Make sourceContext optional (#427)

In cases where a self-hosted runner is being used, the source code may
be baked into the runner. In those cases, an additional source step is
unnecessary.

CHANGELOG_PENDING.md

@@ -1,5 +1,10 @@
 ### Improvements
 
+- Make SourceContext optional in DeploymentSettings [#427](https://github.com/pulumi/pulumi-pulumiservice/pulls/427)
+
+  In some advanced use cases, for example if your source code is baked into a custom image, or you are obtaining 
+  the source code from a different source, you may not want to specify a `SourceContext` in your `DeploymentSettings`.
+
 ### Bug Fixes
 
 ### Miscellaneous

examples/examples_yaml_test.go

@@ -208,6 +208,43 @@ func TestYamlDeploymentSettingsExample(t *testing.T) {
 	})
 }
 
+func TestYamlDeploymentSettingsNoSourceExample(t *testing.T) {
+
+	// Set up tmpdir with a Pulumi.yml with no resources
+	// mimicking the deletion of resource
+	newProgram := YamlProgram{
+		Name:    "yaml-deployment-settings-example-no-source",
+		Runtime: "yaml",
+	}
+
+	tmpdir := writePulumiYaml(t, newProgram)
+
+	cwd, _ := os.Getwd()
+	digits := generateRandomFiveDigits()
+
+	integration.ProgramTest(t, &integration.ProgramTestOptions{
+		Quick:     true,
+		Dir:       path.Join(cwd, ".", "yaml-deployment-settings-no-source"),
+		StackName: "test-stack-" + digits,
+		Config: map[string]string{
+			"digits": digits,
+		},
+		PrepareProject: func(_ *engine.Projinfo) error {
+			return nil
+		},
+		EditDirs: []integration.EditDir{
+			{
+				Dir: tmpdir,
+			},
+			// Reapply the same thing again, except this time we expect there to be no changes
+			{
+				Dir:             tmpdir,
+				ExpectNoChanges: true,
+			},
+		},
+	})
+}
+
 func TestYamlTeamAccessTokenExample(t *testing.T) {
 	cwd, _ := os.Getwd()
 	integration.ProgramTest(t, &integration.ProgramTestOptions{

examples/yaml-deployment-settings-no-source/Pulumi.yaml

@@ -0,0 +1,16 @@
+name: yaml-deployment-settings-example
+runtime: yaml
+description: Deployment settings test
+resources:
+  my_settings:
+    type: pulumiservice:DeploymentSettings
+    properties:
+      organization: service-provider-test-org
+      project: yaml-deployment-settings-example
+      stack: test-stack-${digits}
+      operationContext:
+        preRunCommands:
+          - yarn
+          - ls -al
+        environmentVariables:
+          TEST_VAR: "test-value"

provider/cmd/pulumi-resource-pulumiservice/schema.json

@@ -578,7 +578,7 @@
           "value": "admin"
         }
       ]
-    }, 
+    },
     "pulumiservice:index:TemplateSourceDestination": {
       "type": "object",
       "properties": {
@@ -1070,8 +1070,7 @@
       "required": [
         "organization",
         "project",
-        "stack",
-        "sourceContext"
+        "stack"
       ],
       "inputProperties": {
         "organization": {
@@ -1110,8 +1109,7 @@
       "requiredInputs": [
         "organization",
         "project",
-        "stack",
-        "sourceContext"
+        "stack"
       ]
     },
     "pulumiservice:index:StackTag": {