Question

I need to increment a number in a source file from an Ant build script. I can use the ReplaceRegExp task to find the number I want to increment, but how do I then increment that number within the replace attribute?

Heres what I’ve got so far:

<replaceregexp file='${basedir}/src/path/to/MyFile.java'     match='MY_PROPERTY = ([0-9]{1,});'     replace='MY_PROPERTY = \1;'/> 

In the replace attribute, how would I do

replace='MY_PROPERTY = (\1 + 1);' 

I can’t use the buildnumber task to store the value in a file since I’m already using that within the same build target. Is there another ant task that will allow me to increment a property?

Answer 1

You can use something like:

<propertyfile file='${version-file}'> <entry key='revision' type='string' operation='=' value='${revision}' /> <entry key='build' type='int' operation='+' value='1' />

so the ant task is propertyfile.