From cbc6775756dff50286c97d95839822d94d016ac0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Du=C5=A1an=20Poizl?= <nou.spiro@gmail.com>
Date: Sun, 24 Apr 2022 13:30:51 +0200
Subject: [PATCH] Add version to About dialog

---
 CMakeLists.txt   | 12 +++++++++++-
 about.cpp        |  5 ++++-
 about/tenmon     |  2 +-
 gitversion.cmake | 19 +++++++++++++++++++
 gitversion.h.in  |  6 ++++++
 5 files changed, 41 insertions(+), 3 deletions(-)
 create mode 100644 gitversion.cmake
 create mode 100644 gitversion.h.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 868613f..2c95b7d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,7 +50,7 @@ endif()
 add_executable(tenmon WIN32 ${TENMON_SRC})
 
 find_path(FITS_INCLUDE fitsio2.h PATH_SUFFIXES cfitsio REQUIRED)
-target_include_directories(tenmon PRIVATE ${OpenCV_INCLUDE_DIRS} ${FITS_INCLUDE} 3rdparty/include)
+target_include_directories(tenmon PRIVATE ${OpenCV_INCLUDE_DIRS} ${FITS_INCLUDE} 3rdparty/include ${CMAKE_BINARY_DIR})
 
 if(WIN32)
     target_link_directories(tenmon PRIVATE 3rdparty/lib/Windows)
@@ -81,3 +81,13 @@ if(UNIX)
         endif()
     endif()
 endif(UNIX)
+
+option(RELEASE_BUILD "Release build" OFF)
+if(RELEASE_BUILD)
+    add_custom_target(tenmon_version COMMAND ${CMAKE_COMMAND} -Dlocal_dir="${CMAKE_CURRENT_SOURCE_DIR}" -Doutput_dir="${CMAKE_CURRENT_BINARY_DIR}"
+        -P "${CMAKE_CURRENT_SOURCE_DIR}/gitversion.cmake")
+    add_dependencies(tenmon tenmon_version)
+else()
+    execute_process(COMMAND ${CMAKE_COMMAND} -Dlocal_dir=${CMAKE_CURRENT_SOURCE_DIR} -Doutput_dir=${CMAKE_CURRENT_BINARY_DIR}
+        -P "${CMAKE_CURRENT_SOURCE_DIR}/gitversion.cmake")
+endif()
diff --git a/about.cpp b/about.cpp
index 99a7298..2d54068 100644
--- a/about.cpp
+++ b/about.cpp
@@ -4,6 +4,7 @@
 #include <QVBoxLayout>
 #include <QDialogButtonBox>
 #include <QFile>
+#include "gitversion.h"
 
 About::About(QWidget *parent) : QDialog(parent)
 {
@@ -14,7 +15,9 @@ About::About(QWidget *parent) : QDialog(parent)
 
     QFile tenmonText(":/about/tenmon");
     tenmonText.open(QIODevice::ReadOnly);
-    label->setText(tenmonText.readAll());
+    QByteArray text = tenmonText.readAll();
+    text.replace("@GITVERSION@", GITVERSION);
+    label->setText(text);
     label->setOpenExternalLinks(true);
 
     QTextEdit *pcl = new QTextEdit(this);
diff --git a/about/tenmon b/about/tenmon
index e768d5f..c3e1d7f 100644
--- a/about/tenmon
+++ b/about/tenmon
@@ -2,7 +2,7 @@
 <td style="padding-right:10px"><img src=":/org.nou.tenmon.png"></td>
 <td><h3>Tenmon</h3>
 Tenmon is FITS/XISF image viewer and converter. It also index FITS keywords.<br>
-Copyright © 2022 Dušan Poizl<br><br>
+v@GITVERSION@ Copyright © 2022 Dušan Poizl<br><br>
 
 This program is free software: you can redistribute it and/or modify<br>
 it under the terms of the GNU General Public License as published by<br>
diff --git a/gitversion.cmake b/gitversion.cmake
new file mode 100644
index 0000000..1b27b56
--- /dev/null
+++ b/gitversion.cmake
@@ -0,0 +1,19 @@
+set(_build_version "unknown")
+
+find_package(Git)
+if(GIT_FOUND)
+  execute_process(
+    COMMAND ${GIT_EXECUTABLE} describe --tags HEAD
+    WORKING_DIRECTORY "${local_dir}"
+    OUTPUT_VARIABLE _build_version
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+  message(STATUS "GIT hash: ${_build_version}")
+else()
+  message(STATUS "GIT not found")
+endif()
+
+message(STATUS "local:${local_dir} output:${output_dir}")
+
+configure_file("${local_dir}/gitversion.h.in" "${output_dir}/gitversion.h" @ONLY)
diff --git a/gitversion.h.in b/gitversion.h.in
new file mode 100644
index 0000000..85f3b36
--- /dev/null
+++ b/gitversion.h.in
@@ -0,0 +1,6 @@
+#ifndef GITVERSION_H
+#define GITVERSION_H
+
+#define GITVERSION "@_build_version@"
+
+#endif