获得Ant构建错误：不能运行程序“蟒蛇”

Question

这是构建文件：

<exec executable="python" failonerror="true"> 
    <arg line="${installer.izpack.dir}/utils/wrappers/izpack2exe/izpack2exe.py"/> 
    <arg line="--file=${basedir}/installer/EasyIT-installer.jar"/> 
    <arg line="--output=${basedir}/installer/EasyIT-installer.exe"/> 
    <arg line="--no-upx"/> 
</exec> 

和输出：

BUILD FAILED 
E:\Java Projects\Spark Projects\EastIT - Copy\build\build.xml:873: Execute failed: java.io.IOException: Cannot run program "python" (in directory "E:\Java Projects\Spark Projects\EastIT - Copy"): CreateProcess error=2, The system cannot find the file specified 
     at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) 
     at java.lang.Runtime.exec(Runtime.java:615) 
     at org.apache.tools.ant.taskdefs.Execute$Java13CommandLauncher.exec(Execute.java:8 62) 
     at org.apache.tools.ant.taskdefs.Execute.launch(Execute.java:481) 
     at org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:495) 
     at org.apache.tools.ant.taskdefs.ExecTask.runExecute(ExecTask.java:631) 
     at org.apache.tools.ant.taskdefs.ExecTask.runExec(ExecTask.java:672) 
     at org.apache.tools.ant.taskdefs.ExecTask.execute(ExecTask.java:498) 
     at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) 
     at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja va:43) 
     at java.lang.reflect.Method.invoke(Method.java:601) 
     at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
     at org.apache.tools.ant.Task.perform(Task.java:348) 
     at org.apache.tools.ant.Target.execute(Target.java:392) 
     at org.apache.tools.ant.Target.performTasks(Target.java:413) 
     at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399) 
     at org.apache.tools.ant.Project.executeTarget(Project.java:1368) 
     at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java :41) 
     at org.apache.tools.ant.Project.executeTargets(Project.java:1251) 
     at org.apache.tools.ant.Main.runBuild(Main.java:811) 
     at org.apache.tools.ant.Main.startAnt(Main.java:217) 
     at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280) 
     at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109) 
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified 
     at java.lang.ProcessImpl.create(Native Method) 
     at java.lang.ProcessImpl.<init>(ProcessImpl.java:189) 
     at java.lang.ProcessImpl.start(ProcessImpl.java:133) 
     at java.lang.ProcessBuilder.start(ProcessBuilder.java:1021) 
     ... 23 more 


Total time: 50 seconds 

Answer 1

确保python是在你的PATH运行构建，或在exec任务中为您的python可执行文件指定绝对路径。

查看exec task的文档，了解有关使用Windows与非Windows的任何具体说明。请注意，您的特定错误有提到：

A common problem is not having the executable on the PATH. In case you get an error message Cannot run program "...":CreateProcess error=2. The system cannot find the path specified. have a look at your PATH variable. Just type the command directly on the command line and if Windows finds it, Ant should do it too. (Otherwise ask on the user mailinglist for help.) If Windows can not execute the program add the directory of the programm to the PATH (set PATH=%PATH%;dirOfProgram) or specify the absolute path in the executable attribute in your buildfile.