| import os | |
| import subprocess | |
| def have_needed_diff_support(): | |
| if not os.path.exists("/usr/bin/diff"): | |
| return False | |
| ld_cmd = subprocess.Popen( | |
| ["/usr/bin/diff", "--help"], | |
| stdout=subprocess.PIPE, | |
| stderr=subprocess.STDOUT, | |
| env={"LANG": "C"}, | |
| ) | |
| ld_out = ld_cmd.stdout.read().decode() | |
| ld_cmd.wait() | |
| return "-line-format" in ld_out | |
| if not have_needed_diff_support(): | |
| config.unsupported = True |