我有一个 ant 构建脚本，其中包含一个相当复杂的 <exec> 命令，其中包含许多<arg>标记，我正在尝试对其进行故障排除。我想知道是否可以在 ant 构建后查看整个命令行;要么在 Eclipse 调试器中，要么将其转储到文件中。
这是我正在处理的内容：
<exec executable='"@{sdk}/bin/mxmlc.exe"' failonerror="true" >
<arg line='-load-config "@{sdk}/frameworks/flex-config.xml"'/>
<!-- Flex Build Path -->
<!-- Source path -->
<!-- Main source folder: -->
<arg line='-compiler.source-path "@{project-dir}/src"'/>
<!-- Additional source folders outside of the main source folder: -->
<arg line='-compiler.source-path "@{project-dir}/inc/swf"'/>
<arg line='-compiler.source-path "@{project-dir}/inc/images"'/>
<!-- Output folder: -->
<arg line='-output "@{output}"'/>
<!-- Library path -->
<!-- Build path libraries: -->
<arg line='-compiler.library-path "@{libs}"'/>
<arg line='-compiler.library-path "@{sdk}/frameworks/libs"'/>
<arg line='-compiler.library-path "@{sdk}/frameworks/locale/en_US"'/>
<arg line='-compiler.library-path "${dcradswcs.flex.path}/libs"'/>
<arg line='-compiler.library-path "${dcradswcs.flex.path}/locale"'/>
<arg line='-compiler.library-path "${fiberswcs.flex.path}/libs"'/>
<arg line='-compiler.library-path "${fiberswcs.flex.path}/locale"'/>
<arg line='-compiler.library-path "${flexunitframework.flex.path}/flexunitframework/libs/version4libs/Common"'/>
<arg line='-compiler.library-path "${flexunitframework.flex.path}/flexunitframework/libs/version4libs/FlexProject"'/>
<arg line='-compiler.library-path "${flexunitframework.flex.path}/flexunitframework/locale/version4locale"'/>
<arg line='-compiler.library-path "${flexunitframework.flex.path}/flexunitframework/libs"'/>
<!-- <arg line='-compiler.library-path "C:/rms-it-apps/adobe/fb4/plugins/com.adobe.flexbuilder.dcrad_4.0.1.277662/dcradSwcs/4.0/libs"'/>
<arg line='-compiler.library-path "C:/rms-it-apps/adobe/fb4/plugins/com.adobe.flexbuilder.dcrad_4.0.1.277662/dcradSwcs/4.0/locale"'/>
<arg line='-compiler.library-path "C:/rms-it-apps/adobe/fb4/plugins/com.adobe.flexbuilder.dcrad_4.0.1.277662/fiberSwcs/4.0/libs"'/>
<arg line='-compiler.library-path "C:/rms-it-apps/adobe/fb4/plugins/com.adobe.flexbuilder.dcrad_4.0.1.277662/fiberSwcs/4.0/locale"'/>
<arg line='-compiler.library-path "C:/rms-it-apps/adobe/fb4/plugins/com.adobe.flexbuilder.flexunit_4.0.1.277662/flexunitframework/libs/version4libs/Common"'/>
<arg line='-compiler.library-path "C:/rms-it-apps/adobe/fb4/plugins/com.adobe.flexbuilder.flexunit_4.0.1.277662/flexunitframework/libs/version4libs/FlexProject"'/>
<arg line='-compiler.library-path "C:/rms-it-apps/adobe/fb4/plugins/com.adobe.flexbuilder.flexunit_4.0.1.277662/flexunitframework/locale/version4locale"'/>
<arg line='-compiler.library-path "C:/rms-it-apps/adobe/fb4/plugins/com.adobe.flexbuilder.flexunit_4.0.1.277662/flexunitframework/libs"'/> -->
<!-- Runtime shared libraries. Order matters. -->
<!-- Load framework libraries first -->
<arg line='-runtime-shared-library-path="@{sdk}/frameworks/libs/textLayout.swc","textLayout_1.1.0.604.swz",,"textLayout_1.1.0.604.swf"'/>
<arg line='-runtime-shared-library-path="@{sdk}/frameworks/libs/osmf.swc","osmf_flex.4.0.0.13495.swz",,"osmf_flex.4.0.0.13495.swf"'/>
<arg line='-runtime-shared-library-path="@{sdk}/frameworks/libs/framework.swc","framework_4.1.0.16076.swz",,"framework_4.1.0.16076.swf"'/>
