diff --git a/packages/google-cloud-build/google/cloud/devtools/cloudbuild/__init__.py b/packages/google-cloud-build/google/cloud/devtools/cloudbuild/__init__.py
index 48e8ab57f2a3..badcdb9c7a14 100644
--- a/packages/google-cloud-build/google/cloud/devtools/cloudbuild/__init__.py
+++ b/packages/google-cloud-build/google/cloud/devtools/cloudbuild/__init__.py
@@ -57,7 +57,11 @@
 from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import GetBuildRequest
 from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import GetBuildTriggerRequest
 from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import GetWorkerPoolRequest
+from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import GitFileSource
+from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import GitHubEnterpriseConfig
+from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import GitHubEnterpriseSecrets
 from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import GitHubEventsConfig
+from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import GitRepoSource
 from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import GitSource
 from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import Hash
 from google.cloud.devtools.cloudbuild_v1.types.cloudbuild import InlineSecret
@@ -135,7 +139,11 @@
     "GetBuildRequest",
     "GetBuildTriggerRequest",
     "GetWorkerPoolRequest",
+    "GitFileSource",
+    "GitHubEnterpriseConfig",
+    "GitHubEnterpriseSecrets",
     "GitHubEventsConfig",
+    "GitRepoSource",
     "GitSource",
     "Hash",
     "InlineSecret",
diff --git a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/__init__.py b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/__init__.py
index 5ed2db4a9f15..07839e4a0817 100644
--- a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/__init__.py
+++ b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/__init__.py
@@ -45,7 +45,11 @@
 from .types.cloudbuild import GetBuildRequest
 from .types.cloudbuild import GetBuildTriggerRequest
 from .types.cloudbuild import GetWorkerPoolRequest
+from .types.cloudbuild import GitFileSource
+from .types.cloudbuild import GitHubEnterpriseConfig
+from .types.cloudbuild import GitHubEnterpriseSecrets
 from .types.cloudbuild import GitHubEventsConfig
+from .types.cloudbuild import GitRepoSource
 from .types.cloudbuild import GitSource
 from .types.cloudbuild import Hash
 from .types.cloudbuild import InlineSecret
@@ -111,7 +115,11 @@
     "GetBuildRequest",
     "GetBuildTriggerRequest",
     "GetWorkerPoolRequest",
+    "GitFileSource",
+    "GitHubEnterpriseConfig",
+    "GitHubEnterpriseSecrets",
     "GitHubEventsConfig",
+    "GitRepoSource",
     "GitSource",
     "Hash",
     "InlineSecret",
diff --git a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/services/cloud_build/async_client.py b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/services/cloud_build/async_client.py
index 953343d6d66c..9953ec41291b 100644
--- a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/services/cloud_build/async_client.py
+++ b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/services/cloud_build/async_client.py
@@ -77,6 +77,12 @@ class CloudBuildAsyncClient:
     parse_build_trigger_path = staticmethod(CloudBuildClient.parse_build_trigger_path)
     crypto_key_path = staticmethod(CloudBuildClient.crypto_key_path)
     parse_crypto_key_path = staticmethod(CloudBuildClient.parse_crypto_key_path)
+    github_enterprise_config_path = staticmethod(
+        CloudBuildClient.github_enterprise_config_path
+    )
+    parse_github_enterprise_config_path = staticmethod(
+        CloudBuildClient.parse_github_enterprise_config_path
+    )
     network_path = staticmethod(CloudBuildClient.network_path)
     parse_network_path = staticmethod(CloudBuildClient.parse_network_path)
     repository_path = staticmethod(CloudBuildClient.repository_path)
diff --git a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/services/cloud_build/client.py b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/services/cloud_build/client.py
index ad35d7b7d2d3..fb4e90d8ab6b 100644
--- a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/services/cloud_build/client.py
+++ b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/services/cloud_build/client.py
@@ -246,6 +246,25 @@ def parse_crypto_key_path(path: str) -> Dict[str, str]:
         )
         return m.groupdict() if m else {}
 
