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<head> |
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<meta http-equiv="Content-Language" content="en-us"></meta> |
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<title>MacroDef Task</title> |
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</head> |
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<body> |
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<h2><a name="macrodef">MacroDef</a></h2> |
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<h3>Description</h3> |
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<p> |
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This defines a new task using a <sequential> or <parallel> |
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nested task as a template. Nested elements <param> and |
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<element> are used to specify attributes and elements of |
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the new task. These get substituted into the <sequential> |
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or <parallel> task when the new task is run. |
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</p> |
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<p> |
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Introduced in ant1.6 <font color="red">Experimental</font>. |
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</p> |
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<h3>Parameters</h3> |
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<table border="1" cellpadding="2" cellspacing="0"> |
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<tr> |
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<td valign="top"><b>Attribute</b></td> |
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<td valign="top"><b>Description</b></td> |
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<td align="center" valign="top"><b>Required</b></td> |
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</tr> |
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<tr> |
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<td valign="top">name</td> |
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<td valign="top">the name of the new definition</td> |
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<td valign="top" align="center">Yes</td> |
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</tr> |
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<tr> |
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<td valign="top">uri</td> |
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<td valign="top"> |
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The uri that this definition should live in. |
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</td> |
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<td valign="top" align="center">No</td> |
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</tr> |
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</table> |
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<h3>Parameters specified as nested elements</h3> |
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<h4>param</h4> |
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<p> |
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This is used to specify attributes of the new task. The values |
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of the attributes get substituted into the templated task. |
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The attributes will be required attributes unless a default |
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value has been set. |
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</p> |
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<p> |
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This attribute is placed in the body of the templated |
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task using the ant property notation - ${attribute name}. |
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Note that is not an actual ant property. |
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</p> |
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<h3>Parameters</h3> |
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<table border="1" cellpadding="2" cellspacing="0"> |
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<tr> |
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<td valign="top"><b>Attribute</b></td> |
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<td valign="top"><b>Description</b></td> |
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<td align="center" valign="top"><b>Required</b></td> |
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</tr> |
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<tr> |
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<td valign="top">name</td> |
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<td valign="top">the name of the new attribute</td> |
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<td valign="top" align="center">Yes</td> |
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</tr> |
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<tr> |
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<td valign="top">default</td> |
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<td valign="top"> |
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the default value of the attribute. |
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</td> |
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<td valign="top" align="center">No</td> |
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</tr> |
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</table> |
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<h4>element</h4> |
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<p> |
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This is used to specify nested elements of the new task. |
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The contents of the nested elements of the task instance |
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are placed in the templated task at the tag name. |
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</p> |
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<h3>Parameters</h3> |
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<table border="1" cellpadding="2" cellspacing="0"> |
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<tr> |
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<td valign="top"><b>Attribute</b></td> |
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<td valign="top"><b>Description</b></td> |
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<td align="center" valign="top"><b>Required</b></td> |
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</tr> |
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<tr> |
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<td valign="top">name</td> |
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<td valign="top">the name of the new attribute</td> |
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<td valign="top" align="center">Yes</td> |
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</tr> |
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<tr> |
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<td valign="top">optional</td> |
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<td valign="top"> |
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if true this nested element is optional. Default is |
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false - i.e the nested element is required in |
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the new task. |
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</td> |
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<td valign="top" align="center">No</td> |
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</tr> |
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</table> |
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<h3>Examples</h3> |
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<p> |
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The following example defined a task called testing and |
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runs it. |
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</p> |
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<blockquote> |
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<pre> |
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<macrodef name="testing"> |
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<param name="v" default="NOT SET"/> |
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<element name="some-tasks" optional="yes"/> |
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<sequential> |
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<echo>v is ${v}</echo> |
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<some-tasks/> |
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</sequential> |
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</macrodef> |
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<testing v="This is v"> |
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<some-tasks> |
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<echo>this is a test</echo> |
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</some-tasks> |
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</testing> |
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</pre> |
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</blockquote> |
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<p> |
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The following fragment defines a task called <call-cc> which |
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take the attributes "target", "link" and "target.dir" and the |
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nested element "cc-elements". The body of the task |
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uses the <cc> task from the |
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<a href="http://ant-contrib.sourceforge.net/">ant-contrib</a> project. |
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</p> |
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<blockquote> |
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<pre> |
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<macrodef name="call-cc"> |
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<param name="target"/> |
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<param name="link"/> |
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<param name="target.dir"/> |
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<element name="cc-elements"/> |
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<sequential> |
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<mkdir dir="${obj.dir}/${target}"/> |
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<mkdir dir="${target.dir}"/> |
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<cc link="${link}" objdir="${obj.dir}/${target}" |
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outfile="${target.dir}/${target}"> |
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<compiler refid="compiler.options"/> |
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<cc-elements/> |
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</cc> |
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</sequential> |
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</macrodef> |
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</pre> |
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</blockquote> |
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<p> |
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This then can be used as follows: |
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</p> |
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<blockquote> |
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<pre> |
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<call-cc target="unittests" link="executable" |
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target.dir="${build.bin.dir}"> |
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<cc-elements> |
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<includepath location="${gen.dir}"/> |
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<includepath location="test"/> |
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<fileset dir="test/unittest" includes = "**/*.cpp"/> |
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<fileset dir="${gen.dir}" includes = "*.cpp"/> |
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<linker refid="linker-libs"/> |
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</cc-elements> |
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</call-cc> |
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</pre> |
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</blockquote> |
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<hr> |
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<p align="center">Copyright © 2003 Apache Software |
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Foundation. All rights Reserved.</p> |
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</body> |
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</html> |
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Peter Reilly