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