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Re: Inter-dependent modules

From: Eric Siegerman
Subject: Re: Inter-dependent modules
Date: Mon, 2 Dec 2002 13:15:00 -0500
User-agent: Mutt/1.2.5i

Just to clarify (not contradict) what a couple of people said:

On Sun, Dec 01, 2002 at 08:27:53PM -0800, Wayne Johnson wrote:
> You set up a module alias.  If
> you have module A and B, both of which use module C, you can define a
> module X with contains modules A and C, and Y which includes B and C.
> X -a A C
> Y -a B C

That only works if A, B, and C are all different directories.
Each sandbox directory must be backed by exactly one repository
directory.  If you think about the contents of the CVS/Repository
files, you'll see why this must be the case.

But the tree hierarchies and names need not correspond.  You can
have sandbox-directory X contain only some of the files from
repo-directory A.  CVSROOT/modules can help you to semi-automate
both of those things.  The only thing you can't do is mix
together *files* from more than one repo directory.

That is, you can do this:
        Sandbox         Repo
        X/*             A/*
        X/C/*           blah/common/*

Or this:
        X/*             A/*
        X/C/foo.js      blah/common/foo.js
        (not present)   blah/common/bar.js

but not this:
        X/foo.js        A/foo.js
        X/bar.js        blah/common/bar.js

On Mon, Dec 02, 2002 at 01:32:12AM -0500, Larry Jones wrote:
> Symbolic links to directories mostly work, although you may run into
> strange problems with some CVS commands.  Symbolic links to files
> subvert the CVS locking mechanism and thus should never be used under
> any conditions.

This refers to putting symlinks within the repo, or naming a
symlink in $CVSROOT.  Symlinks in sandboxes don't break, exactly
-- but CVS pretty much ignores them, so you have to use some
other tool, e.g. make, to maintain them.


|  | /\
|-_|/  >   Eric Siegerman, Toronto, Ont.        address@hidden
|  |  /
Just Say No to the "faceless cannonfodder" stereotype.
        - (an Orc site)

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