diff --git a/google-cloud-build/src/test/java/com/google/cloud/devtools/cloudbuild/v1/CloudBuildClientTest.java b/google-cloud-build/src/test/java/com/google/cloud/devtools/cloudbuild/v1/CloudBuildClientTest.java
index 85620812..db7f7328 100644
--- a/google-cloud-build/src/test/java/com/google/cloud/devtools/cloudbuild/v1/CloudBuildClientTest.java
+++ b/google-cloud-build/src/test/java/com/google/cloud/devtools/cloudbuild/v1/CloudBuildClientTest.java
@@ -565,6 +565,7 @@ public void createBuildTriggerTest() throws Exception {
             .addAllIgnoredFiles(new ArrayList<String>())
             .addAllIncludedFiles(new ArrayList<String>())
             .setFilter("filter-1274492040")
+            .setServiceAccount("serviceAccount1079137720")
             .build();
     mockCloudBuild.addResponse(expectedResponse);
 
@@ -620,6 +621,7 @@ public void getBuildTriggerTest() throws Exception {
             .addAllIgnoredFiles(new ArrayList<String>())
             .addAllIncludedFiles(new ArrayList<String>())
             .setFilter("filter-1274492040")
+            .setServiceAccount("serviceAccount1079137720")
             .build();
     mockCloudBuild.addResponse(expectedResponse);
 
@@ -756,6 +758,7 @@ public void updateBuildTriggerTest() throws Exception {
             .addAllIgnoredFiles(new ArrayList<String>())
             .addAllIncludedFiles(new ArrayList<String>())
             .setFilter("filter-1274492040")
+            .setServiceAccount("serviceAccount1079137720")
             .build();
     mockCloudBuild.addResponse(expectedResponse);
 
diff --git a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildStep.java b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildStep.java
index f906eaad..e23d74cb 100644
--- a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildStep.java
+++ b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildStep.java
@@ -48,6 +48,7 @@ private BuildStep() {
     secretEnv_ = com.google.protobuf.LazyStringArrayList.EMPTY;
     volumes_ = java.util.Collections.emptyList();
     status_ = 0;
+    script_ = "";
   }
 
   @java.lang.Override
@@ -208,6 +209,13 @@ private BuildStep(
                 pullTiming_ = subBuilder.buildPartial();
               }
 
+              break;
+            }
+          case 154:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              script_ = s;
               break;
             }
           default:
@@ -1090,6 +1098,57 @@ public com.google.cloudbuild.v1.Build.Status getStatus() {
     return result == null ? com.google.cloudbuild.v1.Build.Status.UNRECOGNIZED : result;
   }
 
+  public static final int SCRIPT_FIELD_NUMBER = 19;
+  private volatile java.lang.Object script_;
+  /**
+   *
+   *
+   * <pre>
+   * A shell script to be executed in the step.
+   * When script is provided, the user cannot specify the entrypoint or args.
+   * </pre>
+   *
+   * <code>string script = 19;</code>
+   *
+   * @return The script.
+   */
+  @java.lang.Override
+  public java.lang.String getScript() {
+    java.lang.Object ref = script_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      script_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A shell script to be executed in the step.
+   * When script is provided, the user cannot specify the entrypoint or args.
+   * </pre>
+   *
+   * <code>string script = 19;</code>
+   *
+   * @return The bytes for script.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getScriptBytes() {
+    java.lang.Object ref = script_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      script_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -1143,6 +1202,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (pullTiming_ != null) {
       output.writeMessage(13, getPullTiming());
     }
+    if (!getScriptBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 19, script_);
+    }
     unknownFields.writeTo(output);
   }
 
@@ -1211,6 +1273,9 @@ public int getSerializedSize() {
     if (pullTiming_ != null) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(13, getPullTiming());
     }
+    if (!getScriptBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(19, script_);
+    }
     size += unknownFields.getSerializedSize();
     memoizedSize = size;
     return size;
@@ -1248,6 +1313,7 @@ public boolean equals(final java.lang.Object obj) {
       if (!getTimeout().equals(other.getTimeout())) return false;
     }
     if (status_ != other.status_) return false;
+    if (!getScript().equals(other.getScript())) return false;
     if (!unknownFields.equals(other.unknownFields)) return false;
     return true;
   }
@@ -1301,6 +1367,8 @@ public int hashCode() {
     }
     hash = (37 * hash) + STATUS_FIELD_NUMBER;
     hash = (53 * hash) + status_;
+    hash = (37 * hash) + SCRIPT_FIELD_NUMBER;
+    hash = (53 * hash) + getScript().hashCode();
     hash = (29 * hash) + unknownFields.hashCode();
     memoizedHashCode = hash;
     return hash;
@@ -1489,6 +1557,8 @@ public Builder clear() {
       }
       status_ = 0;
 
+      script_ = "";
+
       return this;
     }
 
@@ -1565,6 +1635,7 @@ public com.google.cloudbuild.v1.BuildStep buildPartial() {
         result.timeout_ = timeoutBuilder_.build();
       }
       result.status_ = status_;
+      result.script_ = script_;
       onBuilt();
       return result;
     }
@@ -1709,6 +1780,10 @@ public Builder mergeFrom(com.google.cloudbuild.v1.BuildStep other) {
       if (other.status_ != 0) {
         setStatusValue(other.getStatusValue());
       }
+      if (!other.getScript().isEmpty()) {
+        script_ = other.script_;
+        onChanged();
+      }
       this.mergeUnknownFields(other.unknownFields);
       onChanged();
       return this;
@@ -4206,6 +4281,117 @@ public Builder clearStatus() {
       return this;
     }
 
