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Throw an error if NIXPKGS_OVERLAYS is invalid and improve documentation.

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This commit is contained in:
Nicolas B. Pierron 2016-12-26 19:26:24 +00:00 committed by Nicolas B. Pierron
parent 6a83c315ec
commit f9da1fa957
2 changed files with 5 additions and 3 deletions
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4
doc/overlays.xml
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@ -13,8 +13,8 @@ to bind the dependencies of all packages.</para>
<section xml:id="sec-overlays-install">
<title>Installing Overlays</title>
<para>Overlays are looked for in the following order, the first valid one is
considered, and all the rest are ignored:
<para>The set of overlays are looked for in the following order, only the
first one present is considered, and all the rest are ignored:
<orderedlist>

2
pkgs/top-level/impure.nix
View File

@ -31,7 +31,9 @@
let content = readDir dir; in
map (n: import "${dir}/${n}") (sort lessThan (attrNames content));
in
if dirEnv != "" then
if dirCheck dirEnv then overlays dirEnv
else throw "The environment variable NIXPKGS_OVERLAYS does not name a valid directory."
else if dirCheck dirHome then overlays dirHome
else []