Properties specified on the command line are read-only. When NAnt sees
your property line it tries to set it and it can't because it is already
read-only. Use a guard to make sure that it is executed only if the
property does not exist. Example:
<?xml version="1.0"?>
<project name="Test">
<property name="config" value="Release"
unless="${property::exists('config')}" />
</project>
Notice I used single quotes to specify the property name. If you fail to
use single quotes then NAnt will try to evaluate config and you'll
likely get errors at some point.
--Edwin
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:nant-users-
> [EMAIL PROTECTED] On Behalf Of Craig Wagner
> Sent: Friday, November 19, 2004 4:48 PM
> To: [EMAIL PROTECTED]
> Subject: [Nant-users] Overwriting properties
>
> I'm sure this is something stupid, but I can't figure out how to
> overwrite a property from the command-line.
>
> I've got a simple build file.
>
> <?xml version="1.0"?>
> <project name="Test">
> <property name="config" value="Release" readonly="false" />
> </project>
>
> I run it from the command-line as follows:
>
> nant -D:config=Debug
>
> It always gives me an error:
>
> NAnt 0.85 (Build 0.85.1783.0; nightly; 11/18/2004)
> Copyright (C) 2001-2004 Gerry Shaw
> http://nant.sourceforge.net
>
> Buildfile: file:///C:/VSSLocal/Applications/Products/test.build
>
> [property] Read-only property "config" cannot be overwritten.
>
> BUILD SUCCEEDED - 0 non-fatal error(s), 1 warning(s)
>
> Total time: 0 seconds.
>
> What the heck am I doing wrong?
>
> ---
> Craig Wagner
>
>
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