+    private java.lang.Object script_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * A shell script to be executed in the step.
+     * When script is provided, the user cannot specify the entrypoint or args.
+     * </pre>
+     *
+     * <code>string script = 19;</code>
+     *
+     * @return The script.
+     */
+    public java.lang.String getScript() {
+      java.lang.Object ref = script_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        script_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A shell script to be executed in the step.
+     * When script is provided, the user cannot specify the entrypoint or args.
+     * </pre>
+     *
+     * <code>string script = 19;</code>
+     *
+     * @return The bytes for script.
+     */
+    public com.google.protobuf.ByteString getScriptBytes() {
+      java.lang.Object ref = script_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        script_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A shell script to be executed in the step.
+     * When script is provided, the user cannot specify the entrypoint or args.
+     * </pre>
+     *
+     * <code>string script = 19;</code>
+     *
+     * @param value The script to set.
+     * @return This builder for chaining.
+     */
+    public Builder setScript(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      script_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A shell script to be executed in the step.
+     * When script is provided, the user cannot specify the entrypoint or args.
+     * </pre>
+     *
+     * <code>string script = 19;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearScript() {
+
+      script_ = getDefaultInstance().getScript();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A shell script to be executed in the step.
+     * When script is provided, the user cannot specify the entrypoint or args.
+     * </pre>
+     *
+     * <code>string script = 19;</code>
+     *
+     * @param value The bytes for script to set.
+     * @return This builder for chaining.
+     */
+    public Builder setScriptBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      script_ = value;
+      onChanged();
+      return this;
+    }
+
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
       return super.setUnknownFields(unknownFields);
diff --git a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildStepOrBuilder.java b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildStepOrBuilder.java
index 15c27095..30624b22 100644
--- a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildStepOrBuilder.java
+++ b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildStepOrBuilder.java
@@ -653,4 +653,31 @@ public interface BuildStepOrBuilder
    * @return The status.
    */
   com.google.cloudbuild.v1.Build.Status getStatus();
+
+  /**
+   *
+   *
+   * <pre>
+   * A shell script to be executed in the step.
+   * When script is provided, the user cannot specify the entrypoint or args.
+   * </pre>
+   *
+   * <code>string script = 19;</code>
+   *
+   * @return The script.
+   */
+  java.lang.String getScript();
+  /**
+   *
+   *
+   * <pre>
+   * A shell script to be executed in the step.
+   * When script is provided, the user cannot specify the entrypoint or args.
+   * </pre>
+   *
+   * <code>string script = 19;</code>
+   *
+   * @return The bytes for script.
+   */
+  com.google.protobuf.ByteString getScriptBytes();
 }
diff --git a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildTrigger.java b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildTrigger.java
index 0998b5a8..5ea267fb 100644
--- a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildTrigger.java
+++ b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildTrigger.java
@@ -47,6 +47,7 @@ private BuildTrigger() {
     ignoredFiles_ = com.google.protobuf.LazyStringArrayList.EMPTY;
     includedFiles_ = com.google.protobuf.LazyStringArrayList.EMPTY;
     filter_ = "";
+    serviceAccount_ = "";
   }
 
   @java.lang.Override
@@ -264,6 +265,13 @@ private BuildTrigger(
                 webhookConfig_ = subBuilder.buildPartial();
               }
 
+              break;
+            }
+          case 266:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              serviceAccount_ = s;
               break;
             }
           case 274:
@@ -1424,6 +1432,63 @@ public com.google.protobuf.ByteString getFilterBytes() {
     }
   }
 
+  public static final int SERVICE_ACCOUNT_FIELD_NUMBER = 33;
+  private volatile java.lang.Object serviceAccount_;
+  /**
+   *
+   *
+   * <pre>
+   * The service account used for all user-controlled operations including
+   * UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+   * If no service account is set, then the standard Cloud Build service account
+   * ([PROJECT_NUM]&#64;system.gserviceaccount.com) will be used instead.
+   * Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+   * </pre>
+   *
+   * <code>string service_account = 33 [(.google.api.resource_reference) = { ... }</code>
+   *
+   * @return The serviceAccount.
+   */
+  @java.lang.Override
+  public java.lang.String getServiceAccount() {
+    java.lang.Object ref = serviceAccount_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      serviceAccount_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The service account used for all user-controlled operations including
+   * UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+   * If no service account is set, then the standard Cloud Build service account
+   * ([PROJECT_NUM]&#64;system.gserviceaccount.com) will be used instead.
+   * Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+   * </pre>
+   *
+   * <code>string service_account = 33 [(.google.api.resource_reference) = { ... }</code>
+   *
+   * @return The bytes for serviceAccount.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getServiceAccountBytes() {
+    java.lang.Object ref = serviceAccount_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      serviceAccount_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -1488,6 +1553,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (webhookConfig_ != null) {
       output.writeMessage(31, getWebhookConfig());
     }
+    if (!getServiceAccountBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 33, serviceAccount_);
+    }
     if (!getResourceNameBytes().isEmpty()) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 34, resourceName_);
     }
@@ -1577,6 +1645,9 @@ public int getSerializedSize() {
     if (webhookConfig_ != null) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(31, getWebhookConfig());
     }
+    if (!getServiceAccountBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(33, serviceAccount_);
+    }
     if (!getResourceNameBytes().isEmpty()) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(34, resourceName_);
     }
@@ -1625,6 +1696,7 @@ public boolean equals(final java.lang.Object obj) {
     if (!getIgnoredFilesList().equals(other.getIgnoredFilesList())) return false;
     if (!getIncludedFilesList().equals(other.getIncludedFilesList())) return false;
     if (!getFilter().equals(other.getFilter())) return false;
+    if (!getServiceAccount().equals(other.getServiceAccount())) return false;
     if (!getBuildTemplateCase().equals(other.getBuildTemplateCase())) return false;
     switch (buildTemplateCase_) {
       case 18:
@@ -1698,6 +1770,8 @@ public int hashCode() {
     }
     hash = (37 * hash) + FILTER_FIELD_NUMBER;
     hash = (53 * hash) + getFilter().hashCode();
+    hash = (37 * hash) + SERVICE_ACCOUNT_FIELD_NUMBER;
+    hash = (53 * hash) + getServiceAccount().hashCode();
     switch (buildTemplateCase_) {
       case 18:
         hash = (37 * hash) + AUTODETECT_FIELD_NUMBER;
@@ -1928,6 +2002,8 @@ public Builder clear() {
       bitField0_ = (bitField0_ & ~0x00000008);
       filter_ = "";
 
