fix(lambda-nodejs): Required auto prefix of handler with index. breaks custom non-index handler settings used by layers

packages/@aws-cdk/aws-lambda-nodejs/README.md

@@ -53,6 +53,10 @@ new nodejs.NodejsFunction(this, 'MyFunction', {
 });
 ```
 
+The handler value will be automatically prefixed with the bundled output file name, `index.`,
+unless the handler value contains a `.` character, in which case the handler value is used as-is to
+allow for values needed by some Lambda extensions.
+
 For monorepos, the reference architecture becomes:
 
 ```plaintext

packages/@aws-cdk/aws-lambda-nodejs/lib/function.ts

@@ -25,6 +25,9 @@ export interface NodejsFunctionProps extends lambda.FunctionOptions {
   /**
    * The name of the exported handler in the entry file.
    *
+   * The handler is prefixed with `index.` unless the specified handler value contains a `.`,
+   * in which case it is used as-is.
+   *
    * @default handler
    */
   readonly handler?: string;
@@ -108,7 +111,7 @@ export class NodejsFunction extends lambda.Function {
         depsLockFilePath,
         projectRoot,
       }),
-      handler: `index.${handler}`,
+      handler: handler.indexOf('.') !== -1 ? `${handler}` : `index.${handler}`,
     });
 
     // Enable connection reuse for aws-sdk

packages/@aws-cdk/aws-lambda-nodejs/test/function.test.ts

@@ -45,6 +45,38 @@ test('NodejsFunction with .ts handler', () => {
   });
 });
 
+test('NodejsFunction with overridden handler - no dots', () => {
+  // WHEN
+  new NodejsFunction(stack, 'handler1', {
+    handler: 'myHandler',
+  });
+
+  expect(Bundling.bundle).toHaveBeenCalledWith(expect.objectContaining({
+    entry: expect.stringContaining('function.test.handler1.ts'), // Automatically finds .ts handler file
+  }));
+
+  Template.fromStack(stack).hasResourceProperties('AWS::Lambda::Function', {
+    Handler: 'index.myHandler', // automatic index. prefix
+    Runtime: 'nodejs14.x',
+  });
+});
+
+test('NodejsFunction with overridden handler - with dots', () => {
+  // WHEN
+  new NodejsFunction(stack, 'handler1', {
+    handler: 'run.sh',
+  });
+
+  expect(Bundling.bundle).toHaveBeenCalledWith(expect.objectContaining({
+    entry: expect.stringContaining('function.test.handler1.ts'), // Automatically finds .ts handler file
+  }));
+
+  Template.fromStack(stack).hasResourceProperties('AWS::Lambda::Function', {
+    Handler: 'run.sh', // No index. prefix
+    Runtime: 'nodejs14.x',
+  });
+});
+
 test('NodejsFunction with .js handler', () => {
   // WHEN
   new NodejsFunction(stack, 'handler2');

packages/@aws-cdk/aws-lambda-nodejs/test/integ-handlers/ts-web-handler.ts

@@ -0,0 +1,12 @@
+import { Server } from 'http';
+import { mult } from './util';
+
+// Create simple http server
+const server = new Server((_req, res) => {
+  res.writeHead(200, { 'Content-Type': 'text/plain' });
+  res.end(`${mult(3, 4)}`);
+  console.log(mult(3, 4)); // eslint-disable-line no-console
+});
+
+const port = parseInt(process.env.PORT || '3001', 10);
+server.listen(port);

packages/@aws-cdk/aws-lambda-nodejs/test/integ-handlers/ts-web-run.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# For AWS Lambda Adapter
+# https://github.com/awslabs/aws-lambda-web-adapter
+export READINESS_CHECK_PATH="${READINESS_CHECK_PATH:-/health}"
+export AWS_LAMBDA_EXEC_WRAPPER="${AWS_LAMBDA_EXEC_WRAPPER:-/opt/bootstrap}"
+export RUST_LOG="${RUST_LOG:-info}"
+export AWS_LWA_ENABLE_COMPRESSION="${AWS_LWA_ENABLE_COMPRESSION:-true}"
+export PORT="${PORT:-3001}"
+
+exec node index.js

packages/@aws-cdk/aws-lambda-nodejs/test/integ.function.js.snapshot/asset.a33898f49e24c41ff9be236439c418d30e576c5f57763097162d9ec4245216ce/ts-web-run.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# For AWS Lambda Adapter
+# https://github.com/awslabs/aws-lambda-web-adapter
+export READINESS_CHECK_PATH="${READINESS_CHECK_PATH:-/health}"
+export AWS_LAMBDA_EXEC_WRAPPER="${AWS_LAMBDA_EXEC_WRAPPER:-/opt/bootstrap}"
+export RUST_LOG="${RUST_LOG:-info}"
+export AWS_LWA_ENABLE_COMPRESSION="${AWS_LWA_ENABLE_COMPRESSION:-true}"
+export PORT="${PORT:-3001}"
+
+exec node index.js

packages/@aws-cdk/aws-lambda-nodejs/test/integ.function.js.snapshot/cdk-integ-lambda-nodejs.assets.json

