fix(core): cross stack references to string lists break

packages/@aws-cdk/aws-cloudformation/package.json

@@ -93,6 +93,7 @@
     "jest": "^27.5.1"
   },
   "dependencies": {
+    "@aws-cdk/aws-ec2": "0.0.0",
     "@aws-cdk/aws-iam": "0.0.0",
     "@aws-cdk/aws-lambda": "0.0.0",
     "@aws-cdk/aws-s3": "0.0.0",
@@ -103,6 +104,7 @@
   },
   "homepage": "https://github.com/aws/aws-cdk",
   "peerDependencies": {
+    "@aws-cdk/aws-ec2": "0.0.0",
     "@aws-cdk/aws-iam": "0.0.0",
     "@aws-cdk/aws-lambda": "0.0.0",
     "@aws-cdk/aws-s3": "0.0.0",

packages/@aws-cdk/aws-cloudformation/test/integ.core-cross-stack-string-list-references.js.snapshot/cdk.out

@@ -0,0 +1 @@
+{"version":"21.0.0"}

packages/@aws-cdk/aws-cloudformation/test/integ.core-cross-stack-string-list-references.js.snapshot/consumer.assets.json

@@ -0,0 +1,19 @@
+{
+  "version": "21.0.0",
+  "files": {
+    "202e8f081dd11cb0e9069382b05ff8627424bffd02c1aca22b6b4b4ee96df4a3": {
+      "source": {
+        "path": "consumer.template.json",
+        "packaging": "file"
+      },
+      "destinations": {
+        "current_account-current_region": {
+          "bucketName": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}",
+          "objectKey": "202e8f081dd11cb0e9069382b05ff8627424bffd02c1aca22b6b4b4ee96df4a3.json",
+          "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-file-publishing-role-${AWS::AccountId}-${AWS::Region}"
+        }
+      }
+    }
+  },
+  "dockerImages": {}
+}

packages/@aws-cdk/aws-cloudformation/test/integ.core-cross-stack-string-list-references.js.snapshot/consumer.template.json

@@ -0,0 +1,76 @@
+{
+ "Resources": {
+  "GetAtt0B6ACA40": {
+   "Type": "AWS::SSM::Parameter",
+   "Properties": {
+    "Type": "StringList",
+    "Value": {
+     "Fn::Join": [
+      ",",
+      {
+       "Fn::Split": [
+        "CDK-string-list-export-delimiter",
+        {
+         "Fn::ImportValue": "producer:ExportsOutputFnGetAttendpointE7B9679BDnsEntries62080A34"
+        }
+       ]
+      }
+     ]
+    }
+   }
+  },
+  "Ref47C32AF2": {
+   "Type": "AWS::SSM::Parameter",
+   "Properties": {
+    "Type": "StringList",
+    "Value": {
+     "Fn::Join": [
+      ",",
+      {
+       "Fn::Split": [
+        "CDK-string-list-export-delimiter",
+        {
+         "Fn::ImportValue": "producer:ExportsOutputRefstringListParam77B646D6"
+        }
+       ]
+      }
+     ]
+    }
+   }
+  }
+ },
+ "Parameters": {
+  "BootstrapVersion": {
+   "Type": "AWS::SSM::Parameter::Value<String>",
+   "Default": "/cdk-bootstrap/hnb659fds/version",
+   "Description": "Version of the CDK Bootstrap resources in this environment, automatically retrieved from SSM Parameter Store. [cdk:skip]"
+  }
+ },
+ "Rules": {
+  "CheckBootstrapVersion": {
+   "Assertions": [
+    {
+     "Assert": {
+      "Fn::Not": [
+       {
+        "Fn::Contains": [
+         [
+          "1",
+          "2",
+          "3",
+          "4",
+          "5"
+         ],
+         {
+          "Ref": "BootstrapVersion"
+         }
+        ]
+       }
+      ]
+     },
+     "AssertDescription": "CDK bootstrap stack version 6 required. Please run 'cdk bootstrap' with a recent version of the CDK CLI."
+    }
+   ]
+  }
+ }
+}

packages/@aws-cdk/aws-cloudformation/test/integ.core-cross-stack-string-list-references.js.snapshot/crossregionreferencesDefaultTestDeployAssertAB7415FD.assets.json

@@ -0,0 +1,19 @@
+{
+  "version": "21.0.0",
+  "files": {
+    "21fbb51d7b23f6a6c262b46a9caee79d744a3ac019fd45422d988b96d44b2a22": {
+      "source": {
+        "path": "crossregionreferencesDefaultTestDeployAssertAB7415FD.template.json",
+        "packaging": "file"
+      },
+      "destinations": {
+        "current_account-current_region": {
+          "bucketName": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}",
+          "objectKey": "21fbb51d7b23f6a6c262b46a9caee79d744a3ac019fd45422d988b96d44b2a22.json",
+          "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-file-publishing-role-${AWS::AccountId}-${AWS::Region}"
+        }
+      }
+    }
+  },
+  "dockerImages": {}
+}

packages/@aws-cdk/aws-cloudformation/test/integ.core-cross-stack-string-list-references.js.snapshot/crossregionreferencesDefaultTestDeployAssertAB7415FD.template.json

@@ -0,0 +1,36 @@
+{
+ "Parameters": {
+  "BootstrapVersion": {
+   "Type": "AWS::SSM::Parameter::Value<String>",
+   "Default": "/cdk-bootstrap/hnb659fds/version",
+   "Description": "Version of the CDK Bootstrap resources in this environment, automatically retrieved from SSM Parameter Store. [cdk:skip]"
+  }
+ },
+ "Rules": {
+  "CheckBootstrapVersion": {
+   "Assertions": [
+    {
+     "Assert": {
+      "Fn::Not": [
+       {
+        "Fn::Contains": [
+         [
+          "1",
+          "2",
+          "3",
+          "4",
+          "5"
+         ],
+         {
+          "Ref": "BootstrapVersion"
+         }
+        ]
+       }
+      ]
+     },
+     "AssertDescription": "CDK bootstrap stack version 6 required. Please run 'cdk bootstrap' with a recent version of the CDK CLI."
+    }
+   ]
+  }
+ }
+}

packages/@aws-cdk/aws-cloudformation/test/integ.core-cross-stack-string-list-references.js.snapshot/integ.json

@@ -0,0 +1,14 @@
+{
+  "version": "21.0.0",
+  "testCases": {
+    "cross-region-references/DefaultTest": {
+      "stacks": [
+        "producer",
+        "consumer"
+      ],
+      "stackUpdateWorkflow": false,
+      "assertionStack": "cross-region-references/DefaultTest/DeployAssert",
+      "assertionStackName": "crossregionreferencesDefaultTestDeployAssertAB7415FD"
+    }
+  }
+}