Re: "Macro" expansion

Matt asks:

> 1) Where exactly can I use macro expansion of the form @foo:bar@ ?

It is not as precisely defined as it will need to be, but
the current rough answer is: in values (strings, tables
[both keys and values, after a patch this week], lists, and
code).

I will append my sample1/team.xml, which is the best example
right now.

Currently, the engine wants to see a <param> on the field
before it will do the macro expansion (which may or may not
use the param).

> ... For instance the following would be very nice:
> <dependency type="essential" name="qt" version-spec="== @param:QT_VERSION@"/>

An interesting possibility, but no we don't do that now.


> 2) Currently we can look up into certain tables ...
> . It would be Really Nice if we could do this for any
> arbitrary table field, not just ark-dirs.

You can.  See example below.

> What do you think?

You'll help me write the semantics part of the ARK conf-lang
for this :-?

Will

======================================
<team name="sample1" xml-version="1">
<description>
  A Sidai-style sample Arusha *site*
</description>

<contacts><list>
  <item>[email protected]</item>
</list></contacts>

<!-- *** CONFIGURE-ME *** -->
<!-- test-dir: area where you want ARK to put its dribblings;
     can be removed afterward.
  -->
<test-dir>/workspace/partain/try-ark</test-dir>

<!-- ark-src-dir: where your ARK source is, for all teams
     of interest (including your own).
  -->
<ark-src-dir>/workspace/partain/ark</ark-src-dir>

<!-- open-src-dir: where you keep your stash of
     open-source tarballs
  -->
<open-src-dir>/d/open-src</open-src-dir>

<!-- the single host to use for your sample1 test;
     you will need to prepare a your-team/host/slicker.xml
     (named appropriately) file.
  -->
<solo-host>slicker</solo-host>

<!-- the proto-host that characterizes your single host;
     you will need to prepare a your-team/host/sparc-solaris.xml
     (named appropriately) file.
  -->
<solo-host-type>sparc-solaris</solo-host-type>
<!-- *** END OF: CONFIGURE-ME *** -->

<ark-dirs>
  <param name="TEST_DIR">@team:test-dir@</param>
  <param name="SRC_DIR">@team:ark-src-dir@</param>
  <table>
  <entry name="ARK_SRC"> @param:SRC_DIR@ </entry>
  <entry name="ARK_STATE"> @param:TEST_DIR@/ark-state </entry>
  <entry name="OUR"> @param:TEST_DIR@/our </entry>
  <entry name="OUR_DEPLOY"> @param:TEST_DIR@/ark-deploy-host1 </entry>
  </table>
</ark-dirs>
</team>