[gradle-user] task should only execute if dependent war has changed

[Magnus Rundberget]

Hi, 

I have a requirement to compile jsp files for war files. 
The compilation of jsp's is rather time consuming so I wish for it only to 
execute when the war file it uses as input (or any of the tasks custom 
dependencies) has actually changed.

Any tips on what I need to add to input.files (or alternative solutions) to the 
below to make this work ?

// ------ setup compile jsp task for wars -----
    task compileJsp(dependsOn: 'assemble') {
        onlyIf {
            project.hasProperty('compile_jsp')
            //dependsOnTaskDidWork()
        }
        
        inputs.files  configurations.jspCompileLibs
        doLast {            
            appcClassPath = "c:/bea_103/wlserver_10.3/server/lib/weblogic.jar"
            if (configurations.jspCompileLibs.asPath) {
                appcClassPath =  appcClassPath + ";" + 
configurations.jspCompileLibs.asPath    
            }
            ant.java(classname: 'weblogic.appc', fork: true, 
classpath:appcClassPath, failOnError: true) {
                arg(line: war.archivePath)
                arg(line: "-compiler jdt")
            }
        }
        
    }
    build.dependsOn compileJsp
    // ------ end setup compile jsp ---------

PS the jsp compiler takes a war as input, compiles the jsps and packages a new 
war file with the same name as the input war

kind regards
Magnus