Most run_xxx() return stdout and stderr. There's no way, really, for
the caller to get hold of the exit code of the spawned executable. It
can pass throw=true, catch, and assume a non-zero exit status. But
that's not semantically clean, since the spawned function can well be
a test function which is expected to return a non-zero status code,
and the caller might be interested in what code that was, exactly.
The clearest way to solve this is to return the exit code as well.
This commit does that.
Signed-off-by: Jan Lindemann <jan@janware.com>
Make some incomprensible parser error messages if run_curl() returns
nothing slightly less incomprehensible.
Signed-off-by: Jan Lindemann <jan@janware.com>
This is a code maintenance commit: some run_xxx() helper functions
take a string, some a list, and some just digest all arguments and
pass them on as a list to exec() to be executed. That's highly
inconsistent. This commit changes that to list-only.
Except for the run_cmd() method of SSHClient, which is still run as a
shell method, because, erm, it's a shell. Might be changed in the
future for consistency reasons.
Signed-off-by: Jan Lindemann <jan@janware.com>
Replace the boolean parameter "add" with the richer "keep":
- False -> Don't keep anything
- True -> Keep what's in the current environment
- List of strings -> Keep those variables
Signed-off-by: Jan Lindemann <jan@janware.com>
Add a function get_profile_env(), a function returning environment
variables from /etc/profile. Pass add=True to add its contents to the
existing environment dictionary, overwriting old entries, or pass
False to get the pristine content.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add a parameter "output_encoding" to run_cmd(). The parameter allows
the caller to specify if the output encoding should be detected as is
by passing None (the default), if the output should be returned as
undecoded bytes by passing the special string "bytes", or if the
output should be treated as the encoding with the specified name and
decoded to strings.
Signed-off-by: Jan Lindemann <jan@janware.com>
Don't log an Exception as {e} but as str(e) producing nicer output.
Or as repr(e) if a backtrace is requested, because to people who can
read backtraces, type info might be of interest. Also, remove
pointless time stamps, those belong into the logging framework.
Signed-off-by: Jan Lindemann <jan@janware.com>
Move the body of BackendCmd.sudo() into a function. The rationale
behind that is that its functionality is independent of the calling
object for the most part, so having it in a function instead of a
method is the more modular pattern.
Signed-off-by: Jan Lindemann <jan@janware.com>
run_cmd() is synchronous. Now that all commands are asynchronous, we
can await it, so rewrite it to be asynchronous, too.
Other changes:
- Make it return stderr as well in case its needed
- Drop into a pseuto-tty if
- cmd_input == "mode:interactive" or
- cmd_input == "mode:auto" and stdin is a TTY
- Add argument env, defaulting to None. If it's a dict, it will be
the environment the command is run in
This entails making all functions using run_cmd() async, too,
including run_curl(), get_username() and get_password().
Signed-off-by: Jan Lindemann <jan@janware.com>
