NAME
    gcloud pubsub topics update - updates an existing Cloud Pub/Sub topic

SYNOPSIS
    gcloud pubsub topics update TOPIC [--update-labels=[KEY=VALUE,...]]
        [--clear-labels | --remove-labels=[KEY,...]]
        [--clear-message-retention-duration
          | --message-retention-duration=MESSAGE_RETENTION_DURATION]
        [--clear-schema-settings
          | [--message-encoding=ENCODING (--schema=SCHEMA
          : --schema-project=SCHEMA_PROJECT)
          : --first-revision-id=FIRST_REVISION_ID
          --last-revision-id=LAST_REVISION_ID]]
        [--message-storage-policy-allowed-regions=[REGION,...]
          | --recompute-message-storage-policy]
        [--topic-encryption-key=TOPIC_ENCRYPTION_KEY
          : --topic-encryption-key-keyring=TOPIC_ENCRYPTION_KEY_KEYRING
          --topic-encryption-key-location=TOPIC_ENCRYPTION_KEY_LOCATION
          --topic-encryption-key-project=TOPIC_ENCRYPTION_KEY_PROJECT]
        [GCLOUD_WIDE_FLAG ...]

DESCRIPTION
    Updates an existing Cloud Pub/Sub topic.

EXAMPLES
    To update existing labels on a Cloud Pub/Sub topic, run:

        $ gcloud pubsub topics update mytopic \
          --update-labels=KEY1=VAL1,KEY2=VAL2

    To clear all labels on a Cloud Pub/Sub topic, run:

        $ gcloud pubsub topics update mytopic --clear-labels

    To remove an existing label on a Cloud Pub/Sub topic, run:

        $ gcloud pubsub topics update mytopic --remove-labels=KEY1,KEY2

    To enable customer-managed encryption for a Cloud Pub/Sub topic by
    protecting message data with a Cloud KMS CryptoKey, run:

        $ gcloud pubsub topics update mytopic \
          --topic-encryption-key=projects/PROJECT_ID/locations/\
        KMS_LOCATION/keyRings/KEYRING/cryptoKeys/KEY

    To enable or update retention on a Cloud Pub/Sub topic, run:

        $ gcloud pubsub topics update mytopic \
          --message-retention-duration=MESSAGE_RETENTION_DURATION

    To disable retention on a Cloud Pub/Sub topic, run:

        $ gcloud pubsub topics update mytopic \
          --clear-message-retention-duration

    To update a Cloud Pub/Sub topic's message storage policy, run:

        $ gcloud pubsub topics update mytopic \
          --message-storage-policy-allowed-regions=some-cloud-region1,\
        some-cloud-region2

    To recompute a Cloud Pub/Sub topic's message storage policy based on your
    organization's "Resource Location Restriction" policy, run:

        $ gcloud pubsub topics update mytopic \
          --recompute-message-storage-policy

POSITIONAL ARGUMENTS
     Topic resource - Name of the topic to update. This represents a Cloud
     resource. (NOTE) Some attributes are not given arguments in this group but
     can be set in other ways.

     To set the project attribute:
      ◆ provide the argument topic on the command line with a fully specified
        name;
      ◆ provide the argument --project on the command line;
      ◆ set the property core/project.

     This must be specified.

       TOPIC
          ID of the topic or fully qualified identifier for the topic.

          To set the topic attribute:
          ▸ provide the argument topic on the command line.

FLAGS
     --update-labels=[KEY=VALUE,...]
        List of label KEY=VALUE pairs to update. If a label exists, its value
        is modified. Otherwise, a new label is created.

        Keys must start with a lowercase character and contain only hyphens
        (-), underscores (_), lowercase characters, and numbers. Values must
        contain only hyphens (-), underscores (_), lowercase characters, and
        numbers.

     At most one of these can be specified:

       --clear-labels
          Remove all labels. If --update-labels is also specified then
          --clear-labels is applied first.

          For example, to remove all labels:

              $ gcloud pubsub topics update --clear-labels

          To remove all existing labels and create two new labels, foo and baz:

              $ gcloud pubsub topics update --clear-labels \
                --update-labels foo=bar,baz=qux

       --remove-labels=[KEY,...]
          List of label keys to remove. If a label does not exist it is
          silently ignored. If --update-labels is also specified then
          --update-labels is applied first.

     At most one of these can be specified:

       --clear-message-retention-duration
          If set, clear the message retention duration from the topic.