+    @staticmethod
+    def github_enterprise_config_path(
+        project: str,
+        config: str,
+    ) -> str:
+        """Returns a fully-qualified github_enterprise_config string."""
+        return "projects/{project}/githubEnterpriseConfigs/{config}".format(
+            project=project,
+            config=config,
+        )
+
+    @staticmethod
+    def parse_github_enterprise_config_path(path: str) -> Dict[str, str]:
+        """Parses a github_enterprise_config path into its component segments."""
+        m = re.match(
+            r"^projects/(?P<project>.+?)/githubEnterpriseConfigs/(?P<config>.+?)$", path
+        )
+        return m.groupdict() if m else {}
+
     @staticmethod
     def network_path(
         project: str,
diff --git a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/types/__init__.py b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/types/__init__.py
index 63514f34ff7b..546ce179a36f 100644
--- a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/types/__init__.py
+++ b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/types/__init__.py
@@ -38,7 +38,11 @@
     GetBuildRequest,
     GetBuildTriggerRequest,
     GetWorkerPoolRequest,
+    GitFileSource,
+    GitHubEnterpriseConfig,
+    GitHubEnterpriseSecrets,
     GitHubEventsConfig,
+    GitRepoSource,
     GitSource,
     Hash,
     InlineSecret,
@@ -103,7 +107,11 @@
     "GetBuildRequest",
     "GetBuildTriggerRequest",
     "GetWorkerPoolRequest",
+    "GitFileSource",
+    "GitHubEnterpriseConfig",
+    "GitHubEnterpriseSecrets",
     "GitHubEventsConfig",
+    "GitRepoSource",
     "GitSource",
     "Hash",
     "InlineSecret",
diff --git a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/types/cloudbuild.py b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/types/cloudbuild.py
index d073dba82b93..1b7c699e1702 100644
--- a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/types/cloudbuild.py
+++ b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v1/types/cloudbuild.py
@@ -63,6 +63,8 @@
         "BuildApproval",
         "ApprovalConfig",
         "ApprovalResult",
+        "GitRepoSource",
+        "GitFileSource",
         "BuildTrigger",
         "RepositoryEventConfig",
         "GitHubEventsConfig",
@@ -79,6 +81,8 @@
         "BuildOptions",
         "ReceiveTriggerWebhookRequest",
         "ReceiveTriggerWebhookResponse",
+        "GitHubEnterpriseConfig",
+        "GitHubEnterpriseSecrets",
         "WorkerPool",
         "PrivatePoolV1Config",
         "CreateWorkerPoolRequest",
@@ -534,6 +538,8 @@ class UploadedNpmPackage(proto.Message):
 class BuildStep(proto.Message):
     r"""A step in the build pipeline.
 
+    .. _oneof: https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields
+
     Attributes:
         name (str):
             Required. The name of the container image that will run this
@@ -645,6 +651,13 @@ class BuildStep(proto.Message):
             A shell script to be executed in the step.
             When script is provided, the user cannot specify
             the entrypoint or args.
+        automap_substitutions (bool):
+            Option to include built-in and custom
+            substitutions as env variables for this build
+            step. This option will override the global
+            option in BuildOption.
+
+            This field is a member of `oneof`_ ``_automap_substitutions``.
     """
 
     name: str = proto.Field(
@@ -720,6 +733,11 @@ class BuildStep(proto.Message):
         proto.STRING,
         number=19,
     )
+    automap_substitutions: bool = proto.Field(
+        proto.BOOL,
+        number=20,
+        optional=True,
+    )
 
 
 class Volume(proto.Message):
@@ -2079,6 +2097,164 @@ class Decision(proto.Enum):
     )
 
