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#136 - Fixed issue with eventSourceArn if not a resource reference #180

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#136 - Fixed issue with eventSourceArn if not a resource reference #180

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50 changes: 26 additions & 24 deletions lib/stackops/events.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,31 +32,33 @@ module.exports = function(currentTemplate, aliasStackTemplates, currentAliasStac

// Make sure that the referenced resource is exported by the stageStack.
const resourceRef = utils.findAllReferences(_.get(subscription, 'Properties.EventSourceArn'));
// Build the export name
let resourceRefName = _.get(resourceRef, '[0].ref');
if (_.has(subscription.Properties, 'EventSourceArn.Fn::GetAtt')) {
const attribute = subscription.Properties.EventSourceArn['Fn::GetAtt'][1];
resourceRefName += attribute;
}
// Add the ref output to the stack if not already done.
stageStack.Outputs[resourceRefName] = {
Description: 'Alias resource reference',
Value: subscription.Properties.EventSourceArn,
Export: {
Name: `${stackName}-${resourceRefName}`
}
};
// Add the output to the referenced alias outputs
const aliasOutputs = JSON.parse(aliasStack.Outputs.AliasOutputs.Value);
aliasOutputs.push(resourceRefName);
aliasStack.Outputs.AliasOutputs.Value = JSON.stringify(aliasOutputs);
// Replace the reference with the cross stack reference
subscription.Properties.EventSourceArn = {};
if (resourceRef.length > 0) {
// Build the export name
let resourceRefName = _.get(resourceRef, '[0].ref');
if (_.has(subscription.Properties, 'EventSourceArn.Fn::GetAtt')) {
const attribute = subscription.Properties.EventSourceArn['Fn::GetAtt'][1];
resourceRefName += attribute;
}
// Add the ref output to the stack if not already done.
stageStack.Outputs[resourceRefName] = {
Description: 'Alias resource reference',
Value: subscription.Properties.EventSourceArn,
Export: {
Name: `${stackName}-${resourceRefName}`
}
};
// Add the output to the referenced alias outputs
const aliasOutputs = JSON.parse(aliasStack.Outputs.AliasOutputs.Value);
aliasOutputs.push(resourceRefName);
aliasStack.Outputs.AliasOutputs.Value = JSON.stringify(aliasOutputs);
// Replace the reference with the cross stack reference
subscription.Properties.EventSourceArn = {};

// Event source ARNs can be volatile - e.g. DynamoDB and must not be referenced
// with Fn::ImportValue which does not allow for changes. So we have to register
// them for delayed lookup until the base stack has been updated.
this.addDeferredOutput(`${stackName}-${resourceRefName}`, subscription.Properties, 'EventSourceArn');
// Event source ARNs can be volatile - e.g. DynamoDB and must not be referenced
// with Fn::ImportValue which does not allow for changes. So we have to register
// them for delayed lookup until the base stack has been updated.
this.addDeferredOutput(`${stackName}-${resourceRefName}`, subscription.Properties, 'EventSourceArn');
}

// Remove mapping from stage stack
delete stageStack.Resources[name];
Expand Down