aws-cdk
Version:
CDK Toolkit, the command line tool for CDK apps
108 lines • 17.5 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.isHotswappableS3BucketDeploymentChange = exports.REQUIRED_BY_CFN = void 0;
const common_1 = require("./common");
/**
* This means that the value is required to exist by CloudFormation's Custom Resource API (or our S3 Bucket Deployment Lambda's API)
* but the actual value specified is irrelevant
*/
exports.REQUIRED_BY_CFN = 'required-to-be-present-by-cfn';
async function isHotswappableS3BucketDeploymentChange(logicalId, change, evaluateCfnTemplate) {
// In old-style synthesis, the policy used by the lambda to copy assets Ref's the assets directly,
// meaning that the changes made to the Policy are artifacts that can be safely ignored
const ret = [];
if (change.newValue.Type === 'AWS::IAM::Policy') {
return changeIsForS3DeployCustomResourcePolicy(logicalId, change, evaluateCfnTemplate);
}
if (change.newValue.Type !== 'Custom::CDKBucketDeployment') {
return [];
}
// no classification to be done here; all the properties of this custom resource thing are hotswappable
const customResourceProperties = await evaluateCfnTemplate.evaluateCfnExpression({
...change.newValue.Properties,
ServiceToken: undefined,
});
ret.push({
hotswappable: true,
resourceType: change.newValue.Type,
propsChanged: ['*'],
service: 'custom-s3-deployment',
resourceNames: [`Contents of S3 Bucket '${customResourceProperties.DestinationBucketName}'`],
apply: async (sdk) => {
// note that this gives the ARN of the lambda, not the name. This is fine though, the invoke() sdk call will take either
const functionName = await evaluateCfnTemplate.evaluateCfnExpression(change.newValue.Properties?.ServiceToken);
if (!functionName) {
return;
}
await sdk.lambda().invoke({
FunctionName: functionName,
// Lambda refuses to take a direct JSON object and requires it to be stringify()'d
Payload: JSON.stringify({
RequestType: 'Update',
ResponseURL: exports.REQUIRED_BY_CFN,
PhysicalResourceId: exports.REQUIRED_BY_CFN,
StackId: exports.REQUIRED_BY_CFN,
RequestId: exports.REQUIRED_BY_CFN,
LogicalResourceId: exports.REQUIRED_BY_CFN,
ResourceProperties: stringifyObject(customResourceProperties), // JSON.stringify() doesn't turn the actual objects to strings, but the lambda expects strings
}),
}).promise();
},
});
return ret;
}
exports.isHotswappableS3BucketDeploymentChange = isHotswappableS3BucketDeploymentChange;
async function changeIsForS3DeployCustomResourcePolicy(iamPolicyLogicalId, change, evaluateCfnTemplate) {
const roles = change.newValue.Properties?.Roles;
if (!roles) {
return (0, common_1.reportNonHotswappableResource)(change, 'This IAM Policy does not have have any Roles');
}
for (const role of roles) {
const roleArn = await evaluateCfnTemplate.evaluateCfnExpression(role);
const roleLogicalId = await evaluateCfnTemplate.findLogicalIdForPhysicalName(roleArn);
if (!roleLogicalId) {
return (0, common_1.reportNonHotswappableResource)(change, `could not find logicalId for role with name '${roleArn}'`);
}
const roleRefs = evaluateCfnTemplate.findReferencesTo(roleLogicalId);
for (const roleRef of roleRefs) {
if (roleRef.Type === 'AWS::Lambda::Function') {
const lambdaRefs = evaluateCfnTemplate.findReferencesTo(roleRef.LogicalId);
for (const lambdaRef of lambdaRefs) {
// If S3Deployment -> Lambda -> Role and IAM::Policy -> Role, then this IAM::Policy change is an
// artifact of old-style synthesis
if (lambdaRef.Type !== 'Custom::CDKBucketDeployment') {
return (0, common_1.reportNonHotswappableResource)(change, `found an AWS::IAM::Policy that has Role '${roleLogicalId}' that is referred to by AWS::Lambda::Function '${roleRef.LogicalId}' that is referred to by ${lambdaRef.Type} '${lambdaRef.LogicalId}', which does not have type 'Custom::CDKBucketDeployment'`);
}
}
}
else if (roleRef.Type === 'AWS::IAM::Policy') {
if (roleRef.LogicalId !== iamPolicyLogicalId) {
return (0, common_1.reportNonHotswappableResource)(change, `found an AWS::IAM::Policy that has Role '${roleLogicalId}' that is referred to by AWS::IAM::Policy '${roleRef.LogicalId}' that is not the policy of the s3 bucket deployment`);
}
}
else {
return (0, common_1.reportNonHotswappableResource)(change, `found a resource which refers to the role '${roleLogicalId}' that is not of type AWS::Lambda::Function or AWS::IAM::Policy, so the bucket deployment cannot be hotswapped`);
}
}
}
// this doesn't block the hotswap, but it also isn't a hotswappable change by itself. Return
// an empty change to signify this.
