First, "resolve" now just picks git commits. We don't expand
config-opts and patches, nor do we generate tree contents. This makes
the generated files *much* more human editable.
Next, fold "build-components" and "compose" into just "build". One
never really wants to just build components. This lets us eliminate
binary snapshots as a concept; instead we always have a combination of
source snapshot and component/ refs.
The "resolve" builtin now does a lot more heavy lifting; we expand the
manifest.json, and "build" consequently is less intelligent now, more
of a low-level implementation.
This way other meta-build projects could use it; mainly mock/pbuilder.
Also I don't have to keep running chown root:root; chmod u+s in a
separate root terminal after every install.
The collection of Python scripts here have gotten to the point where
we need to share code. Start refactoring things so that we have one
main command which imports subcommands as libraries.
Add a simple KEY=VALUE metadata file format, and rather than
assuming 'basename' at a low level, allow passing e.g. NAME=gtk3
to override "gtk+".
The wrapper scripts are annoying...for now let's just remove them.
One thing that made this take significantly longer than it might
have otherwise is that we have to keep PWD "up to date" - otherwise
we hit bugs in glibc's getcwd() implementation.
Colin Walters