Automatic Property Expansion Using Gradle with escape characters

I'm using property expansion in Gradle. All works fine but for file-paths.

I am using the processResources task in Gradle

    processResources {
        filesMatching ('**/application.properties') {
            expand project.properties
        }
    }

I have a property in my Spring application.properties as follows:

root.location = ${rootDir}

In my build.gradle I have defined the following:

ext['rootDir'] = rootProject.buildDir.path + File.separator + "tmp"

Result I get in application.properties is

root.location = D:\Projects\myproject\build\tmp

Which turns into D:Projectsmyprojectbuild\tmp in my Spring class when doing:

@Value("${cpm.repository.root.location}") String rootLocation;

I need the property to be expanded to:

root.location = D:\\projects\\myproject\\build\\tmp

Because that would result in D:\projects\myproject\build\tmp

What am I doing wrong? Expansion does work as intended, it's just that the '' in the path are not escapped when expanded.

Thanks in advance

I think you should use processResources task to modify your resources.

We are using it that way (with application.yml and Gradle Kotlin DSL):

tasks {
    named<ProcessResources>("processResources") {
        outputs.upToDateWhen { false }

        filesMatching("**/application.yml") {
            filter {
                it.replace("#project.version#", version as String)
            }
            filter {
                it.replace("#spring.profiles.active#", profiles)
            }
        }
    }
}

And of course #spring.profiles.active# is a string you want to replace in your file.