 
+class GitRepoSource(proto.Message):
+    r"""GitRepoSource describes a repo and ref of a code repository.
+
+    .. _oneof: https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields
+
+    Attributes:
+        uri (str):
+            The URI of the repo (e.g. https://github.com/user/repo.git).
+            Either ``uri`` or ``repository`` can be specified and is
+            required.
+        repository (str):
+            The connected repository resource name, in the format
+            ``projects/*/locations/*/connections/*/repositories/*``.
+            Either ``uri`` or ``repository`` can be specified and is
+            required.
+
+            This field is a member of `oneof`_ ``source``.
+        ref (str):
+            The branch or tag to use. Must start with
+            "refs/" (required).
+        repo_type (google.cloud.devtools.cloudbuild_v1.types.GitFileSource.RepoType):
+            See RepoType below.
+        github_enterprise_config (str):
+            The full resource name of the github enterprise config.
+            Format:
+            ``projects/{project}/locations/{location}/githubEnterpriseConfigs/{id}``.
+            ``projects/{project}/githubEnterpriseConfigs/{id}``.
+
+            This field is a member of `oneof`_ ``enterprise_config``.
+    """
+
+    uri: str = proto.Field(
+        proto.STRING,
+        number=1,
+    )
+    repository: str = proto.Field(
+        proto.STRING,
+        number=6,
+        oneof="source",
+    )
+    ref: str = proto.Field(
+        proto.STRING,
+        number=2,
+    )
+    repo_type: "GitFileSource.RepoType" = proto.Field(
+        proto.ENUM,
+        number=3,
+        enum="GitFileSource.RepoType",
+    )
+    github_enterprise_config: str = proto.Field(
+        proto.STRING,
+        number=4,
+        oneof="enterprise_config",
+    )
+
+
+class GitFileSource(proto.Message):
+    r"""GitFileSource describes a file within a (possibly remote)
+    code repository.
+
+
+    .. _oneof: https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields
+
+    Attributes:
+        path (str):
+            The path of the file, with the repo root as
+            the root of the path.
+        uri (str):
+            The URI of the repo.
+            Either uri or repository can be specified.
+            If unspecified, the repo from which the trigger
+            invocation originated is assumed to be the repo
+            from which to read the specified path.
+        repository (str):
+            The fully qualified resource name of the
+            Repos API repository. Either URI or repository
+            can be specified. If unspecified, the repo from
+            which the trigger invocation originated is
+            assumed to be the repo from which to read the
+            specified path.
+
+            This field is a member of `oneof`_ ``source``.
+        repo_type (google.cloud.devtools.cloudbuild_v1.types.GitFileSource.RepoType):
+            See RepoType above.
+        revision (str):
+            The branch, tag, arbitrary ref, or SHA
+            version of the repo to use when resolving the
+            filename (optional). This field respects the
+            same syntax/resolution as described here:
+
+            https://git-scm.com/docs/gitrevisions
+            If unspecified, the revision from which the
+            trigger invocation originated is assumed to be
+            the revision from which to read the specified
+            path.
+        github_enterprise_config (str):
+            The full resource name of the github enterprise config.
+            Format:
+            ``projects/{project}/locations/{location}/githubEnterpriseConfigs/{id}``.
+            ``projects/{project}/githubEnterpriseConfigs/{id}``.
+
+            This field is a member of `oneof`_ ``enterprise_config``.
+    """
+
+    class RepoType(proto.Enum):
+        r"""The type of the repo, since it may not be explicit from the ``repo``
+        field (e.g from a URL).
+
+        Values:
+            UNKNOWN (0):
+                The default, unknown repo type. Don't use it,
+                instead use one of the other repo types.
+            CLOUD_SOURCE_REPOSITORIES (1):
+                A Google Cloud Source Repositories-hosted
+                repo.
+            GITHUB (2):
+                A GitHub-hosted repo not necessarily on
+                "github.com" (i.e. GitHub Enterprise).
+            BITBUCKET_SERVER (3):
+                A Bitbucket Server-hosted repo.
+            GITLAB (4):
+                A GitLab-hosted repo.
+        """
+        UNKNOWN = 0
+        CLOUD_SOURCE_REPOSITORIES = 1
+        GITHUB = 2
+        BITBUCKET_SERVER = 3
+        GITLAB = 4
+
+    path: str = proto.Field(
+        proto.STRING,
+        number=1,
+    )
+    uri: str = proto.Field(
+        proto.STRING,
+        number=2,
+    )
+    repository: str = proto.Field(
+        proto.STRING,
+        number=7,
+        oneof="source",
+    )
+    repo_type: RepoType = proto.Field(
+        proto.ENUM,
+        number=3,
+        enum=RepoType,
+    )
+    revision: str = proto.Field(
+        proto.STRING,
+        number=4,
+    )
+    github_enterprise_config: str = proto.Field(
+        proto.STRING,
+        number=5,
+        oneof="enterprise_config",
+    )
+
+
 class BuildTrigger(proto.Message):
     r"""Configuration for an automated build in response to source
     repository changes.
@@ -2105,10 +2281,12 @@ class BuildTrigger(proto.Message):
             User-assigned name of the trigger. Must be
             unique within the project. Trigger names must
             meet the following requirements:
+
             + They must contain only alphanumeric characters
-            and dashes. + They can be 1-64 characters long.
+              and dashes.
+            + They can be 1-64 characters long.
             + They must begin and end with an alphanumeric
-            character.
+              character.
         tags (MutableSequence[str]):
             Tags for annotation of a ``BuildTrigger``
         trigger_template (google.cloud.devtools.cloudbuild_v1.types.RepoSource):
@@ -2136,6 +2314,7 @@ class BuildTrigger(proto.Message):
         autodetect (bool):
             Autodetect build configuration.  The
             following precedence is used (case insensitive):
+
             1. cloudbuild.yaml
             2. cloudbuild.yml
             3. cloudbuild.json
@@ -2153,6 +2332,11 @@ class BuildTrigger(proto.Message):
             Path, from the source root, to the build
             configuration file (i.e. cloudbuild.yaml).
 
+            This field is a member of `oneof`_ ``build_template``.
+        git_file_source (google.cloud.devtools.cloudbuild_v1.types.GitFileSource):
+            The file source describing the local or
+            remote Build template.
+
             This field is a member of `oneof`_ ``build_template``.
         create_time (google.protobuf.timestamp_pb2.Timestamp):
             Output only. Time when the trigger was
@@ -2188,6 +2372,14 @@ class BuildTrigger(proto.Message):
         filter (str):
             Optional. A Common Expression Language
             string.
+        source_to_build (google.cloud.devtools.cloudbuild_v1.types.GitRepoSource):
+            The repo and ref of the repository from which
+            to build. This field is used only for those
+            triggers that do not respond to SCM events.
+            Triggers that respond to such events build
+            source at whatever commit caused the event.
+            This field is currently only used by Webhook,
+            Pub/Sub, Manual, and Cron triggers.
         service_account (str):
             The service account used for all user-controlled operations
             including UpdateBuildTrigger, RunBuildTrigger, CreateBuild,
@@ -2258,6 +2450,12 @@ class BuildTrigger(proto.Message):
         number=8,
         oneof="build_template",
     )
+    git_file_source: "GitFileSource" = proto.Field(
+        proto.MESSAGE,
+        number=24,
+        oneof="build_template",
+        message="GitFileSource",
+    )
     create_time: timestamp_pb2.Timestamp = proto.Field(
         proto.MESSAGE,
         number=5,
@@ -2284,6 +2482,11 @@ class BuildTrigger(proto.Message):
         proto.STRING,
         number=30,
     )
+    source_to_build: "GitRepoSource" = proto.Field(
+        proto.MESSAGE,
+        number=26,
+        message="GitRepoSource",
+    )
     service_account: str = proto.Field(
         proto.STRING,
         number=33,
@@ -2806,6 +3009,11 @@ class UpdateBuildTriggerRequest(proto.Message):
             Required. ID of the ``BuildTrigger`` to update.
         trigger (google.cloud.devtools.cloudbuild_v1.types.BuildTrigger):
             Required. ``BuildTrigger`` to update.
+        update_mask (google.protobuf.field_mask_pb2.FieldMask):
+            Update mask for the resource. If this is set,
+            the server will only update the fields specified
+            in the field mask. Otherwise, a full update of
+            the mutable resource fields will be performed.
     """
 