<arg line='-runtime-shared-library-path="@{sdk}/frameworks/libs/spark.swc","spark_4.1.0.16076.swz",,"spark_4.1.0.16076.swf"'/>
<arg line='-runtime-shared-library-path="@{sdk}/frameworks/libs/sparkskins.swc","sparkskins_4.1.0.16076.swz",,"sparkskins_4.1.0.16076.swf"'/>
<arg line='-runtime-shared-library-path="@{sdk}/frameworks/libs/rpc.swc","rpc_4.1.0.16076.swz",,"rpc_4.1.0.16076.swf"'/>
<arg line='-runtime-shared-library-path="@{sdk}/frameworks/libs/datavisualization.swc","datavisualization_4.1.0.16076.swz",,"datavisualization_4.1.0.16076.swf"'/>
<!-- Load after framework libraries -->
<!-- Note: do not put spaces between comma delimited values -->
<arg line='${rsl.applicationSettings}'/>
<arg line='${rsl.authorization}'/>
<arg line='${rsl.autofill}'/>
<arg line='${rsl.customComponents}'/>
<arg line='${rsl.navigation}'/>
<arg line='${rsl.lookup}'/>
<!-- Libraries needed for QTP -->
<arg line="${qtp.arg1}"/>
<arg line="${qtp.arg2}"/>
<arg line="${qtp.arg3}"/>
<arg line="${qtp.arg4}"/>
<arg line="${qtp.arg5}"/>
<arg line="-verify-digests=false"/>
<!-- Flex Compiler -->
<!-- Compiler options -->
<arg line="-compiler.accessible=true"/>
<arg line="-compiler.strict=true"/>
<arg line="-warnings=true" />
<!-- Additional compiler arguments: -->
<arg line='-theme=@{sdk}/frameworks/themes/Halo/halo.swc -services "@{services-config}" -locale en_US'/>
<!-- Flex Server -->
<!-- Server location -->
<!-- Context root: -->
<arg line="-compiler.context-root=@{context-root}"/>
<!-- Miscellaneous -->
<arg line="-compiler.incremental=true"/>
<arg line="-compiler.keep-generated-actionscript=false"/>
<arg line="-compiler.verbose-stacktraces=true"/>
<arg line="-show-unused-type-selector-warnings=false"/>
<arg line="-optimize=true" />
<arg line="-debug=@{debug}" />
<arg line='"@{mxml}"'/>
</exec>
这是我得到的错误：
BUILD FAILED
C:devworkspacermsitepi2build.raytheon.suite.tomcat.xml:50: The following error occurred while executing this line:
C:devworkspacermsitepi2build.raytheon.flex.xml:33: The following error occurred while executing this line:
C:devworkspacermsitepi2build.raytheon.flex.xml:159: exec returned: 1
ant -v 通常可以解决问题，但您可能会发现您有很多输出需要查看。
那么一些好的老式回声呢：
<echoxml>
<exec executable="..." failonerror="true" >
<arg value="..."/>
<arg value="..."/>
...
</exec>
</echoxml>
用于在激活真实的东西之前测试您的东西（属性值、解析的属性等）！？
这就是我经常使用的，因为当我只需要检查特定部分时ant -verbose | debug太健谈了。之后，只需删除或注释echoxml标签即可。
对于 echoxml，您需要 Ant>= 1.7
尝试使用 log4j ANT 侦听器。它可以配置为在 Exec 任务输出上归零。
例
项目文件
$ tree
.
|-- build.xml
`-- lib
|-- log4j-1.2.16.jar
`-- log4j.properties
1 directory, 3 files
构建.xml
<project name="name" default="run">
<target name="run">
<exec executable="echo">
<arg line="hello world"/>
</exec>
</target>
</project>
log4j.properties
log4j.rootLogger=ERROR, LogFile
log4j.logger.org.apache.tools.ant.taskdefs.ExecTask=DEBUG
log4j.appender.LogFile=org.apache.log4j.FileAppender
log4j.appender.LogFile.layout=org.apache.log4j.PatternLayout
log4j.appender.LogFile.layout.ConversionPattern=[%6r] %8c{1} : %m%n
log4j.appender.LogFile.file=build.log
运行构建
需要指定侦听器和包含 log4j 依赖项的目录：
ant -listener org.apache.tools.ant.listener.Log4jListener -lib lib
在生成.log文件中生成以下输出
$ cat build.log
[ 0] ExecTask : Current OS is Linux
[ 14] ExecTask : Executing 'echo' with arguments:
'hello'
'world'
The ' characters around the executable and arguments are
not part of the command.
[ 20] ExecTask : hello world