+      serviceAccount_ = "";
+
       buildTemplateCase_ = 0;
       buildTemplate_ = null;
       return this;
@@ -2019,6 +2095,7 @@ public com.google.cloudbuild.v1.BuildTrigger buildPartial() {
       }
       result.includedFiles_ = includedFiles_;
       result.filter_ = filter_;
+      result.serviceAccount_ = serviceAccount_;
       result.buildTemplateCase_ = buildTemplateCase_;
       onBuilt();
       return result;
@@ -2138,6 +2215,10 @@ public Builder mergeFrom(com.google.cloudbuild.v1.BuildTrigger other) {
         filter_ = other.filter_;
         onChanged();
       }
+      if (!other.getServiceAccount().isEmpty()) {
+        serviceAccount_ = other.serviceAccount_;
+        onChanged();
+      }
       switch (other.getBuildTemplateCase()) {
         case AUTODETECT:
           {
@@ -5050,6 +5131,132 @@ public Builder setFilterBytes(com.google.protobuf.ByteString value) {
       return this;
     }
 
+    private java.lang.Object serviceAccount_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The service account used for all user-controlled operations including
+     * UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+     * If no service account is set, then the standard Cloud Build service account
+     * ([PROJECT_NUM]&#64;system.gserviceaccount.com) will be used instead.
+     * Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+     * </pre>
+     *
+     * <code>string service_account = 33 [(.google.api.resource_reference) = { ... }</code>
+     *
+     * @return The serviceAccount.
+     */
+    public java.lang.String getServiceAccount() {
+      java.lang.Object ref = serviceAccount_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        serviceAccount_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The service account used for all user-controlled operations including
+     * UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+     * If no service account is set, then the standard Cloud Build service account
+     * ([PROJECT_NUM]&#64;system.gserviceaccount.com) will be used instead.
+     * Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+     * </pre>
+     *
+     * <code>string service_account = 33 [(.google.api.resource_reference) = { ... }</code>
+     *
+     * @return The bytes for serviceAccount.
+     */
+    public com.google.protobuf.ByteString getServiceAccountBytes() {
+      java.lang.Object ref = serviceAccount_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        serviceAccount_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The service account used for all user-controlled operations including
+     * UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+     * If no service account is set, then the standard Cloud Build service account
+     * ([PROJECT_NUM]&#64;system.gserviceaccount.com) will be used instead.
+     * Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+     * </pre>
+     *
+     * <code>string service_account = 33 [(.google.api.resource_reference) = { ... }</code>
+     *
+     * @param value The serviceAccount to set.
+     * @return This builder for chaining.
+     */
+    public Builder setServiceAccount(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      serviceAccount_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The service account used for all user-controlled operations including
+     * UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+     * If no service account is set, then the standard Cloud Build service account
+     * ([PROJECT_NUM]&#64;system.gserviceaccount.com) will be used instead.
+     * Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+     * </pre>
+     *
+     * <code>string service_account = 33 [(.google.api.resource_reference) = { ... }</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearServiceAccount() {
+
+      serviceAccount_ = getDefaultInstance().getServiceAccount();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The service account used for all user-controlled operations including
+     * UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+     * If no service account is set, then the standard Cloud Build service account
+     * ([PROJECT_NUM]&#64;system.gserviceaccount.com) will be used instead.
+     * Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+     * </pre>
+     *
+     * <code>string service_account = 33 [(.google.api.resource_reference) = { ... }</code>
+     *
+     * @param value The bytes for serviceAccount to set.
+     * @return This builder for chaining.
+     */
+    public Builder setServiceAccountBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      serviceAccount_ = value;
+      onChanged();
+      return this;
+    }
+
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
       return super.setUnknownFields(unknownFields);
diff --git a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildTriggerOrBuilder.java b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildTriggerOrBuilder.java
index 1560da45..18561d17 100644
--- a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildTriggerOrBuilder.java
+++ b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/BuildTriggerOrBuilder.java
@@ -747,5 +747,38 @@ public interface BuildTriggerOrBuilder
    */
   com.google.protobuf.ByteString getFilterBytes();
 
