From 2b8395de697ff342679cdb1e84e3e8e3e5390e68 Mon Sep 17 00:00:00 2001
From: King_DuckZ <king_duckz@gmx.com>
Date: Sat, 21 Mar 2020 11:53:04 +0100
Subject: [PATCH] Improve git sha1 detection

---
 meson.build | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/meson.build b/meson.build
index 6ec5a5c..565b0a1 100644
--- a/meson.build
+++ b/meson.build
@@ -9,6 +9,7 @@ if get_option('buildtype').startswith('debug')
   is_debug_build = 1
 endif
 
+git_prog = find_program('git', required: false)
 cpp = meson.get_compiler('cpp')
 
 conf = configuration_data()
@@ -26,12 +27,22 @@ project_config_file = configure_file(
 	output: 'config.h',
 	configuration: conf
 )
-gitrev_config_file = vcs_tag(
-	command: ['git', 'rev-parse', 'HEAD'],
-	input: 'src/git_version.h.in',
-	output: 'git_version.h',
-	fallback: 'n/a'
-)
+if git_prog.found()
+	gitrev_config_file = vcs_tag(
+		command: [git_prog.path(), 'rev-parse', 'HEAD'],
+		input: 'src/git_version.h.in',
+		output: 'git_version.h',
+		fallback: ''
+	)
+else
+	conf = configuration_data()
+	conf.set('VCS_TAG', '')
+	gitrev_config_file = configure_file(
+		input: 'src/git_version.h.in',
+		output: 'git_version.h',
+		configuration: conf
+	)
+endif
 app_config_model = files('src/app_config.h.in')
 
 cxxopts_incl = include_directories('subprojects/cxxopts/include', '.')