From 415c09748934637332b90d2dddedfb56603bc152 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anna=20=E2=80=9CCyberTailor=E2=80=9D?= <cyber@sysrq.in>
Date: Mon, 21 Feb 2022 11:54:14 +0500
Subject: [PATCH] CMakeLists.txt: use git only when in repository

Allow building fastfetch from tarballs with -DPROJECT_VERSION and
-DPROJECT_VERSION_MAJOR options.
---
 CMakeLists.txt | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c425e98b4..843ebdd7a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,21 +24,25 @@ endif()
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wconversion")
 set(CMAKE_EXE_LINKER_FLAGS_RELEASE "-Wl,-O3")
 
-execute_process(
-    COMMAND git rev-list --count HEAD
-    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
-    OUTPUT_VARIABLE GIT_REV_LIST
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-)
-execute_process(
-    COMMAND git rev-parse --short HEAD
-    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
-    OUTPUT_VARIABLE GIT_REV_PARSE
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-)
+set(PROJECT_VERSION "r0.0" CACHE STRING "Full version")
+set(PROJECT_VERSION_MAJOR "0" CACHE STRING "Major version")
+if (EXISTS "${CMAKE_SOURCE_DIR}/.git")
+    execute_process(
+        COMMAND git rev-list --count HEAD
+        WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+        OUTPUT_VARIABLE GIT_REV_LIST
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    execute_process(
+        COMMAND git rev-parse --short HEAD
+        WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+        OUTPUT_VARIABLE GIT_REV_PARSE
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
 
-set(PROJECT_VERSION "r${GIT_REV_LIST}.${GIT_REV_PARSE}")
-set(PROJECT_VERSION_MAJOR "${GIT_REV_LIST}")
+    set(PROJECT_VERSION "r${GIT_REV_LIST}.${GIT_REV_PARSE}")
+    set(PROJECT_VERSION_MAJOR "${GIT_REV_LIST}")
+endif()
 
 function(fastfetch_load_text FILENAME OUTVAR)
     file(READ "${FILENAME}" TEMP)