See end of this message for important breaking changes.
Previous behavior was to configure any installed package which caused
a lot of bad side effects and could make spacemacs unusable. This
behavior made little sense and does not fit with spacemacs.
This commit fixes this behavior by separating installed packages from
configured packages. In short dostspacemacs-download-packages variable
now only affect package installation. Packages are now configured if and
only if they are effectively *used* (i.e. listed in variable
dotspacemacs-configuration-layers or dotspacemacs-additional-packages).
IMPORTANT CHANGE: functions `configuration-layer/declare-used-layer` and
`configuration-layer/declare-used-layers` have been removed. These
functions have been introduced in develop branch only so the impact
should be minimal.
I think MELPA has an `old-names` back
[compatibility](https://github.com/melpa/melpa/issues/4159) measure for
cases like this, but for now it isn't working. And it's breaking all new
installs that use the java layer.
New interactive function
`spacsmacs/open-file-or-directory-in-external-app`, depending on the
value of prefix argument, it opens the current file or directory in
external app.
Saving a pkg-match regex to a temporary variable lets us avoid recomputing it on each
iteration. I didn't benchmark the performance impact, but unless there's a downside to
using `let*` vs `let`, it seems like a no-brainer.
Passing pkg-match to `directory-files` reduces the returned files to those that match the
regex rolling our own reduction.
For emacs 24.5 packages will be installed in .emacs.d/elpa/24.5, for
emacs 24.4 packages will be installed in .emacs.d/elpa/24.4, etc.
For a user that uses several emacs versions with the same config, the
packages for version X will be in .emacs.d/elpa/X and the packages for
version Y will be in .emacs.d/elpa/Y. This is instead of using the same
.emacs.d/elpa and possibly having copmiled elisp packages the are
incompatible with one of the emacs versions in use.
Rollback directories are also separated by version:
.cache/.rollback/24.5, .cache/.rollback/24.4, etc.
Current implementation, #1644, doesn't handle the nested snippet
expansion properly, so you end up with smarparens disabled. Very
annoying.
I improved the implementation to remember the current state of
smartaperns before a top-level snippet expansion and preserve on any
nested snippet expansions.
Also, some housekeeping of the related code:
* Move hook handlers to the `funcs.el`.
* Add comments about yasnippet hooks subtleties relevant to the issue.
Fixes#1512
Don't fallback to default init file when SPACMACSDIR is used and
$SPACEMACSDIR/init.el doesn't exist. The file will be created during
the startup process.
