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Replace configuration files with environment variables on VSTS tasks

I believe you definitely want to replace values of some files in your projects with environments variables when you setup Visual Studio Team Services Build/Release processes. There are some ways to replace the values, and I will introduce to use e "Replace Tokens" published in Marketplace.

How to use "Replace Tokens" on VSTS

Input "Replace Tokens" into search box when you add new tasks in your VSTS Build/Release process and click "Install" to initialize it.
f:id:waritohutsu:20180406070531p:plain

After adding "Replace Tokens" task in your process, change "Root directory" and "Target files" to specify which files you want to change. In below example, I specify *.xml files in my "SFwithASPNetApp" project.
f:id:waritohutsu:20180406070730p:plain

And finally refer below a part of Service Fabric ServiceManifest.xml. This xml file uses "Build.Repository.Name" and "Build.BuildId" environment variables to specify Docker image name.

  <CodePackage Name="Code" Version="1.0.0">
    <EntryPoint>
      <!-- Follow this link for more information about deploying Windows containers to Service Fabric: https://aka.ms/sfguestcontainers -->
      <ContainerHost>
        <ImageName>mynormalianregister.azurecr.io/#{Build.Repository.Name}#:#{Build.BuildId}#</ImageName>
      </ContainerHost>
    </EntryPoint>

The Docker image name will replace from "mynormalianregister.azurecr.io/#{Build.Repository.Name}#:#{Build.BuildId}#" into "mynormalianregister.azurecr.io/us-customer-demo-projects:111" in this case.

Note that you must put "}#" not "}" as suffix token.