@@ -1,5 +1,5 @@
 {
-  "version": "20.0.0",
+  "version": "30.1.0",
   "files": {
     "5017e4b2e278e32bc634202d075b7ed8961b0d784f75450f7918a6a4f6f7df4a": {
       "source": {
@@ -40,15 +40,28 @@
         }
       }
     },
-    "90cb9162c12b37a3990ecbde27ea037907171ccb64eeb60f046f098a9ae069cd": {
+    "a33898f49e24c41ff9be236439c418d30e576c5f57763097162d9ec4245216ce": {
+      "source": {
+        "path": "asset.a33898f49e24c41ff9be236439c418d30e576c5f57763097162d9ec4245216ce",
+        "packaging": "zip"
+      },
+      "destinations": {
+        "current_account-current_region": {
+          "bucketName": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}",
+          "objectKey": "a33898f49e24c41ff9be236439c418d30e576c5f57763097162d9ec4245216ce.zip",
+          "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-file-publishing-role-${AWS::AccountId}-${AWS::Region}"
+        }
+      }
+    },
+    "76dea8b92881f37d669c02f0271a5aa08e02b115b3fbe57063dbb99c5acb1932": {
       "source": {
         "path": "cdk-integ-lambda-nodejs.template.json",
         "packaging": "file"
       },
       "destinations": {
         "current_account-current_region": {
           "bucketName": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}",
-          "objectKey": "90cb9162c12b37a3990ecbde27ea037907171ccb64eeb60f046f098a9ae069cd.json",
+          "objectKey": "76dea8b92881f37d669c02f0271a5aa08e02b115b3fbe57063dbb99c5acb1932.json",
           "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-file-publishing-role-${AWS::AccountId}-${AWS::Region}"
         }
       }

packages/@aws-cdk/aws-lambda-nodejs/test/integ.function.js.snapshot/cdk-integ-lambda-nodejs.template.json

@@ -626,6 +626,136 @@
     "VpcPrivateSubnet2DefaultRoute060D2087",
     "VpcPrivateSubnet2RouteTableAssociationA89CAD56"
    ]
+  },
+  "tshandlercustomhandlernodotsServiceRole1775E15E": {
+   "Type": "AWS::IAM::Role",
+   "Properties": {
+    "AssumeRolePolicyDocument": {
+     "Statement": [
+      {
+       "Action": "sts:AssumeRole",
+       "Effect": "Allow",
+       "Principal": {
+        "Service": "lambda.amazonaws.com"
+       }
+      }
+     ],
+     "Version": "2012-10-17"
+    },
+    "ManagedPolicyArns": [
+     {
+      "Fn::Join": [
+       "",
+       [
+        "arn:",
+        {
+         "Ref": "AWS::Partition"
+        },
+        ":iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
+       ]
+      ]
+     }
+    ]
+   }
+  },
+  "tshandlercustomhandlernodots381F62EE": {
+   "Type": "AWS::Lambda::Function",
+   "Properties": {
+    "Code": {
+     "S3Bucket": {
+      "Fn::Sub": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}"
+     },
+     "S3Key": "5017e4b2e278e32bc634202d075b7ed8961b0d784f75450f7918a6a4f6f7df4a.zip"
+    },
+    "Role": {
+     "Fn::GetAtt": [
+      "tshandlercustomhandlernodotsServiceRole1775E15E",
+      "Arn"
+     ]
+    },
+    "Environment": {
+     "Variables": {
+      "AWS_NODEJS_CONNECTION_REUSE_ENABLED": "1"
+     }
+    },
+    "Handler": "index.handler",
+    "Runtime": "nodejs14.x"
+   },
+   "DependsOn": [
+    "tshandlercustomhandlernodotsServiceRole1775E15E"
+   ]
+  },
+  "tshandlercustomhandlerdotsServiceRole0575D3CB": {
+   "Type": "AWS::IAM::Role",
+   "Properties": {
+    "AssumeRolePolicyDocument": {
+     "Statement": [
+      {
+       "Action": "sts:AssumeRole",
+       "Effect": "Allow",
+       "Principal": {
+        "Service": "lambda.amazonaws.com"
+       }
+      }
+     ],
+     "Version": "2012-10-17"
+    },
+    "ManagedPolicyArns": [
+     {
+      "Fn::Join": [
+       "",
+       [
+        "arn:",
+        {
+         "Ref": "AWS::Partition"
+        },
+        ":iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
+       ]
+      ]
+     }
+    ]
+   }
+  },
+  "tshandlercustomhandlerdots2695F653": {
+   "Type": "AWS::Lambda::Function",
+   "Properties": {
+    "Code": {
+     "S3Bucket": {
+      "Fn::Sub": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}"
+     },
+     "S3Key": "a33898f49e24c41ff9be236439c418d30e576c5f57763097162d9ec4245216ce.zip"
+    },
+    "Role": {
+     "Fn::GetAtt": [
+      "tshandlercustomhandlerdotsServiceRole0575D3CB",
+      "Arn"
+     ]
+    },
+    "Environment": {
+     "Variables": {
+      "AWS_NODEJS_CONNECTION_REUSE_ENABLED": "1"
+     }
+    },
+    "Handler": "ts-web.run.sh",
+    "Layers": [
+     {
+      "Fn::Join": [
+       "",
+       [
+        "arn:aws:lambda:",
+        {
+         "Ref": "AWS::Region"
+        },
+        ":753240598075:layer:LambdaAdapterLayerX86:13"
+       ]
+      ]
+     }
+    ],
+    "Runtime": "nodejs14.x"
+   },
+   "DependsOn": [
+    "tshandlercustomhandlerdotsServiceRole0575D3CB"
+   ]
   }
  },
  "Parameters": {

