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lib.{warn, info}: add simple helpers

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See also https://github.com/NixOS/nix/issues/749.
This commit is contained in:
Dan Peebles 2016-08-15 13:54:23 -04:00
parent ef15f01a43
commit 4dfdb27e00
1 changed files with 15 additions and 0 deletions
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15
lib/trivial.nix
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@ -98,4 +98,19 @@ rec {
*/
importJSON = path:
builtins.fromJSON (builtins.readFile path);
/* See https://github.com/NixOS/nix/issues/749. Eventually we'd like these
to expand to Nix builtins that carry metadata so that Nix can filter out
the INFO messages without parsing the message string.
Usage:
{
foo = lib.warn "foo is deprecated" oldFoo;
}
TODO: figure out a clever way to integrate location information from
something like __unsafeGetAttrPos.
*/
warn = msg: builtins.trace "WARNING: ${msg}";
info = msg: builtins.trace "INFO: ${msg}";
}