task generateVersion {
    group = "JPF Build Resources"
    description = "Generates the .version file with the current revision hash"
    doLast {
        def revision = "git rev-parse HEAD".execute().text
        new File(".version").withWriter("utf-8") { writer ->
            writer.writeLine revision
        }
    }
}

task generateBuildInfo {
    group = "JPF Build Resources"
    description = "Generates the build.properties file."
    doLast {

        Properties info = new Properties()

        def status  = "git status --short".execute().text.trim()
        def revision = "git rev-parse --short HEAD".execute().text.trim()
        def userName = ["git", "log", "-1", "--format=%an <%ae>"].execute().text.trim()
        def date = "git log -1 --format=%ci".execute().text.trim()

        info.setProperty("revision", revision)
        info.setProperty("date", date)
        info.setProperty("author", userName)
        info.setProperty("os.arch", System.getProperty("os.arch"))
        info.setProperty("os.name", System.getProperty("os.name"))
        info.setProperty("user.country", System.getProperty("user.country"))
        info.setProperty("java.version", System.getProperty("java.version"))

        def writer = new File("build.properties").newWriter("utf-8")
        info.store(writer, "JPF core build info")
        writer.close()
    }
}

task copyResources(type: Copy) {
    group = "JPF Build Resources"
    description = "Copies .version and build.properties files to the build directory."

    dependsOn generateBuildInfo
    dependsOn generateVersion

    from "build.properties"
    into sourceSets.main.java.outputDir.path + "/gov/nasa/jpf"

    from ".version"
    into sourceSets.main.java.outputDir.path + "/gov/nasa/jpf"
}