Add script field in cloud build trigger

.changelog/6701.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+cloudbuild: added `script` field to `google_cloudbuild_trigger` resource
+```

google/resource_cloudbuild_trigger.go

@@ -201,6 +201,12 @@ The elements are of the form "KEY=VALUE" for the environment variable
 										Optional: true,
 										Description: `Unique identifier for this build step, used in 'wait_for' to
 reference this build step as a dependency.`,
+									},
+									"script": {
+										Type:     schema.TypeString,
+										Optional: true,
+										Description: `A shell script to be executed in the step. 
+When script is provided, the user cannot specify the entrypoint or args.`,
 									},
 									"secret_env": {
 										Type:     schema.TypeList,
@@ -2172,6 +2178,7 @@ func flattenCloudBuildTriggerBuildStep(v interface{}, d *schema.ResourceData, co
 			"timing":     flattenCloudBuildTriggerBuildStepTiming(original["timing"], d, config),
 			"volumes":    flattenCloudBuildTriggerBuildStepVolumes(original["volumes"], d, config),
 			"wait_for":   flattenCloudBuildTriggerBuildStepWaitFor(original["waitFor"], d, config),
+			"script":     flattenCloudBuildTriggerBuildStepScript(original["script"], d, config),
 		})
 	}
 	return transformed
@@ -2243,6 +2250,10 @@ func flattenCloudBuildTriggerBuildStepWaitFor(v interface{}, d *schema.ResourceD
 	return v
 }
 
+func flattenCloudBuildTriggerBuildStepScript(v interface{}, d *schema.ResourceData, config *Config) interface{} {
+	return v
+}
+
 func flattenCloudBuildTriggerBuildArtifacts(v interface{}, d *schema.ResourceData, config *Config) interface{} {
 	if v == nil {
 		return nil
@@ -3413,6 +3424,13 @@ func expandCloudBuildTriggerBuildStep(v interface{}, d TerraformResourceData, co
 			transformed["waitFor"] = transformedWaitFor
 		}
 
+		transformedScript, err := expandCloudBuildTriggerBuildStepScript(original["script"], d, config)
+		if err != nil {
+			return nil, err
+		} else if val := reflect.ValueOf(transformedScript); val.IsValid() && !isEmptyValue(val) {
+			transformed["script"] = transformedScript
+		}
+
 		req = append(req, transformed)
 	}
 	return req, nil
@@ -3495,6 +3513,10 @@ func expandCloudBuildTriggerBuildStepWaitFor(v interface{}, d TerraformResourceD
 	return v, nil
 }
 
+func expandCloudBuildTriggerBuildStepScript(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
+	return v, nil
+}
+
 func expandCloudBuildTriggerBuildArtifacts(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
 	l := v.([]interface{})
 	if len(l) == 0 || l[0] == nil {

google/resource_cloudbuild_trigger_generated_test.go

@@ -111,6 +111,11 @@ resource "google_cloudbuild_trigger" "build-trigger" {
       secret_env = ["MY_SECRET"]
     }
 
+    step {
+      name   = "ubuntu"
+      script = "echo hello" # using script field
+    }
+
     source {
       storage_source {
         bucket = "mybucket"

website/docs/r/cloudbuild_trigger.html.markdown

@@ -81,6 +81,11 @@ resource "google_cloudbuild_trigger" "build-trigger" {
       secret_env = ["MY_SECRET"]
     }
 
+    step {
+      name   = "ubuntu"
+      script = "echo hello" # using script field
+    }
+
     source {
       storage_source {
         bucket = "mybucket"
@@ -908,6 +913,11 @@ The following arguments are supported:
   will start when all previous build steps in the `Build.Steps` list
   have completed successfully.
 
+* `script` -
+  (Optional)
+  A shell script to be executed in the step. 
+  When script is provided, the user cannot specify the entrypoint or args.
+
 
 <a name="nested_volumes"></a>The `volumes` block supports: