Is it possible to have a dynamically set attribute in Ant?
At the moment all of our wars have the same name: "mywar.war". I'd like to have wars built with JDK6 to be "mywar-1.6.war" and those built with JDK7 to still just be "mywar.war".
Currently:
<war warfile="${dist.dir}/mywar.war">
..
<war />
I can include the Java version like this:
<war warfile="${dist.dir}/mywar-${ant.java.version}.war">
But what I'd like to have is the logic to do something like this:
if (${ant.java.version} == "1.6") {
war.name="mywar-${ant.java.version}";
} else {
war.name="mywar";
}
<war warfile="${dist.dir}/${war.name}.war">
Is there a correct way to go about that?
The way to set properties conditionally is to use the condition task:
<condition property="war.suffix" value="-1.6" else="">
<equals arg1="${ant.java.version}" arg2="1.6"/>
</condition>
<war warfile="${dist.dir}/mywar${war.suffix}.war">
The trick here is that the else="" means that war.suffix will be an empty string on any version other than 1.6.
Yes you can use some thing like that but it's not available in ant as such. You will have to download ant-contrib.jar
And then you have some thing like this
<if>
<equals arg1="${ant.java.version}" arg2="1.6" />
<then>
war.name="mywar-${ant.java.version}";
</then>
<else>
war.name="mywar";
</else>
</if>
See this link for ant contrib
Related
I have two directories that I need to compare for having same files. I succesfully do this as follows:
<fileset dir="d:\test" id="onlyinbar">
<not>
<present targetdir="A_DIR"/>
</not>
</fileset>
<echo>these files are only in bar : ${toString:onlyinbar}</echo>
<fileset dir="A_DIR" id="differentbarfoo">
<different targetdir="d:\test" ignoreFileTimes="true"/>
</fileset>
<echo>these files are different in bar compared to foo : ${toString:differentbarfoo}</echo>
However, I need to issue an other task if either of these are true. So long the <condition> tag does seem to support only file to file comparison and I cannot see how to assign a property within the <fileset> tag. Help will be appreciated.
We needed to avoid any third party contribs for this solution. My major problem was the combination of the tags. We knew that our "tests" i.e fileset tags had to be in the condition but didn't know how. The resourcecount though short out the issue:
<target name="export-report-icons" description="A description">
<condition property="test2" else="false">
<or>
<resourcecount when="gt" count="0" property="flength">
<fileset dir="d:\test" id="onlyinbar">
<present targetdir="DIRs_A" present="srconly"/>
</fileset>
</resourcecount>
<resourcecount when="gt" count="0" property="flength">
<fileset dir="DIR_A" id="differentbarfoo">
<different targetdir="d:\test" ignoreFileTimes="true"/>
</fileset>
</resourcecount>
</or>
</condition>
</target>
<target name="copyThis" depends="export-report-icons" if="${test2}">
....
</target>
So what this does, sets an OR for the case that one of the two filesets succeeds, the counter wraps the fileset resource so that it can be hosted under the condition and the condition has a property true or false depending on ORed counts. The "copy-This" target executes if the ${test2} is true. Please note that if you set id=test2 it will always qualify as true as in this case it checks for value presence.
The <union> set operator groups resources from multiple collections into one collection.
Similarly, take a look at <intersect> and <difference>.
You mention "if", which I assume refers to the <if> task from the third-party Ant-Contrib library. Here's an example that echoes if the filesets combined by <union> match any files:
<if>
<resourcecount when="gt" count="0">
<union id="Check">
<resources refid="onlyinbar"/>
<resources refid="differentbarfoo"/>
</union>
</resourcecount>
<then>
<echo>There are differences: ${toString:Check}</echo>
</then>
</if>
I am trying to compare the value of a properties variable with a string as following
<if>
<equals "${mat.projectName}"="seal">
<then>
When done so, I'm getting following message.
Element type "equals" must be followed by either attribute specifications,">" or
"/>"
I'm using eclipse framework to do this.
Read the manual first:
http://ant.apache.org/manual/Tasks/conditions.html
clearly, from the manual we know for equals:
arg1 First value to test
arg2 Second value to test
So it should be
<if>
<equals arg1="${mat.projectName}" arg2="seal" />
<then>
...
I recommend you to read guides about XML first, and then, Ant's manual.
Update:
<if> task is not provided by Ant; it is provided by Ant-Contrib. So you need <taskdef>.
For example, I have ant-contrib.jar put in my project's lib directory (${basedir}/lib), so I can write the following:
<taskdef resource="net/sf/antcontrib/antcontrib.properties">
<classpath>
<pathelement location="lib/ant-contrib.jar"/>
</classpath>
</taskdef>
For more, you can check taskdef's manual page, as well as Ant-contrib's webpage:
http://ant.apache.org/manual/Tasks/taskdef.html
http://ant-contrib.sourceforge.net/
Exactly what you're error message says...
Element type "equals" must be followed by either attribute specifications,">" or "/>"
You want this:
<if>
<equals arg1="${mat.projectName}" arg2="seal"/>
<then>
<yadda, yadda, yadda/>
</then>
</if>
This is XML, so you need parameters with values. Take a look at the equals condition on this page. It takes two parameters.
Notice the format of the <if>. The condition ends with a />. The <then> is a sub-entity of the <if>, and the if clause is a sub-entity of the <then> clause. Notice that you basically indent twice.
If you're doing a not equals condition, it would look like this:
<if>
<not>
<equals arg1="${mat.projectName}" arg2="seal"/>
</not>
<then>
<yadda, yadda, yadda/>
</then>
</if>
In Ant, how can I test if a property ends with a given value?
