release_tracks: [ALPHA, BETA, GA]
help_text:
  brief: Add an IAM policy binding to a Cloud Bigtable instance.
  description: |
    Add an IAM policy binding to a Cloud Bigtable instance. One binding consists of a member,
    a role, and an optional condition.

  examples: |
    To add an IAM policy binding for the role of `roles/editor` for the user `test-user@gmail.com`
    with instance `my-instance`, run:

      $ {command} my-instance --member=`user:test-user@gmail.com` --role=`roles/editor`

    To add an IAM policy binding which expires at the end of the year 2018 for the role of
    `roles/bigtable.admin` and the user `test-user@gmail.com` with instance `my-instance`, run:

      $ {command} my-instance --member=`user:test-user@gmail.com` --role=`roles/bigtable.admin` --condition=`expression=request.time < timestamp("2019-01-01T00:00:00Z"),title=expires_end_of_2018,description=Expires at midnight on 2018-12-31`

    See https://cloud.google.com/iam/docs/managing-policies for details of
    policy role and member types.

request:
  collection: bigtableadmin.projects.instances

arguments:
  resource:
    help_text: The Cloud Bigtable instance to which to add the IAM policy binding.
    spec: !REF googlecloudsdk.command_lib.bigtable.resources:instance

iam:
  enable_condition: true
  policy_version: 3
  get_iam_policy_version_path: getIamPolicyRequest.options.requestedPolicyVersion