BC: Add output file path argument

[andreas-hilti]

Allow to specify the output file path to which the SBOM is written on the command line, e.g.
cyclonedx-conan -l conan.lock conanfile.txt --output sbom.json

[andreas-hilti]

@coderpatros @codetent This might address #52.

[jkowalleck]

could you also change the logs to be sent to stdError instead of stdOut?

[andreas-hilti]

could you also change the logs to be sent to stdError instead of stdOut?

I haven't managed to sent it to stdError; all that I managed was to suppress it completely by setting quiet=True as an additional argument for the info command.

[andreas-hilti]

@jkowalleck If we were to initialize the conan_api differently, say:

from conans.client.output import ConanOutput
conan_api = Conan(output=ConanOutput(sys.stderr, sys.stderr, None))

then we could redirect all the output to stderr; however, I'm not sure about side effects (even though I don't see any).

[jkowalleck]

then we could redirect all the output to stderr; however, I'm not sure about side effects (even though I don't see any).

lets do this :-)
could you add the needed changes?

we could redirect logs to stdErr, have SBOM on stdOut, and then push a new major version and describe these breaking changes in the changelog.
I see no problem, workflow-wise.

[andreas-hilti]

lets do this :-) could you add the needed changes?

@jkowalleck I have added this change.