return [];
}
function stringifyObject(obj) {
if (obj == null) {
return obj;
}
if (Array.isArray(obj)) {
return obj.map(stringifyObject);
}
if (typeof obj !== 'object') {
return obj.toString();
}
const ret = {};
for (const [k, v] of Object.entries(obj)) {
ret[k] = stringifyObject(v);
}
return ret;
}
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all the properties of this custom resource thing are hotswappable\n  const customResourceProperties = await evaluateCfnTemplate.evaluateCfnExpression({\n    ...change.newValue.Properties,\n    ServiceToken: undefined,\n  });\n\n  ret.push({\n    hotswappable: true,\n    resourceType: change.newValue.Type,\n    propsChanged: ['*'],\n    service: 'custom-s3-deployment',\n    resourceNames: [`Contents of S3 Bucket '${customResourceProperties.DestinationBucketName}'`],\n    apply: async (sdk: ISDK) => {\n      // note that this gives the ARN of the lambda, not the name. This is fine though, the invoke() sdk call will take either\n      const functionName = await evaluateCfnTemplate.evaluateCfnExpression(change.newValue.Properties?.ServiceToken);\n      if (!functionName) {\n        return;\n      }\n\n      await sdk.lambda().invoke({\n        FunctionName: functionName,\n        // Lambda refuses to take a direct JSON object and requires it to be stringify()'d\n        Payload: JSON.stringify({\n          RequestType: 'Update',\n          ResponseURL: REQUIRED_BY_CFN,\n          PhysicalResourceId: REQUIRED_BY_CFN,\n          StackId: REQUIRED_BY_CFN,\n          RequestId: REQUIRED_BY_CFN,\n          LogicalResourceId: REQUIRED_BY_CFN,\n          ResourceProperties: stringifyObject(customResourceProperties), // JSON.stringify() doesn't turn the actual objects to strings, but the lambda expects strings\n        }),\n      }).promise();\n    },\n  });\n\n  return ret;\n}\n\nasync function changeIsForS3DeployCustomResourcePolicy(\n  iamPolicyLogicalId: string, change: HotswappableChangeCandidate, evaluateCfnTemplate: EvaluateCloudFormationTemplate,\n): Promise<ChangeHotswapResult> {\n  const roles = change.newValue.Properties?.Roles;\n  if (!roles) {\n    return reportNonHotswappableResource(\n      change,\n      'This IAM Policy does not have have any Roles',\n    );\n  }\n\n  for (const role of roles) {\n    const roleArn = await evaluateCfnTemplate.evaluateCfnExpression(role);\n    const roleLogicalId = await evaluateCfnTemplate.findLogicalIdForPhysicalName(roleArn);\n    if (!roleLogicalId) {\n      return reportNonHotswappableResource(\n        change,\n        `could not find logicalId for role with name '${roleArn}'`,\n      );\n    }\n\n    const roleRefs = evaluateCfnTemplate.findReferencesTo(roleLogicalId);\n    for (const roleRef of roleRefs) {\n      if (roleRef.Type === 'AWS::Lambda::Function') {\n        const lambdaRefs = evaluateCfnTemplate.findReferencesTo(roleRef.LogicalId);\n        for (const lambdaRef of lambdaRefs) {\n          // If S3Deployment -> Lambda -> Role and IAM::Policy -> Role, then this IAM::Policy change is an\n          // artifact of old-style synthesis\n          if (lambdaRef.Type !== 'Custom::CDKBucketDeployment') {\n            return reportNonHotswappableResource(\n              change,\n              `found an AWS::IAM::Policy that has Role '${roleLogicalId}' that is referred to by AWS::Lambda::Function '${roleRef.LogicalId}' that is referred to by ${lambdaRef.Type} '${lambdaRef.LogicalId}', which does not have type 'Custom::CDKBucketDeployment'`,\n            );\n          }\n        }\n      } else if (roleRef.Type === 'AWS::IAM::Policy') {\n        if (roleRef.LogicalId !== iamPolicyLogicalId) {\n          return reportNonHotswappableResource(\n            change,\n            `found an AWS::IAM::Policy that has Role '${roleLogicalId}' that is referred to by AWS::IAM::Policy '${roleRef.LogicalId}' that is not the policy of the s3 bucket deployment`,\n          );\n        }\n      } else {\n        return reportNonHotswappableResource(\n          change,\n          `found a resource which refers to the role '${roleLogicalId}' that is not of type AWS::Lambda::Function or AWS::IAM::Policy, so the bucket deployment cannot be hotswapped`,\n        );\n      }\n    }\n  }\n\n  // this doesn't block the hotswap, but it also isn't a hotswappable change by itself. Return\n  // an empty change to signify this.\n  return [];\n}\n\nfunction stringifyObject(obj: any): any {\n  if (obj == null) {\n    return obj;\n  }\n  if (Array.isArray(obj)) {\n    return obj.map(stringifyObject);\n  }\n  if (typeof obj !== 'object') {\n    return obj.toString();\n  }\n\n  const ret: { [k: string]: any } = {};\n  for (const [k, v] of Object.entries(obj)) {\n    ret[k] = stringifyObject(v);\n  }\n  return ret;\n}\n"]}