+  /**
+   *
+   *
+   * <pre>
+   * The service account used for all user-controlled operations including
+   * UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+   * If no service account is set, then the standard Cloud Build service account
+   * ([PROJECT_NUM]&#64;system.gserviceaccount.com) will be used instead.
+   * Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+   * </pre>
+   *
+   * <code>string service_account = 33 [(.google.api.resource_reference) = { ... }</code>
+   *
+   * @return The serviceAccount.
+   */
+  java.lang.String getServiceAccount();
+  /**
+   *
+   *
+   * <pre>
+   * The service account used for all user-controlled operations including
+   * UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+   * If no service account is set, then the standard Cloud Build service account
+   * ([PROJECT_NUM]&#64;system.gserviceaccount.com) will be used instead.
+   * Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+   * </pre>
+   *
+   * <code>string service_account = 33 [(.google.api.resource_reference) = { ... }</code>
+   *
+   * @return The bytes for serviceAccount.
+   */
+  com.google.protobuf.ByteString getServiceAccountBytes();
+
   public com.google.cloudbuild.v1.BuildTrigger.BuildTemplateCase getBuildTemplateCase();
 }
diff --git a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/Cloudbuild.java b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/Cloudbuild.java
index e4b5dfac..ed1609e7 100644
--- a/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/Cloudbuild.java
+++ b/proto-google-cloud-build-v1/src/main/java/com/google/cloudbuild/v1/Cloudbuild.java
@@ -357,7 +357,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "1.StorageSourceManifestH\000B\010\n\006source\"m\n\nB"
           + "uiltImage\022\014\n\004name\030\001 \001(\t\022\016\n\006digest\030\003 \001(\t\022"
           + "A\n\013push_timing\030\004 \001(\0132\'.google.devtools.c"
-          + "loudbuild.v1.TimeSpanB\003\340A\003\"\256\003\n\tBuildStep"
+          + "loudbuild.v1.TimeSpanB\003\340A\003\"\276\003\n\tBuildStep"
           + "\022\014\n\004name\030\001 \001(\t\022\013\n\003env\030\002 \003(\t\022\014\n\004args\030\003 \003("
           + "\t\022\013\n\003dir\030\004 \001(\t\022\n\n\002id\030\005 \001(\t\022\020\n\010wait_for\030\006"
           + " \003(\t\022\022\n\nentrypoint\030\007 \001(\t\022\022\n\nsecret_env\030\010"
@@ -368,465 +368,467 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "s.cloudbuild.v1.TimeSpanB\003\340A\003\022*\n\007timeout"
           + "\030\013 \001(\0132\031.google.protobuf.Duration\022@\n\006sta"
           + "tus\030\014 \001(\0162+.google.devtools.cloudbuild.v"
-          + "1.Build.StatusB\003\340A\003\"$\n\006Volume\022\014\n\004name\030\001 "
-          + "\001(\t\022\014\n\004path\030\002 \001(\t\"\357\001\n\007Results\0229\n\006images\030"
-          + "\002 \003(\0132).google.devtools.cloudbuild.v1.Bu"
-          + "iltImage\022\031\n\021build_step_images\030\003 \003(\t\022\031\n\021a"
-          + "rtifact_manifest\030\004 \001(\t\022\025\n\rnum_artifacts\030"
-          + "\005 \001(\003\022\032\n\022build_step_outputs\030\006 \003(\014\022@\n\017art"
-          + "ifact_timing\030\007 \001(\0132\'.google.devtools.clo"
-          + "udbuild.v1.TimeSpan\"`\n\016ArtifactResult\022\020\n"
-          + "\010location\030\001 \001(\t\022<\n\tfile_hash\030\002 \003(\0132).goo"
-          + "gle.devtools.cloudbuild.v1.FileHashes\"\240\022"
-          + "\n\005Build\022\021\n\004name\030- \001(\tB\003\340A\003\022\017\n\002id\030\001 \001(\tB\003"
-          + "\340A\003\022\027\n\nproject_id\030\020 \001(\tB\003\340A\003\022@\n\006status\030\002"
-          + " \001(\0162+.google.devtools.cloudbuild.v1.Bui"
-          + "ld.StatusB\003\340A\003\022\032\n\rstatus_detail\030\030 \001(\tB\003\340"
-          + "A\003\0225\n\006source\030\003 \001(\0132%.google.devtools.clo"
-          + "udbuild.v1.Source\0227\n\005steps\030\013 \003(\0132(.googl"
-          + "e.devtools.cloudbuild.v1.BuildStep\022<\n\007re"
-          + "sults\030\n \001(\0132&.google.devtools.cloudbuild"
-          + ".v1.ResultsB\003\340A\003\0224\n\013create_time\030\006 \001(\0132\032."
-          + "google.protobuf.TimestampB\003\340A\003\0223\n\nstart_"
-          + "time\030\007 \001(\0132\032.google.protobuf.TimestampB\003"
-          + "\340A\003\0224\n\013finish_time\030\010 \001(\0132\032.google.protob"
-          + "uf.TimestampB\003\340A\003\022*\n\007timeout\030\014 \001(\0132\031.goo"
-          + "gle.protobuf.Duration\022\016\n\006images\030\r \003(\t\022,\n"
-          + "\tqueue_ttl\030( \001(\0132\031.google.protobuf.Durat"
-          + "ion\022;\n\tartifacts\030% \001(\0132(.google.devtools"
-          + ".cloudbuild.v1.Artifacts\022\023\n\013logs_bucket\030"
-          + "\023 \001(\t\022O\n\021source_provenance\030\025 \001(\0132/.googl"
-          + "e.devtools.cloudbuild.v1.SourceProvenanc"
-          + "eB\003\340A\003\022\035\n\020build_trigger_id\030\026 \001(\tB\003\340A\003\022<\n"
-          + "\007options\030\027 \001(\0132+.google.devtools.cloudbu"
-          + "ild.v1.BuildOptions\022\024\n\007log_url\030\031 \001(\tB\003\340A"
-          + "\003\022N\n\rsubstitutions\030\035 \003(\01327.google.devtoo"
-          + "ls.cloudbuild.v1.Build.SubstitutionsEntr"
