gcloud storage buckets set-iam-policy

NAME
gcloud storage buckets set-iam-policy - set the IAM policy for a bucket
SYNOPSIS
gcloud storage buckets set-iam-policy URLS [URLS …] POLICY_FILE [--continue-on-error, -c] [--etag=ETAG, -e ETAG] [GCLOUD_WIDE_FLAG]
DESCRIPTION
Set the IAM policy for a bucket. For more information, see Cloud Identity and Access Management.
EXAMPLES
To set the IAM policy in POLICY-FILE on BUCKET:
gcloud storage buckets set-iam-policy gs://BUCKET POLICY-FILE

To set the IAM policy in POLICY-FILE on all buckets beginning with "b":

gcloud storage buckets set-iam-policy gs://b* POLICY-FILE
POSITIONAL ARGUMENTS
URLS [URLS …]
URLs for buckets to apply the IAM policy to. Can include wildcards.
POLICY_FILE
Path to a local JSON or YAML formatted file containing a valid policy.

The output of the get-iam-policy command is a valid file, as is any JSON or YAML file conforming to the structure of a Policy.

FLAGS
--continue-on-error, -c
If any operations are unsuccessful, the command will exit with a non-zero exit status after completing the remaining operations. This flag takes effect only in sequential execution mode (i.e. processor and thread count are set to 1). Parallelism is default.
--etag=ETAG, -e ETAG
Custom etag to set on IAM policy. API will reject etags that do not match this value, making it useful as a precondition during concurrent operations.
GCLOUD WIDE FLAGS
These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.

Run $ gcloud help for details.

NOTES
This variant is also available:
gcloud alpha storage buckets set-iam-policy