Conditionally including Flex libraries (SWCs) in mxmlc/compc ant tasks
I have been struggling trying to figure out how to conditionally include Flex libraries in an ant build based on a property that is set on the command line. I have tried a number of approaches with the <condit开发者_JS百科ion/>
task, but so far have not gotten it to work. Here is where I am currently.
I have an init target that includes condition tasks like this:
<condition property="automation.libs" value="automation.qtp">
<equals arg1="${automation}" arg2="qtp" casesensitive="false" trim="true"/>
</condition>
The purpose of this task is to set a property that determines the name of the patternset to be used when declaring the implicit fileset on a mxmlc or compc task. The pattern set referenced above is defined as:
<patternset id="automation.qtp">
<include name="automation*.swc"/>
<include name="qtp.swc"/>
</patternset>
The named patternset is then referenced by the mxmlc or compc task like this:
<compc>
<compiler.include-libraries dir="${FLEX_HOME}/frameworks/libs" append="true">
<patternset refid="${automation.libs}"/>
</compiler.include-libraries>
</compc>
This doesn't appear to work. At least the SWC size does not indicate that the additional automation libraries have been compiled in. I want to be able to specify a command line property that determine which patternset to use for various types of builds.
Does anyone have any ideas about how to accomplish this? Thanks!
If you can't get <patternset>
to work correctly, you might want to take a look at the <if>
<then>
and <else>
tasks provided by ant-contrib. We ended up doing something like this:
<target name = "build">
<if>
<equals arg1="automation.qtp" arg2="true"/>
<then>
<!--
- Build with QTP support.
-->
</then>
<else>
<!--
- Build without QTP support.
-->
</else>
</if>
</target>
There is some duplication of build logic between the if and else branch, but you can factor some of that out if you wrap <mxmlc>
with a macrodef.
The mxmlc task supports loading configuration files <load-config filename="path/to/flex-config.xml" />
. So, generate the config xml on the fly, by combining the echoxml task and if-then-else.
<echoxml file="path/to/flex-config.xml">
<flex-config>
<compiler>
<library-path append="true">
<path-element>${lib.qtp}</path-element>
</library-path>
</compiler>
</flex-config>
</echoxml>
If your needs are more complicated, you could even generate several xml configs and <load-config ... />
them all.
Personally, I find any logic very terse and ugly to write using Ant's conditions or if-then-else, XML is not a pretty language to use for programming. Luckily, it's possible to use more flexible approach - write a script to produce the config xml, before calling mxmlc. E.g. use the script task with your favorite scripting language
<script language="javascript">
<![CDATA[
// Create your XML dynamically here.
// Write that XML to an external file.
// Later, feed that file to mxmlc using `<load-config ... />`.
]]>
</script>
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