How can I extract version from a file name in Ant without using ant contrib?

Question

I am trying to scan a folder in ant script and extract the version out of it, suppose file name is abc-1.0.0.exe/dmg. I want to get the 1.0.0 in Ant. Is there any way I can do without using ant contrib? I only found help with ant contrib which I don't want to use.

Answer 1

You might be able to use something like this, based on the <pathconvert> task with a regexmapper.

Here's the directory structure in this example:

$ find folder
folder
folder/abc-1.0.0.exe
folder/abc-1.0.0.exe/dmg

Here's the Ant buildfile:

<fileset dir="folder" id="folder"/>

<echo message="file is: ${toString:folder}" />

<pathconvert property="version">
    <path path="${toString:folder}" />
    <regexpmapper from=".*-(.*).exe.*" to="\1" />
</pathconvert>

<echo message="version is: ${version}" />

Output:

 [echo] file is: abc-1.0.0.exe/dmg
 [echo] version is: 1.0.0