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From Evgeny <evgeny.zis...@gmail.com>
Subject Re: A way to create empty files
Date Tue, 12 Aug 2008 16:24:19 GMT
I'll just stick it into my build-macros.xml file, with the above
comment ... and forget about it :)

On Tue, Aug 12, 2008 at 7:22 PM, Matt Benson <gudnabrsam@yahoo.com> wrote:
> Complex... :(  To decipher the semantic implications
> of the provided solution, you're giving the touch task
> a resource collection which restricts the contents of
> another resource collection to those elements which do
> not exist, using an exists selector wrapped in a not
> selector.  The resource collection wrapped is the
> single-element resource collection consisting only of
> a particular file.
>
> See
> http://ant.apache.org/manual/CoreTypes/resources.html
> and
> http://ant.apache.org/manual/CoreTypes/resources.html#restrict
> in particular for more information.
>
> -Matt
>
> --- Evgeny <evgeny.zislis@gmail.com> wrote:
>
>> Oy, this looks complex ... but imho it's better than
>> having multiple targets.
>> Thanks.
>>
>> On Tue, Aug 12, 2008 at 6:13 PM, Matt Benson
>> <gudnabrsam@yahoo.com> wrote:
>> > Or, barring all these other suggestions, you could
>> > just use Ant >= 1.7 and write:
>> >
>> > <touch>
>> >  <restrict>
>> >    <file file="filetotouch" />
>> >    <not
>> >
>>
> xmlns="antlib:org.apache.tools.ant.types.resources.selectors">
>> >      <exists />
>> >    </not>
>> >  </restrict>
>> > </touch>
>> >
>> > Note that the componentdef addition to Ant 1.8
>> will
>> > obviate the need for the ns declaration of the not
>> > (and, by inheritance, the exists) element.
>> >
>> > Sorry for the delay in providing this solution,
>> > Matt
>> >
>> > --- Jim Showalter <jim.showalter@verizon.net>
>> wrote:
>> >
>> >> You could also write a java program to add the
>> >> functionality and then add it in via taskdef.
>> The
>> >> downside is that your build file would not work
>> on
>> >> other platforms unless you included the class
>> file
>> >> that implements the task.
>> >>
>> >> Jim
>> >>
>> >>
>> >> -----Original Message-----
>> >> From: Evgeny [mailto:evgeny.zislis@gmail.com]
>> >> Sent: Tuesday, August 12, 2008 3:53 AM
>> >> To: Ant Users List
>> >> Subject: Re: A way to create empty files
>> >>
>> >>
>> >> It's not that I am worried it wont work, just too
>> >> many targets makes
>> >> it all messy. And then even when I myself try to
>> >> decipher what goes
>> >> where, I need to follow a huge tree of logic in
>> >> dependencies. Since
>> >> Ant is more of a functional language, I would
>> rather
>> >> avoid all that
>> >> and just write one statement like <touch
>> file="new"
>> >> dontchangetimestamponexistingfile=true"/> or
>> >> something.
>> >>
>> >> Ahh, well.
>> >>
>> >> On Mon, Aug 11, 2008 at 10:48 PM, EJ Ciramella
>> >> <ejciramella@upromise.com> wrote:
>> >> > Nope, you will have this additional target that
>> >> tests for availability,
>> >> > then your "touch" target will have an if/unless
>> >> (depending on how you
>> >> > configure your "availability" target)
>> condition.
>> >> >
>> >> > This is typical.
>> >> >
>> >> > You shouldn't be too worried about many targets
>> >> springing up all over
>> >> > the place, as long as you don't provide a
>> >> description, they won't show
>> >> > during "ant -projecthelp" (which should be what
>> >> people are using to see
>> >> > what targets exist in a particular build file).
>> >> >
>> >> > -----Original Message-----
>> >> > From: Evgeny [mailto:evgeny.zislis@gmail.com]
>> >> > Sent: Monday, August 11, 2008 9:29 AM
>> >> > To: Ant Users List
>> >> > Subject: Re: A way to create empty files
>> >> >
>> >> > So there is no way to do this other than
>> creating
>> >> an additional target
>> >> > with an "if" attribute?
>> >> >
>> >> > On Mon, Aug 11, 2008 at 3:09 PM, Kevin Jackson
>> >> <foamdino@gmail.com>
>> >> > wrote:
>> >> >> I think you want to look at the Available task
>> >> >>
>> >> >>
>> >>
>> >
>>
> http://ant.apache.org/manual/CoreTasks/available.html
>> >> >>
>> >> >> Thanks,
>> >> >> Kev
>> >> >>
>> >> >>
>> >>
>> >
>>
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>> >> >>
>> >> >
>> >> >
>> >>
>> >
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>> >> >
>> >>
>> >
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>> >>
>> >
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>> >
>> >
>> >
>> >
>> >
>> >
>>
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