/// <summary>
/// Initializes a new instance of the <see cref="DependencyResolutionWarning"/> class.
/// </summary>
/// <param name="intrinsic">The intrinsic being warned about.</param>
/// <param name="containingResource">The resource that contains the errant intrinsic.</param>
/// <param name="location">The the AWS property path to the intrinsic being warned about.</param>
protected DependencyResolutionWarning(
IIntrinsic intrinsic,
IResource containingResource,
PropertyPath location)
: base(string.Empty)
{
this.Location = location.Clone();
this.Intrinsic = intrinsic;
this.ContainingResource = containingResource;
}
/// <summary>
/// Initializes a new instance of the <see cref="IntrinsicInfo"/> class.
/// </summary>
/// <param name="propertyPath">The property path.</param>
/// <param name="intrinsic">The intrinsic.</param>
/// <param name="resourceMapping">Summary info of the resource targeted by this intrinsic.</param>
/// <param name="evaluation">The evaluation.</param>
public IntrinsicInfo(
PropertyPath propertyPath,
IIntrinsic intrinsic,
ResourceMapping resourceMapping,
object evaluation)
{
this.targetResource = resourceMapping;
this.intrinsic = intrinsic;
this.PropertyPath = propertyPath.Clone();
this.InitialEvaluation = evaluation;
this.intrinsic.ExtraData = this;
}
/// <summary>
/// Creates an <see cref="IntrinsicInfo"/> for a Ref intrinsic.
/// </summary>
/// <param name="refIntrinsic">The reference intrinsic.</param>
/// <param name="currentPath">The current path.</param>
/// <returns>An <see cref="IntrinsicInfo"/></returns>
private IntrinsicInfo ProcessRef(RefIntrinsic refIntrinsic, PropertyPath currentPath)
{
object evaluation;
var target = refIntrinsic.Reference;
var param = this.Inputs.FirstOrDefault(i => i.Name == target);
if (param != null)
{
evaluation = param.IsScalar ? (object)param.ScalarIdentity : param.ListIdentity;
return(new IntrinsicInfo(currentPath.Clone(), refIntrinsic, null, evaluation));
}
if (target.StartsWith("AWS::"))
{
// An unsupported AWS pseudo parameter like AWS::StackName etc.
throw new UnsupportedPseudoParameterWarning(
refIntrinsic,
this.currentCloudFormationResource,
currentPath);
}
var cloudFormationResource = this.CloudFormationResources
.Where(r => TerraformExporterConstants.IgnoredResources.All(ir => ir != r.ResourceType))
.FirstOrDefault(r => r.LogicalResourceId == target);
if (cloudFormationResource == null)
{
// If not found, then reference is to a resource that couldn't be imported eg. a custom resource
// or a known unsupported type.
throw new UnsupportedResourceWarning(refIntrinsic, this.currentCloudFormationResource, currentPath);
}
var targetResourceSummary = new ResourceMapping
{
AwsType = cloudFormationResource.ResourceType,
LogicalId = cloudFormationResource.LogicalResourceId,
PhysicalId = cloudFormationResource.PhysicalResourceId,
TerraformType = this.TerraformResources.First(
tr => tr.Name == cloudFormationResource.LogicalResourceId).Type
};
evaluation = cloudFormationResource.PhysicalResourceId;
return(new IntrinsicInfo(currentPath, refIntrinsic, targetResourceSummary, evaluation));
}
/// <summary>
/// Begin processing an intrinsic.
/// </summary>
/// <param name="intrinsic">The intrinsic.</param>
/// <param name="currentPath">The current path.</param>
public void EnterIntrinsic(IIntrinsic intrinsic, PropertyPath currentPath)
{
if (this.lastWarning != null)
{
// Something that can't be resolved has been found,
// so don't process any more here.
return;
}
var clonedPath = currentPath.Clone();
try
{
if (this.parentIntrinsicPath == null)
{
// This is a "top level" intrinsic associated directly with a resource attribute.
if (this.currentCloudFormationResource.Type == "AWS::Lambda::Permission" &&
currentPath.Path == "FunctionName" && intrinsic is RefIntrinsic)
{
// !! NASTY KLUDGE ALERT !!
// AWS treats this property as a !Ref which is lambda function's name, but terraform actually wants the ARN here.
// If I find more cases like this, then I'll put something into resource traits
intrinsic = new GetAttIntrinsic(
intrinsic.GetReferencedObjects(this.template).First(),
"Arn");
}
this.intrinsicInfos.Push(this.currentIntrinsicInfo);
this.parentIntrinsicPath = clonedPath;
this.currentIntrinsicInfo = this.GetIntrinsicInfo(intrinsic, currentPath);
}
else
{
// We have descended the graph to member intrinsic
this.intrinsicInfos.Push(this.currentIntrinsicInfo);
var intrinsicInfo = this.GetIntrinsicInfo(intrinsic, currentPath);
this.currentIntrinsicInfo.NestedIntrinsics.Add(intrinsicInfo);
this.currentIntrinsicInfo = intrinsicInfo;
}
}
catch (DependencyResolutionWarning w)
{
this.lastWarning = w;
}
}