Add option --profile for a specific profile in the AWS credentials file

[bingzhang00]

Tell us more about this new feature.

It would be nice if we can have an option --profile, like in other AWS command-line tools, so that we can choose a specific profile to use from ~/.aws/credentials. Right now it seems the only way to select a different profile is via environment variables, which is also not documented.

Current behavior

./target/release/mount-s3 --profile
error: Found argument '--profile' which wasn't expected, or isn't valid in this context

        If you tried to supply `--profile` as a value rather than a flag, use `-- --profile`

[jamesbornholt]

Thanks! We'll definitely add this. In the meantime, I'll update the documentation so at least it's clear that you can use the AWS_PROFILE environment variable to select a profile.

[ooboyle-rs10]

Latest version has --profile and work well for me. Thank you.