Re: AW: empty properties on command line

Hello Jan,

I think Basin is stating that if you invoke ant from the command line 
and pass it an explicit target to invoke (instead of whatever default 
target is configured for that project) and if you have a -D property 
which doesn't specify a value, then the explicit target name that you 
specified is ignored and instead Ant just runs the default target 
configured for that project.

I haven't had a chance to try it out myself, but having seen similar 
issues reported (outside of Ant) when -D with an empty property value is 
used in Windows, I wouldn't be surprised if this is Windows specific.

-Jaikiran

On 06/07/21 5:50 pm, [email protected] wrote:
> Maybe this?
>
> <project>
>    <property name="msg" value="default"/>
>    <echo>${msg}</echo>
> </project>
>
> C:\temp>ant
> Buildfile: C:\temp\build.xml
>       [echo] default
>
> BUILD SUCCESSFUL
> Total time: 0 seconds
>
> C:\temp>ant -Dmsg=hello
> Buildfile: C:\temp\build.xml
>       [echo] hello
>
> BUILD SUCCESSFUL
> Total time: 0 seconds
>
> C:\temp>ant -Dmsg=""
> Buildfile: C:\temp\build.xml
>       [echo]
>
> BUILD SUCCESSFUL
> Total time: 0 seconds
>
>
>
> Jan
>
> -----Ursprüngliche Nachricht-----
> Von: Basin Ilya <[email protected]>
> Gesendet: Montag, 5. Juli 2021 21:36
> An: [email protected]
> Betreff: empty properties on command line
>
> Hi list.
> Looks like it's well-known, but I can't find in the docs.
> Trying to pass a property with an empty value on the command line leads to
> ignoring explicit targets:
>
>      C:\16>ant -Daaa= clean
>      Buildfile: C:\16\build.xml
>      
>      default:
>           [echo] default
>      
>      BUILD SUCCESSFUL
>      Total time: 0 seconds
>      
>      C:\16>ant -Daaa=d clean
>      Buildfile: C:\16\build.xml
>      
>      clean:
>           [echo] clean
>      
>      BUILD SUCCESSFUL
>      Total time: 0 seconds
>
> Even Eclipse mimics this behavior in
> InternalAntRunner.processMinusDProperties()
>
>
> I expected some info here: https://ant.apache.org/manual/running.html
>
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