tjh.dev
nixpkgs mirror (for testing)
github.com/NixOS/nixpkgs
nix
1{
2 buildPackages,
3 writeText,
4 fontconfig,
5 lib,
6 runCommand,
7 stdenv,
8}:
9let
10 fontconfig' = fontconfig;
11in
12{
13 fontconfig ? fontconfig',
14 fontDirectories,
15}:
16
17let
18 fontDirsPath = writeText "font-dirs" ''
19 <!-- Font directories -->
20 ${lib.concatStringsSep "\n" (map (font: "<dir>${font}</dir>") fontDirectories)}
21 '';
22in
23runCommand "fc-cache"
24 {
25 preferLocalBuild = true;
26 allowSubstitutes = false;
27 }
28 ''
29 export FONTCONFIG_FILE=$(pwd)/fonts.conf
30
31 cat > fonts.conf << EOF
32 <?xml version='1.0'?>
33 <!DOCTYPE fontconfig SYSTEM 'urn:fontconfig:fonts.dtd'>
34 <fontconfig>
35 <include>${fontconfig.out}/etc/fonts/fonts.conf</include>
36 <cachedir>$out</cachedir>
37 EOF
38 cat "${fontDirsPath}" >> fonts.conf
39 echo "</fontconfig>" >> fonts.conf
40
41 # N.B.: fc-cache keys its cache entries by architecture.
42 # We must invoke the host `fc-cache` (not the build fontconfig) if we want
43 # the cache to be usable by the host.
44 mkdir -p $out
45 ${stdenv.hostPlatform.emulator buildPackages} ${lib.getExe' fontconfig "fc-cache"} -sv
46
47 # This is not a cache dir in the normal sense -- it won't be automatically
48 # recreated.
49 rm -f "$out/CACHEDIR.TAG"
50 ''