例如,对Maven项目运行以下命令:
mvn dependency:list
我需要从Maven中得到的 只有 这两行(从下面的输出中切出):
com.example.code_samples.maven_dependencies:direct_library:jar:0.0.1-SNAPSHOT:compile com.example.code_samples.maven_dependencies:indirect_library:jar:0.0.1-SNAPSHOT:compile
有没有办法(CLI--option)在干净的行,xml,json,…中仅查看此请求的信息?
--option
相反,输出看起来更像是非结构化日志。它没有已知的格式,并且在STDOUT中将所有类型的信息混合在一起。
[INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Reactor Build Order: [INFO] [INFO] direct_library [INFO] dependent_binary [INFO] indirect_library [INFO] maven_dependencies [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building direct_library 0.0.1-SNAPSHOT [INFO] ------------------------------------------------------------------------ Downloading: http://nexus:8081/nexus/content/repositories/snapshots/com/example/code_samples/maven_dependencies/indirect_library/0.0.1-SNAPSHOT/maven-metadata.xml Downloaded: http://nexus:8081/nexus/content/repositories/snapshots/com/example/code_samples/maven_dependencies/indirect_library/0.0.1-SNAPSHOT/maven-metadata.xml (2 KB at 16.1 KB/sec) [INFO] [INFO] --- maven-dependency-plugin:2.8:list (default-cli) @ direct_library --- [INFO] [INFO] The following files have been resolved: [INFO] junit:junit:jar:4.4:test [INFO] com.example.code_samples.maven_dependencies:indirect_library:jar:0.0.1-SNAPSHOT:compile [INFO] [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building dependent_binary 0.0.1-SNAPSHOT [INFO] ------------------------------------------------------------------------ Downloading: http://nexus:8081/nexus/content/repositories/snapshots/com/example/code_samples/maven_dependencies/direct_library/0.0.1-SNAPSHOT/maven-metadata.xml Downloaded: http://nexus:8081/nexus/content/repositories/snapshots/com/example/code_samples/maven_dependencies/direct_library/0.0.1-SNAPSHOT/maven-metadata.xml (2 KB at 86.2 K B/sec) [INFO] [INFO] --- maven-dependency-plugin:2.8:list (default-cli) @ dependent_binary --- [INFO] [INFO] The following files have been resolved: [INFO] com.example.code_samples.maven_dependencies:direct_library:jar:0.0.1-SNAPSHOT:compile [INFO] com.example.code_samples.maven_dependencies:indirect_library:jar:0.0.1-SNAPSHOT:compile [INFO] [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building indirect_library 3.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-dependency-plugin:2.8:list (default-cli) @ indirect_library --- [INFO] [INFO] The following files have been resolved: [INFO] none [INFO] [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building maven_dependencies 0.0.1-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-dependency-plugin:2.8:list (default-cli) @ maven_dependencies --- [INFO] [INFO] The following files have been resolved: [INFO] none [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] direct_library ..................................... SUCCESS [ 0.813 s] [INFO] dependent_binary ................................... SUCCESS [ 0.026 s] [INFO] indirect_library ................................... SUCCESS [ 0.013 s] [INFO] maven_dependencies ................................. SUCCESS [ 0.002 s] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 1.065 s [INFO] Finished at: 2015-03-24T12:10:01+08:00 [INFO] Final Memory: 18M/607M [INFO] ------------------------------------------------------------------------
更新
另外,我会接受使用Maven API来获取运行时数据的解决方案Collection<String>(而不是无法可靠解析的上述文本输出)。
Collection<String>
我看了一下Maven Invoker API,但我没有希望- 我的测试表明这只是从代码中调用Maven的一种方式。这些API不会返回运行时数据(只是错误代码,所有有用的信息会再次打印在日志中)。
我能够提供一个属性,以将所需的干净输出保存到文件中。
例如,-DoutputFile或-Doutput:
mvn dependency:list -DoutputFile=dependencies.output.txt mvn help:effective-pom -Doutput=effective.pom.xml
如果需要STDOUT,则为cat文件。
cat
即使它不是通用的,到目前为止,该解决方法仍可以为我解决所有情况。