我正在尝试从源代码安装 Grails。我是3天前开始的，仍然有一些问题。每次尝试都以消息结束：
:grails-bootstrap:compileGroovy
[ant:groovyc] >>> a serious error occurred: grails/util/BuildSettings
[ant:groovyc] >>> stacktrace:
[ant:groovyc] java.lang.NoClassDefFoundError: grails/util/BuildSettings
[ant:groovyc] at java.lang.Class.getDeclaredMethods0(Native Method)
[ant:groovyc] at java.lang.Class.privateGetDeclaredMethods(Class.java:2440)
[ant:groovyc] at java.lang.Class.getDeclaredMethods(Class.java:1806)
Execution failed for task ':grails-bootstrap:compileGroovy'.
> Forked groovyc returned error code: 1
我正在使用 Ubuntu 12.04 LTS 64 位
我做了什么：
安装java
Java 版本“1.7.0-ea”
Java(TM) SE 运行时环境（构建 1.7.0-ea-b76）
Java HotSpot(TM) 64 位服务器 VM（构建 17.0-b05，混合模式）安装 groovy
Groovy 版本：2.0.0 JVM：1.7.0-ea 供应商：Sun Microsystems Inc. 操作系统：Linux
克隆 grails 并将其签出到 v2.1.0
调用 sudo ./gradlew install
如果我使用 --stacktrace --info --debug
00:15:19.777 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception.
00:15:19.779 [ERROR] [org.gradle.BuildExceptionReporter]
00:15:19.780 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong:
00:15:19.781 [ERROR] [org.gradle.BuildExceptionReporter] Execution failed for task ':grails-bootstrap:compileGroovy'.
00:15:19.786 [ERROR] [org.gradle.BuildExceptionReporter] > Forked groovyc returned error code: 1
00:15:19.787 [ERROR] [org.gradle.BuildExceptionReporter]
00:15:19.788 [ERROR] [org.gradle.BuildExceptionReporter] * Exception is:
00:15:19.791 [ERROR] [org.gradle.BuildExceptionReporter] org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':grails-bootstrap:compileGroovy'.
00:15:19.792 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:68)
00:15:19.794 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
00:15:19.795 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:34)
00:15:19.796 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.changedetection.CacheLockHandlingTaskExecuter$1.run(CacheLockHandlingTaskExecuter.java:34)
00:15:19.797 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.cache.internal.DefaultCacheAccess$2.create(DefaultCacheAccess.java:200)
00:15:19.799 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:172)
00:15:19.800 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:198)
我能做些什么更好？