diff options
Diffstat (limited to 'lib/trivial.nix')
| -rw-r--r-- | lib/trivial.nix | 40 |
1 files changed, 1 insertions, 39 deletions
diff --git a/lib/trivial.nix b/lib/trivial.nix index f1001ee10ca3..b1eea0bf1247 100644 --- a/lib/trivial.nix +++ b/lib/trivial.nix @@ -171,7 +171,7 @@ rec { builtins.fromJSON (builtins.readFile path); - ## Warnings and asserts + ## Warnings /* 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 @@ -188,44 +188,6 @@ rec { warn = msg: builtins.trace "WARNING: ${msg}"; info = msg: builtins.trace "INFO: ${msg}"; - /* Print a trace message if pred is false. - Intended to be used to augment asserts with helpful error messages. - - Example: - assertMsg false "nope" - => false - stderr> trace: nope - - assert (assertMsg ("foo" == "bar") "foo is not bar, silly"); "" - stderr> trace: foo is not bar, silly - stderr> assert failed at … - - Type: - assertMsg :: Bool -> String -> Bool - */ - # TODO(Profpatsch): add tests that check stderr - assertMsg = pred: msg: - if pred - then true - else builtins.trace msg false; - - /* Specialized `assertMsg` for checking if val is one of the elements - of a list. Useful for checking enums. - - Example: - let sslLibrary = "libressl" - in assertOneOf "sslLibrary" sslLibrary [ "openssl" "bearssl" ] - => false - stderr> trace: sslLibrary must be one of "openssl", "bearssl", but is: "libressl" - - Type: - assertOneOf :: String -> ComparableVal -> List ComparableVal -> Bool - */ - assertOneOf = name: val: xs: assertMsg - (lib.elem val xs) - "${name} must be one of ${ - lib.generators.toPretty {} xs}, but is: ${ - lib.generators.toPretty {} val}"; ## Function annotations |