added --version switch to pull both github and CMake version information as well as log the Version info into the log file

CMakeLists.txt

@@ -22,7 +22,20 @@
 ########################################################################
 
 cmake_minimum_required(VERSION 3.2)
-project(Trunk-Recorder CXX C)
+project(Trunk-Recorder LANGUAGES CXX C VERSION "4.3.2")
+
+configure_file(cmake.h.in "${PROJECT_SOURCE_DIR}/cmake.h" @ONLY)
+
+# Define the two required variables before including
+# the source code for watching a git repository.
+set(PRE_CONFIGURE_FILE "git.cc.in")
+set(POST_CONFIGURE_FILE "${CMAKE_CURRENT_BINARY_DIR}/git.cc")
+include(git_watcher.cmake)
+
+# Create a library out of the compiled post-configure file.
+add_library(git ${POST_CONFIGURE_FILE})
+target_include_directories(git PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+add_dependencies(git check_git)
 
 # Select the release build type by default to get optimization flags
 if(NOT CMAKE_BUILD_TYPE)
@@ -324,7 +337,7 @@ add_subdirectory(plugins/simplestream)
 
 add_executable(trunk-recorder trunk-recorder/main.cc ${trunk_recorder_sources})
 
-target_link_libraries(trunk-recorder trunk_recorder_library gnuradio-op25_repeater   ${CMAKE_DL_LIBS} ssl crypto ${CURL_LIBRARIES} ${Boost_LIBRARIES} ${GNURADIO_PMT_LIBRARIES} ${GNURADIO_RUNTIME_LIBRARIES} ${GNURADIO_FILTER_LIBRARIES} ${GNURADIO_DIGITAL_LIBRARIES} ${GNURADIO_ANALOG_LIBRARIES} ${GNURADIO_AUDIO_LIBRARIES} ${GNURADIO_UHD_LIBRARIES} ${UHD_LIBRARIES} ${GNURADIO_BLOCKS_LIBRARIES} ${GNURADIO_OSMOSDR_LIBRARIES}  ) # gRPC::grpc++_reflection protobuf::libprotobuf)
+target_link_libraries(trunk-recorder git trunk_recorder_library gnuradio-op25_repeater   ${CMAKE_DL_LIBS} ssl crypto ${CURL_LIBRARIES} ${Boost_LIBRARIES} ${GNURADIO_PMT_LIBRARIES} ${GNURADIO_RUNTIME_LIBRARIES} ${GNURADIO_FILTER_LIBRARIES} ${GNURADIO_DIGITAL_LIBRARIES} ${GNURADIO_ANALOG_LIBRARIES} ${GNURADIO_AUDIO_LIBRARIES} ${GNURADIO_UHD_LIBRARIES} ${UHD_LIBRARIES} ${GNURADIO_BLOCKS_LIBRARIES} ${GNURADIO_OSMOSDR_LIBRARIES}  ) # gRPC::grpc++_reflection protobuf::libprotobuf)
 
 message(STATUS "All libraries:" ${GNURADIO_ALL_LIBRARIES})
 if(NOT Gnuradio_VERSION VERSION_LESS "3.8")

cmake.h

@@ -0,0 +1,10 @@
+#ifndef INCLUDE_GUARD
+#define INCLUDE_GUARD
+
+#define PROJECT_NAME "Trunk-Recorder"
+#define PROJECT_VER  "4.3.2"
+#define PROJECT_VER_MAJOR "4"
+#define PROJECT_VER_MINOR "3"
+#define PTOJECT_VER_PATCH "2"
+
+#endif // INCLUDE_GUARD

cmake.h.in

@@ -0,0 +1,10 @@
+#ifndef INCLUDE_GUARD
+#define INCLUDE_GUARD
+
+#define PROJECT_NAME "@PROJECT_NAME@"
+#define PROJECT_VER  "@PROJECT_VERSION@"
+#define PROJECT_VER_MAJOR "@PROJECT_VERSION_MAJOR@"
+#define PROJECT_VER_MINOR "@PROJECT_VERSION_MINOR@"
+#define PTOJECT_VER_PATCH "@PROJECT_VERSION_PATCH@"
+
+#endif // INCLUDE_GUARD

git.cc.in

@@ -0,0 +1,56 @@
+#include <cstdlib>
+#include <iostream>
+
+#include "git.h"
+#include "cmake.h"
+
+const char *version = "version info:\n";
+
+bool GitMetadata::Populated() {
+    return @GIT_RETRIEVED_STATE@;
+}
+bool GitMetadata::AnyUncommittedChanges() {
+    return @GIT_IS_DIRTY@;
+}
+std::string GitMetadata::AuthorName() {
+    return "@GIT_AUTHOR_NAME@";
+}
+std::string GitMetadata::AuthorEmail() {
+    return "@GIT_AUTHOR_EMAIL@";
+}
+std::string GitMetadata::CommitSHA1() {
+    return "@GIT_HEAD_SHA1@";
+}
+std::string GitMetadata::CommitDate() {
+    return "@GIT_COMMIT_DATE_ISO8601@";
+}
+std::string GitMetadata::CommitSubject() {
+    return "@GIT_COMMIT_SUBJECT@";
+}
+std::string GitMetadata::CommitBody() {
+    return "@GIT_COMMIT_BODY@";
+}
+std::string GitMetadata::Describe() {
+    return "@GIT_DESCRIBE@";
+}
+std::string GitMetadata::Branch() {
+    return "@GIT_BRANCH@";
+}
+void GitMetadata::VersionInfo() {
+   std::cout << PROJECT_NAME << ": " << PROJECT_VER << std::endl;
+
+   if(GitMetadata::Populated()) {
+        if(GitMetadata::AnyUncommittedChanges()) {
+            std::cerr << "\t" << "WARN: there were uncommitted changes at build-time." << std::endl;
+        }
+        std::cout << "\t" << "commit " << GitMetadata::CommitSHA1() << " (" << GitMetadata::Branch() << ")\n"
+                  << "\t" << "describe " << GitMetadata::Describe() << "\n"
+                  << "\t" << "Author: " << GitMetadata::AuthorName() << " <" << GitMetadata::AuthorEmail() << ">\n"
+                  << "\t" << "Date: " << GitMetadata::CommitDate() << "\n\n"
+                  << "\t" << GitMetadata::CommitSubject() << "\n" << GitMetadata::CommitBody() << std::endl;
+    }
+    else {
+        std::cerr << "WARN: failed to get the current git state. Is this a git repo?" << std::endl;
+    }
+}
+

git.h

@@ -0,0 +1,33 @@
+#pragma once
+#include <string>
+
+class GitMetadata {
+public:
+  // Is the metadata populated? We may not have metadata if
+  // there wasn't a .git directory (e.g. downloaded source
+  // code without revision history).
+  static bool Populated();
+
+  // Were there any uncommitted changes that won't be reflected
+  // in the CommitID?
+  static bool AnyUncommittedChanges();
+
+  // The commit author's name.
+  static std::string AuthorName();
+  // The commit author's email.
+  static std::string AuthorEmail();
+  // The commit SHA1.
+  static std::string CommitSHA1();
+  // The ISO8601 commit date.
+  static std::string CommitDate();
+  // The commit subject.
+  static std::string CommitSubject();
+  // The commit body.
+  static std::string CommitBody();
+  // The commit describe.
+  static std::string Describe();
+  // The symbolic reference tied to HEAD.
+  static std::string Branch();
+  // dump
+  static void VersionInfo();
+};