libungif was merged into giflib in 2006, and hasn't been updated
since. All non-broken packages still using it build fine with giflib.
See <http://giflib.sourceforge.net/history.html>.
This approach applies to _all_ RUN_TEMACS calls and successfully removes -dev paths from the closure and reduces the closure size from ~1.4G to just under ~464M.
It's also less brittle than having in-tree patches.
continuation of #109595
pkgconfig was aliased in 2018, however, it remained in
all-packages.nix due to its wide usage. This cleans
up the remaining references to pkgs.pkgsconfig and
moves the entry to aliases.nix.
python3Packages.pkgconfig remained unchanged because
it's the canonical name of the upstream package
on pypi.
This makes it much easier to create customisations around emacs via
the a new convenience passthru attr:
- `emacs.pkgs`: What used to be emacsPackages is now `emacs.pkgs`
The previous versioned names `emacs*Packages` have been moved to
aliases.nix and are now considered deprecated in favour of `emacs*.pkgs`.
If I'm running an Emacs executable from emacsWithPackages as my main
programming environment, and I'm hacking on Emacs, or the Emacs
packaging in Nixpkgs, or whatever, I don't want the Emacs packages
from the wrapper to show up in the load path of that child Emacs. It
results in differing behaviour depending on whether the child Emacs is
run from Emacs or from, for example, an external terminal emulator,
which is very surprising.
To avoid this, pass another environment variable containing the
wrapper site-lisp path, and use that value to remove the corresponding
entry in EMACSLOADPATH, so it won't be propagated to child Emacsen.
siteVersionDir isn't a full path, it's just the name of the version
directory entry in $out/share/emacs, e.g. "27.1", so since
d1b0eef9b5 ("emacs: Don't use interpolation for version"), we've been
trying to remove a non-existent directory. This would have been
caught if we hadn't been giving -f to rm unnecessarily, because -f
suppresses errors. As well as fixing the path, I've removed the -f
from rm. Doing this to the line above as well revealed that rm-ing
$out/var was no longer necessary, since nothing has been put there
since ac23a7c459 ("emacs: 25.3 → 26.1") -- it would now only be
created if we set the --with-gameuser configure option, which we
don't.
