From 039effb3446bdc14f7153c6b73863303b6f0ff33 Mon Sep 17 00:00:00 2001
From: Christian Zimmermann <christian.zimmermann@ur.de>
Date: Wed, 22 Feb 2023 02:38:51 +0100
Subject: [PATCH] add config binary

---
 CMakeLists.txt            | 13 ++++++++++
 src/CMakeLists.txt        |  1 +
 src/bin/CMakeLists.txt    |  6 +++++
 src/bin/config.cc         | 52 +++++++++++++++++++++++++++++++++++++++
 src/include/base/base.h   |  1 +
 src/include/base/config.h | 20 +++++++++++++++
 src/lib/CMakeLists.txt    |  1 +
 src/lib/base/config.cc    | 23 +++++++++++++++++
 8 files changed, 117 insertions(+)
 create mode 100644 src/bin/CMakeLists.txt
 create mode 100644 src/bin/config.cc
 create mode 100644 src/include/base/config.h
 create mode 100644 src/lib/base/config.cc

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 24e17db..1af5b25 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,15 @@ cmake_minimum_required(VERSION 3.0)
   
 project(cnorxz)
 
+execute_process(COMMAND bash "-c" "git rev-parse HEAD" OUTPUT_VARIABLE GIT_HASH OUTPUT_STRIP_TRAILING_WHITESPACE)
+execute_process(COMMAND bash "-c" "git tag -l --sort=refname v* | tail -n1" OUTPUT_VARIABLE GIT_TAG OUTPUT_STRIP_TRAILING_WHITESPACE)
+execute_process(COMMAND bash "-c" "git rev-parse ${GIT_TAG}" OUTPUT_VARIABLE GIT_TAG_HASH OUTPUT_STRIP_TRAILING_WHITESPACE)
+string(SUBSTRING ${GIT_TAG} 1 -1 VERSION)
+if(NOT ${GIT_HASH} EQUAL ${GIT_TAG_HASH})
+  string(SUBSTRING ${GIT_HASH} 0 7 GIT_HASH_SHORT)
+  set(VERSION "${VERSION}-${GIT_HASH_SHORT}")
+endif()
+
 if(CMAKE_COMPILER_IS_GNUCXX)
   if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 7.0)
     message(FATAL_ERROR "require gcc version >= 7.0")
@@ -42,4 +51,8 @@ else()
   set(ENABLE_hdf5 TRUE CACHE BOOL "enable hdf5")
 endif()
 
+add_definitions(-DVERSION="${VERSION}")
+add_definitions(-DGIT_COMMIT="${GIT_HASH}")
+add_definitions(-DCXX_FLAGS="${CMAKE_CXX_FLAGS}")
+
 add_subdirectory(src)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d5dc42f..04789ca 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -2,6 +2,7 @@
 include_directories(${CMAKE_SOURCE_DIR}/src/include)
 add_subdirectory(tests)
 add_subdirectory(lib)
+add_subdirectory(bin)
 
 if(ENABLE_hdf5)
   add_subdirectory(opt/hdf5)
diff --git a/src/bin/CMakeLists.txt b/src/bin/CMakeLists.txt
new file mode 100644
index 0000000..e033785
--- /dev/null
+++ b/src/bin/CMakeLists.txt
@@ -0,0 +1,6 @@
+
+add_executable(cnorxz-config config.cc)
+add_dependencies(cnorxz-config cnorxz)
+target_link_libraries(cnorxz-config cnorxz)
+
+install(TARGETS cnorxz-config RUNTIME DESTINATION ${INSTALL_PATH}/bin)
diff --git a/src/bin/config.cc b/src/bin/config.cc
new file mode 100644
index 0000000..ad18459
--- /dev/null
+++ b/src/bin/config.cc
@@ -0,0 +1,52 @@
+
+#include <cstdlib>
+#include <iostream>
+#include <map>
+#include <functional>
+#include "base/config.h"
+
+using CNORXZ::String;
+using CNORXZ::SizeT;
+typedef std::map<String,std::function<String(void)>> CMapT;
+
+auto configMap()
+{
+    CMapT m;
+    m["--version"] = CNORXZ::Config::version;
+    m["--commit"] = CNORXZ::Config::commit;
+    m["--flags"] = CNORXZ::Config::flags;
+    return m;
+}
+
+void printUsage(const String& prog, const CMapT& cm)
+{
+    std::cout << "usage: " << prog << " ";
+    for(const auto& x: cm){
+	std::cout << "[" << x.first << "] ";
+    }
+    std::cout << std::endl;
+}
+
+int main(int argc, char** argv)
+{
+    const String prog(argv[0]);
+    const auto cm = configMap();
+    if(argc == 1){
+	printUsage(prog, cm);
+    }
+    try {
+	for(SizeT i = 1; i != static_cast<SizeT>(argc); ++i){
+	    std::cout << cm.at( String(argv[i]) )() << std::endl;
+	}
+    }
+    catch(const std::out_of_range& e){
+	std::cerr << "caught exception: " << e.what() << std::endl;
+	printUsage(prog, cm);
+	return 1;
+    }
+    catch(...){
+	std::cerr << "caught generic exception" << std::endl;
+    }
+    
+    return 0;
+}
diff --git a/src/include/base/base.h b/src/include/base/base.h
index f5630af..033801f 100644
--- a/src/include/base/base.h
+++ b/src/include/base/base.h
@@ -25,6 +25,7 @@
 #include "isq.h"
 #include "iter.h"
 #include "uuid.h"
+#include "config.h"
 
 #include "base.cc.h"
 
diff --git a/src/include/base/config.h b/src/include/base/config.h
new file mode 100644
index 0000000..58859ab
--- /dev/null
+++ b/src/include/base/config.h
@@ -0,0 +1,20 @@
+
+#ifndef __cxz_config_h__
+#define __cxz_config_h__
+
+#include <cstdlib>
+#include "base/types.h"
+
+namespace CNORXZ
+{
+    namespace Config
+    {
+	String version();
+
+	String commit();
+
+	String flags();
+    }
+}
+
+#endif
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 453861a..6389903 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -2,6 +2,7 @@
 set(libcnorxz_a_SOURCES
   ${CMAKE_SOURCE_DIR}/src/lib/base/to_string.cc
   ${CMAKE_SOURCE_DIR}/src/lib/base/uuid.cc
+  ${CMAKE_SOURCE_DIR}/src/lib/base/config.cc
   ${CMAKE_SOURCE_DIR}/src/lib/memory/memcount.cc
   ${CMAKE_SOURCE_DIR}/src/lib/ranges/range_base.cc
   ${CMAKE_SOURCE_DIR}/src/lib/ranges/yrange.cc
diff --git a/src/lib/base/config.cc b/src/lib/base/config.cc
new file mode 100644
index 0000000..f13756a
--- /dev/null
+++ b/src/lib/base/config.cc
@@ -0,0 +1,23 @@
+
+#include "base/config.h"
+
+namespace CNORXZ
+{
+    namespace Config
+    {
+	String version()
+	{
+	    return String(VERSION);
+	}
+
+	String commit()
+	{
+	    return String(GIT_COMMIT);
+	}
+
+	String flags()
+	{
+	    return String(CXX_FLAGS);
+	}
+    }
+}