forked from mirrors/nixpkgs
47 lines
1.7 KiB
Nix
47 lines
1.7 KiB
Nix
{lib, pkgs} :
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let inherit (lib) nv nvs; in
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{
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# see new python derivations for example..
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# You should be able to override anything you like easily
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# grep the mailinglist by title "python proposal" (dec 08)
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# -> http://mail.cs.uu.nl/pipermail/nix-dev/2008-December/001571.html
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# to see why this got complicated when using all its features
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composableDerivation = {
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# modify args before applying stdenv.mkDerivation, this should remove at least attrs removeAttrsBy
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f ? lib.prepareDerivationArgs,
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stdenv ? pkgs.stdenv,
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# initial set of arguments to be passed to stdenv.mkDerivation passing prepareDerivationArgs by default
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initial ? {},
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# example func : (x: x // { x.buildInputs ++ ["foo"] }), but see mergeAttrByFunc which does this for you
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merge ? (lib.mergeOrApply lib.mergeAttrByFunc)
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}: lib.applyAndFun
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(args: stdenv.mkDerivation (f args))
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merge
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(merge { inherit (lib) mergeAttrBy; } initial);
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# some utility functions
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# use this function to generate flag attrs for prepareDerivationArgs
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# E nable D isable F eature
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edf = {name, feat ? name, enable ? {}, disable ? {} , value ? ""}:
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nvs name {
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set = {
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configureFlags = ["--enable-${feat}${if value == "" then "" else "="}${value}"];
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} // enable;
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unset = {
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configureFlags = ["--disable-${feat}"];
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} // disable;
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};
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# same for --with and --without-
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# W ith or W ithout F eature
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wwf = {name, feat ? name, enable ? {}, disable ? {}, value ? ""}:
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nvs name {
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set = {
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configureFlags = ["--with-${feat}${if value == "" then "" else "="}${value}"];
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} // enable;
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unset = {
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configureFlags = ["--without-${feat}"];
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} // disable;
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};
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}
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