baec8f5b38
contains arbitrary information about a package, like this:
meta = {
homepage = "http://gcc.gnu.org/";
license = "GPL/LGPL";
description = "GNU Compiler Collection, 4.0.x";
};
The "meta" attribute is not passed to the actual derivation
operation, so it's not a dependency --- changes to "meta" attributes
don't trigger a recompilation.
Now we have to standardise some useful attributes ;-)
svn path=/nixpkgs/branches/usability/; revision=5024
57 lines
1.7 KiB
Nix
57 lines
1.7 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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body =
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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 = ./setup.sh;
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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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# Add a utility function to produce derivations that use this
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# stdenv and its shell.
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// {
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mkDerivation = attrs:
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(derivation (
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(removeAttrs attrs ["meta"])
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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 = body;
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system = body.system;
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})
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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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{ meta = if attrs ? meta then attrs.meta else {}; };
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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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}
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