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Nix

{
description = "diwt";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
flake-compat = {
url = "github:edolstra/flake-compat";
flake = false;
};
nix-filter = {
url = "github:numtide/nix-filter";
};
};
outputs = {
self,
nixpkgs,
nix-filter,
...
}: let
projname = "diwt";
# to work with older version of flakes
lastModifiedDate =
self.lastModifiedDate or self.lastModified or "19700101";
# Generate a user-friendly version number.
version = "v0.0.0";
# System types to support.
supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
# Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
# Nixpkgs instantiated for supported system types.
nixpkgsFor = forAllSystems (system:
import nixpkgs {
inherit system;
overlays = [
# no overlay imports atm
# (import ./overlay.nix)
];
});
in rec {
formatter = forAllSystems (
system:
nixpkgsFor.${system}.alejandra
);
packages = forAllSystems (system: let
pkgs = nixpkgsFor.${system};
inherit (pkgs) lib overlays; # -> lib = pkgs.lib;overlays = pkgs.overlays;
in rec {
diwt = with pkgs;
buildGo119Module rec {
pname = "${projname}";
buildInputs = [
go
];
nativeBuildInputs = [pkgconfig];
overrideModAttrs = _: {
# GOPROXY = "direct";
CGO_ENABLED = 0;
GOFLAGS = "-buildmode=pie -trimpath -mod=readonly -modcacherw";
};
inherit version;
doCheck = true;
# use go.mod for managing go deps, instead of vendor-only dir
proxyVendor = true;
tags = []; # go "-tags" to build with
ldflags = [
"-s"
"-w"
"-X main.version=${version}"
];
# dont't forget to update vendorSha256 whenever go.mod or go.sum change
vendorSha256 = "sha256-pQpattmS9VmO3ZIQUFn66az8GSmB4IvYhTTCFn6SUmo=";
# In 'nix develop', we don't need a copy of the source tree
# in the Nix store.
src = nix-filter.lib.filter {
# when in doubt, check out
# https://github.com/numtide/nix-filter#design-notes
# tl;dr: it'd be best to include folders, however there are
# currently issues with that approach.
root = lib.cleanSource self;
include = [
./.
];
exclude = [
./flake.nix
./flake.lock
./default.nix
./shell.nix
./README.md
./.envrc
./.drone.star
./.gitattributes
./.gitignore
./.golangci.yml
./.editorconfig
./.pre-commit-config.yaml
# nix result symlink
./result
# the entire .git folder
./.git
# badges folder
./.badges
];
};
meta = {
description = "diwt";
homepage = "https://git.dotya.ml/wanderer/diwt";
license = lib.licenses.gpl3;
maintainers = ["wanderer"];
platforms = lib.platforms.linux ++ lib.platforms.darwin;
};
};
default = diwt;
});
apps = forAllSystems (system: rec {
diwt = {
type = "app";
program = "${self.packages.${system}.${projname}}/bin/${projname}";
};
default = diwt;
});
devShells = forAllSystems (
system: let
pkgs = import nixpkgs {
inherit system;
overlays = [
# (import ./overlay.nix)
];
};
goPkgs = import nixpkgs {
useFetched = true;
inherit system;
overlays =
self.overlays
or []
++ [
# (import ./overlay.nix)
];
};
gob = pkgs.writeShellScriptBin "gob" ''
cd $(git rev-parse --show-toplevel)
go build -v ./...
'';
gota = pkgs.writeShellScriptBin "gota" ''
cd $(git rev-parse --show-toplevel)
go test ./...
'';
gogen = pkgs.writeShellScriptBin "gogen" ''
cd $(git rev-parse --show-toplevel)
go generate -v ./report
'';
upcache = pkgs.writeShellScriptBin "upcache" ''
## refs:
## https://fzakaria.com/2020/08/11/caching-your-nix-shell.html
## https://nixos.wiki/wiki/Caching_nix_shell_build_inputs
nix-store --query --references $(nix-instantiate shell.nix) | \
xargs nix-store --realise | \
xargs nix-store --query --requisites | \
cachix push ${projname}
nix build --json \
| jq -r '.[].outputs | to_entries[].value' \
| cachix push ${projname}
'';
add-license = pkgs.writeShellScriptBin "add-license" ''
go run github.com/google/addlicense@v1.0.0 -v \
-c "wanderer <wanderer at dotya.ml>" \
-l "GPL-3.0-or-later" -s -ignore "*.yaml" .
'';
in {
default = with pkgs;
mkShell
{
name = "${projname}-" + version;
GOFLAGS = "-buildmode=pie -trimpath -mod=readonly -modcacherw";
GOLDFLAGS = "-s -w -X main.version=${version}";
CGO_ENABLED = 0;
# CGO_CFLAGS = "-g0 -mtune=native";
# CGO_LDFLAGS = "-Wl,-O1,-sort-common,-as-needed,-z,relro,-z,now,-flto -pthread";
GOPROXY = "direct";
shellHook = ''
echo " -- in ${projname} dev shell..."
'';
nativeBuildInputs = [
];
packages =
[
# use pathed go, as it's (supposed to be) faster with cgo,
# which will inevitably encountered anyway.
go_1_19
go-tools
gopls
gofumpt
statix
alejandra
## ad-hoc cmds
gob
gota
gogen
upcache
add-license
]
++ (
if stdenv.isLinux
then [
]
else []
);
};
}
);
};
}