Kevin Dickover wrote:
you're not the only one to think this. The problem is that conceptually the <property> tag defines the default value but in terms of nant initialization the commandline value is set first before the <property> tag is processed so Nant sees the property already exists. This is, as you pointed out quite confusing which is why I proposed the <param> solution. Unfortunately that won't be going in before the 0.85 release as it will need a bit of work.Cool thanks. However that might want to be clarified in the docs. I assumed from "Specifies whether the value of a property should be overwritten if the property already exists (unless the property is read-only). The default is true. " that overwrite="true" meant that it could be over written. Obviously that was an incorrect assumption.
In some ways - the previous behaviour - where nant just silently ignored the <property> tag if the value was already set was better with regard to commandline args - the problem was that you'd get no feedback when trying to update a readonly property.
Ian
Kevin
-----Original Message-----
From: Gert Driesen [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 01, 2004 2:03 PM
To: Kevin Dickover; [EMAIL PROTECTED]
Subject: Re: [Nant-users] Params vs properties redux was: Nant .85 not
working with Draco.Net-Again
Kevin,
Just set overwrite to "false" :
<project name="Proptest" default="testProperty"> <property name="ENV" value="DEV" overwrite="false" readonly="false" /> <target name="testProperty"> <echo message="${ENV}" /> </target> </project>
Hope this helps,
Gert
----- Original Message ----- From: "Kevin Dickover" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, September 01, 2004 7:54 PM
Subject: Re: [Nant-users] Params vs properties redux was: Nant .85 not working with Draco.Net-Again
____________________________________________________________________________Assume a sample build file
<project name="Proptest" default="testProperty"> <property name="ENV" value="DEV" overwrite="true" readonly="false" /> <target name="testProperty"> <echo message="${ENV}" /> </target> </project>
When this is run the output is
C:\Temp\nantest>C:\nant\bin\NAnt.exe NAnt 0.85 (Build 0.85.1684.0; net-1.0.win32; nightly; 8/11/2004) Copyright (C) 2001-2004 Gerry Shaw http://nant.sourceforge.net
Buildfile: file:///C:/Temp/nantest/test.build Target(s) specified: testProperty
testProperty:
[echo] DEV
BUILD SUCCEEDED
Total time: 0.1 seconds.
However when I try to set ENV on the command line I lose - output follows
C:\Temp\nantest>C:\nant\bin\NAnt.exe -D:ENV=JOE NAnt 0.85 (Build 0.85.1684.0; net-1.0.win32; nightly; 8/11/2004) Copyright (C) 2001-2004 Gerry Shaw http://nant.sourceforge.net
Buildfile: file:///C:/Temp/nantest/test.build Target(s) specified: testProperty
BUILD FAILED
C:\Temp\nantest\test.build(2,3): Read-only property "ENV" cannot be overwritten.
Total time: 0 seconds.
Do I really need to go through the absurd little dance of setting up two
properties, one to accept command line input and one to set a default value
if the command line property has not been set? Or is my build bad? As you
can see I am using a fairly recent nightly build...
Kevin Dickover
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--
Ian MacLean, Developer, ActiveState, a division of Sophos
http://www.ActiveState.com
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