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Read-only Gradle Wrapper Files Are Bad, mmkaay

I’ve just been messing around with a Gradle build using Gradle Wrapper, trying to import an ant build which does some clever stuff. I couldn’t get it to work, so I eventually changed the Ant script to just echo a variable, and then just tried importing the ant file into gradle and calling the echo task, like this:

ant file (test.xml):

<target name=”test” >
<echo>the value of main.version is ${main.version}</echo>


Gradle file:

ant.importBuild ‘test.xml’

And I was just running this:

gradlew test


Simples, right? Well, as it happens, no. I’m running the 1.0 “release” of gradle wrapper (which is actually versioned as 1.0-rc-3, strangely enough). Whenever I tried to run my highly complicated build (ahem), I got this lovely error:

Could not open task artifact state cache (D:\development\ReleaseEngineering\main\commonBuildStuff\.gradle\1.0-rc-3\taskArtifacts).
> java.io.FileNotFoundException: D:\development\ReleaseEngineering\main\commonBuildStuff\.gradle\1.0-rc-3\taskArtifacts\cache.properties.lock (Access is denied)

Access is denied! Gah! Of course it is! Wait, why is access denied? Well, basically that file is read-only because it’s in source control and I’m using Perforce. I removed the read-only flag and the build worked. Problem temporarily solved. It’s going to be interesting to see how this is going to work in the C.I. system…

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