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use nix |
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{ | ||
"niv": { | ||
"branch": "master", | ||
"description": "Easy dependency management for Nix projects", | ||
"homepage": "https://github.com/nmattia/niv", | ||
"owner": "nmattia", | ||
"repo": "niv", | ||
"rev": "e82eb322ea32a747a51c431d7787221bcc6d9038", | ||
"sha256": "1fy4dcr05d80diwlxmh42xnjm5ki1pkbky38smvlqjaky2y2f71f", | ||
"type": "tarball", | ||
"url": "https://github.com/nmattia/niv/archive/e82eb322ea32a747a51c431d7787221bcc6d9038.tar.gz", | ||
"url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz" | ||
}, | ||
"nixpkgs": { | ||
"branch": "release-20.03", | ||
"description": "Nix Packages collection", | ||
"homepage": null, | ||
"owner": "NixOS", | ||
"repo": "nixpkgs", | ||
"rev": "05195accdc596c6c9eadfa7d283d7b780f87f96f", | ||
"sha256": "19yd3v8p6gb64gawzqkfq840gzwvq3jylfz56gy33qsm2awcfn8g", | ||
"type": "tarball", | ||
"url": "https://github.com/NixOS/nixpkgs/archive/05195accdc596c6c9eadfa7d283d7b780f87f96f.tar.gz", | ||
"url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz" | ||
} | ||
} |
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# This file has been generated by Niv. | ||
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let | ||
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# | ||
# The fetchers. fetch_<type> fetches specs of type <type>. | ||
# | ||
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fetch_file = pkgs: spec: | ||
if spec.builtin or true then | ||
builtins_fetchurl { inherit (spec) url sha256; } | ||
else | ||
pkgs.fetchurl { inherit (spec) url sha256; }; | ||
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fetch_tarball = pkgs: name: spec: | ||
let | ||
ok = str: ! builtins.isNull (builtins.match "[a-zA-Z0-9+-._?=]" str); | ||
# sanitize the name, though nix will still fail if name starts with period | ||
name' = stringAsChars (x: if ! ok x then "-" else x) "${name}-src"; | ||
in | ||
if spec.builtin or true then | ||
builtins_fetchTarball { name = name'; inherit (spec) url sha256; } | ||
else | ||
pkgs.fetchzip { name = name'; inherit (spec) url sha256; }; | ||
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fetch_git = spec: | ||
builtins.fetchGit { url = spec.repo; inherit (spec) rev ref; }; | ||
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fetch_local = spec: spec.path; | ||
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fetch_builtin-tarball = name: throw | ||
''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`. | ||
$ niv modify ${name} -a type=tarball -a builtin=true''; | ||
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fetch_builtin-url = name: throw | ||
''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`. | ||
$ niv modify ${name} -a type=file -a builtin=true''; | ||
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# | ||
# Various helpers | ||
# | ||
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# The set of packages used when specs are fetched using non-builtins. | ||
mkPkgs = sources: | ||
let | ||
sourcesNixpkgs = | ||
import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) {}; | ||
hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath; | ||
hasThisAsNixpkgsPath = <nixpkgs> == ./.; | ||
in | ||
if builtins.hasAttr "nixpkgs" sources | ||
then sourcesNixpkgs | ||
else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then | ||
import <nixpkgs> {} | ||
else | ||
abort | ||
'' | ||
Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or | ||
add a package called "nixpkgs" to your sources.json. | ||
''; | ||
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# The actual fetching function. | ||
fetch = pkgs: name: spec: | ||
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if ! builtins.hasAttr "type" spec then | ||
abort "ERROR: niv spec ${name} does not have a 'type' attribute" | ||
else if spec.type == "file" then fetch_file pkgs spec | ||
else if spec.type == "tarball" then fetch_tarball pkgs name spec | ||
else if spec.type == "git" then fetch_git spec | ||
else if spec.type == "local" then fetch_local spec | ||
else if spec.type == "builtin-tarball" then fetch_builtin-tarball name | ||
else if spec.type == "builtin-url" then fetch_builtin-url name | ||
else | ||
abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}"; | ||
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# Ports of functions for older nix versions | ||
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# a Nix version of mapAttrs if the built-in doesn't exist | ||
mapAttrs = builtins.mapAttrs or ( | ||
f: set: with builtins; | ||
listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set)) | ||
); | ||
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# https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295 | ||
range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1); | ||
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# https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257 | ||
stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1)); | ||
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# https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269 | ||
stringAsChars = f: s: concatStrings (map f (stringToCharacters s)); | ||
concatStrings = builtins.concatStringsSep ""; | ||
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# fetchTarball version that is compatible between all the versions of Nix | ||
builtins_fetchTarball = { url, name, sha256 }@attrs: | ||
let | ||
inherit (builtins) lessThan nixVersion fetchTarball; | ||
in | ||
if lessThan nixVersion "1.12" then | ||
fetchTarball { inherit name url; } | ||
else | ||
fetchTarball attrs; | ||
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# fetchurl version that is compatible between all the versions of Nix | ||
builtins_fetchurl = { url, sha256 }@attrs: | ||
let | ||
inherit (builtins) lessThan nixVersion fetchurl; | ||
in | ||
if lessThan nixVersion "1.12" then | ||
fetchurl { inherit url; } | ||
else | ||
fetchurl attrs; | ||
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# Create the final "sources" from the config | ||
mkSources = config: | ||
mapAttrs ( | ||
name: spec: | ||
if builtins.hasAttr "outPath" spec | ||
then abort | ||
"The values in sources.json should not have an 'outPath' attribute" | ||
else | ||
spec // { outPath = fetch config.pkgs name spec; } | ||
) config.sources; | ||
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# The "config" used by the fetchers | ||
mkConfig = | ||
{ sourcesFile ? ./sources.json | ||
, sources ? builtins.fromJSON (builtins.readFile sourcesFile) | ||
, pkgs ? mkPkgs sources | ||
}: rec { | ||
# The sources, i.e. the attribute set of spec name to spec | ||
inherit sources; | ||
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# The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers | ||
inherit pkgs; | ||
}; | ||
in | ||
mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); } |
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{ ... }: | ||
let | ||
sources = import ./nix/sources.nix; | ||
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nixpkgs = import sources.nixpkgs { }; | ||
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niv = import sources.niv { }; | ||
in with nixpkgs; | ||
stdenv.mkDerivation { | ||
name = "elo-anything"; | ||
buildInputs = [ | ||
niv.niv | ||
git | ||
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# Elm | ||
elmPackages.elm | ||
elmPackages.elm-format | ||
elmPackages.elm-test | ||
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# Build Stuff | ||
modd | ||
devd | ||
]; | ||
} |