Re: [jamboost] Boost.Build V2, load behaviour part 2.

From: Rene Rivera (grafik666_at_[hidden])
Date: 2002-03-31 13:44:54

On 2002-03-31 at 01:15 PM, david.abrahams_at_[hidden] (David Abrahams) wrote:

>> >Naw, tag is fine, but it has nothing to do with the module. It is a
>file
>> >identifier. Why don't you just derive that directly from the file
>(with
>> >perhaps a little path normalization/simplification?)
>>
>> True, it's a file ident in this case, but it doesn't have to be that
>in other
>> cases.
>
>explain, please?

One possible use would be to do multiple inclusion of the same file in the
same module scope. One could do this:

modules.load my-module : : : pass-1 ;
modules.load my-module : : : pass-2 ;

I'm not sure we'll ever use it that way. But it's there if we have to :-)

>> We could use the <some-jamfile-dir> as the ident, but that would
>change
>> the meaning of the "search" argument for everybody else. At that point
>having
>> a different "load" specifically for jamfiles is preferable. But then
>we have
>> two different places to maintain the load code :-(
>
>I'm still in the dark. Don't you want to use the full path to the file,
>including its name, as the identifier?

Not in the case of Jamfiles, since there's only one per directory. But yes, I
prefer using the whole path including the filename.

>> Of course, if the import question is resolvable, this becomes a moot
>point :-)
>
>"the import question?"

Importing variables from the project-root to the jamfile-module. If that where
possible, I could just: 1) load the project-root, 2) import the project-root
vars into the jamfile-module, 3) load the Jamfile into it's jamfile-module.

No need for the extra argument then.

>> Because they are considered options by the Jam executable. Which means
>that
>> they are not passed along as targets. Or maybe you mean to check the
>args and
>> insert fake targets to do the help?
>
>The latter.

Hmm, I may have to do that anyway, to be able to generate things like html
docs into files.

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