     project_id: str = proto.Field(
@@ -2821,6 +3029,11 @@ class UpdateBuildTriggerRequest(proto.Message):
         number=3,
         message="BuildTrigger",
     )
+    update_mask: field_mask_pb2.FieldMask = proto.Field(
+        proto.MESSAGE,
+        number=5,
+        message=field_mask_pb2.FieldMask,
+    )
 
 
 class BuildOptions(proto.Message):
@@ -2856,6 +3069,10 @@ class BuildOptions(proto.Message):
             NOTE: this is always enabled for triggered
             builds and cannot be overridden in the build
             configuration file.
+        automap_substitutions (bool):
+            Option to include built-in and custom
+            substitutions as env variables for all build
+            steps.
         log_streaming_option (google.cloud.devtools.cloudbuild_v1.types.BuildOptions.LogStreamingOption):
             Option to define build log streaming behavior
             to Cloud Storage.
@@ -3082,6 +3299,10 @@ class PoolOption(proto.Message):
         proto.BOOL,
         number=17,
     )
+    automap_substitutions: bool = proto.Field(
+        proto.BOOL,
+        number=22,
+    )
     log_streaming_option: LogStreamingOption = proto.Field(
         proto.ENUM,
         number=5,
@@ -3172,6 +3393,125 @@ class ReceiveTriggerWebhookResponse(proto.Message):
     """
 
 
+class GitHubEnterpriseConfig(proto.Message):
+    r"""
+
+    Attributes:
+        name (str):
+            Optional. The full resource name for the
+            GitHubEnterpriseConfig For example:
+            "projects/{$project_id}/locations/{$location_id}/githubEnterpriseConfigs/{$config_id}".
+        host_url (str):
+            The URL of the github enterprise host the
+            configuration is for.
+        app_id (int):
+            Required. The GitHub app id of the Cloud
+            Build app on the GitHub Enterprise server.
+        create_time (google.protobuf.timestamp_pb2.Timestamp):
+            Output only. Time when the installation was
+            associated with the project.
+        webhook_key (str):
+            The key that should be attached to webhook
+            calls to the ReceiveWebhook endpoint.
+        peered_network (str):
+            Optional. The network to be used when reaching out to the
+            GitHub Enterprise server. The VPC network must be enabled
+            for private service connection. This should be set if the
+            GitHub Enterprise server is hosted on-premises and not
+            reachable by public internet. If this field is left empty,
+            no network peering will occur and calls to the GitHub
+            Enterprise server will be made over the public internet.
+            Must be in the format
+            ``projects/{project}/global/networks/{network}``, where
+            {project} is a project number or id and {network} is the
+            name of a VPC network in the project.
+        secrets (google.cloud.devtools.cloudbuild_v1.types.GitHubEnterpriseSecrets):
+            Names of secrets in Secret Manager.
+        display_name (str):
+            Name to display for this config.
+        ssl_ca (str):
+            Optional. SSL certificate to use for requests
+            to GitHub Enterprise.
+    """
+
+    name: str = proto.Field(
+        proto.STRING,
+        number=7,
+    )
+    host_url: str = proto.Field(
+        proto.STRING,
+        number=3,
+    )
+    app_id: int = proto.Field(
+        proto.INT64,
+        number=4,
+    )
+    create_time: timestamp_pb2.Timestamp = proto.Field(
+        proto.MESSAGE,
+        number=6,
+        message=timestamp_pb2.Timestamp,
+    )
+    webhook_key: str = proto.Field(
+        proto.STRING,
+        number=8,
+    )
+    peered_network: str = proto.Field(
+        proto.STRING,
+        number=9,
+    )
+    secrets: "GitHubEnterpriseSecrets" = proto.Field(
+        proto.MESSAGE,
+        number=10,
+        message="GitHubEnterpriseSecrets",
+    )
+    display_name: str = proto.Field(
+        proto.STRING,
+        number=11,
+    )
+    ssl_ca: str = proto.Field(
+        proto.STRING,
+        number=12,
+    )
+
+
+class GitHubEnterpriseSecrets(proto.Message):
+    r"""GitHubEnterpriseSecrets represents the names of all necessary
+    secrets in Secret Manager for a GitHub Enterprise server. Format
+    is: projects/<project number>/secrets/<secret name>.
+
+    Attributes:
+        private_key_version_name (str):
+            The resource name for the private key secret
+            version.
+        webhook_secret_version_name (str):
+            The resource name for the webhook secret
+            secret version in Secret Manager.
+        oauth_secret_version_name (str):
+            The resource name for the OAuth secret secret
+            version in Secret Manager.
+        oauth_client_id_version_name (str):
+            The resource name for the OAuth client ID
+            secret version in Secret Manager.
+    """
+
+    private_key_version_name: str = proto.Field(
+        proto.STRING,
+        number=5,
+    )
+    webhook_secret_version_name: str = proto.Field(
+        proto.STRING,
+        number=6,
+    )
+    oauth_secret_version_name: str = proto.Field(
+        proto.STRING,
+        number=7,
+    )
+    oauth_client_id_version_name: str = proto.Field(
+        proto.STRING,
+        number=8,
+    )
+
+
 class WorkerPool(proto.Message):
     r"""Configuration for a ``WorkerPool``.
 
