:install and :update

Hi,

I am using aap to create an OS image. It consists of several components, which
I gave their own subdir with their own aap recipe. I call them from a top
recipe as follows:

        @for d in expand2list(_no.Subdirs):
                :print $d
                :execute {pass} $d/main.aap install

One of the subdirs contains a C program, that I let aap compile, using
:program. However, when I run the top recipe, after succesfully installing
everything from my subdirs, it gives the following message:

Aap: Error in recipe "Default target" line 1: :update failed for "mini_httpd"

Now that is interesting, because I never specified the :update command
somewhere. It must be implicit then, but the manual is not very clear about
this (or I must have overlooked something). From the command reference it
checks whether a program needs to be updated. Exactly what does this do,
what is the intent and how dows it work?

I could perhaps use it for the the rest of my recipe, because currently all
the programs are still copied to my target directory without a check if they
were installed before or not. I tried to implement this test using something
akin to the freebsd ports collection, i.e. touching a file .install_done or
something, but that is not really what I would like. If :update could do this,
or of someone has a good suggestion on how to do that with aap, please let me
know.


Tim

-- 
Zen Microsystems: we're the om in .commmmmmmmm...


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