CloudFormation, apply Condition on DependsOn
<p>The task that I need to do is make CDN depend on a S3 bucket. But we want to make it use the existing bucket rather than creating a new one.</p>

<p>Here is the sample code that I am trying:</p>

<pre><code>"Parameters" : {
  "UseExistingBucket" : {
    "Description" : "Yes/No",
    "Default" : "yes",
    "Type" : "String",
    "AllowedValues" : [ "yes", "no" ]
  }
},
"Conditions" : {
  "CreateS3Resources" : {"Fn::Equals" : [{"Ref" : "UseExistingBucket"}, "no"]}
},
"Resources" : {
  "StaticBucket" : {
    "Type" : "AWS::S3::Bucket",
    "Condition" : "CreateS3Resources",
    "Properties" : {
      "BucketName" : { "Fn::Join": [ "-", [ "app",  { "Ref": "EnvType" }, "static" ] ] }
    },
    "DeletionPolicy": "Retain"
  },
  "MyStaticDistribution": {
    "Type": "AWS::CloudFront::Distribution",
    "Properties": {
      "DistributionConfig": {
        "Origins": [
          {
            "DomainName": {
              "Fn::If" : [
                "CreateS3Resources",
                { "Fn::Join": [ "-", [ "app",  { "Ref": "EnvType" }, "static" ] ] },
                {"Fn::GetAtt": [ "StaticBucket", "DomainName" ] }
              ]
            },
            "Id": "S3Origin",
          }
        ]
      }
    },
    "DependsOn": [{
      "Fn::If" : [
        "CreateS3Resources",
        { "Fn::Join": [ "-", [ "app",  { "Ref": "EnvType" }, "static" ] ] },
        ""
      ]
    }]
  }
}
</code></pre>

<p>Please suggest to me any more details, if they are required (atleast stackoverflow does wants more details, but I have not specified any :-P)</p>