[build2] Working with multiple projects locally

[Per Edin]

Hi!

Boris, could you share some advice on how to work with multiple
projects locally? Without having to mess too much with remote
repositories, and whatnot.

I'm currently working on 4 related, but separate projects and tried
the following approach:

$ b create: build-default/,cc config.cxx=clang++

$ b configure: libone/@build-default/libone/
$ b configure: libtwo/@build-default/libtwo/
$ b configure: libthree/@build-default/libthree/
$ b configure: my-app/@build-default/my-app/

$ b build-default/

(my-app depends on libthree, which in turn depends on libone and
libtwo.) This all worked fine, no need to mess with config.import.*,
"depends: " in manifest files, etc. I imported libthree%lib{three} in
my-app and it just worked.

Then one day I needed to add dependencies to libthree and my-app (from
cppget) and I got stuck. I tried to use bdep instead:

$ rm -rf build-default/libthree/
$ cd libthree/
$ vi manifest # add depends: libssl
$ vi repositories.manifest # enable cppget
$ bdep config create ../build-default/libthree/
$ cd ..
$ b build-default/
error: build-default/libthree/ cannot be amalgamated

Any advice would be greatly appreciated!

Kind regards,
Per Edin