dream2nix/flake.nix
2022-08-01 18:58:00 +02:00

354 lines
10 KiB
Nix

{
description = "A framework for 2nix tools";
nixConfig = {
extra-trusted-public-keys = "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=";
extra-substituters = "https://nix-community.cachix.org";
};
inputs = {
nixpkgs.url = "nixpkgs/nixos-unstable";
### dev dependencies
alejandra.url = "github:kamadorueda/alejandra";
alejandra.inputs.nixpkgs.follows = "nixpkgs";
pre-commit-hooks.url = "github:cachix/pre-commit-hooks.nix";
pre-commit-hooks.inputs.nixpkgs.follows = "nixpkgs";
# upstream flake-utils dep not supporting `aarch64-darwin` yet
flake-utils-pre-commit.url = "github:numtide/flake-utils";
pre-commit-hooks.inputs.flake-utils.follows = "flake-utils-pre-commit";
devshell = {
url = "github:numtide/devshell";
flake = false;
};
### framework dependencies
# required for builder go/gomod2nix
gomod2nix = {
url = "github:tweag/gomod2nix";
flake = false;
};
# required for translator pip
mach-nix = {
url = "mach-nix";
flake = false;
};
# required for utils.satisfiesSemver
poetry2nix = {
url = "github:nix-community/poetry2nix/1.21.0";
flake = false;
};
# required for builder rust/crane
crane = {
url = "github:ipetkov/crane";
flake = false;
};
};
outputs = {
self,
alejandra,
devshell,
gomod2nix,
mach-nix,
nixpkgs,
poetry2nix,
pre-commit-hooks,
crane,
...
} @ inp: let
b = builtins;
l = lib // builtins;
lib = nixpkgs.lib;
supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
forSystems = systems: f:
lib.genAttrs systems
(system: f system nixpkgs.legacyPackages.${system});
forAllSystems = forSystems supportedSystems;
# To use dream2nix in non-flake + non-IFD enabled repos, the source code of dream2nix
# must be installed into these repos (using nix run dream2nix#install).
# The problem is, all of dream2nix' dependecies need to be installed as well.
# Therefore 'externalPaths' contains all relevant files of external projects
# which dream2nix depends on. Exactly these files will be installed.
externalPaths = {
mach-nix = [
"lib/extractor/default.nix"
"lib/extractor/distutils.patch"
"lib/extractor/setuptools.patch"
"LICENSE"
];
poetry2nix = [
"semver.nix"
"LICENSE"
];
crane = [
"lib/buildDepsOnly.nix"
"lib/buildPackage.nix"
"lib/cargoBuild.nix"
"lib/cleanCargoToml.nix"
"lib/findCargoFiles.nix"
"lib/mkCargoDerivation.nix"
"lib/mkDummySrc.nix"
"lib/writeTOML.nix"
"pkgs/configureCargoCommonVarsHook.sh"
"pkgs/configureCargoVendoredDepsHook.sh"
"pkgs/installFromCargoBuildLogHook.sh"
"pkgs/inheritCargoArtifactsHook.sh"
"pkgs/installCargoArtifactsHook.sh"
"pkgs/remapSourcePathPrefixHook.sh"
"LICENSE"
];
};
# create a directory containing the files listed in externalPaths
makeExternalDir = import ./src/utils/external-dir.nix;
externalDirFor = forAllSystems (system: pkgs:
makeExternalDir {
inherit externalPaths externalSources pkgs;
});
# An interface to access files of external projects.
# This implementation accesses the flake inputs directly,
# but if dream2nix is used without flakes, it defaults
# to another implementation of that function which
# uses the installed external paths instead (see default.nix)
externalSources =
lib.genAttrs
(lib.attrNames externalPaths)
(inputName: inp."${inputName}");
overridesDirs = [(toString ./overrides)];
# system specific dream2nix api
dream2nixFor = forAllSystems (system: pkgs:
import ./src rec {
externalDir = externalDirFor."${system}";
inherit externalPaths externalSources lib pkgs;
config = {
inherit overridesDirs;
};
});
docsCli = forAllSystems (
system: pkgs:
pkgs.callPackage ./src/apps/docs {
dream2nixDocsSrc = "${self}/docs/src";
}
);
