fontconfig: 2.12.6 -> 2.13.1

[Synthetica9]

Motivation for this change

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.

---

[dtzWill]

Be careful updating fontconfig, has impact on font caches and the configurations generated, esp re:backwards compatibility.

[wedens]

Yeah. I've had some problems trying to use Nix app that depends on fontconfig 2.12.6 on Arch host with fontconfig 2.13.1

errors from strace:

3651   │ access("/etc/fonts/fonts.conf", R_OK)   = 0
3652   │ stat("/etc/fonts/fonts.conf", {st_mode=S_IFREG|0644, st_size=2565, ...}) = 0
3653   │ openat(AT_FDCWD, "/etc/fonts/fonts.conf", O_RDONLY|O_CLOEXEC) = 7
3654   │ read(7, "<?xml version=\"1.0\"?>\n<!DOCTYPE "..., 8192) = 2565
3655   │ read(7, "", 8192)                       = 0
3656   │ close(7)                                = 0
3657   │ getrandom("\xec\x48\xb3\x7c\x90\x24\x2a\x51", 8, GRND_NONBLOCK) = 8
3658   │ write(2, "Fontconfig warning: \"/etc/fonts/"..., 53Fontconfig warning: "/etc/fonts/fonts.conf", line 5: ) = 53
3659   │ write(2, "unknown element \"its:rules\"", 27unknown element "its:rules") = 27
3660   │ write(2, "\n", 1
3661   │ )                       = 1
3662   │ write(2, "Fontconfig warning: \"/etc/fonts/"..., 53Fontconfig warning: "/etc/fonts/fonts.conf", line 6: ) = 53
3663   │ write(2, "unknown element \"its:translateRu"..., 35unknown element "its:translateRule") = 35
3664   │ write(2, "\n", 1
3665   │ )                       = 1
3666   │ write(2, "Fontconfig error: \"/etc/fonts/fo"..., 51Fontconfig error: "/etc/fonts/fonts.conf", line 6: ) = 51
3667   │ write(2, "invalid attribute 'translate'", 29invalid attribute 'translate') = 29
3668   │ write(2, "\n", 1
3669   │ )                       = 1
3670   │ write(2, "Fontconfig error: \"/etc/fonts/fo"..., 51Fontconfig error: "/etc/fonts/fonts.conf", line 6: ) = 51
3671   │ write(2, "invalid attribute 'selector'", 28invalid attribute 'selector') = 28
3672   │ write(2, "\n", 1
3673   │ )                       = 1
3674   │ write(2, "Fontconfig error: \"/etc/fonts/fo"..., 51Fontconfig error: "/etc/fonts/fonts.conf", line 7: ) = 51
3675   │ write(2, "invalid attribute 'xmlns:its'", 29invalid attribute 'xmlns:its') = 29
3676   │ write(2, "\n", 1
3677   │ )                       = 1
3678   │ write(2, "Fontconfig error: \"/etc/fonts/fo"..., 51Fontconfig error: "/etc/fonts/fonts.conf", line 7: ) = 51
3679   │ write(2, "invalid attribute 'version'", 27invalid attribute 'version') = 27
3680   │ write(2, "\n", 1
3681   │ )                       = 1
3682   │ write(2, "Fontconfig warning: \"/etc/fonts/"..., 53Fontconfig warning: "/etc/fonts/fonts.conf", line 9: ) = 53
3683   │ write(2, "unknown element \"description\"", 29unknown element "description") = 29
3684   │ write(2, "\n", 1
3685   │ ) 

I'm not sure what kind of incompatibility it is, but perhaps upgrading is not just a version bump.

[sauyon]

Slightly cleaner errors, since most of those syscalls are writes:

Fontconfig warning: "/etc/fonts/fonts.conf", line 5: unknown element "its:rules"
Fontconfig warning: "/etc/fonts/fonts.conf", line 6: unknown element "its:translateRule"
Fontconfig error: "/etc/fonts/fonts.conf", line 6: invalid attribute 'translate'
Fontconfig error: "/etc/fonts/fonts.conf", line 6: invalid attribute 'selector'
Fontconfig error: "/etc/fonts/fonts.conf", line 7: invalid attribute 'xmlns:its'
Fontconfig error: "/etc/fonts/fonts.conf", line 7: invalid attribute 'version'
Fontconfig warning: "/etc/fonts/fonts.conf", line 9: unknown element "description"
Fontconfig error: Cannot load config file from /etc/fonts/fonts.conf

https://cgit.freedesktop.org/fontconfig/commit/?id=9a0fcb948fe7346f6c68028b2e54ab600a2a2a6f

I believe this is just Arch shipping an updated configuration for fontconfig which isn't supported by the old 2.12.x, which can be fixed by using an older config.

[worldofpeace]

out of date #73795