3
0
Fork 0
forked from mirrors/nixpkgs
nixpkgs/pkgs/development/libraries/fontconfig/default.nix
Jan Tojnar edf2541f02
fontconfig: Only read versioned config dirs
Falling back to unversioned `/etc/fonts/conf.d` when versioned one does not exist
is problematic since it only occurs on non-NixOS systems and those are likely
to have a different version of fontconfig. When those versions use incompatible
elements in the config, apps using fontconfig will crash.

Instead, we are now falling back to the in-package `fonts.conf` file that loads
both the versioned global `conf.d` directory and the in-package `conf.d` since using
upstream settings on non-NixOS is preferable to not being able to use apps there.

In fact, we would not even need to link `fonts.conf`, as the in-package `fonts.conf`
will be always used unless someone creates the global one manually (the option is still
retained if one wants to write a custom NixOS module and to avoid unnecessary stat call on NixOS).

Additionally, since the `fonts.conf` will always load `conf.d` from the package, we no longer
need to install them to sytem `/etc` in the module. This needed some mucking with `50-user.conf`
which disables configs in user directories (a good thing IMO, NixOS module will turn it back on)
but otherwise, it is cleaner. The files are still prioritized by their name, regardless of their location.

See https://github.com/NixOS/nixpkgs/pull/73795#issuecomment-634370125 for more information.
2020-07-11 17:05:13 +02:00

131 lines
4.1 KiB
Nix

{ stdenv
, fetchpatch
, substituteAll
, fetchurl
, pkg-config
, freetype
, expat
, libxslt
, gperf
, dejavu_fonts
, autoreconfHook
}:
/** Font configuration scheme
- ./config-compat.patch makes fontconfig try the following root configs, in order:
$FONTCONFIG_FILE, /etc/fonts/${configVersion}/fonts.conf, ${fontconfig.out}/etc/fonts/fonts.conf
This is done not to override config of pre-2.11 versions (which just blow up)
and still use *global* font configuration at NixOS,
falling back to upstream defaults on non-NixOS.
- NixOS creates /etc/fonts/${configVersion}/fonts.conf link to $out/etc/fonts/fonts.conf,
and other modifications should go to /etc/fonts/${configVersion}/conf.d
- See ./make-fonts-conf.xsl for config details.
*/
let
configVersion = "2.13"; # bump whenever fontconfig breaks compatibility with older configurations
in
stdenv.mkDerivation rec {
pname = "fontconfig";
version = "2.13.92";
src = fetchurl {
url = "http://fontconfig.org/release/${pname}-${version}.tar.xz";
sha256 = "0kkfsvxcvcphm9zcgsh646gix3qn4spz555wa1jp5hbq70l62vjh";
};
patches = [
(substituteAll {
src = ./config-compat.patch;
inherit configVersion;
})
# Fix fonts not being loaded when missing included configs that have ignore_missing="yes".
# https://bugzilla.redhat.com/show_bug.cgi?id=1744377
(fetchpatch {
url = "https://gitlab.freedesktop.org/fontconfig/fontconfig/commit/fcada522913e5e07efa6367eff87ace9f06d24c8.patch";
sha256 = "1jbm3vw45b3qjnqrh2545v1k8vmb29c09v2wj07jnrq3lnchbvmn";
})
# Register JoyPixels as an emoji font.
# https://gitlab.freedesktop.org/fontconfig/fontconfig/merge_requests/67
(fetchpatch {
url = "https://gitlab.freedesktop.org/fontconfig/fontconfig/commit/65087ac7ce4cc5f2109967c1380b474955dcb590.patch";
sha256 = "1dkrbqx1c1d8yfnx0igvv516wanw2ksrpm3fbpm2h9nw0hccwqvm";
})
# Fix invalid DTD in reset-dirs.
# https://gitlab.freedesktop.org/fontconfig/fontconfig/merge_requests/78
(fetchpatch {
url = "https://gitlab.freedesktop.org/fontconfig/fontconfig/commit/a4aa66a858f1ecd375c5efe5916398281f73f794.patch";
sha256 = "1j4ky8jhpllfm1lh2if34xglh2hl79nsa0xxgzxpj9sx6h4v99j5";
})
];
outputs = [ "bin" "dev" "lib" "out" ]; # $out contains all the config
nativeBuildInputs = [
gperf
libxslt
pkg-config
autoreconfHook
];
buildInputs = [
expat
];
propagatedBuildInputs = [
freetype
];
configureFlags = [
"--with-arch=${stdenv.hostPlatform.parsed.cpu.name}"
"--with-cache-dir=/var/cache/fontconfig" # otherwise the fallback is in $out/
"--disable-docs"
# just <1MB; this is what you get when loading config fails for some reason
"--with-default-fonts=${dejavu_fonts.minimal}"
] ++ stdenv.lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
"--with-arch=${stdenv.hostPlatform.parsed.cpu.name}"
];
enableParallelBuilding = true;
doCheck = true;
# Don't try to write to /var/cache/fontconfig at install time.
installFlags = [ "fc_cachedir=$(TMPDIR)/dummy" "RUN_FC_CACHE_TEST=false" ];
postInstall = ''
cd "$out/etc/fonts"
xsltproc --stringparam fontDirectories "${dejavu_fonts.minimal}" \
--stringparam fontconfig "$out" \
--stringparam fontconfigConfigVersion "${configVersion}" \
--path $out/share/xml/fontconfig \
${./make-fonts-conf.xsl} $out/etc/fonts/fonts.conf \
> fonts.conf.tmp
mv fonts.conf.tmp $out/etc/fonts/fonts.conf
# Make it easier to remove user config in NixOS module.
mkdir -p $out/etc/fonts/conf.d.bak
mv $out/etc/fonts/conf.d/50-user.conf $out/etc/fonts/conf.d.bak
# update latest 51-local.conf path to look at the latest local.conf
substituteInPlace $out/etc/fonts/conf.d/51-local.conf \
--replace local.conf /etc/fonts/${configVersion}/local.conf
'';
passthru = {
inherit configVersion;
};
meta = with stdenv.lib; {
description = "A library for font customization and configuration";
homepage = "http://fontconfig.org/";
license = licenses.bsd2; # custom but very bsd-like
platforms = platforms.all;
maintainers = [ maintainers.vcunat ];
};
}