meson.build: Fix the evaluation of is_git_build on Windows

kjellahl · kjellahl · commit c65a8831c57c · 2023-01-04T10:59:26.000+01:00
See gtkmm#131
diff --git a/meson.build b/meson.build
@@ -47,12 +47,17 @@ python3 = find_program('python3', version: '>=3.5')
 # Suppose we do if and only if the meson.build file is tracked by git.
 cmd_py = '''
 import shutil, subprocess, sys
-if not shutil.which('git'):
+git_exe = shutil.which('git')
+if not git_exe:
   sys.exit(1)
-cmd = [ 'git', 'ls-files', '--error-unmatch', 'meson.build' ]
-sys.exit(subprocess.run(cmd, cwd="@0@", stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL).returncode)
-'''.format(project_source_root)
-is_git_build = run_command(python3, '-c', cmd_py, check: false).returncode() == 0
+cmd = [ git_exe, 'ls-files', '--error-unmatch', 'meson.build' ]
+sys.exit(subprocess.run(cmd, cwd=sys.argv[1], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL).returncode)
+'''
+is_git_build = run_command(
+  python3, '-c', cmd_py,
+  project_source_root,
+  check: false,
+).returncode() == 0
 
 # Are we testing a dist tarball while it's being built?
 # There ought to be a better way. https://github.com/mesonbuild/meson/issues/6866