diff --git a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v2/types/repositories.py b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v2/types/repositories.py
index 975e61bf10d2..62b41a0c393e 100644
--- a/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v2/types/repositories.py
+++ b/packages/google-cloud-build/google/cloud/devtools/cloudbuild_v2/types/repositories.py
@@ -475,6 +475,7 @@ class ServiceDirectoryConfig(proto.Message):
         service (str):
             Required. The Service Directory service name.
             Format:
+
             projects/{project}/locations/{location}/namespaces/{namespace}/services/{service}.
     """
 
diff --git a/packages/google-cloud-build/samples/generated_samples/snippet_metadata_google.devtools.cloudbuild.v1.json b/packages/google-cloud-build/samples/generated_samples/snippet_metadata_google.devtools.cloudbuild.v1.json
index 89703d207741..e379efab560f 100644
--- a/packages/google-cloud-build/samples/generated_samples/snippet_metadata_google.devtools.cloudbuild.v1.json
+++ b/packages/google-cloud-build/samples/generated_samples/snippet_metadata_google.devtools.cloudbuild.v1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-build",
-    "version": "3.19.0"
+    "version": "0.1.0"
   },
   "snippets": [
     {
diff --git a/packages/google-cloud-build/samples/generated_samples/snippet_metadata_google.devtools.cloudbuild.v2.json b/packages/google-cloud-build/samples/generated_samples/snippet_metadata_google.devtools.cloudbuild.v2.json
index 6995137b89fa..818d3fc2029c 100644
--- a/packages/google-cloud-build/samples/generated_samples/snippet_metadata_google.devtools.cloudbuild.v2.json
+++ b/packages/google-cloud-build/samples/generated_samples/snippet_metadata_google.devtools.cloudbuild.v2.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-build",
-    "version": "3.19.0"
+    "version": "0.1.0"
   },
   "snippets": [
     {
diff --git a/packages/google-cloud-build/scripts/fixup_cloudbuild_v1_keywords.py b/packages/google-cloud-build/scripts/fixup_cloudbuild_v1_keywords.py
index 78aabad9f31c..92866fb1f05b 100644
--- a/packages/google-cloud-build/scripts/fixup_cloudbuild_v1_keywords.py
+++ b/packages/google-cloud-build/scripts/fixup_cloudbuild_v1_keywords.py
@@ -55,7 +55,7 @@ class cloudbuildCallTransformer(cst.CSTTransformer):
         'receive_trigger_webhook': ('name', 'body', 'project_id', 'trigger', 'secret', ),
         'retry_build': ('project_id', 'id', 'name', ),
         'run_build_trigger': ('project_id', 'trigger_id', 'name', 'source', ),
-        'update_build_trigger': ('project_id', 'trigger_id', 'trigger', ),
+        'update_build_trigger': ('project_id', 'trigger_id', 'trigger', 'update_mask', ),
         'update_worker_pool': ('worker_pool', 'update_mask', 'validate_only', ),
     }
 
