nixpkgs/pkgs/stdenv/generic/default.nix
Shea Levy 98860f429d Add the addPassthru library function
With multiple outputs, adding attributes to a derivation without
changing the {drv,out}Path is no longer as trivial as simply using the
`//' operator, as we usually want to add the attribute to _each_ output,
and even if we only care about one that one output can be reached via
multiple paths.

For stdenv.mkDerivation, we already had code in place to add passthru
and meta attributes to derivations. This commit simply factors part of
that code out into a lib function addPassthru, which takes a derivation
and an attribute set and appends the attribute set to each output of the
derivation.

Signed-off-by: Shea Levy <shea@shealevy.com>
2013-03-24 08:29:10 -04:00

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{ system, name ? "stdenv", preHook ? "", initialPath, gcc, shell
, extraAttrs ? {}, overrides ? (pkgs: {}), config
, # The `fetchurl' to use for downloading curl and its dependencies
# (see all-packages.nix).
fetchurlBoot
}:
if ! builtins ? langVersion then
abort "This version of Nixpkgs requires Nix >= 1.2, please upgrade!"
else
let
lib = import ../../lib;
allowUnfree = config.allowUnfree or true && builtins.getEnv "HYDRA_DISALLOW_UNFREE" != "1";
stdenvGenerator = setupScript: rec {
# The stdenv that we are producing.
result =
derivation {
inherit system name;
builder = shell;
args = ["-e" ./builder.sh];
setup = setupScript;
inherit preHook initialPath gcc shell;
propagatedUserEnvPkgs = [gcc] ++
lib.filter lib.isDerivation initialPath;
__ignoreNulls = true;
}
// rec {
meta = {
description = "The default build environment for Unix packages in Nixpkgs";
};
# Add a utility function to produce derivations that use this
# stdenv and its shell.
mkDerivation = attrs:
if !allowUnfree && (let l = attrs.meta.license or ""; in l == "unfree" || l == "unfree-redistributable" || l == lib.licenses.proprietary) then
throw "package ${attrs.name} has an unfree license, refusing to evaluate"
else
lib.addPassthru (derivation (
(removeAttrs attrs ["meta" "passthru" "crossAttrs"])
// (let
buildInputs = attrs.buildInputs or [];
nativeBuildInputs = attrs.nativeBuildInputs or [];
propagatedBuildInputs = attrs.propagatedBuildInputs or [];
propagatedNativeBuildInputs = attrs.propagatedNativeBuildInputs or [];
crossConfig = attrs.crossConfig or null;
in
{
builder = attrs.realBuilder or shell;
args = attrs.args or ["-e" (attrs.builder or ./default-builder.sh)];
stdenv = result;
system = result.system;
userHook = config.stdenv.userHook or null;
# Inputs built by the cross compiler.
buildInputs = lib.optionals (crossConfig != null) buildInputs;
propagatedBuildInputs = lib.optionals (crossConfig != null)
propagatedBuildInputs;
# Inputs built by the usual native compiler.
nativeBuildInputs = nativeBuildInputs ++ lib.optionals
(crossConfig == null) buildInputs;
propagatedNativeBuildInputs = propagatedNativeBuildInputs ++
lib.optionals (crossConfig == null) propagatedBuildInputs;
}))) (
{
# The meta attribute is passed in the resulting attribute set,
# but it's not part of the actual derivation, i.e., it's not
# passed to the builder and is not a dependency. But since we
# include it in the result, it *is* available to nix-env for
# queries.
meta = attrs.meta or {};
} //
# Pass through extra attributes that are not inputs, but
# should be made available to Nix expressions using the
# derivation (e.g., in assertions).
(attrs.passthru or {}));
# Utility flags to test the type of platform.
isDarwin = result.system == "x86_64-darwin";
isLinux = result.system == "i686-linux"
|| result.system == "x86_64-linux"
|| result.system == "powerpc-linux"
|| result.system == "armv5tel-linux"
|| result.system == "armv6l-linux"
|| result.system == "armv7l-linux"
|| result.system == "mips64el-linux";
isGNU = result.system == "i686-gnu"; # GNU/Hurd
isGlibc = isGNU # useful for `stdenvNative'
|| isLinux
|| result.system == "x86_64-kfreebsd-gnu";
isSunOS = result.system == "i686-solaris"
|| result.system == "x86_64-solaris";
isCygwin = result.system == "i686-cygwin";
isFreeBSD = result.system == "i686-freebsd"
|| result.system == "x86_64-freebsd";
isOpenBSD = result.system == "i686-openbsd"
|| result.system == "x86_64-openbsd";
isBSD = result.system == "i686-freebsd"
|| result.system == "x86_64-freebsd"
|| result.system == "i686-openbsd"
|| result.system == "x86_64-openbsd";
isi686 = result.system == "i686-linux"
|| result.system == "i686-gnu"
|| result.system == "i686-freebsd"
|| result.system == "i686-openbsd"
|| result.system == "i386-sunos";
isx86_64 = result.system == "x86_64-linux"
|| result.system == "x86_64-darwin"
|| result.system == "x86_64-freebsd"
|| result.system == "x86_64-openbsd";
is64bit = result.system == "x86_64-linux"
|| result.system == "x86_64-darwin"
|| result.system == "x86_64-freebsd"
|| result.system == "x86_64-openbsd";
isMips = result.system == "mips-linux"
|| result.system == "mips64el-linux";
isArm = result.system == "armv5tel-linux"
|| result.system == "armv6l-linux"
|| result.system == "armv7l-linux";
# Utility function: allow stdenv to be easily regenerated with
# a different setup script. (See all-packages.nix for an
# example.)
regenerate = stdenvGenerator;
# For convenience, bring in the library functions in lib/ so
# packages don't have to do that themselves.
inherit lib;
inherit fetchurlBoot;
inherit overrides;
}
# Propagate any extra attributes. For instance, we use this to
# "lift" packages like curl from the final stdenv for Linux to
# all-packages.nix for that platform (meaning that it has a line
# like curl = if stdenv ? curl then stdenv.curl else ...).
// extraAttrs;
}.result;
in stdenvGenerator ./setup.sh