Propertyregex to read a CSV line and assign fields to variables - ant

Question

I have a csv/txt file with below entries
abc,123
xyz,678
ijk,921
I'm trying to read the file through for loop and assign first element to var1, and second to var2
var1=abc
var2=123
I need to use these variables to perform some task and return back to the loop to read the next line of the file and assign new values.
Below is what I have, and I'm not able to assign the variable
<loadfile property="message" srcFile="test.txt" />
<target name="compile">
<for param="line" list="${message}" delimiter="${line.separator}">
<sequential>
<echo>#{line}</echo>
<propertyregex property="var1"
input="#line"
regexp="/^(.+?),(.+)/"
select="\1" />
<echo message="${var1}" />
</sequential>
</for>
</target>
Below is the output I get, showing no assignment of value to var1.
[echo] abc,123
[echo] ${var1}
[echo] xyz,678
[echo] ${var1}
[echo] ijk,921
[echo] ${var1}

Answer 1

You have a couple of errors, the below loop body works for me, see output at the end.
The first problem is that the #{line} parameter substitution syntax in the for loop uses an antcontrib macrodef, and the {} brakets are not optional - you had missed them out of the input="" attribute, whereas in the echo task you had included them.
The second problem is that you need not specify enclosing slashes /../ in the rexexp= attribute.
<echo>#{line}</echo>
<propertyregex property="var1"
override="yes"
input="#{line}"
regexp="^(.+?),(.+)"
select="\1"/>
<propertyregex property="var2"
override="yes"
input="#{line}"
regexp="^(.+?),(.+)"
select="\2"/>
<echo message="${var1},${var2}" />
Output:
[echo] abc,123
[echo] abc,123
[echo] xyz,678
[echo] xyz,678
[echo] ijk,921
[echo] ijk,921