.1.0")
 {
   this->footer("Enjoy ITK!");
 
   this->positionals_at_end(false);
 
   this->add_flag("--memory-io", m_UseMemoryIO, "Use itk-wasm memory IO")->group("");
+  this->add_flag("--version", m_Version, "Output pipeline version")->group("");
+
   // Set m_UseMemoryIO before it is used by other memory parsers
   this->preparse_callback([this](size_t arg)
    {
@@ -295,6 +298,10 @@ ::interface_json()
   name.SetString(this->get_name().c_str(), allocator);
   document.AddMember("name", name.Move(), allocator);
 
+  rapidjson::Value version;
+  version.SetString(this->get_version().c_str(), allocator);
+  document.AddMember("version", version.Move(), allocator);
+
   rapidjson::Value inputs(rapidjson::kArrayType);
   rapidjson::Value outputs(rapidjson::kArrayType);
   rapidjson::Value parameters(rapidjson::kArrayType);

test/itkPipelineTest.cxx

@@ -36,6 +36,7 @@ int
 itkPipelineTest(int argc, char * argv[])
 {
   itk::wasm::Pipeline pipeline("pipeline-test", "A test ITK Wasm Pipeline", argc, argv);
+  pipeline.set_version("10.8.1");
 
   std::string example_string_option = "default";
   pipeline.add_option("-s,--string", example_string_option, "A help string");