For example
<property name="destdir"
value="D:\FeiLong Soft\Essential\Development\repository\org\springframework\spring-beans" />
how can I test if ${destdir} ends with "spring-beans"?
additional：
In my ant-contrib-1.0b3.jar, without 'endswith' task~~
You can test if ${destdir} ends with "spring-beans" like this (assuming you have ant-contrib, and are using Ant 1.7 or later).
<property name="destdir" value="something\spring-beans" />
<condition property="destDirHasBeans">
<matches pattern=".*spring-beans$" string="${destdir}" />
</condition>
<if>
<equals arg1="destDirHasBeans" arg2="true" />
<then>
$destdir ends with spring-beans ...
</then>
<else> ...
</else>
</if>
The '$' in the regex pattern ".*spring-beans$" is an anchor to match at the end of the string.
As Matteo, Ant-Contrib contains a lot of nice stuff, and I use it heavily.
However, in this case can simply use the <basename> task:
<basename property="basedir.name" file="${destdir}"/>
<condition property="ends.with.spring-beans">
<equals arg1="spring-beans" arg2="${basedir.name}"/>
<condition>
The property ${ends.with.spring-beans} will contain true if ${destdir} ends with string-beans and false otherwise. You could use it in the if or unless parameter of the <target> task.
You can use the EndWith condition from Ant-Contrib
<endswith string="${destdir}" with="spring-beans"/>
For example
<if>
<endswith string="${destdir}" with="spring-beans"/>
<then>
<!-- do something -->
</then>
</if>
Edit
<endswith> is part of the Ant-Contrib package that has to be installed and enabled with
<taskdef resource="net/sf/antcontrib/antlib.xml"/>
The JavaScript power can be used for string manipulation in the ANT:
<script language="javascript"> <![CDATA[
// getting the value for property sshexec.outputproperty1
str = project.getProperty("sshexec.outputproperty1");
// get the tail , after the separator ":"
str = str.substring(str.indexOf(":")+1,str.length() ).trim();
// store the result in a new property
project.setProperty("res",str);
]]> </script>
<echo message="Responce ${res}" />
This is what I am trying to achieve:
if a property is set then call antcall target. is this doable? can someone tell me how?
<condition>
<isset property="some.property">
<antcall target="do.something">
</isset>
</condition>
Something like this should work:
<if>
<isset property="some.property"/>
<then>
<antcall target="do.something"/>
</then>
</if>
If then conditions require ant-contrib, but so does just about anything useful in ant.
I know I'm really late to this but here is another way to do this if you are using an of ant-contrib where if doesn't support a nested antcall element (I am using antcontrib 1.02b which doesn't).
<target name="TaskUnderRightCondition" if="some.property">
...
</target>
You can further expand this to check to see if some.property should be set just before this target is called by using depends becuase depends is executed before the if attribute is evaluated. Thus you could have this:
<target name="TestSomeValue">
<condition property="some.property">
<equals arg1="${someval}" arg2="${someOtherVal}" />
</condition>
</target>
<target name="TaskUnderRightCondition" if="some.property" depends="TestSomeValue">
...
</target>
In this case TestSomeValue is called and, if someval == someOtherVal then some.property is set and finally, TaskUnderRightCondition will be executed. If someval != someOtherVal then TaskUnderRightCondition will be skipped over.
You can learn more about conditions via the documentation.
Consider also you can invoke groovy for these purposes:
<use-groovy/>
<groovy>
if (Boolean.valueOf(properties["some.property"])) {
ant.project.executeTarget("do.something")
}
</groovy>
I want to overwrite the hosts file on the Windows machine if the user allows it:
<input message="Do you want to overwrite the HOSTS file?"
addproperty="overwrite.hosts" validargs="yes,no" />
<copy tofile="${env.WINDIR}/system32/drivers/etc/hosts.backup">
<fileset file="${env.WINDIR}/system32/drivers/etc/hosts" />
</copy>
<copy todir="${env.WINDIR}/system32/drivers/etc">
<fileset file="${trainer.dir}/hosts" />
</copy>
How do I do the copies only if the user says yes?
EDIT:
I tried this:
<input message="Do you want to overwrite the HOSTS file?" addproperty="overwrite.hosts" validargs="yes,no" />
<if>
<equals arg1="${overwrite.hosts}" arg2="yes" />
<then>
<copy tofile="${env.windir}/system32/drivers/etc/hosts.backup">
<fileset file="${env.windir}/system32/drivers/etc/hosts">
</fileset>
</copy>
<copy todir="${env.windir}/system32/drivers/etc">
<fileset file="${trainer.dir}/hosts">
</fileset>
</copy>
</then>
</if>
and I get this output:
C:\trainer\build.xml:16: Problem: failed to create task or type if
Cause: The name is undefined.
Action: Check the spelling.
Action: Check that any custom tasks/types have been declared.
Action: Check that any <presetdef>/<macrodef> declarations have taken place.
I'm an ant rookie... What do I need to do?
You could use a condition or a if task for that. (The latter is part of the ant-contrib project.)
You can use an "if" parameter on a target to make it conditional on the property being set.
I've never used the "input" task -- I didn't know it existed until just now (thanks for the heads up!) -- but a quick look at the documentation indicates that it sets the named property to the value entered, i.e. after an "input" the property is always set. So I guess you would need a "condition" to test the value and set or not set some other property.
Something like this. I just ran a quick test and this does work. Namely, if you answer the question "y" it prints the message, and if you answer "n" it does not.
<project name="test" default="do.whatever">
<target name="decide.do.whatever">
<input message="So you wanna do this or not?" validargs="y,n" addproperty="wanna"/>
<condition property="wanna.yes">
<equals arg1="${wanna}" arg2="y"/>
</condition>
</target>
<target name="do.whatever" depends="decide.do.whatever" if="wanna.yes">
<echo message="Yeah he wannas."/>
</target>
</project>