{

description = "Simon’s Improved Layout Engine";

# To make user overrides of the nixpkgs flake not take effect

inputs.nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";

inputs.flake-utils.url = "github:numtide/flake-utils";

inputs.gitignore = {

url = "github:hercules-ci/gitignore.nix";

inputs.nixpkgs.follows = "nixpkgs";

};

# https://nixos.wiki/wiki/Flakes#Using_flakes_project_from_a_legacy_Nix

inputs.flake-compat = {

url = "github:edolstra/flake-compat";

flake = false;

};

outputs = { self

, nixpkgs

, flake-utils

, flake-compat

, gitignore

}:

flake-utils.lib.eachDefaultSystem (system:

let

pkgs = import nixpkgs {

inherit system;

};

# TODO: Should this be replaced with libtexpdf package from nixpkgs? or

# should we keep it that way, so that it'd be easy to test new versions

# of libtexpdf when developing?

libtexpdf-src = builtins.fetchGit {

url = "https://github.com/sile-typesetter/libtexpdf";

rev = "${(pkgs.lib.fileContents "${self}/libtexpdf.git-rev")}";

};

inherit (gitignore.lib) gitignoreSource;

# https://discourse.nixos.org/t/passing-git-commit-hash-and-tag-to-build-with-flakes/11355/2

version_rev = if (self ? rev) then (builtins.substring 0 7 self.rev) else "dirty";

# Prepare a different luaEnv to be used in the overridden expression,

# this is also the place to choose a different lua interpreter, such as

# lua5_3 or luajit

luaEnv = pkgs.lua5_3.withPackages(ps: with ps; [

cassowary

cldr

cosmo

fluent

linenoise

loadkit

lpeg

lua-zlib

lua_cliargs

luaepnf

luaexpat

luafilesystem

luarepl

luasec

luasocket

luautf8

penlight

vstruct

# If we want to test things with lua5.2 or an even older lua, we uncomment these

#bit32

#compat53

]);

# Use the expression from Nixpkgs instead of rewriting it here.

sile = pkgs.sile.overrideAttrs(oldAttr: rec {

version = "${(pkgs.lib.importJSON ./package.json).version}-${version_rev}-flake";

src = pkgs.lib.cleanSourceWith {

# Ignore many files that gitignoreSource doesn't ignore, see:

# https://github.com/hercules-ci/gitignore.nix/issues/9#issuecomment-635458762

filter = path: type:

! (builtins.any (r: (builtins.match r (builtins.baseNameOf path)) != null) [

# Nix files

"flake.nix"

"flake.lock"

"default.nix"

"shell.nix"

# git commit and editing format files

".commitlintrc.yml"

"package.json"

".husky"

".editorconfig"

# CI files

".cirrus.yml"

".github"

"action.yml"

"azure-pipelines.yml"

"Dockerfile"

# Git files

".gitattributes"

".git"

]);

src = gitignoreSource ./.;

};

# Add the libtexpdf src instead of the git submodule.

# Also pretend to be a tarball release so sile --version will not say `vUNKNOWN`.

preAutoreconf = ''

rm -rf ./libtexpdf

# From some reason without this flag, libtexpdf/ is unwriteable

cp --no-preserve=mode -r ${libtexpdf-src} ./libtexpdf/

echo ${version} > .tarball-version

'';

# Don't build the manual as it's time consuming, and it requires fonts

# that are not available in the sandbox due to internet connection

# missing.

configureFlags = pkgs.lib.lists.remove "--with-manual" oldAttr.configureFlags;

nativeBuildInputs = oldAttr.nativeBuildInputs ++ [

pkgs.autoreconfHook

];

meta = oldAttr.meta // {

changelog = "https://github.com/sile-typesetter/sile/raw/master/CHANGELOG.md";

};

});

in rec {

devShells = {

default = pkgs.mkShell {

inherit (sile) checkInputs nativeBuildInputs buildInputs;

};

};

packages.sile = sile;

defaultPackage = sile;

apps = rec {

default = sile;

sile = {

type = "app";

program = "${self.defaultPackage.${system}}/bin/sile";

};

};

defaultApp = apps.sile;

}

);

}