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|
{
buildPackages,
writeText,
fontconfig,
lib,
runCommand,
stdenv,
}:
let
fontconfig' = fontconfig;
in
{
fontconfig ? fontconfig',
fontDirectories,
}:
let
fontDirsPath = writeText "font-dirs" ''
<!-- Font directories -->
${lib.concatStringsSep "\n" (map (font: "<dir>${font}</dir>") fontDirectories)}
'';
in
runCommand "fc-cache"
{
preferLocalBuild = true;
allowSubstitutes = false;
}
''
export FONTCONFIG_FILE=$(pwd)/fonts.conf
cat > fonts.conf << EOF
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'urn:fontconfig:fonts.dtd'>
<fontconfig>
<include>${fontconfig.out}/etc/fonts/fonts.conf</include>
<cachedir>$out</cachedir>
EOF
cat "${fontDirsPath}" >> fonts.conf
echo "</fontconfig>" >> fonts.conf
# N.B.: fc-cache keys its cache entries by architecture.
# We must invoke the host `fc-cache` (not the build fontconfig) if we want
# the cache to be usable by the host.
mkdir -p $out
${stdenv.hostPlatform.emulator buildPackages} ${lib.getExe' fontconfig "fc-cache"} -sv
# This is not a cache dir in the normal sense -- it won't be automatically
# recreated.
rm -f "$out/CACHEDIR.TAG"
''
|
