GrEclipseFormatterStep fails when ~/.m2/ is not writable

[DanielThomas]

In our CI environment, the build user cannot write to their own home directory, but we configure ~/.m2/settings.xml to change the local repository a separate mount for builds:

  <localRepository>/agent/.m2/repository</localRepository>

However the configuration of P2Model here doesn't reflect that setting, and tries to write to the read-only location:

Caused by: java.nio.file.AccessDeniedException: /home/<user>/.m2/repository	
	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)	
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)	
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)	
	at sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:397)	
	at java.nio.file.Files.createDirectory(Files.java:700)	
	at java.nio.file.Files.createAndCheckIsDirectory(Files.java:807)	
	at java.nio.file.Files.createDirectories(Files.java:793)	
	at dev.equo.solstice.p2.FileMisc.lambda$mkdirs$2(FileMisc.java:84)	
	at dev.equo.solstice.p2.FileMisc.retry(FileMisc.java:101)	
	at dev.equo.solstice.p2.FileMisc.retry(FileMisc.java:93)	
	at dev.equo.solstice.p2.FileMisc.mkdirs(FileMisc.java:84)	
	at dev.equo.solstice.p2.QueryCacheOnDisk.<init>(QueryCacheOnDisk.java:33)	
	at dev.equo.solstice.p2.P2Model.query(P2Model.java:118)	
	at com.diffplug.spotless.extra.EquoBasedStepBuilder.get(EquoBasedStepBuilder.java:107)	
	at com.diffplug.spotless.FormatterStepImpl.calculateState(FormatterStepImpl.java:58)	
	at com.diffplug.spotless.LazyForwardingEquality.state(LazyForwardingEquality.java:56)	
	at com.diffplug.spotless.LazyForwardingEquality.unlazy(LazyForwardingEquality.java:118)	
	at com.diffplug.spotless.LazyForwardingEquality.unlazy(LazyForwardingEquality.java:124)	
	at com.diffplug.gradle.spotless.JvmLocalCache$LiveCacheKeyImpl.set(JvmLocalCache.java:60)	
	at com.diffplug.gradle.spotless.SpotlessTask.setSteps(SpotlessTask.java:168)	
	at com.diffplug.gradle.spotless.SpotlessTaskImpl_Decorated.setSteps(Unknown Source)	
	at com.diffplug.gradle.spotless.FormatExtension.setupTask(FormatExtension.java:927)	
	at com.diffplug.gradle.spotless.GroovyGradleExtension.setupTask(GroovyGradleExtension.java:56)	
	at com.diffplug.gradle.spotless.SpotlessExtensionImpl.lambda$createFormatTasks$6(SpotlessExtensionImpl.java:70)

Appears that was introduced here:

2673e91

Seen when upgrading from Spotless 6.9.1 to 6.20.0 w/ Gradle.

[nedtwigg]

• Dupe of Move equo caches into build / build tool directory #1687