Build in a docker image and add a template.yaml for sam local testing.

.gitignore

@@ -115,6 +115,9 @@ cabal.project.local~
 # CMake
 cmake-build-*/
 
+# Nix
+result/
+
 # Mongo Explorer plugin
 .idea/**/mongoSettings.xml
 

README.md

@@ -1 +1,22 @@
 # aws-lambda-runtime
+
+## Local Testing
+
+### Dependencies
+
+- stack
+- docker
+- aws-sam-cli (>v0.8.0)
+
+### Build
+
+```bash
+stack build
+cp .stack-work/install/x86_64-linux-${docker_image_hash}/lts-12.21/8.4.4/bin/aws-lambda-runtime result/bootstrap
+```
+
+### Execute
+
+```bash
+echo '{ "value": 7 }' | sam local invoke --region us-east-1
+```

package.yaml

@@ -8,6 +8,9 @@ category:            Web,AWS
 extra-source-files:
 - README.md
 
+docker:
+  enable: true
+
 dependencies:
   - base >= 4.7 && < 5
   - req

src/Main.hs

@@ -1,5 +1,6 @@
 module Main where
 
+import Control.Monad (forever)
 import Control.Monad.IO.Class
 import Data.Aeson
 import Data.ByteString.Char8 hiding (putStrLn)
@@ -18,7 +19,7 @@ instance ToJSON HardCodedEvent
 instance FromJSON HardCodedEvent
 
 main :: IO ()
-main = runReq def $ do
+main = forever $ runReq def $ do
   -- Retreive settings
   awsLambdaRuntimeApi <- liftIO $ getEnv "AWS_LAMBDA_RUNTIME_API"
   -- TODO: Is baseOptions an appropriate way to get/pass the port?

template.yaml

@@ -0,0 +1,13 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Transform: 'AWS::Serverless-2016-10-31'
+Description: Test for the Haskell Runtime.
+Resources:
+  helloworld:
+    Type: 'AWS::Serverless::Function'
+    Properties:
+      Handler: NOT_USED
+      Runtime: provided
+      CodeUri: result
+      Description: Test for the Haskell Runtime.
+      MemorySize: 128
+      Timeout: 3