Merge pull request #110 from wravery/master

Update to v3.2.3 and keep the version in sync with release tags

Author: wravery

CMakeLists.txt

@@ -2,7 +2,30 @@
 # Licensed under the MIT License.
 
 cmake_minimum_required(VERSION 3.8.2)
-project(cppgraphqlgen VERSION 3.2.0)
+
+# Default to the last updated version from version.txt.
+file(TO_CMAKE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/version.txt" VERSION_FILE)
+file(READ "${VERSION_FILE}" LATEST_VERSION)
+
+if(IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/.git")
+  # Get the latest release tag from git if possible.
+  execute_process(COMMAND git describe --tags --long
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    OUTPUT_VARIABLE LATEST_VERSION_TAG
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+  if(LATEST_VERSION_TAG MATCHES "^v([0-9]+\\.[0-9]+\\.[0-9]+)-[0-9]+-[0-9a-z]+$"
+    AND CMAKE_MATCH_1 VERSION_GREATER LATEST_VERSION)
+    # The latest tag matched the pattern we expected and it's newer, so use that as the latest version.
+    set(LATEST_VERSION "${CMAKE_MATCH_1}")
+
+    # Update version.txt so source archives without the release tags still get the same version.
+    file(WRITE "${VERSION_FILE}" "${LATEST_VERSION}")
+  endif()
+endif()
+
+project(cppgraphqlgen VERSION ${LATEST_VERSION})
 
 set(CMAKE_CXX_STANDARD 17)
 

cmake/version.txt

@@ -0,0 +1 @@
+3.2.3