This change allows the test framework to reliably specify
which plugins to load and use within the same process.
Previously, plugins were loaded by importing files and then
accessing the Plugin class' list of subclasses.
Now, it's possible to run dotbot multiple times without
plugins accruing across runs with different configurations
and CLI arguments.
In addition, this fixes some circular imports that were
previously avoided because plugins were imported in a function.
Dotbot had a hardcoded behaviour that the BASEDIR was always passed to
os.path.realpath which "returns the canonical path of the specified
filename, eliminating any symbolic links encountered in the path".
This might not always be desirable so this commit makes it configurable.
The use case where `canonicalize-path` comes in handy is the following:
You want to provide dotfiles in the Filesystem Hierarchy Standard under
`/usr/local/share/ypid_dotfiles/`. Now you want to provide
`.config/dotfiles` as a default in `/etc/skel`. When you now
pre-configure `/etc/skel` by running dotbot in it set has HOME, dotfiles
will refer to `/usr/local/share/ypid_dotfiles/` and not
`/etc/skel/.config/dotfiles` which does not look nice.
This is related to but not the same as the `relative` parameter used
with link commands.
Anish Athalye
Kurt McKee
Subho Banerjee
E. Keys
Robin Schneider
Ben Klein
Casey Rodarmor
Anish Athalye