# System independent dream2nix api.
# Similar to drem2nixFor but will require 'system(s)' or 'pkgs' as an argument.
# Produces flake-like output schema.
d2n-lib =
(import ./src/lib.nix {
inherit externalPaths externalSources overridesDirs lib;
nixpkgsSrc = "${nixpkgs}";
})
# system specific dream2nix library
// (forAllSystems (system: pkgs: dream2nixFor."${system}"));
in {
lib = d2n-lib;
# kept for compat
lib2 = d2n-lib;
# all apps including cli, install, etc.
apps = forAllSystems (
system: pkgs:
dream2nixFor."${system}".apps.flakeApps
// {
tests-unit.type = "app";
tests-unit.program =
b.toString
(dream2nixFor."${system}".callPackageDream ./tests/unit {
inherit self;
});
tests-examples.type = "app";
tests-examples.program =
b.toString
(dream2nixFor."${system}".callPackageDream ./tests/examples {
inherit self;
});
tests-all.type = "app";
tests-all.program =
l.toString
(dream2nixFor.${system}.utils.writePureShellScript
[
alejandra.defaultPackage.${system}
pkgs.coreutils
pkgs.gitMinimal
pkgs.nix
]
''
echo "check for correct formatting"
cp -r $WORKDIR ./repo
cd ./repo
${self.apps.${system}.format.program} --fail-on-change
cd -
echo "running unit tests"
${self.apps.${system}.tests-unit.program}
echo "checking flakes under ./examples"
${self.apps.${system}.tests-examples.program}
echo "running nix flake check"
cd $WORKDIR
nix flake show >/dev/null
nix flake check
'');
# passes through extra flags to treefmt
format.type = "app";
format.program =
l.toString
(pkgs.writeScript "format" ''
export PATH="${alejandra.defaultPackage.${system}}/bin"
${pkgs.treefmt}/bin/treefmt --clear-cache "$@"
'');
docs.type = "app";
docs.program = "${docsCli.${system}}/bin/d2n-docs";
}
);
# a dev shell for working on dream2nix
# use via 'nix develop . -c $SHELL'
devShells = forAllSystems (system: pkgs: let
makeDevshell = import "${inp.devshell}/modules" pkgs;
mkShell = config:
(makeDevshell {
configuration = {
inherit config;
imports = [];
};
})
.shell;
in rec {
default = dream2nix-shell;
dream2nix-shell = mkShell {
devshell.name = "dream2nix-devshell";
commands =
[
{package = pkgs.nix;}
{
package = pkgs.mdbook;
category = "documentation";
}
{
package = docsCli.${system};
category = "documentation";
help = "CLI for listing and viewing dream2nix documentation";
}
{
package = pkgs.treefmt;
category = "formatting";
}
{
package = alejandra.defaultPackage.${system};
category = "formatting";
}
]
# using linux is highly recommended as cntr is amazing for debugging builds
++ lib.optional pkgs.stdenv.isLinux {
package = pkgs.cntr;
category = "debugging";
};
devshell.startup = {
preCommitHooks.text = self.checks.${system}.pre-commit-check.shellHook;
dream2nixEnv.text = ''
export NIX_PATH=nixpkgs=${nixpkgs}
export d2nExternalDir=${externalDirFor."${system}"}
export dream2nixWithExternals=${dream2nixFor."${system}".dream2nixWithExternals}
if [ -e ./overrides ]; then
export d2nOverridesDir=$(realpath ./overrides)
else
export d2nOverridesDir=${./overrides}
echo -e "\nManually execute 'export d2nOverridesDir={path to your dream2nix overrides dir}'"
fi
if [ -e ../dream2nix ]; then
export dream2nixWithExternals=$(realpath ./src)
else
export dream2nixWithExternals=${./src}
echo -e "\nManually execute 'export dream2nixWithExternals={path to your dream2nix checkout}'"
fi
'';
};
};
});
checks = forAllSystems (system: pkgs: {
pre-commit-check = pre-commit-hooks.lib.${system}.run {
src = ./.;
hooks = {
treefmt = {
enable = true;
name = "treefmt";
pass_filenames = false;
entry = l.toString (pkgs.writeScript "treefmt" ''
#!${pkgs.bash}/bin/bash
export PATH="$PATH:${alejandra.defaultPackage.${system}}/bin"
${pkgs.treefmt}/bin/treefmt --clear-cache --fail-on-change
'');
};
cleanup = {
enable = true;
name = "cleaned";
entry = l.toString (pkgs.writeScript "cleaned" ''
#!${pkgs.bash}/bin/bash
for badFile in $(find ./examples | grep 'flake.lock\|dream2nix-packages'); do
rm -rf $badFile
git add $badFile || :
done
'');
};
is-cleaned = {
enable = true;
name = "is-cleaned";
entry = l.toString (pkgs.writeScript "is-cleaned" ''
#!${pkgs.bash}/bin/bash
if find ./examples | grep -q 'flake.lock\|dream2nix-packages'; then
echo "./examples should not contain any flake.lock files or dream2nix-packages directories" >&2
exit 1
fi
'');
};
};
};
});
packages = forAllSystems (system: pkgs: {
docs =
pkgs.runCommand
"dream2nix-docs"
{nativeBuildInputs = [pkgs.mdbook];}
''
mdbook build -d $out ${./.}/docs
'';
});
templates = {
simple = {
description = "Simple dream2nix flake";
path = ./templates/simple;
};
};
};
}