-          + "y\022\014\n\004tags\030\037 \003(\t\0226\n\007secrets\030  \003(\0132%.googl"
-          + "e.devtools.cloudbuild.v1.Secret\022E\n\006timin"
-          + "g\030! \003(\01320.google.devtools.cloudbuild.v1."
-          + "Build.TimingEntryB\003\340A\003\022C\n\010approval\030, \001(\013"
-          + "2,.google.devtools.cloudbuild.v1.BuildAp"
-          + "provalB\003\340A\003\022?\n\017service_account\030* \001(\tB&\372A"
-          + "#\n!iam.googleapis.com/ServiceAccount\022A\n\021"
-          + "available_secrets\030/ \001(\0132&.google.devtool"
-          + "s.cloudbuild.v1.Secrets\022C\n\010warnings\0301 \003("
-          + "\0132,.google.devtools.cloudbuild.v1.Build."
-          + "WarningB\003\340A\003\022K\n\014failure_info\0303 \001(\01320.goo"
-          + "gle.devtools.cloudbuild.v1.Build.Failure"
-          + "InfoB\003\340A\003\032\250\001\n\007Warning\022\014\n\004text\030\001 \001(\t\022G\n\010p"
-          + "riority\030\002 \001(\01625.google.devtools.cloudbui"
-          + "ld.v1.Build.Warning.Priority\"F\n\010Priority"
-          + "\022\030\n\024PRIORITY_UNSPECIFIED\020\000\022\010\n\004INFO\020\001\022\013\n\007"
-          + "WARNING\020\002\022\t\n\005ALERT\020\003\032\236\002\n\013FailureInfo\022J\n\004"
-          + "type\030\001 \001(\0162<.google.devtools.cloudbuild."
-          + "v1.Build.FailureInfo.FailureType\022\016\n\006deta"
-          + "il\030\002 \001(\t\"\262\001\n\013FailureType\022\034\n\030FAILURE_TYPE"
-          + "_UNSPECIFIED\020\000\022\017\n\013PUSH_FAILED\020\001\022\030\n\024PUSH_"
-          + "IMAGE_NOT_FOUND\020\002\022\027\n\023PUSH_NOT_AUTHORIZED"
-          + "\020\003\022\023\n\017LOGGING_FAILURE\020\004\022\023\n\017USER_BUILD_ST"
-          + "EP\020\005\022\027\n\023FETCH_SOURCE_FAILED\020\006\0324\n\022Substit"
-          + "utionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:"
-          + "\0028\001\032V\n\013TimingEntry\022\013\n\003key\030\001 \001(\t\0226\n\005value"
-          + "\030\002 \001(\0132\'.google.devtools.cloudbuild.v1.T"
-          + "imeSpan:\0028\001\"\231\001\n\006Status\022\022\n\016STATUS_UNKNOWN"
-          + "\020\000\022\013\n\007PENDING\020\n\022\n\n\006QUEUED\020\001\022\013\n\007WORKING\020\002"
-          + "\022\013\n\007SUCCESS\020\003\022\013\n\007FAILURE\020\004\022\022\n\016INTERNAL_E"
-          + "RROR\020\005\022\013\n\007TIMEOUT\020\006\022\r\n\tCANCELLED\020\007\022\013\n\007EX"
-          + "PIRED\020\t:\177\352A|\n\037cloudbuild.googleapis.com/"
-          + "Build\022!projects/{project}/builds/{build}"
-          + "\0226projects/{project}/locations/{location"
-          + "}/builds/{build}\"\330\001\n\tArtifacts\022\016\n\006images"
-          + "\030\001 \003(\t\022I\n\007objects\030\002 \001(\01328.google.devtool"
-          + "s.cloudbuild.v1.Artifacts.ArtifactObject"
-          + "s\032p\n\017ArtifactObjects\022\020\n\010location\030\001 \001(\t\022\r"
-          + "\n\005paths\030\002 \003(\t\022<\n\006timing\030\003 \001(\0132\'.google.d"
-          + "evtools.cloudbuild.v1.TimeSpanB\003\340A\003\"h\n\010T"
-          + "imeSpan\022.\n\nstart_time\030\001 \001(\0132\032.google.pro"
-          + "tobuf.Timestamp\022,\n\010end_time\030\002 \001(\0132\032.goog"
-          + "le.protobuf.Timestamp\"M\n\026BuildOperationM"
-          + "etadata\0223\n\005build\030\001 \001(\0132$.google.devtools"
-          + ".cloudbuild.v1.Build\"\303\003\n\020SourceProvenanc"
-          + "e\022M\n\027resolved_storage_source\030\003 \001(\0132,.goo"
-          + "gle.devtools.cloudbuild.v1.StorageSource"
-          + "\022G\n\024resolved_repo_source\030\006 \001(\0132).google."
-          + "devtools.cloudbuild.v1.RepoSource\022^\n res"
-          + "olved_storage_source_manifest\030\t \001(\01324.go"
-          + "ogle.devtools.cloudbuild.v1.StorageSourc"
-          + "eManifest\022Y\n\013file_hashes\030\004 \003(\0132?.google."
-          + "devtools.cloudbuild.v1.SourceProvenance."
-          + "FileHashesEntryB\003\340A\003\032\\\n\017FileHashesEntry\022"
-          + "\013\n\003key\030\001 \001(\t\0228\n\005value\030\002 \001(\0132).google.dev"
-          + "tools.cloudbuild.v1.FileHashes:\0028\001\"D\n\nFi"
-          + "leHashes\0226\n\tfile_hash\030\001 \003(\0132#.google.dev"
-          + "tools.cloudbuild.v1.Hash\"|\n\004Hash\022:\n\004type"
-          + "\030\001 \001(\0162,.google.devtools.cloudbuild.v1.H"
-          + "ash.HashType\022\r\n\005value\030\002 \001(\014\")\n\010HashType\022"
-          + "\010\n\004NONE\020\000\022\n\n\006SHA256\020\001\022\007\n\003MD5\020\002\"\222\001\n\007Secre"
-          + "ts\022J\n\016secret_manager\030\001 \003(\01322.google.devt"
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-          + "\n\006inline\030\002 \003(\0132+.google.devtools.cloudbu"
-          + "ild.v1.InlineSecret\"\305\001\n\014InlineSecret\022<\n\014"
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-          + "apis.com/CryptoKey\022H\n\007env_map\030\002 \003(\01327.go"
-          + "ogle.devtools.cloudbuild.v1.InlineSecret"
-          + ".EnvMapEntry\032-\n\013EnvMapEntry\022\013\n\003key\030\001 \001(\t"
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-          + "et\022E\n\014version_name\030\001 \001(\tB/\372A,\n*secretman"
-          + "ager.googleapis.com/SecretVersion\022\013\n\003env"
