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shrub/nix/sources.nix
Brendan Hay ce3cbf0857
build: rework all nix expressions to support hercules-ci builds
This also removes nixcrpkgs and OSX cross compilation in favour of
compiling on the target. x86_64/musl targets are still supported
on Linux.

All sources are now managed via niv (see nix/sources.json) and Haskell
package sets are provided/organised via IOHK's haskell.nix.

Some effort has been made to expose similar top-level attributes for
development, but in some cases there have been changes. Please see
the comments in the top-level default.nix and ci.nix files for usage.
2020-10-27 13:55:49 +01:00

155 lines
5.0 KiB
Nix

# This file has been generated by Niv.
let
#
# The fetchers. fetch_<type> fetches specs of type <type>.
#
fetch_file = pkgs: spec:
if spec.builtin or true then
builtins_fetchurl { inherit (spec) url sha256; }
else
pkgs.fetchurl { inherit (spec) url sha256; };
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) "${name}-src";
in if spec.builtin or true then
builtins_fetchTarball {
name = name';
inherit (spec) url sha256;
}
else
pkgs.fetchzip {
name = name';
inherit (spec) url sha256;
};
fetch_git = spec:
builtins.fetchGit {
url = spec.repo;
inherit (spec) rev ref;
};
fetch_local = spec: spec.path;
fetch_builtin-tarball = name:
throw ''
[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`.
$ niv modify ${name} -a type=tarball -a builtin=true'';
fetch_builtin-url = name:
throw ''
[${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'';
#
# Various helpers
#
# 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.
'';
# The actual fetching function.
fetch = pkgs: name: spec:
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 ${builtins.toJSON spec.type}";
# Ports of functions for older nix versions
# a Nix version of mapAttrs if the built-in doesn't exist
mapAttrs = builtins.mapAttrs or (f: set:
with builtins;
listToAttrs (map (attr: {
name = attr;
value = f attr set.${attr};
}) (attrNames set)));
# 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);
# 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));
# https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
concatStrings = builtins.concatStringsSep "";
# 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;
# 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;
# 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;
# 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;
# The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
inherit pkgs;
};
in mkSources (mkConfig { }) // {
__functor = _: settings: mkSources (mkConfig settings);
}