       --message-retention-duration=MESSAGE_RETENTION_DURATION
          Indicates the minimum duration to retain a message after it is
          published to the topic. If this field is set, messages published to
          the topic in the last MESSAGE_RETENTION_DURATION are always available
          to subscribers. For instance, it allows any attached subscription to
          seek to a timestamp that is up to MESSAGE_RETENTION_DURATION in the
          past. If this field is not set, message retention is controlled by
          settings on individual subscriptions. The minimum is 10 minutes and
          the maximum is 31 days. Valid values are strings of the form
          INTEGER[UNIT], where UNIT is one of "s", "m", "h", and "d" for
          seconds, minutes, hours, and days, respectively. If the unit is
          omitted, seconds is assumed.

     At most one of these can be specified:

       --clear-schema-settings
          If set, clear the Schema Settings from the topic.

       Schema settings. The schema that messages published to this topic must
       conform to and the expected message encoding.

         --message-encoding=ENCODING
            The encoding of messages validated against the schema. ENCODING
            must be one of: json, binary.

            This flag argument must be specified if any of the other arguments
            in this group are specified.

         --first-revision-id=FIRST_REVISION_ID
            The id of the oldest revision allowed for the specified schema.

         --last-revision-id=LAST_REVISION_ID
            The id of the most recent revision allowed for the specified schema

         Schema resource - Name of the schema that messages published to this
         topic must conform to. The arguments in this group can be used to
         specify the attributes of this resource.

         This must be specified.

           --schema=SCHEMA
              ID of the schema or fully qualified identifier for the schema.

              To set the schema attribute:
              ◇ provide the argument --schema on the command line.

              This flag argument must be specified if any of the other
              arguments in this group are specified.

           --schema-project=SCHEMA_PROJECT
              Project ID of the Google Cloud project for the schema.

              To set the project attribute:
              ◇ provide the argument --schema on the command line with a
                fully specified name;
              ◇ provide the argument --schema-project on the command line;
              ◇ provide the argument --project on the command line;
              ◇ set the property core/project.

     Message storage policy options.

     At most one of these can be specified:

       --message-storage-policy-allowed-regions=[REGION,...]
          A list of one or more Cloud regions where messages are allowed to be
          stored at rest.

       --recompute-message-storage-policy
          If given, Cloud Pub/Sub will recompute the regions where messages can
          be stored at rest, based on your organization's "Resource Location
          Restriction" policy.

     Key resource - The Cloud KMS (Key Management Service) cryptokey that will
     be used to protect the topic. The specified Cloud KMS key should have
     purpose set to "ENCRYPT_DECRYPT". The service account,
     "service-${CONSUMER_PROJECT_NUMBER}@gcp-sa-pubsub.iam.gserviceaccount.com"
     requires the IAM cryptoKeyEncrypterDecrypter role for the given Cloud KMS
     key. CONSUMER_PROJECT_NUMBER is the project number of the project that is
     the parent of the topic being updated. The arguments in this group can be
     used to specify the attributes of this resource.

       --topic-encryption-key=TOPIC_ENCRYPTION_KEY
          ID of the key or fully qualified identifier for the key.

          To set the kms-key attribute:
          ▸ provide the argument --topic-encryption-key on the command line.

          This flag argument must be specified if any of the other arguments in
          this group are specified.

       --topic-encryption-key-keyring=TOPIC_ENCRYPTION_KEY_KEYRING
          The KMS keyring of the key.

          To set the kms-keyring attribute:
          ▸ provide the argument --topic-encryption-key on the command line
            with a fully specified name;
          ▸ provide the argument --topic-encryption-key-keyring on the
            command line.

       --topic-encryption-key-location=TOPIC_ENCRYPTION_KEY_LOCATION
          The Google Cloud location for the key.

          To set the kms-location attribute:
          ▸ provide the argument --topic-encryption-key on the command line
            with a fully specified name;
          ▸ provide the argument --topic-encryption-key-location on the
            command line.

       --topic-encryption-key-project=TOPIC_ENCRYPTION_KEY_PROJECT
          The Google Cloud project for the key.

          To set the kms-project attribute:
          ▸ provide the argument --topic-encryption-key on the command line
            with a fully specified name;
          ▸ provide the argument --topic-encryption-key-project on the
            command line;
          ▸ set the property core/project.

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
    These variants are also available:

        $ gcloud alpha pubsub topics update

        $ gcloud beta pubsub topics update