packages/@aws-cdk/aws-lambda-nodejs/test/integ.function.js.snapshot/cdk.out

@@ -1 +1 @@
-{"version":"20.0.0"}
+{"version":"30.1.0"}

packages/@aws-cdk/aws-lambda-nodejs/test/integ.function.js.snapshot/integ.json

@@ -1,5 +1,5 @@
 {
-  "version": "20.0.0",
+  "version": "30.1.0",
   "testCases": {
     "integ.function": {
       "stacks": [

packages/@aws-cdk/aws-lambda-nodejs/test/integ.function.js.snapshot/manifest.json

@@ -1,12 +1,6 @@
 {
-  "version": "20.0.0",
+  "version": "30.1.0",
   "artifacts": {
-    "Tree": {
-      "type": "cdk:tree",
-      "properties": {
-        "file": "tree.json"
-      }
-    },
     "cdk-integ-lambda-nodejs.assets": {
       "type": "cdk:asset-manifest",
       "properties": {
@@ -23,7 +17,7 @@
         "validateOnSynth": false,
         "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-deploy-role-${AWS::AccountId}-${AWS::Region}",
         "cloudFormationExecutionRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-cfn-exec-role-${AWS::AccountId}-${AWS::Region}",
-        "stackTemplateAssetObjectUrl": "s3://cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}/90cb9162c12b37a3990ecbde27ea037907171ccb64eeb60f046f098a9ae069cd.json",
+        "stackTemplateAssetObjectUrl": "s3://cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}/76dea8b92881f37d669c02f0271a5aa08e02b115b3fbe57063dbb99c5acb1932.json",
         "requiresBootstrapStackVersion": 6,
         "bootstrapStackVersionSsmParameter": "/cdk-bootstrap/hnb659fds/version",
         "additionalDependencies": [
@@ -219,6 +213,30 @@
             "data": "tshandlervpcA502E26A"
           }
         ],
+        "/cdk-integ-lambda-nodejs/ts-handler-custom-handler-no-dots/ServiceRole/Resource": [
+          {
+            "type": "aws:cdk:logicalId",
+            "data": "tshandlercustomhandlernodotsServiceRole1775E15E"
+          }
+        ],
+        "/cdk-integ-lambda-nodejs/ts-handler-custom-handler-no-dots/Resource": [
+          {
+            "type": "aws:cdk:logicalId",
+            "data": "tshandlercustomhandlernodots381F62EE"
+          }
+        ],
+        "/cdk-integ-lambda-nodejs/ts-handler-custom-handler-dots/ServiceRole/Resource": [
+          {
+            "type": "aws:cdk:logicalId",
+            "data": "tshandlercustomhandlerdotsServiceRole0575D3CB"
+          }
+        ],
+        "/cdk-integ-lambda-nodejs/ts-handler-custom-handler-dots/Resource": [
+          {
+            "type": "aws:cdk:logicalId",
+            "data": "tshandlercustomhandlerdots2695F653"
+          }
+        ],
         "/cdk-integ-lambda-nodejs/BootstrapVersion": [
           {
             "type": "aws:cdk:logicalId",
@@ -233,6 +251,12 @@
         ]
       },
       "displayName": "cdk-integ-lambda-nodejs"
+    },
+    "Tree": {
+      "type": "cdk:tree",
+      "properties": {
+        "file": "tree.json"
+      }
     }
   }
 }