From 86f4a1c97d7bfe459027d63b8caf8240830fef30 Mon Sep 17 00:00:00 2001
From: prmoore77 <prmoore77@hotmail.com>
Date: Mon, 4 Mar 2024 13:05:22 -0500
Subject: [PATCH] Making application version driven by the git tag

---
 CMakeLists.txt                           | 24 ++++++++++++++++++++++++
 src/library/include/.gitignore           |  1 +
 src/library/include/flight_sql_library.h |  3 ++-
 src/library/include/version.h.in         |  8 ++++++++
 4 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 src/library/include/.gitignore
 create mode 100644 src/library/include/version.h.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 081abf1..16ad708 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,30 @@ project(flight_sql)
 
 set(CMAKE_CXX_STANDARD 17)
 
+# Function to retrieve the latest Git tag
+function(get_latest_git_tag OUTPUT_VARIABLE)
+    execute_process(
+            COMMAND git describe --tags --abbrev=0
+            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+            OUTPUT_VARIABLE RETURN_VALUE
+            OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    set(${OUTPUT_VARIABLE} ${RETURN_VALUE} PARENT_SCOPE)
+endfunction()
+
+# Set the version
+get_latest_git_tag(LATEST_TAG)
+set(PROJECT_VERSION ${LATEST_TAG})
+
+# Display variable values using message
+message(STATUS "PROJECT_VERSION: ${PROJECT_VERSION}")
+
+# Configure a header file with the version
+configure_file(
+        ${CMAKE_SOURCE_DIR}/src/library/include/version.h.in
+        ${CMAKE_SOURCE_DIR}/src/library/include/version.h
+)
+
 # --------------------- Arrow ---------------------
 configure_file(third_party/Arrow_CMakeLists.txt.in arrow/CMakeLists.txt)
 execute_process(COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
diff --git a/src/library/include/.gitignore b/src/library/include/.gitignore
new file mode 100644
index 0000000..6702033
--- /dev/null
+++ b/src/library/include/.gitignore
@@ -0,0 +1 @@
+version.h
diff --git a/src/library/include/flight_sql_library.h b/src/library/include/flight_sql_library.h
index e453453..4cb7ec0 100644
--- a/src/library/include/flight_sql_library.h
+++ b/src/library/include/flight_sql_library.h
@@ -2,9 +2,10 @@
 #pragma once
 
 #include <filesystem>
+#include "version.h"
 
 // Constants
-const std::string FLIGHT_SQL_SERVER_VERSION = "v1.2.3";  // For now - be sure to update this version with the git tag!  TODO: automate this
+const std::string FLIGHT_SQL_SERVER_VERSION = PROJECT_VERSION;
 const std::string DEFAULT_FLIGHT_HOSTNAME = "0.0.0.0";
 const std::string DEFAULT_FLIGHT_USERNAME = "flight_username";
 const int DEFAULT_FLIGHT_PORT = 31337;
diff --git a/src/library/include/version.h.in b/src/library/include/version.h.in
new file mode 100644
index 0000000..ca73219
--- /dev/null
+++ b/src/library/include/version.h.in
@@ -0,0 +1,8 @@
+// version.h.in
+// This file is used by CMake to generate version.h
+#ifndef PROJECT_VERSION_H
+#define PROJECT_VERSION_H
+
+#define PROJECT_VERSION "@PROJECT_VERSION@"
+
+#endif // PROJECT_VERSION_H