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lib.warn: Use or behave like builtins.warn

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This commit is contained in:
Robert Hensing 2024-04-24 11:10:29 +02:00
parent 76e6d8b1a8
commit f7250f372a
1 changed files with 15 additions and 3 deletions
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18
lib/trivial.nix
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@ -12,6 +12,9 @@ let
version
versionSuffix
warn;
inherit (lib)
isString
;
in {
## Simple (higher order) functions
@ -698,9 +701,18 @@ in {
```
*/
warn =
if lib.elem (builtins.getEnv "NIX_ABORT_ON_WARN") ["1" "true" "yes"]
then msg: builtins.trace "warning: ${msg}" (abort "NIX_ABORT_ON_WARN=true; warnings are treated as unrecoverable errors.")
else msg: builtins.trace "warning: ${msg}";
# Since https://github.com/NixOS/nix/pull/10592
builtins.warn or (
let mustAbort = lib.elem (builtins.getEnv "NIX_ABORT_ON_WARN") ["1" "true" "yes"];
in
# Do not eta reduce v, so that we have the same strictness as `builtins.warn`.
msg: v:
# `builtins.warn` requires a string message, so we enforce that in our implementation, so that callers aren't accidentally incompatible with newer Nix versions.
assert isString msg;
if mustAbort
then builtins.trace "warning: ${msg}" (abort "NIX_ABORT_ON_WARN=true; warnings are treated as unrecoverable errors.")
else builtins.trace "warning: ${msg}" v
);
/**
Like warn, but only warn when the first argument is `true`.