On 12/3/2024 6:07 PM, Stephen Hemminger wrote:
On Tue, 3 Dec 2024 11:25:00 +0000 Anatoly Burakov <anatoly.bura...@intel.com> wrote:+ +def check_installed(program: str, package: str) -> None: + """Check if a program is installed.""" + if subprocess.call( + ["which", program], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL + ): + raise DevbindError(f"'{program}' not found - please install '{package}'.") +Apparently the posix way to do this is to use command -v not "which" command [-pVv] command [arg ...] Run command with args suppressing the normal shell function lookup. Only builtin commands or commands found in the PATH are executed. If the -p option is given, the search for command is performed using a default value for PATH that is guaranteed to find all of the standard utilities. If either the -V or -v op‐ tion is supplied, a description of command is printed. The -v option causes a single word indicating the command or filename used to invoke command to be displayed; the -V option produces a more verbose description. If the -V or -v option is supplied, the exit status is 0 if command was found, and 1 if not. If nei‐ ther option is supplied and an error occurred or command cannot be found, the exit status is 127. Otherwise, the exit status of the command builtin is the exit status of command.
Yes but that's for shell, it is not accessible from Python. Well, it wouldn't be unless you're suggesting calling into bash and running `command -v`?
-- Thanks, Anatoly