diff --git a/packages/google-cloud-build/tests/unit/gapic/cloudbuild_v1/test_cloud_build.py b/packages/google-cloud-build/tests/unit/gapic/cloudbuild_v1/test_cloud_build.py
index f5fb0f8c109e..2570d6354d41 100644
--- a/packages/google-cloud-build/tests/unit/gapic/cloudbuild_v1/test_cloud_build.py
+++ b/packages/google-cloud-build/tests/unit/gapic/cloudbuild_v1/test_cloud_build.py
@@ -5294,6 +5294,7 @@ def test_create_build_rest(request_type):
                 "exit_code": 948,
                 "allow_exit_codes": [1702, 1703],
                 "script": "script_value",
+                "automap_substitutions": True,
             }
         ],
         "results": {
@@ -5374,6 +5375,7 @@ def test_create_build_rest(request_type):
             "disk_size_gb": 1261,
             "substitution_option": 1,
             "dynamic_substitutions": True,
+            "automap_substitutions": True,
             "log_streaming_option": 1,
             "worker_pool": "worker_pool_value",
             "pool": {"name": "name_value"},
@@ -5644,6 +5646,7 @@ def test_create_build_rest_bad_request(
                 "exit_code": 948,
                 "allow_exit_codes": [1702, 1703],
                 "script": "script_value",
+                "automap_substitutions": True,
             }
         ],
         "results": {
@@ -5724,6 +5727,7 @@ def test_create_build_rest_bad_request(
             "disk_size_gb": 1261,
             "substitution_option": 1,
             "dynamic_substitutions": True,
+            "automap_substitutions": True,
             "log_streaming_option": 1,
             "worker_pool": "worker_pool_value",
             "pool": {"name": "name_value"},
@@ -7403,6 +7407,7 @@ def test_create_build_trigger_rest(request_type):
                     "exit_code": 948,
                     "allow_exit_codes": [1702, 1703],
                     "script": "script_value",
+                    "automap_substitutions": True,
                 }
             ],
             "results": {
@@ -7486,6 +7491,7 @@ def test_create_build_trigger_rest(request_type):
                 "disk_size_gb": 1261,
                 "substitution_option": 1,
                 "dynamic_substitutions": True,
+                "automap_substitutions": True,
                 "log_streaming_option": 1,
                 "worker_pool": "worker_pool_value",
                 "pool": {"name": "name_value"},
@@ -7522,12 +7528,27 @@ def test_create_build_trigger_rest(request_type):
             "failure_info": {"type_": 1, "detail": "detail_value"},
         },
         "filename": "filename_value",
+        "git_file_source": {
+            "path": "path_value",
+            "uri": "uri_value",
+            "repository": "repository_value",
+            "repo_type": 1,
+            "revision": "revision_value",
+            "github_enterprise_config": "github_enterprise_config_value",
+        },
         "create_time": {},
         "disabled": True,
         "substitutions": {},
         "ignored_files": ["ignored_files_value1", "ignored_files_value2"],
         "included_files": ["included_files_value1", "included_files_value2"],
         "filter": "filter_value",
+        "source_to_build": {
+            "uri": "uri_value",
+            "repository": "repository_value",
+            "ref": "ref_value",
+            "repo_type": 1,
+            "github_enterprise_config": "github_enterprise_config_value",
+        },
         "service_account": "service_account_value",
         "repository_event_config": {
             "repository": "repository_value",
@@ -7828,6 +7849,7 @@ def test_create_build_trigger_rest_bad_request(
                     "exit_code": 948,
                     "allow_exit_codes": [1702, 1703],
                     "script": "script_value",
+                    "automap_substitutions": True,
                 }
             ],
             "results": {
@@ -7911,6 +7933,7 @@ def test_create_build_trigger_rest_bad_request(
                 "disk_size_gb": 1261,
                 "substitution_option": 1,
                 "dynamic_substitutions": True,
+                "automap_substitutions": True,
                 "log_streaming_option": 1,
                 "worker_pool": "worker_pool_value",
                 "pool": {"name": "name_value"},
@@ -7947,12 +7970,27 @@ def test_create_build_trigger_rest_bad_request(
             "failure_info": {"type_": 1, "detail": "detail_value"},
         },
         "filename": "filename_value",
+        "git_file_source": {
+            "path": "path_value",
+            "uri": "uri_value",
+            "repository": "repository_value",
+            "repo_type": 1,
+            "revision": "revision_value",
+            "github_enterprise_config": "github_enterprise_config_value",
+        },
         "create_time": {},
         "disabled": True,
         "substitutions": {},
         "ignored_files": ["ignored_files_value1", "ignored_files_value2"],
         "included_files": ["included_files_value1", "included_files_value2"],
         "filter": "filter_value",
+        "source_to_build": {
+            "uri": "uri_value",
+            "repository": "repository_value",
+            "ref": "ref_value",
+            "repo_type": 1,
+            "github_enterprise_config": "github_enterprise_config_value",
+        },
         "service_account": "service_account_value",
         "repository_event_config": {
             "repository": "repository_value",
@@ -9049,6 +9087,7 @@ def test_update_build_trigger_rest(request_type):
                     "exit_code": 948,
                     "allow_exit_codes": [1702, 1703],
                     "script": "script_value",
+                    "automap_substitutions": True,
                 }
             ],
             "results": {
@@ -9132,6 +9171,7 @@ def test_update_build_trigger_rest(request_type):
                 "disk_size_gb": 1261,
                 "substitution_option": 1,
                 "dynamic_substitutions": True,
+                "automap_substitutions": True,
                 "log_streaming_option": 1,
                 "worker_pool": "worker_pool_value",
                 "pool": {"name": "name_value"},
@@ -9168,12 +9208,27 @@ def test_update_build_trigger_rest(request_type):
             "failure_info": {"type_": 1, "detail": "detail_value"},
         },
         "filename": "filename_value",
+        "git_file_source": {
+            "path": "path_value",
+            "uri": "uri_value",
+            "repository": "repository_value",
+            "repo_type": 1,
+            "revision": "revision_value",
+            "github_enterprise_config": "github_enterprise_config_value",
+        },
         "create_time": {},
         "disabled": True,
         "substitutions": {},
         "ignored_files": ["ignored_files_value1", "ignored_files_value2"],
         "included_files": ["included_files_value1", "included_files_value2"],
         "filter": "filter_value",
+        "source_to_build": {
+            "uri": "uri_value",
+            "repository": "repository_value",
+            "ref": "ref_value",
+            "repo_type": 1,
+            "github_enterprise_config": "github_enterprise_config_value",
+        },
         "service_account": "service_account_value",
         "repository_event_config": {
             "repository": "repository_value",
@@ -9258,6 +9313,8 @@ def test_update_build_trigger_rest_required_fields(
     unset_fields = transport_class(
         credentials=ga_credentials.AnonymousCredentials()
     ).update_build_trigger._get_unset_required_fields(jsonified_request)
+    # Check that path parameters and body parameters are not mixing in.
+    assert not set(unset_fields) - set(("update_mask",))
     jsonified_request.update(unset_fields)
 
