29613e7494
Change-Id: I6a087279b5d819db475f2179cb77c0f55cbd0ac6 Reviewed-on: https://cl.tvl.fyi/c/depot/+/1860 Tested-by: BuildkiteCI Reviewed-by: glittershark <grfn@gws.fyi> Reviewed-by: lukegb <lukegb@tvl.fyi>
80 lines
2.2 KiB
Nix
80 lines
2.2 KiB
Nix
{ ... }:
|
|
|
|
args: initPath:
|
|
|
|
let
|
|
inherit (builtins)
|
|
attrNames
|
|
baseNameOf
|
|
concatStringsSep
|
|
filter
|
|
hasAttr
|
|
head
|
|
isAttrs
|
|
length
|
|
listToAttrs
|
|
map
|
|
match
|
|
readDir
|
|
substring;
|
|
|
|
argsWithPath = parts:
|
|
let meta.locatedAt = parts;
|
|
in meta // (if isAttrs args then args else args meta);
|
|
|
|
readDirVisible = path:
|
|
let
|
|
children = readDir path;
|
|
isVisible = f: f == ".skip-subtree" || (substring 0 1 f) != ".";
|
|
names = filter isVisible (attrNames children);
|
|
in listToAttrs (map (name: {
|
|
inherit name;
|
|
value = children.${name};
|
|
}) names);
|
|
|
|
# Create a mark containing the location of this attribute.
|
|
marker = parts: {
|
|
__readTree = parts;
|
|
};
|
|
|
|
# The marker is added to every set that was imported directly by
|
|
# readTree.
|
|
importWithMark = path: parts:
|
|
let imported = import path (argsWithPath parts);
|
|
in if (isAttrs imported)
|
|
then imported // (marker parts)
|
|
else imported;
|
|
|
|
nixFileName = file:
|
|
let res = match "(.*)\.nix" file;
|
|
in if res == null then null else head res;
|
|
|
|
readTree = path: parts:
|
|
let
|
|
dir = readDirVisible path;
|
|
self = importWithMark path parts;
|
|
joinChild = c: path + ("/" + c);
|
|
|
|
# Import subdirectories of the current one, unless the special
|
|
# `.skip-subtree` file exists which makes readTree ignore the
|
|
# children.
|
|
#
|
|
# This file can optionally contain information on why the tree
|
|
# should be ignored, but its content is not inspected by
|
|
# readTree
|
|
filterDir = f: dir."${f}" == "directory";
|
|
children = if hasAttr ".skip-subtree" dir then [] else map (c: {
|
|
name = c;
|
|
value = readTree (joinChild c) (parts ++ [ c ]);
|
|
}) (filter filterDir (attrNames dir));
|
|
|
|
# Import Nix files
|
|
nixFiles = filter (f: f != null) (map nixFileName (attrNames dir));
|
|
nixChildren = map (c: let p = joinChild (c + ".nix"); in {
|
|
name = c;
|
|
value = importWithMark p (parts ++ [ c ]);
|
|
}) nixFiles;
|
|
in if dir ? "default.nix"
|
|
then (if isAttrs self then self // (listToAttrs children) else self)
|
|
else (listToAttrs (nixChildren ++ children) // (marker parts));
|
|
in readTree initPath [ (baseNameOf initPath) ]
|