https://issues.apache.org/bugzilla/show_bug.cgi?id=44980
Summary: Recursion in Ant
Product: Ant
Version: 1.7.0
Platform: PC
URL: http://mail-archives.apache.org/mod_mbox/ant-
dev/200805.mbox/%3ccd22733f0805111551h53e15254jc96a29389
[EMAIL PROTECTED]
OS/Version: Windows Vista
Status: NEW
Severity: normal
Priority: P2
Component: Core
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
Created an attachment (id=21953)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=21953)
Ant Recursion Patch
Ant has some support for recursing a target down a build hierarchy in the form
of the following:
- fileset can specify a list of directories or build files
- antcontrib:for can do iteration
However each target has to handle recursion itself.
I have developed a patch (roughly 30 extra lines of code across 6 files) adds
two new
*dynamic* properties to Ant:
1) ant.project.target - the default target of the current project
2) ant.current.target - a comma-separated list of the actual targets
that were invoked on the current project
These properties are updated automatically, similar to ant.file or
ant.project.name.
The "recurse" macro uses the antcontrib:for task to iterate over
multiple targets (btw, the currnet antcontrib jar is missing the "for" task in
its properties). The macro can accept an explicit list of
targets, but I also wanted to be able to recurse on the targets that
were actually invoked.
Here's how you would use it:
<!-- define the "recurse" macro -->
<typedef file="recurse.xml"/>
<!-- "subdirs" is the ordered list of sub-folders that "recurse" uses -->
<filelist dir="." id="subdirs" files="x1,x2"/>
<!-- invokes the macro on the current target(s), which may be the
ones specified or falls back to the default target -->
<recurse/>
Alternatively:
<!-- invoke the macro on the specified targets -->
<recurse targets="this,that,other"/>
I've attached the patch. The "recurse" macro is trivial using the new
properties:
<?xml version="1.0"?>
<antlib xmlns:antcontrib="antlib:net.sf.antcontrib">
<macrodef name="recurse">
<attribute name="targets" default="${ant.current.target}"/>
<sequential>
<condition property="recurseTargets" value="${ant.project.target}"
else="@{targets}">
<equals arg1="@{targets}" arg2="" />
</condition>
<antcontrib:for list="${recurseTargets}" param="target">
<sequential>
<subant target="@{target}">
<filelist refid="subdirs"/>
</subant>
</sequential>
</antcontrib:for>
</sequential>
</macrodef>
</antlib>
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