我在Hudson上有一个项目，使用maven构建。它编译C++源代码以创建可在项目的其他部分中使用的可执行文件。它使用Visual Studio工具，特别是一个导致麻烦的工具。当它尝试加载midl程序时，找不到它。如果我登录到存放Hudson的服务器并尝试在该特定项目中运行mvn clean install，则会收到以下错误消息：
D:\Hudson\jobs\{project-name}>mvn clean install
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.
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[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.876s
[INFO] Finished at: Mon Jan 14 21:56:18 PST 2013
[INFO] Final Memory: 8M/154M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (build-tlb) on project interop: Command execution failed.
Cannot run program "midl" (in directory "D:\Hudson\jobs\{project-name}"): CreateProcess error=2, The system cannot find the file specified -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
解决这个问题的方式是加载Visual Studio工具：
D:\Hudson\jobs\{project-name}>%VS100COMNTOOLS%\vsvars32.bat
Setting environment for using Microsoft Visual Studio 2010 x86 tools.
完成此操作后，我成功生成了一份干净的构建版本：
D:\Hudson\jobs\{project-name}>mvn clean install
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.
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[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.331s
[INFO] Finished at: Mon Jan 14 21:59:06 PST 2013
[INFO] Final Memory: 13M/222M
[INFO] ------------------------------------------------------------------------
但是，当Hudson自动启动构建时，这种方法就不再适用了。我尝试通过执行以下步骤来加载那个bat文件（vsvars32.bat）：
pushd %VS100COMNTOOLS%
vsvars32.bat
popd
在开始maven进程之前，我知道这个工作是有效的，因为我在控制台输出中看到了这个信息：
C:\Apps\MicrosoftVisualStudio-10.0\Common7\Tools>vsvars32.bat
Setting environment for using Microsoft Visual Studio 2010 x86 tools.
但是每当到达实际使用MIDL的时候，我在BUILD FAILURE之后得到以下输出：
[INFO] o.h.m.e.h.MavenExecutionResultHandler - Build failed with exception(s)
[INFO] o.h.m.e.h.MavenExecutionResultHandler - [1] org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (build-tlb) on project interop: Command execution failed.
[DEBUG] Closing connection to remote
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (build-tlb) on project interop: Command execution failed. Cannot run program "midl" (in directory "D:\Hudson\jobs\{project-name}"): CreateProcess error=2, The system cannot find the file specified -> [Help 1]
我还在Hudson配置面板中设置了环境变量对 {VS100COMNTOOLS,C:\Apps\MicrosoftVisualStudio-10.0\Common7\Tools}。我不知道还需要做什么，请帮忙检查一下。