From 3a054c1ffc34af8697d9d74061be5d3203958d40 Mon Sep 17 00:00:00 2001
From: Eric Wasylishen <ewasylishen@gmail.com>
Date: Mon, 14 Aug 2023 00:30:20 -0600
Subject: [PATCH] build: fix build labels on GitHub Actions

---
 CMakeLists.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dfeaece7..d7c1fbdc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,6 +14,17 @@ execute_process(
   OUTPUT_VARIABLE GIT_DESCRIBE
   OUTPUT_STRIP_TRAILING_WHITESPACE
 )
+message(STATUS "git describe returned \"${GIT_DESCRIBE}\"")
+
+# git describe fails on GitHub Actions
+if(NOT GIT_DESCRIBE)
+	# See: https://docs.github.com/en/actions/reference/environment-variables#default-environment-variables
+	if(NOT ("$ENV{GITHUB_REF_NAME}" STREQUAL ""))
+		set(GIT_DESCRIBE "$ENV{GITHUB_REF_NAME}")
+		
+		message(STATUS "using version label \"${GIT_DESCRIBE}\" from GITHUB_REF_NAME")
+	endif()
+endif()
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
 	add_compile_options(/EHsc)