{ stdenv, name, preHook ? null, postHook ? null, initialPath, gcc, shell
, param1 ? "", param2 ? "", param3 ? "", param4 ? "", param5 ? ""
, extraAttrs ? {}
}:
let {
stdenvGenerator = setupScript: rec {
# The stdenv that we are producing.
result =
stdenv.mkDerivation {
inherit name;
builder = ./builder.sh;
setup = setupScript;
inherit preHook postHook initialPath gcc shell;
# TODO: make this more elegant.
inherit param1 param2 param3 param4 param5;
}
// {
# Add a utility function to produce derivations that use this
# stdenv and its shell.
mkDerivation = attrs:
(derivation (
(removeAttrs attrs ["meta" "passthru"])
//
{
builder = if attrs ? realBuilder then attrs.realBuilder else shell;
args = if attrs ? args then attrs.args else
["-e" (if attrs ? builder then attrs.builder else ./default-builder.sh)];
stdenv = result;
system = result.system;
})
)
# 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 = if attrs ? meta then attrs.meta else {}; }
# Pass through extra attributes that are not inputs, but
# should be made available to Nix expressions using the
# derivation (e.g., in assertions).
//
(if attrs ? passthru then attrs.passthru else {});
# Utility value: is this a Darwin system?
isDarwin = result.system == "i686-darwin" || result.system == "powerpc-darwin";
isLinux = result.system == "i686-linux"
|| result.system == "x86_64-linux"
|| result.system == "powerpc-linux";
# Utility function: allow stdenv to be easily regenerated with
# a different setup script. (See all-packages.nix for an
# example.)
regenerate = stdenvGenerator;
}
# 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;
body = stdenvGenerator ./setup.sh;
}