1014ca2ad5
set to the result, but don't use them in the actual derivation (so they're not inputs). Useful to pass through extra attributes that are not inputs, but should be made available to Nix expressions using the derivation (e.g., in assertions). svn path=/nixpkgs/trunk/; revision=6521
80 lines
2.5 KiB
Nix
80 lines
2.5 KiB
Nix
{ stdenv, name, preHook ? null, postHook ? null, initialPath, gcc, shell
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, param1 ? "", param2 ? "", param3 ? "", param4 ? "", param5 ? ""
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, extraAttrs ? {}
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}:
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let {
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stdenvGenerator = setupScript: rec {
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# The stdenv that we are producing.
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result =
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stdenv.mkDerivation {
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inherit name;
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builder = ./builder.sh;
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substitute = ../../build-support/substitute/substitute.sh;
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setup = setupScript;
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inherit preHook postHook initialPath gcc shell;
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# TODO: make this more elegant.
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inherit param1 param2 param3 param4 param5;
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}
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// {
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# Add a utility function to produce derivations that use this
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# stdenv and its shell.
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mkDerivation = attrs:
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(derivation (
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(removeAttrs attrs ["meta" "passthru"])
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//
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{
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builder = if attrs ? realBuilder then attrs.realBuilder else shell;
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args = if attrs ? args then attrs.args else
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["-e" (if attrs ? builder then attrs.builder else ./default-builder.sh)];
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stdenv = result;
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system = result.system;
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})
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)
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# The meta attribute is passed in the resulting attribute set,
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# but it's not part of the actual derivation, i.e., it's not
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# passed to the builder and is not a dependency. But since we
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# include it in the result, it *is* available to nix-env for
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# queries.
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//
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{ meta = if attrs ? meta then attrs.meta else {}; }
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# Pass through extra attributes that are not inputs, but
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# should be made available to Nix expressions using the
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# derivation (e.g., in assertions).
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//
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(if attrs ? passthru then attrs.passthru else {});
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# Utility value: is this a Darwin system?
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isDarwin = result.system == "i686-darwin" || result.system == "powerpc-darwin";
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isLinux = result.system == "i686-linux" || result.system == "powerpc-linux";
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# Utility function: allow stdenv to be easily regenerated with
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# a different setup script. (See all-packages.nix for an
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# example.)
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regenerate = stdenvGenerator;
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}
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# Propagate any extra attributes. For instance, we use this to
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# "lift" packages like curl from the final stdenv for Linux to
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# all-packages.nix for that platform (meaning that it has a line
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# like curl = if stdenv ? curl then stdenv.curl else ...).
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// extraAttrs;
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}.result;
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body = stdenvGenerator ./setup.sh;
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}
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