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-          + "H\n\nsecret_env\030\003 \003(\01324.google.devtools.cl"
-          + "oudbuild.v1.Secret.SecretEnvEntry\0320\n\016Sec"
-          + "retEnvEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\014:"
-          + "\0028\001\"\235\001\n\022CreateBuildRequest\0224\n\006parent\030\004 \001"
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-          + "\022\027\n\nproject_id\030\001 \001(\tB\003\340A\002\0228\n\005build\030\002 \001(\013"
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-          + "\037cloudbuild.googleapis.com/Build\022\027\n\nproj"
-          + "ect_id\030\001 \001(\tB\003\340A\002\022\021\n\tpage_size\030\002 \001(\005\022\022\n\n"
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-          + " \001(\tB\003\340A\002\"p\n\023ApproveBuildRequest\022\021\n\004name"
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-          + "iggersResponse\022=\n\010triggers\030\001 \003(\0132+.googl"
-          + "e.devtools.cloudbuild.v1.BuildTrigger\022\027\n"
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-          + "\002\"\220\001\n\031UpdateBuildTriggerRequest\022\027\n\nproje"
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+          + ".cloudbuild.v1.GetBuildRequest\032$.google."
+          + "devtools.cloudbuild.v1.Build\"k\202\323\344\223\002U\022%/v"
+          + "1/projects/{project_id}/builds/{id}Z,\022*/"
+          + "v1/{name=projects/*/locations/*/builds/*"
+          + "}\332A\rproject_id,id\022\335\001\n\nListBuilds\0220.googl"
+          + "e.devtools.cloudbuild.v1.ListBuildsReque"
+          + "st\0321.google.devtools.cloudbuild.v1.ListB"
+          + "uildsResponse\"j\202\323\344\223\002P\022 /v1/projects/{pro"
+          + "ject_id}/buildsZ,\022*/v1/{parent=projects/"
+          + "*/locations/*}/builds\332A\021project_id,filte"
+          + "r\022\347\001\n\013CancelBuild\0221.google.devtools.clou"
+          + "dbuild.v1.CancelBuildRequest\032$.google.de"
+          + "vtools.cloudbuild.v1.Build\"\177\202\323\344\223\002i\",/v1/"
+          + "projects/{project_id}/builds/{id}:cancel"
+          + ":\001*Z6\"1/v1/{name=projects/*/locations/*/"
+          + "builds/*}:cancel:\001*\332A\rproject_id,id\022\377\001\n\n"
+          + "RetryBuild\0220.google.devtools.cloudbuild.",
+      "v1.RetryBuildRequest\032\035.google.longrunnin"
+          + "g.Operation\"\237\001\202\323\344\223\002g\"+/v1/projects/{proj"
+          + "ect_id}/builds/{id}:retry:\001*Z5\"0/v1/{nam"
+          + "e=projects/*/locations/*/builds/*}:retry"
+          + ":\001*\332A\rproject_id,id\312A\037\n\005Build\022\026BuildOper"
+          + "ationMetadata\022\207\002\n\014ApproveBuild\0222.google."
+          + "devtools.cloudbuild.v1.ApproveBuildReque"
+          + "st\032\035.google.longrunning.Operation\"\243\001\202\323\344\223"
+          + "\002d\"&/v1/{name=projects/*/builds/*}:appro"
+          + "ve:\001*Z7\"2/v1/{name=projects/*/locations/"
+          + "*/builds/*}:approve:\001*\332A\024name,approval_r"
+          + "esult\312A\037\n\005Build\022\026BuildOperationMetadata\022"
+          + "\377\001\n\022CreateBuildTrigger\0228.google.devtools"
+          + ".cloudbuild.v1.CreateBuildTriggerRequest"
+          + "\032+.google.devtools.cloudbuild.v1.BuildTr"
+          + "igger\"\201\001\202\323\344\223\002f\"\"/v1/projects/{project_id"
+          + "}/triggers:\007triggerZ7\",/v1/{parent=proje"
+          + "cts/*/locations/*}/triggers:\007trigger\332A\022p"
+          + "roject_id,trigger\022\366\001\n\017GetBuildTrigger\0225."
+          + "google.devtools.cloudbuild.v1.GetBuildTr"
+          + "iggerRequest\032+.google.devtools.cloudbuil"
+          + "d.v1.BuildTrigger\"\177\202\323\344\223\002a\022//v1/projects/"
+          + "{project_id}/triggers/{trigger_id}Z.\022,/v"
+          + "1/{name=projects/*/locations/*/triggers/"
+          + "*}\332A\025project_id,trigger_id\022\357\001\n\021ListBuild"
+          + "Triggers\0227.google.devtools.cloudbuild.v1"
+          + ".ListBuildTriggersRequest\0328.google.devto"
+          + "ols.cloudbuild.v1.ListBuildTriggersRespo"
+          + "nse\"g\202\323\344\223\002T\022\"/v1/projects/{project_id}/t"
+          + "riggersZ.\022,/v1/{parent=projects/*/locati"
+          + "ons/*}/triggers\332A\nproject_id\022\347\001\n\022DeleteB"
+          + "uildTrigger\0228.google.devtools.cloudbuild"
+          + ".v1.DeleteBuildTriggerRequest\032\026.google.p"
+          + "rotobuf.Empty\"\177\202\323\344\223\002a*//v1/projects/{pro"
+          + "ject_id}/triggers/{trigger_id}Z.*,/v1/{n"
+          + "ame=projects/*/locations/*/triggers/*}\332A"
+          + "\025project_id,trigger_id\022\251\002\n\022UpdateBuildTr"
+          + "igger\0228.google.devtools.cloudbuild.v1.Up"
+          + "dateBuildTriggerRequest\032+.google.devtool"
+          + "s.cloudbuild.v1.BuildTrigger\"\253\001\202\323\344\223\002\204\0012/"
+          + "/v1/projects/{project_id}/triggers/{trig"
+          + "ger_id}:\007triggerZH2=/v1/{trigger.resourc"
+          + "e_name=projects/*/locations/*/triggers/*"
+          + "}:\007trigger\332A\035project_id,trigger_id,trigg"
+          + "er\022\245\002\n\017RunBuildTrigger\0225.google.devtools"
+          + ".cloudbuild.v1.RunBuildTriggerRequest\032\035."
