You're replacing the entire "Test2<tab><tab>=" line with the string "test2=xxxxx" which obviously doesn't contain the tab characters.
You should probably investigate more sophisticated ways of preserving the original tabs like match="^([ \t]*test2[ \t]*=)(.*)$" replace="\1xxxxxxx" I haven't tested it but something like that should preserve "test2" and all the tabs around it, while still replacing the bit you actually want to change, which is whatever comes after the = sign. HTH! -----Original Message----- From: Nehal Patel [mailto:nehalhpatel...@gmail.com] Sent: 13 January 2012 23:01 To: user@ant.apache.org Subject: Update property value in file and retaining format. Hello, Having an problem updating the value of in a property file and retaining the format. For example i have the following stuff.properties: test1 <tab> <tab> <tab> =aaa test2 <tab> <tab> <tab> =bbb test3 <tab> <tab> <tab> =ccc I run the following: <target name="update-stuff-properties"> <replaceregexp file="stuff.properties" match="^[ \t]*test2[ \t]*=.*$" replace="test2=zzzzzzzz" byline="true" /> </target> I get the following: test1 <tab> <tab> <tab> =aaa test2=zzzzzzzz test3 <tab> <tab> <tab> =ccc I must be missing something on how to retain the " <tab> <tab> <tab> " which proceed the "=". Thanks. --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@ant.apache.org For additional commands, e-mail: user-h...@ant.apache.org ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________ --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@ant.apache.org For additional commands, e-mail: user-h...@ant.apache.org