     # verify required fields with non-default values are left alone
@@ -9314,7 +9371,7 @@ def test_update_build_trigger_rest_unset_required_fields():
 
     unset_fields = transport.update_build_trigger._get_unset_required_fields({})
     assert set(unset_fields) == (
-        set(())
+        set(("updateMask",))
         & set(
             (
                 "projectId",
@@ -9477,6 +9534,7 @@ def test_update_build_trigger_rest_bad_request(
                     "exit_code": 948,
                     "allow_exit_codes": [1702, 1703],
                     "script": "script_value",
+                    "automap_substitutions": True,
                 }
             ],
             "results": {
@@ -9560,6 +9618,7 @@ def test_update_build_trigger_rest_bad_request(
                 "disk_size_gb": 1261,
                 "substitution_option": 1,
                 "dynamic_substitutions": True,
+                "automap_substitutions": True,
                 "log_streaming_option": 1,
                 "worker_pool": "worker_pool_value",
                 "pool": {"name": "name_value"},
@@ -9596,12 +9655,27 @@ def test_update_build_trigger_rest_bad_request(
             "failure_info": {"type_": 1, "detail": "detail_value"},
         },
         "filename": "filename_value",
+        "git_file_source": {
+            "path": "path_value",
+            "uri": "uri_value",
+            "repository": "repository_value",
+            "repo_type": 1,
+            "revision": "revision_value",
+            "github_enterprise_config": "github_enterprise_config_value",
+        },
         "create_time": {},
         "disabled": True,
         "substitutions": {},
         "ignored_files": ["ignored_files_value1", "ignored_files_value2"],
         "included_files": ["included_files_value1", "included_files_value2"],
         "filter": "filter_value",
+        "source_to_build": {
+            "uri": "uri_value",
+            "repository": "repository_value",
+            "ref": "ref_value",
+            "repo_type": 1,
+            "github_enterprise_config": "github_enterprise_config_value",
+        },
         "service_account": "service_account_value",
         "repository_event_config": {
             "repository": "repository_value",
@@ -12430,9 +12504,32 @@ def test_parse_crypto_key_path():
     assert expected == actual
 
 
-def test_network_path():
+def test_github_enterprise_config_path():
     project = "oyster"
-    network = "nudibranch"
+    config = "nudibranch"
+    expected = "projects/{project}/githubEnterpriseConfigs/{config}".format(
+        project=project,
+        config=config,
+    )
+    actual = CloudBuildClient.github_enterprise_config_path(project, config)
+    assert expected == actual
+
+
+def test_parse_github_enterprise_config_path():
+    expected = {
+        "project": "cuttlefish",
+        "config": "mussel",
+    }
+    path = CloudBuildClient.github_enterprise_config_path(**expected)
+
+    # Check that the path construction is reversible.
+    actual = CloudBuildClient.parse_github_enterprise_config_path(path)
+    assert expected == actual
+
+
+def test_network_path():
+    project = "winkle"
+    network = "nautilus"
     expected = "projects/{project}/global/networks/{network}".format(
         project=project,
         network=network,
@@ -12443,8 +12540,8 @@ def test_network_path():
 
 def test_parse_network_path():
     expected = {
-        "project": "cuttlefish",
-        "network": "mussel",
+        "project": "scallop",
+        "network": "abalone",
     }
     path = CloudBuildClient.network_path(**expected)
 
@@ -12454,10 +12551,10 @@ def test_parse_network_path():
 
 
 def test_repository_path():
-    project = "winkle"
-    location = "nautilus"
-    connection = "scallop"
-    repository = "abalone"
+    project = "squid"
+    location = "clam"
+    connection = "whelk"
+    repository = "octopus"
     expected = "projects/{project}/locations/{location}/connections/{connection}/repositories/{repository}".format(
         project=project,
         location=location,
@@ -12470,10 +12567,10 @@ def test_repository_path():
 
 def test_parse_repository_path():
     expected = {
-        "project": "squid",
-        "location": "clam",
-        "connection": "whelk",
-        "repository": "octopus",
+        "project": "oyster",
+        "location": "nudibranch",
+        "connection": "cuttlefish",
+        "repository": "mussel",
     }
     path = CloudBuildClient.repository_path(**expected)
 
@@ -12483,9 +12580,9 @@ def test_parse_repository_path():
 
 
 def test_secret_version_path():
-    project = "oyster"
-    secret = "nudibranch"
-    version = "cuttlefish"
+    project = "winkle"
+    secret = "nautilus"
+    version = "scallop"
     expected = "projects/{project}/secrets/{secret}/versions/{version}".format(
         project=project,
         secret=secret,
@@ -12497,9 +12594,9 @@ def test_secret_version_path():
 
 def test_parse_secret_version_path():
     expected = {
-        "project": "mussel",
-        "secret": "winkle",
-        "version": "nautilus",
+        "project": "abalone",
+        "secret": "squid",
+        "version": "clam",
     }
     path = CloudBuildClient.secret_version_path(**expected)
 