+          + "google.longrunning.Operation\"\273\001\202\323\344\223\002t\"3/"
           + "v1/projects/{project_id}/triggers/{trigg"
-          + "er_id}:\007triggerZH2=/v1/{trigger.resource"
-          + "_name=projects/*/locations/*/triggers/*}"
-          + ":\007trigger\332A\035project_id,trigger_id,trigge"
-          + "r\022\245\002\n\017RunBuildTrigger\0225.google.devtools."
-          + "cloudbuild.v1.RunBuildTriggerRequest\032\035.g"
-          + "oogle.longrunning.Operation\"\273\001\202\323\344\223\002t\"3/v"
-          + "1/projects/{project_id}/triggers/{trigge"
-          + "r_id}:run:\006sourceZ5\"0/v1/{name=projects/"
-          + "*/locations/*/triggers/*}:run:\001*\332A\034proje"
-          + "ct_id,trigger_id,source\312A\037\n\005Build\022\026Build"
-          + "OperationMetadata\022\225\002\n\025ReceiveTriggerWebh"
-          + "ook\022;.google.devtools.cloudbuild.v1.Rece"
-          + "iveTriggerWebhookRequest\032<.google.devtoo"
-          + "ls.cloudbuild.v1.ReceiveTriggerWebhookRe"
-          + "sponse\"\200\001\202\323\344\223\002z\"4/v1/projects/{project_i"
-          + "d}/triggers/{trigger}:webhook:\004bodyZ<\"4/"
-          + "v1/{name=projects/*/locations/*/triggers"
-          + "/*}:webhook:\004body\022\206\002\n\020CreateWorkerPool\0226"
-          + ".google.devtools.cloudbuild.v1.CreateWor"
-          + "kerPoolRequest\032\035.google.longrunning.Oper"
-          + "ation\"\232\001\202\323\344\223\002>\"//v1/{parent=projects/*/l"
-          + "ocations/*}/workerPools:\013worker_pool\332A!p"
-          + "arent,worker_pool,worker_pool_id\312A/\n\nWor"
-          + "kerPool\022!CreateWorkerPoolOperationMetada"
-          + "ta\022\257\001\n\rGetWorkerPool\0223.google.devtools.c"
-          + "loudbuild.v1.GetWorkerPoolRequest\032).goog"
-          + "le.devtools.cloudbuild.v1.WorkerPool\">\202\323"
-          + "\344\223\0021\022//v1/{name=projects/*/locations/*/w"
-          + "orkerPools/*}\332A\004name\022\346\001\n\020DeleteWorkerPoo"
-          + "l\0226.google.devtools.cloudbuild.v1.Delete"
-          + "WorkerPoolRequest\032\035.google.longrunning.O"
-          + "peration\"{\202\323\344\223\0021*//v1/{name=projects/*/l"
-          + "ocations/*/workerPools/*}\332A\004name\312A:\n\025goo"
-          + "gle.protobuf.Empty\022!DeleteWorkerPoolOper"
-          + "ationMetadata\022\210\002\n\020UpdateWorkerPool\0226.goo"
-          + "gle.devtools.cloudbuild.v1.UpdateWorkerP"
-          + "oolRequest\032\035.google.longrunning.Operatio"
-          + "n\"\234\001\202\323\344\223\002J2;/v1/{worker_pool.name=projec"
-          + "ts/*/locations/*/workerPools/*}:\013worker_"
-          + "pool\332A\027worker_pool,update_mask\312A/\n\nWorke"
-          + "rPool\022!UpdateWorkerPoolOperationMetadata"
-          + "\022\302\001\n\017ListWorkerPools\0225.google.devtools.c"
-          + "loudbuild.v1.ListWorkerPoolsRequest\0326.go"
-          + "ogle.devtools.cloudbuild.v1.ListWorkerPo"
-          + "olsResponse\"@\202\323\344\223\0021\022//v1/{parent=project"
-          + "s/*/locations/*}/workerPools\332A\006parent\032M\312"
-          + "A\031cloudbuild.googleapis.com\322A.https://ww"
-          + "w.googleapis.com/auth/cloud-platformB\222\006\n"
-          + "\030com.google.cloudbuild.v1P\001ZGgoogle.gola"
-          + "ng.org/genproto/googleapis/devtools/clou"
-          + "dbuild/v1;cloudbuild\242\002\003GCB\252\002\032Google.Clou"
-          + "d.CloudBuild.V1\352\002\030Google::Cloud::Build::"
-          + "V1\352AN\n\036compute.googleapis.com/Network\022,p"
-          + "rojects/{project}/global/networks/{netwo"
-          + "rk}\352AY\n!iam.googleapis.com/ServiceAccoun"
-          + "t\0224projects/{project}/serviceAccounts/{s"
-          + "ervice_account}\352AJ\n#secretmanager.google"
-          + "apis.com/Secret\022#projects/{project}/secr"
-          + "ets/{secret}\352Ad\n*secretmanager.googleapi"
-          + "s.com/SecretVersion\0226projects/{project}/"
-          + "secrets/{secret}/versions/{version}\352Ap\n!"
-          + "cloudkms.googleapis.com/CryptoKey\022Kproje"
-          + "cts/{project}/locations/{location}/keyRi"
-          + "ngs/{keyring}/cryptoKeys/{key}\352AU\n\"pubsu"
-          + "b.googleapis.com/Subscription\022/projects/"
-          + "{project}/subscriptions/{subscription}\352A"
-          + "@\n\033pubsub.googleapis.com/Topic\022!projects"
-          + "/{project}/topics/{topic}b\006proto3"
+          + "er_id}:run:\006sourceZ5\"0/v1/{name=projects"
+          + "/*/locations/*/triggers/*}:run:\001*\332A\034proj"
+          + "ect_id,trigger_id,source\312A\037\n\005Build\022\026Buil"
+          + "dOperationMetadata\022\225\002\n\025ReceiveTriggerWeb"
+          + "hook\022;.google.devtools.cloudbuild.v1.Rec"
+          + "eiveTriggerWebhookRequest\032<.google.devto"
+          + "ols.cloudbuild.v1.ReceiveTriggerWebhookR"
+          + "esponse\"\200\001\202\323\344\223\002z\"4/v1/projects/{project_"
+          + "id}/triggers/{trigger}:webhook:\004bodyZ<\"4"
+          + "/v1/{name=projects/*/locations/*/trigger"
+          + "s/*}:webhook:\004body\022\206\002\n\020CreateWorkerPool\022"
+          + "6.google.devtools.cloudbuild.v1.CreateWo"
+          + "rkerPoolRequest\032\035.google.longrunning.Ope"
