Re: [jug-discussion] Appending a new property to the end of a property file?

[Erik Hatcher]

<propertyfile> uses Java's on java.util.Properties to write the file, 
so comments, except for a one-line header, get removed.  This is a 
frequent annoyance that folks encounter.

But, since you'll be happy with an append, you can do this:
        <echo file="file.properties" append="true">
      prop=${val}
        </echo>
Ant expands ${} property references.  You'll need to be sure that the 
text is appropriate for an .properties file (escaped for special 
characters and all).  And if you need to insert new lines, use 
${line.separator} (a JVM system property that Ant makes handy).

Another alternative would be to use a master .properties file with 
@TOKENS in it and use a filtering <copy> to replace tokens in the copy 
process.

        Erik
On Feb 27, 2005, at 2:10 AM, Chad Woolley wrote:
Hi,
Does anyone know how to prevent the Ant propertyfile task from 
randomly rearranging your property file and whacking all the comments?

Or alternately, some simple ant/maven based solution that just lets 
you append a new property to the end of a file?  I tried the 
replaceregexp task, but I'm not good enough with regexp to know how to 
append to the EOF.

I know I could write a program/task/plugin to do this, but I can't 
believe there's nothing out there that I could make work out of the 
box with a little tweaking...

Many thanks,
Chad
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