@@ -12509,8 +12606,8 @@ def test_parse_secret_version_path():
 
 
 def test_service_account_path():
-    project = "scallop"
-    service_account = "abalone"
+    project = "whelk"
+    service_account = "octopus"
     expected = "projects/{project}/serviceAccounts/{service_account}".format(
         project=project,
         service_account=service_account,
@@ -12521,8 +12618,8 @@ def test_service_account_path():
 
 def test_parse_service_account_path():
     expected = {
-        "project": "squid",
-        "service_account": "clam",
+        "project": "oyster",
+        "service_account": "nudibranch",
     }
     path = CloudBuildClient.service_account_path(**expected)
 
@@ -12532,8 +12629,8 @@ def test_parse_service_account_path():
 
 
 def test_subscription_path():
-    project = "whelk"
-    subscription = "octopus"
+    project = "cuttlefish"
+    subscription = "mussel"
     expected = "projects/{project}/subscriptions/{subscription}".format(
         project=project,
         subscription=subscription,
@@ -12544,8 +12641,8 @@ def test_subscription_path():
 
 def test_parse_subscription_path():
     expected = {
-        "project": "oyster",
-        "subscription": "nudibranch",
+        "project": "winkle",
+        "subscription": "nautilus",
     }
     path = CloudBuildClient.subscription_path(**expected)
 
@@ -12555,8 +12652,8 @@ def test_parse_subscription_path():
 
 
 def test_topic_path():
-    project = "cuttlefish"
-    topic = "mussel"
+    project = "scallop"
+    topic = "abalone"
     expected = "projects/{project}/topics/{topic}".format(
         project=project,
         topic=topic,
@@ -12567,8 +12664,8 @@ def test_topic_path():
 
 def test_parse_topic_path():
     expected = {
-        "project": "winkle",
-        "topic": "nautilus",
+        "project": "squid",
+        "topic": "clam",
     }
     path = CloudBuildClient.topic_path(**expected)
 
@@ -12578,9 +12675,9 @@ def test_parse_topic_path():
 
 
 def test_worker_pool_path():
-    project = "scallop"
-    location = "abalone"
-    worker_pool = "squid"
+    project = "whelk"
+    location = "octopus"
+    worker_pool = "oyster"
     expected = (
         "projects/{project}/locations/{location}/workerPools/{worker_pool}".format(
             project=project,
@@ -12594,9 +12691,9 @@ def test_worker_pool_path():
 
 def test_parse_worker_pool_path():
     expected = {
-        "project": "clam",
-        "location": "whelk",
-        "worker_pool": "octopus",
+        "project": "nudibranch",
+        "location": "cuttlefish",
+        "worker_pool": "mussel",
     }
     path = CloudBuildClient.worker_pool_path(**expected)
 
@@ -12606,7 +12703,7 @@ def test_parse_worker_pool_path():
 
 
 def test_common_billing_account_path():
-    billing_account = "oyster"
+    billing_account = "winkle"
     expected = "billingAccounts/{billing_account}".format(
         billing_account=billing_account,
     )
@@ -12616,7 +12713,7 @@ def test_common_billing_account_path():
 
 def test_parse_common_billing_account_path():
     expected = {
-        "billing_account": "nudibranch",
+        "billing_account": "nautilus",
     }
     path = CloudBuildClient.common_billing_account_path(**expected)
 
@@ -12626,7 +12723,7 @@ def test_parse_common_billing_account_path():
 
 
 def test_common_folder_path():
-    folder = "cuttlefish"
+    folder = "scallop"
     expected = "folders/{folder}".format(
         folder=folder,
     )
@@ -12636,7 +12733,7 @@ def test_common_folder_path():
 
 def test_parse_common_folder_path():
     expected = {
-        "folder": "mussel",
+        "folder": "abalone",
     }
     path = CloudBuildClient.common_folder_path(**expected)
 
@@ -12646,7 +12743,7 @@ def test_parse_common_folder_path():
 
 
 def test_common_organization_path():
-    organization = "winkle"
+    organization = "squid"
     expected = "organizations/{organization}".format(
         organization=organization,
     )
@@ -12656,7 +12753,7 @@ def test_common_organization_path():
 
 def test_parse_common_organization_path():
     expected = {
-        "organization": "nautilus",
+        "organization": "clam",
     }
     path = CloudBuildClient.common_organization_path(**expected)
 
@@ -12666,7 +12763,7 @@ def test_parse_common_organization_path():
 
 
 def test_common_project_path():
-    project = "scallop"
+    project = "whelk"
     expected = "projects/{project}".format(
         project=project,
     )
@@ -12676,7 +12773,7 @@ def test_common_project_path():
 
 def test_parse_common_project_path():
     expected = {
-        "project": "abalone",
+        "project": "octopus",
     }
     path = CloudBuildClient.common_project_path(**expected)
 
@@ -12686,8 +12783,8 @@ def test_parse_common_project_path():
 
 
 def test_common_location_path():
-    project = "squid"
-    location = "clam"
+    project = "oyster"
+    location = "nudibranch"
     expected = "projects/{project}/locations/{location}".format(
         project=project,
         location=location,
@@ -12698,8 +12795,8 @@ def test_common_location_path():
 
 def test_parse_common_location_path():
     expected = {
-        "project": "whelk",
-        "location": "octopus",
+        "project": "cuttlefish",
+        "location": "mussel",
     }
     path = CloudBuildClient.common_location_path(**expected)