+          + "ration\"\232\001\202\323\344\223\002>\"//v1/{parent=projects/*/"
+          + "locations/*}/workerPools:\013worker_pool\332A!"
+          + "parent,worker_pool,worker_pool_id\312A/\n\nWo"
+          + "rkerPool\022!CreateWorkerPoolOperationMetad"
+          + "ata\022\257\001\n\rGetWorkerPool\0223.google.devtools."
+          + "cloudbuild.v1.GetWorkerPoolRequest\032).goo"
+          + "gle.devtools.cloudbuild.v1.WorkerPool\">\202"
+          + "\323\344\223\0021\022//v1/{name=projects/*/locations/*/"
+          + "workerPools/*}\332A\004name\022\346\001\n\020DeleteWorkerPo"
+          + "ol\0226.google.devtools.cloudbuild.v1.Delet"
+          + "eWorkerPoolRequest\032\035.google.longrunning."
+          + "Operation\"{\202\323\344\223\0021*//v1/{name=projects/*/"
+          + "locations/*/workerPools/*}\332A\004name\312A:\n\025go"
+          + "ogle.protobuf.Empty\022!DeleteWorkerPoolOpe"
+          + "rationMetadata\022\210\002\n\020UpdateWorkerPool\0226.go"
+          + "ogle.devtools.cloudbuild.v1.UpdateWorker"
+          + "PoolRequest\032\035.google.longrunning.Operati"
+          + "on\"\234\001\202\323\344\223\002J2;/v1/{worker_pool.name=proje"
+          + "cts/*/locations/*/workerPools/*}:\013worker"
+          + "_pool\332A\027worker_pool,update_mask\312A/\n\nWork"
+          + "erPool\022!UpdateWorkerPoolOperationMetadat"
+          + "a\022\302\001\n\017ListWorkerPools\0225.google.devtools."
+          + "cloudbuild.v1.ListWorkerPoolsRequest\0326.g"
+          + "oogle.devtools.cloudbuild.v1.ListWorkerP"
+          + "oolsResponse\"@\202\323\344\223\0021\022//v1/{parent=projec"
+          + "ts/*/locations/*}/workerPools\332A\006parent\032M"
+          + "\312A\031cloudbuild.googleapis.com\322A.https://w"
+          + "ww.googleapis.com/auth/cloud-platformB\222\006"
+          + "\n\030com.google.cloudbuild.v1P\001ZGgoogle.gol"
+          + "ang.org/genproto/googleapis/devtools/clo"
+          + "udbuild/v1;cloudbuild\242\002\003GCB\252\002\032Google.Clo"
+          + "ud.CloudBuild.V1\352\002\030Google::Cloud::Build:"
+          + ":V1\352AN\n\036compute.googleapis.com/Network\022,"
+          + "projects/{project}/global/networks/{netw"
+          + "ork}\352AY\n!iam.googleapis.com/ServiceAccou"
+          + "nt\0224projects/{project}/serviceAccounts/{"
+          + "service_account}\352AJ\n#secretmanager.googl"
+          + "eapis.com/Secret\022#projects/{project}/sec"
+          + "rets/{secret}\352Ad\n*secretmanager.googleap"
+          + "is.com/SecretVersion\0226projects/{project}"
+          + "/secrets/{secret}/versions/{version}\352Ap\n"
+          + "!cloudkms.googleapis.com/CryptoKey\022Kproj"
+          + "ects/{project}/locations/{location}/keyR"
+          + "ings/{keyring}/cryptoKeys/{key}\352AU\n\"pubs"
+          + "ub.googleapis.com/Subscription\022/projects"
+          + "/{project}/subscriptions/{subscription}\352"
+          + "A@\n\033pubsub.googleapis.com/Topic\022!project"
+          + "s/{project}/topics/{topic}b\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
@@ -934,6 +936,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "PullTiming",
               "Timeout",
               "Status",
+              "Script",
             });
     internal_static_google_devtools_cloudbuild_v1_Volume_descriptor =
         getDescriptor().getMessageTypes().get(8);
@@ -1247,6 +1250,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "IgnoredFiles",
               "IncludedFiles",
               "Filter",
+              "ServiceAccount",
               "BuildTemplate",
             });
     internal_static_google_devtools_cloudbuild_v1_BuildTrigger_SubstitutionsEntry_descriptor =
diff --git a/proto-google-cloud-build-v1/src/main/proto/google/devtools/cloudbuild/v1/cloudbuild.proto b/proto-google-cloud-build-v1/src/main/proto/google/devtools/cloudbuild/v1/cloudbuild.proto
index 6a932bae..3f980c7b 100644
--- a/proto-google-cloud-build-v1/src/main/proto/google/devtools/cloudbuild/v1/cloudbuild.proto
+++ b/proto-google-cloud-build-v1/src/main/proto/google/devtools/cloudbuild/v1/cloudbuild.proto
@@ -597,6 +597,11 @@ message BuildStep {
   // only updated on build completion; step status is not updated in real-time
   // as the build progresses.
   Build.Status status = 12 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // A shell script to be executed in the step.
+  //
+  // When script is provided, the user cannot specify the entrypoint or args.
+  string script = 19;
 }
 
 // Volume describes a Docker container volume which is mounted into build steps
@@ -1372,6 +1377,15 @@ message BuildTrigger {
 
   // Optional. A Common Expression Language string.
   string filter = 30 [(google.api.field_behavior) = OPTIONAL];
+
+  // The service account used for all user-controlled operations including
+  // UpdateBuildTrigger, RunBuildTrigger, CreateBuild, and CancelBuild.
+  // If no service account is set, then the standard Cloud Build service account
+  // ([PROJECT_NUM]@system.gserviceaccount.com) will be used instead.
+  // Format: `projects/{PROJECT_ID}/serviceAccounts/{ACCOUNT_ID_OR_EMAIL}`
+  string service_account = 33 [(google.api.resource_reference) = {
+    type: "iam.googleapis.com/ServiceAccount"
+  }];
 }
 
 // GitHubEventsConfig describes the configuration of a trigger that creates a