android - Rename file in gradle with passed parameter -

i'm packaging build artefacts gradle build. it's android studio project.

i have tasks create zip file containing 2 jars. let's zip file called 'my.zip'.

i have following gradle task:

task renameartifacts (type: copy) {     ('build/')     include 'my.zip'     destinationdir file('build/')     dolast {         println "my-${versionstring}.zip"         rename('build/my.zip', "build/my-${versionstring}.zip")     } } 

and i'm calling gradle -pversionstring="123" :sdk:renameartifacts

i have println in dolast closure , can see string interpolation working correctly outputs my-123.zip.

however, 'my.zip' not renamed 'my-123.zip'. remains 'my.zip' , in fact results in file size of 0 bytes , no longer openable zip file.

i'm going wrong somewhere, where?

full gradle file:

apply plugin: 'com.android.library'  android {     compilesdkversion 22     buildtoolsversion "23.0.3"      defaultconfig {         minsdkversion 14         targetsdkversion 14         versioncode 1         versionname "1.0"     }     buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     compile filetree(include: ['*.jar'], dir: 'libs')     testcompile 'junit:junit:4.12'     compile 'com.android.support:support-v4:22.2.0'     compile files('libs/urbanairship-lib-3.1.0.jar')     compile files('libs/jackson-annotations-2.2.2.jar')     compile files('libs/jackson-core-2.2.2.jar')     compile files('libs/jackson-databind-2.2.2.jar') }  task updateversionnumber() << {     ant.replace(file: 'src/main/java/com/my/version.java', token: '{{version}}', value: versionstring) }  task javadoc(type: javadoc) {     source = android.sourcesets.main.java.srcdirs     classpath += project.files(android.getbootclasspath().join(file.pathseparator))     destinationdir = file("build/javadoc")     failonerror false }  task createjavadocjar(type: jar) {     ('build/javadoc')     destinationdir file('build')     basename = 'my_doc' } createjavadocjar.dependson(javadoc)  task packagemyjaranddependencies(type: jar) {     (ziptree('libs/jackson-annotations-2.2.2.jar')) {         exclude 'meta-inf/maven/'         exclude 'meta-inf/services/'     }     (ziptree('libs/jackson-core-2.2.2.jar')) {         exclude 'meta-inf/maven/'         exclude 'meta-inf/services/'     }     (ziptree('libs/jackson-databind-2.2.2.jar')) {         exclude 'meta-inf/maven/'         exclude 'meta-inf/services/'     }     (ziptree('libs/urbanairship-lib-3.1.0.jar'))     (ziptree('build/intermediates/bundles/release/classes.jar')) }  task createfinaljar(type: copy) {     from('build/libs/')     into('build')     include('sdk.jar')     rename('sdk.jar', 'my.jar') } createfinaljar.dependson(clean, build, packagemyjaranddependencies) packagemyjaranddependencies.mustrunafter build build.mustrunafter clean  task zipartifacts(type: zip) {     ('build/')     ('build/libs')     include 'my_doc.jar'     include 'my.jar'     basename = 'my_lib'     destinationdir file('build') } zipartifacts.dependson(createfinaljar, createjavadocjar)  task renameartifacts (type: copy) {     ('build/')     into('build')     include 'my_lib.zip'     dolast {         println "my_lib-${versionstring}.zip"         rename "my_lib.zip", "my_lib-${versionstring}.zip"     } } renameartifacts.dependson(zipartifacts) 

rename method on copyprocessingspec, configures task perform renamings while operating. if wrap in dolast, copying has happened, , no rename performed. furthermore, rename takes file names, not relative or absolute file paths. should work:

project.ext.versionstring = versionstring task renameartifacts (type: copy) {     ('build/')     include 'my.zip'     destinationdir file('build/')     rename 'my.zip', "my-${project.versionstring}.zip" } 

edit: $versionstring not accessible in tasks. using project property suggested way how pass these in tasks (see here).