m2e-wtp错误：< path> /target/m2e-wtp/web-resources/META-INF/MANIFEST.MF（没有这样的文件或目录） [英] m2e-wtp error: <path>/target/m2e-wtp/web-resources/META-INF/MANIFEST.MF (No such file or directory)

问题描述

我使用m2e 1.2.0和m2e-wtp 0.16.0，偶尔我的Eclipse构建失败，出现错误：

 < path> /target/m2e-wtp/web-resources/META-INF/MANIFEST.MF（没有这样的文件或目录）
  

可以通过执行 Maven->更新项目... 暂时解决问题，但错误会在一段时间后回来。不确定什么是触发器....

有关如何永久解决问题的任何建议？

我发现，当我直接使用Maven命令行外部构建项目时，会触发该问题。这将删除m2e-wtp生成的默认MANIFEST.MF，并且在Eclipse中重建之前显然不会重新生成。

解决方案

早于Luna的Eclipse版本

我不确定这是否是最好的事情，但我按照说明提到的
这里关于摆脱自动生成的Web资源文件夹，这似乎也解决了丢失的MANIFEST.MF的问题：

$ b $仅在项目中单击b

• ：右键单击项目>属性> Maven> WTP：选中启用项目特定设置，然后取消选中Maven Archiver生成构建目录下的文件整个工作区中的
  
• ：Window> Preferences> Maven> WTP：取消选中Maven Archiver生成目录下的文件

当我们真正想要打包/构建项目时，我们实际上会生成我们的清单条目作为maven-war-plugin的一部分，b我不认为m2e-wtp使用这个。在任何情况下，清单文件对于我们在m2e-wtp创建用于eclipse中的构建无关。

Eclipse Luna及更高版本

对于Eclipse Luna，你必须去：

首选项> Maven> Java EE集成并取消选中Maven Archiver生成构建目录下的文件。

Eclipse Luna在项目属性和WTP部分没有路径

I use m2e 1.2.0 and m2e-wtp 0.16.0, and occasionally my Eclipse build fails with the error:

<path>/target/m2e-wtp/web-resources/META-INF/MANIFEST.MF (No such file or directory)

The problem can be temporarily solved by doing a Maven->Update project..., but the error will come back after a while. Not sure what exactly the trigger is....

Any suggestions on how to fix the issue permanently?

[Edit] I found that the issue is triggered when I build the project externally using the Maven command line directly. This will remove the default MANIFEST.MF that m2e-wtp generates, and it apparently doesn't get regenerated until you do a rebuild in Eclipse.

解决方案

Eclipse versions earlier than Luna

I'm not certain if this is the best thing to do but I followed the instructions mentioned here with regards to getting rid of the auto generated web resources folder and this seems to also resolve the issue with the missing MANIFEST.MF:

• on your project only : right-click on the project > Properties > Maven > WTP : check "Enable Project Specific Settings" and uncheck "Maven Archiver generates files under the build directory"
• on the whole workspace : Window > Preferences > Maven > WTP : uncheck "Maven Archiver generates files under the build directory"

We actually generate our manifest entries as part of the maven-war-plugin when we actually want to package/build the project, but I dont think m2e-wtp uses this. In any event, the manifest file is irrelevant for us in the build that m2e-wtp creates for use within eclipse.

Eclipse Luna and later

For Eclipse Luna you have to go:

Preferences > Maven > Java EE Integration and uncheck "Maven Archiver generates files under the build directory".

Eclipse Luna does not have the path at project Properties and the WTP section

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