Evolving the syntax of PLS_* macros.

[dkorolev]

Hi @amdrozdov !

So this works. I have added:

• PLS_INCLUDE_HEADER_ONLY_CURRENT() -- self-explanatory,
• PLS_ADD(dst,repo) -- will clone repo as the directory dst,
• PLS_DEP(lib) -- will add the depencency, and
• PLS_ADD_DEP(lib,repo) -- will both clone and add the dependency, and it requires that the dependency name is the same as the name of the lib.

This enables:

PLS_ADD("wsServer", "https://github.com/current-deps/wsServer.git");
PLS_DEP("ws");

Ultimately, PLS_IMPORT is being deprecated. And we will add PLS_ADD_CURRENT_DEP(name), as a shortcut for current-deps/*, since every library (or at least most libraries) in current-deps will expose one (main) library, with the name matching the name of the repo.

Hope this works for you. Good to merge from my end!

Thanks,
Dima

Work in progress as of now, I will update this message once the PR is ready to review & merge.

[dkorolev]

(The force-pushes are me rebasing the safe_readlink() commit into this one.)

[amdrozdov]

LGTM