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Read-only Gradle Wrapper Files Are Bad, mmkaay

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Read-only Gradle Wrapper Files Are Bad, mmkaay

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What every Java engineer should know about microservices: Reactive Microservices Architecture.  Brought to you in partnership with Lightbend.

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>
</target>

 

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…

Microservices for Java, explained. Revitalize your legacy systems (and your career) with Reactive Microservices Architecture, a free O'Reilly book. Brought to you in partnership with Lightbend.

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Published at DZone with permission of James Betteley, DZone MVB. See the original article here.

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