Merge pull request #1070 from travis-ci/sf-lambda-layers

add lambda --layers (see #933)

lib/dpl/providers/lambda.rb

@@ -34,6 +34,7 @@ class Lambda < Provider
       opt '--dead_letter_arn ARN',    'ARN to an SNS or SQS resource used for the dead letter queue.'
       opt '--kms_key_arn ARN',        'KMS key ARN to use to encrypt environment_variables.'
       opt '--tracing_mode MODE',      'Tracing mode', default: 'PassThrough', enum: %w(Active PassThrough), note: 'Needs xray:PutTraceSegments xray:PutTelemetryRecords on the role'
+      opt '--layers LAYERS',          'Function layer arns', type: :array
       opt '--function_tags TAGS',     'List of tags to add to the function', type: :array, format: /[\w\-]+=.+/, note: 'Can be encrypted for added security'
       opt '--publish',                'Create a new version of the code instead of replacing the existing one.'
       opt '--zip PATH',               'Path to a packaged Lambda, a directory to package, or a single file to package', default: '.'
@@ -107,7 +108,8 @@ def function_config
             runtime: runtime,
             dead_letter_config: dead_letter_arn,
             kms_key_arn: kms_key_arn,
-            tracing_config: tracing_mode
+            tracing_config: tracing_config,
+            layers: layers
           )
         end
 
@@ -146,8 +148,8 @@ def dead_letter_arn
           { target_arn: super } if dead_letter_arn?
         end
 
-        def tracing_mode
-          { mode: super } if tracing_mode?
+        def tracing_config
+          { mode: tracing_mode } if tracing_mode?
         end
 
         def function_tags

spec/dpl/providers/lambda_spec.rb

@@ -193,6 +193,10 @@
     describe 'given --function_tags key=value' do
       it { should have_called :tag_resource, Tags: { key: 'value' } }
     end
+
+    describe 'given --layers one --layers two' do
+      it { should have_called :update_function_config, Layers: %w(one two) }
+    end
   end
 
   describe 'with ~/.aws/credentials' do