updating version at a file

build.gradle

confirmReleaseVersion.doLast {

    println "> upgrading docker-compose version=${project.version}"

    def versionPattern = "\\d+\\.\\d+\\.\\d+(?:-beta|-snapshot|-alpha)?"
 
    updateVersion("README.md", "/${versionPattern}/", "/${version}/")
    updateVersion("docker-compose.yml", "(image:.*:)(.*)", "\$1${project.version}")

    def sout = new StringBuilder()
    def proc = ['git', 'commit', '-a', "-m [Gradle Release Plugin] - releasing '${project.version}'."].execute()
    proc.consumeProcessOutput(sout, sout)
    proc.waitForOrKill(3000)
    println "> $sout"

}

void updateVersion(f, pattern, replace){

    f = file("${project.projectDir}}/${f}")
    println "> updating version in: ${f}"
    if(!f.exists()){
        println "file ${f} not found"
        System.exit(-1)
    }
    f.write(f.text.replaceAll(pattern, replace))

}