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use nix | ||
dotenv | ||
dotenv_if_exists .env.local |
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{ pkgs ? import ./pkgs.nix {} }: | ||
rec { | ||
ghc = pkgs.haskell.compiler.${compiler}; | ||
compiler = "ghc${ghcVersion}"; | ||
ghcVersion = "902"; | ||
} |
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let | ||
sources = import ./sources.nix; | ||
in | ||
import sources.nixpkgs |
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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": "82e5cd1ad3c387863f0545d7591512e76ab0fc41", | ||
"sha256": "090l219mzc0gi33i3psgph6s2pwsc8qy4lyrqjdj4qzkvmaj65a7", | ||
"type": "tarball", | ||
"url": "https://github.com/nmattia/niv/archive/82e5cd1ad3c387863f0545d7591512e76ab0fc41.tar.gz", | ||
"url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz" | ||
}, | ||
"nixpkgs": { | ||
"branch": "release-22.11", | ||
"description": "Nix Packages collection", | ||
"homepage": "", | ||
"owner": "NixOS", | ||
"repo": "nixpkgs", | ||
"rev": "e4ddb962be28423343a5c691bf8ebc774e18971b", | ||
"sha256": "0nm0m7mwnvq0v2npqhgy1lqcypg73r5zs8xif5yya4na2hvjagwz", | ||
"type": "tarball", | ||
"url": "https://github.com/NixOS/nixpkgs/archive/e4ddb962be28423343a5c691bf8ebc774e18971b.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: name: spec: | ||
let | ||
name' = sanitizeName name + "-src"; | ||
in | ||
if spec.builtin or true then | ||
builtins_fetchurl { inherit (spec) url sha256; name = name'; } | ||
else | ||
pkgs.fetchurl { inherit (spec) url sha256; name = name'; }; | ||
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fetch_tarball = pkgs: name: spec: | ||
let | ||
name' = sanitizeName 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 = name: spec: | ||
let | ||
ref = | ||
if spec ? ref then spec.ref else | ||
if spec ? branch then "refs/heads/${spec.branch}" else | ||
if spec ? tag then "refs/tags/${spec.tag}" else | ||
abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!"; | ||
submodules = if spec ? submodules then spec.submodules else false; | ||
submoduleArg = | ||
let | ||
nixSupportsSubmodules = builtins.compareVersions builtins.nixVersion "2.4" >= 0; | ||
emptyArgWithWarning = | ||
if submodules == true | ||
then | ||
builtins.trace | ||
( | ||
"The niv input \"${name}\" uses submodules " | ||
+ "but your nix's (${builtins.nixVersion}) builtins.fetchGit " | ||
+ "does not support them" | ||
) | ||
{} | ||
else {}; | ||
in | ||
if nixSupportsSubmodules | ||
then { inherit submodules; } | ||
else emptyArgWithWarning; | ||
in | ||
builtins.fetchGit | ||
({ url = spec.repo; inherit (spec) rev; inherit ref; } // submoduleArg); | ||
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fetch_local = spec: spec.path; | ||
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fetch_builtin-tarball = name: throw | ||
''[${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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# https://github.com/NixOS/nixpkgs/pull/83241/files#diff-c6f540a4f3bfa4b0e8b6bafd4cd54e8bR695 | ||
sanitizeName = name: | ||
( | ||
concatMapStrings (s: if builtins.isList s then "-" else s) | ||
( | ||
builtins.split "[^[:alnum:]+._?=-]+" | ||
((x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0) name) | ||
) | ||
); | ||
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# The set of packages used when specs are fetched using non-builtins. | ||
mkPkgs = sources: system: | ||
let | ||
sourcesNixpkgs = | ||
import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { inherit system; }; | ||
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 name spec | ||
else if spec.type == "tarball" then fetch_tarball pkgs name spec | ||
else if spec.type == "git" then fetch_git name 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 ${builtins.toJSON spec.type}"; | ||
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# If the environment variable NIV_OVERRIDE_${name} is set, then use | ||
# the path directly as opposed to the fetched source. | ||
replace = name: drv: | ||
let | ||
saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name; | ||
ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}"; | ||
in | ||
if ersatz == "" then drv else | ||
# this turns the string into an actual Nix path (for both absolute and | ||
# relative paths) | ||
if builtins.substring 0 1 ersatz == "/" then /. + ersatz else /. + builtins.getEnv "PWD" + "/${ersatz}"; | ||
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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)); | ||
concatMapStrings = f: list: concatStrings (map f list); | ||
concatStrings = builtins.concatStringsSep ""; | ||
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# https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331 | ||
optionalAttrs = cond: as: if cond then as else {}; | ||
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# fetchTarball version that is compatible between all the versions of Nix | ||
builtins_fetchTarball = { url, name ? null, sha256 }@attrs: | ||
let | ||
inherit (builtins) lessThan nixVersion fetchTarball; | ||
in | ||
if lessThan nixVersion "1.12" then | ||
fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; })) | ||
else | ||
fetchTarball attrs; | ||
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# fetchurl version that is compatible between all the versions of Nix | ||
builtins_fetchurl = { url, name ? null, sha256 }@attrs: | ||
let | ||
inherit (builtins) lessThan nixVersion fetchurl; | ||
in | ||
if lessThan nixVersion "1.12" then | ||
fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; })) | ||
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 = replace name (fetch config.pkgs name spec); } | ||
) config.sources; | ||
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# The "config" used by the fetchers | ||
mkConfig = | ||
{ sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null | ||
, sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile) | ||
, system ? builtins.currentSystem | ||
, pkgs ? mkPkgs sources system | ||
}: 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; | ||
}; | ||
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in | ||
mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); } |