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Subject: AW: uptodate
Date: Tue, 5 Dec 2006 07:45:21 +0100
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Thread-Topic: uptodate
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From: <Jan.Materne@rzf.fin-nrw.de>
To: <user@ant.apache.org>
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Try the <modified> selector instead of a mapper.

Jan=20

>-----Urspr=FCngliche Nachricht-----
>Von: Bailey, David [mailto:David.Bailey@pearson.com]=20
>Gesendet: Dienstag, 5. Dezember 2006 01:05
>An: Ant Users List
>Betreff: uptodate
>
>This seems like a problem which must have a very simple=20
>solution, but I can't find it.
>
>=20
>
>A single XML file is used to generate a large number of HTML=20
>files.  And I actually have nearly 100 such XML files.  These=20
>XML files rarely change, so I'd like to save time by using=20
><uptodate> to only regenerate the HTML when necessary. =20
>However, I can't figure out the correct way to define a mapper.
>
>=20
>
>I'm trying to use the following construct:
>
>=20
>
><target name=3D"gen_html" depends=3D"check_html" =
unless=3D"html_uptodate">
>
>            . . .
>
></target>
>
>=20
>
><target name=3D"check_html">
>
>            <uptodate property=3D"html_uptodate"
>
>                        =
srcfile=3D"${xmldir}/SubDir/${xml_filename}.xml">
>
>                        <mapper . . . />
>
>            </uptodate>
>
></target>
>
>=20
>
>Looking at my choices of available mappers, none seem to do=20
>what I want.
>I have attempted variants of the globmapper such as
>
>=20
>
><globmapper from=3D"." to=3D"${htmldir}/*.html" />
>
>=20
>
> . . . but it seems that globmappers don't work unless you=20
>include a * in the 'from' attribute.  I thought I would get it=20
>with the following regexp mapper:
>
>=20
>
><regexpmapper from=3D"\.*" to=3D"${htmldir}/*.html" />
>
>=20
>
> . . . but frustratingly, the regexpmapper interprets '*.html'
>literally, rather than interpolating the * as a wild card.  In=20
>fact, my experimentation indicates that the only regexp=20
>interpolation which occurs in the 'to' attribute is \1, \2,=20
>etc.  Similarly, if I abandon the <mapper> altogether and=20
>instead use the targetfile attribute, such as=20
>'targetfile=3D"${htmldir}/*.html"', the * is interpreted literally.
>
>=20
>
>Obviously I can write my own mapper, but I can't believe there=20
>isn't a solution out there with the tasks already available. =20
>Am I overlooking something?
>
>=20
>
>Thanks,
>
>--dave
>
>
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>Please notify the sender and delete all copies.=20
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