in name of buffer, rather than el-get package name. Since we write what
looks like the command being executed, "apt-get install FOO", it's
confusing if FOO isn't the actual package being passed to apt-get.
Fixes#2358.
This avoids asking for root priviledges if it's not needed.
* methods/el-get-apt-get.el (el-get-dpkg-package-installed-p): Renamed
from el-get-dpkg-package-status, don't use shell.
(el-get-apt-get-install-if-needed): New function.
(el-get-register-method :apt-get): Use it as :install method.
Using just message makes it too easy to overlook. The warning only
triggers on installation (not update or init) so it shouldn't be too
annoying.
* methods/el-get-apt-get.el (el-get-dpkg-symlink): use lwarn instead of
message.
If the apt-get package doesn't contain any elisp files symlinking to the
non-existant /usr/share/emacs/site-lisp/<package> directory will leave
us with a broken link that will raise an error when we attempt to look
for autoloads, clean stale elc files and the like. In this case, simply
create an empty directory instead of a link.
* methods/el-get-apt-get.el (el-get-dpkg-symlink): call `make-directory'
instead of symlink when `debdir' doesn't exist.
It knows argument to eval-after-load is code, and that #' implies
existence of a function.
Some of the package.el functions have changed, but that will be dealt
with separately.
This includes teaching methods that they now work with a symbolp PACKAGE,
some more cleaning up, and some load-path adjustments now that a part of the
code is in a subdirectory (methods).
Also include some of the tests used to convince oneself that the refactoring
didn't break any and all use cases for el-get, with some rough documentation
about how to use them.
