fix: #287 don't include Tags property if no tags provided

README.md

@@ -980,6 +980,25 @@ stepFunctions:
 
 You can specify tags on each state machine. Additionally any global tags (specified under `provider` section in your `serverless.yml`) would be merged in as well.
 
+If you _don't_ want for global tags to be merged into your state machine, you can include the `inheritGlobalTags` property for your state machine.
+
+```yaml
+provider:
+  tags:
+    app: myApp
+    department: engineering
+stepFunctions:
+  stateMachines:
+    hellostepfunc1:
+      name: myStateMachine
+      inheritGlobalTags: false
+      tags:
+        score: 42
+      definition: something
+```
+
+As a result, `hellostepfunc1` will only have the tag of `score: 42`, and _not_ the tags at the provider level
+
 ## Commands
 
 ### deploy

lib/deploy/stepFunctions/compileStateMachines.js

@@ -99,7 +99,12 @@ module.exports = {
         let RoleArn;
         let DependsOn = [];
         let LoggingConfiguration;
-        const Tags = toTags(this.serverless.service.provider.tags);
+        let Tags;
+        if (stateMachineObj.inheritGlobalTags === false) {
+          Tags = [];
+        } else {
+          Tags = toTags(this.serverless.service.provider.tags);
+        }
 
         const { error, value } = Joi.validate(stateMachineObj, schema, { allowUnknown: false });
         if (error) {
@@ -202,17 +207,20 @@ module.exports = {
 
         const stateMachineOutputLogicalId = this
           .getStateMachineOutputLogicalId(stateMachineName, stateMachineObj);
+
         const stateMachineTemplate = {
           Type: 'AWS::StepFunctions::StateMachine',
           Properties: {
             DefinitionString,
             RoleArn,
-            Tags,
             StateMachineType: stateMachineObj.type,
             LoggingConfiguration,
           },
           DependsOn,
         };
+        if (Tags.length > 0) {
+          stateMachineTemplate.Properties.Tags = Tags;
+        }
 
         const newStateMachineObject = {
           [stateMachineLogicalId]: stateMachineTemplate,

lib/deploy/stepFunctions/compileStateMachines.schema.js

@@ -21,6 +21,8 @@ const definition = Joi.alternatives().try(
   Joi.object(),
 );
 
+const inheritGlobalTags = Joi.boolean();
+
 const dependsOn = Joi.alternatives().try(
   Joi.string(),
   Joi.array().items(Joi.string()),
@@ -54,6 +56,7 @@ const schema = Joi.object().keys({
   notifications,
   type,
   loggingConfig,
+  inheritGlobalTags,
 });
 
 module.exports = schema;

lib/deploy/stepFunctions/compileStateMachines.test.js

@@ -546,6 +546,76 @@ describe('#compileStateMachines', () => {
       .to.deep.eq([{ Key: 'team', Value: 'core' }, { Key: 'score', Value: '42' }]);
   });
 
+  it('should not add tags property to state machine if none are provided', () => {
+    serverless.service.stepFunctions = {
+      stateMachines: {
+        myStateMachine1: {
+          definition: 'definition1',
+          name: 'stateMachineBeta1',
+        },
+      },
+    };
+    serverlessStepFunctions.compileStateMachines();
+    const stateMachineBeta1 = serverlessStepFunctions.serverless.service
+      .provider.compiledCloudFormationTemplate.Resources
+      .StateMachineBeta1;
+    expect(stateMachineBeta1.Properties).to.not.have.property('Tags');
+  });
+
+  it('should not inherit global tags if inheritGlobalTags is set to false', () => {
+    serverless.service.provider.tags = {
+      team: 'core',
+    };
+
+    serverless.service.stepFunctions = {
+      stateMachines: {
+        myStateMachine1: {
+          definition: 'definition1',
+          name: 'stateMachineBeta1',
+          inheritGlobalTags: false,
+          tags: {
+            score: 42,
+          },
+        },
+        myStateMachine2: {
+          definition: 'definition2',
+          name: 'stateMachineBeta2',
+          tags: {
+            score: 42,
+          },
+        },
+        myStateMachine3: {
+          definition: 'definition3',
+          name: 'stateMachineBeta3',
+          inheritGlobalTags: true,
+          tags: {
+            question: 'Meaning of life',
+            answer: 42,
+          },
+        },
+      },
+    };
+    serverlessStepFunctions.compileStateMachines();
+    const stateMachineBeta1 = serverlessStepFunctions.serverless.service
+      .provider.compiledCloudFormationTemplate.Resources
+      .StateMachineBeta1;
+    const stateMachineBeta2 = serverlessStepFunctions.serverless.service
+      .provider.compiledCloudFormationTemplate.Resources
+      .StateMachineBeta2;
+    const stateMachineBeta3 = serverlessStepFunctions.serverless.service
+      .provider.compiledCloudFormationTemplate.Resources
+      .StateMachineBeta3;
+    expect(stateMachineBeta1.Properties.Tags).to.have.lengthOf(1);
+    expect(stateMachineBeta2.Properties.Tags).to.have.lengthOf(2);
+    expect(stateMachineBeta3.Properties.Tags).to.have.lengthOf(3);
+    expect(stateMachineBeta1.Properties.Tags)
+      .to.deep.eq([{ Key: 'score', Value: '42' }]);
+    expect(stateMachineBeta2.Properties.Tags)
+      .to.deep.eq([{ Key: 'team', Value: 'core' }, { Key: 'score', Value: '42' }]);
+    expect(stateMachineBeta3.Properties.Tags)
+      .to.deep.eq([{ Key: 'team', Value: 'core' }, { Key: 'question', Value: 'Meaning of life' }, { Key: 'answer', Value: '42' }]);
+  });
+
   it('should throw error when tags property contains malformed tags', () => {
     serverless.service.stepFunctions = {
       stateMachines: {