Add a method to find out whether an artifact exists

[janhollevoet]

Add a method that checks whether an artifact exists:

artifact_info = art.artifacts.exists("<ARTIFACT_PATH_IN_ARTIFACTORY>")

Currently, this can be done with the info method, combined with try/except.

[anancarv]

Hi @janhollevoet , This project is a wrapper for the Artifactory API. So we try to follow the API specification. The endpoint for checking whether an artifact exists is not defined within it, so we prefer not to add it. However, as you showed it earlier, it's still possible to perform such a check. I suggest you to write in your code something like that:

try
      artifact_info = art.artifacts.info("<ARTIFACT_PATH_IN_ARTIFACTORY>")
      ....
except ArtifactNotFoundException:
     ...
     log.error("Artifact does not exist")

[bdsoha]

@janhollevoet Is this issue still relevant, or can it be closed?