nixos/fn.nix

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{ lib }:
with builtins;
with lib;
rec {
ifelse = a: b: c: if a then b else c;
fileContentsOr = a: b: (ifelse
(pathIsRegularFile a)
a b);
cwd = toString ./.;
# lst (string PATH) (string FILETYPE) (bool RETURNFULLPATH)
lst = { p ? cwd, t ? "regular", b ? false }: (lists.forEach
(attrNames
(filterAttrs (n: v: v == t)
(readDir p)))
(v: ((optionalString b "${p}/") + v)));
lsf = p: (lst { p = p; });
lsd = p: (lst { p = p; t = "directory"; b = true; });
lsfRec = p: b: flatten ((map (np: lsfRec np b) (lsd p)) ++ (lst { p = p; b = b; }));
hasAttrs = aList: d: (map
(a:
(ifelse (isList a)
(hasAttrByPath a d)
(hasAttr a d)))
aList);
deps = p: ifelse (isAttrs p) (filter (p: isAttrs p)
(p.buildInputs ++ p.nativeBuildInputs ++ p.propagatedBuildInputs ++ p.propagatedNativeBuildInputs)
) [];
importFilter = l: p: filter (n: elem (nameFromURL (toString n) ".") l) p;
depsRec = ld: ifelse (ld == []) [] ((toList ld) ++ (depsRec (lists.unique (lists.flatten (map (d: deps d) (toList ld))))));
isBroken = p: ifelse ((elem true (hasAttrs [["meta" "broken"]] p)) && (p.meta.broken == true))
(warn "Package ${p.name} is marked as broken." true)
false;
depsBroken = p: lists.any (p: (isBroken p)) (deps p);
# Those two lines are quite magical 🧙
depsBrokenRec = p: (b: b == true) (ifelse (depsBroken p) true
(map (p: depsBrokenRec p) (deps p)));
pkgFilter = ld: (filter
(p: (
ifelse (isBroken p)
false
(ifelse (depsBrokenRec p)
(warn "Dependency of ${p.name} is marked as broken." false)
true)
))
ld);
}