lib/trivial: add a few examples of usage of assertMsg/assertOneOf

Changed files
+20 -10
lib
pkgs
applications
misc
lilyterm
science
math
ripser
+5 -2
lib/lists.nix
···
=> 3
*/
last = list:
-
assert list != []; elemAt list (length list - 1);
+
assert assertMsg (list != []) "lists.last: list must not be empty!";
+
elemAt list (length list - 1);
/* Return all elements but the last
···
init [ 1 2 3 ]
=> [ 1 2 ]
*/
-
init = list: assert list != []; take (length list - 1) list;
+
init = list:
+
assert assertMsg (list != []) "lists.init: list must not be empty!";
+
take (length list - 1) list;
/* return the image of the cross product of some lists by a function
+5 -2
lib/strings.nix
···
components = splitString "/" url;
filename = lib.last components;
name = builtins.head (splitString sep filename);
-
in assert name != filename; name;
+
in assert name != filename; name;
/* Create an --{enable,disable}-<feat> string that can be passed to
standard GNU Autoconf scripts.
···
strw = lib.stringLength str;
reqWidth = width - (lib.stringLength filler);
in
-
assert strw <= width;
+
assert lib.assertMsg (strw <= width)
+
"fixedWidthString: requested string length (${
+
toString width}) must not be shorter than actual length (${
+
toString strw})";
if strw == width then str else filler + fixedWidthString reqWidth filler str;
/* Format a number adding leading zeroes up to fixed width.
+6 -2
lib/types.nix
···
let
betweenDesc = lowest: highest:
"${toString lowest} and ${toString highest} (both inclusive)";
-
between = lowest: highest: assert lowest <= highest;
+
between = lowest: highest:
+
assert lib.assertMsg (lowest <= highest)
+
"ints.between: lowest must be smaller than highest";
addCheck int (x: x >= lowest && x <= highest) // {
name = "intBetween";
description = "integer between ${betweenDesc lowest highest}";
···
# Either value of type `finalType` or `coercedType`, the latter is
# converted to `finalType` using `coerceFunc`.
coercedTo = coercedType: coerceFunc: finalType:
-
assert coercedType.getSubModules == null;
+
assert assertMsg (coercedType.getSubModules == null)
+
"coercedTo: coercedType must not have submodules (it’s a ${
+
coercedType.description})";
mkOptionType rec {
name = "coercedTo";
description = "${finalType.description} or ${coercedType.description} convertible to it";
+2 -3
pkgs/applications/misc/lilyterm/default.nix
···
-
{ stdenv, fetchurl, fetchFromGitHub
+
{ stdenv, lib, fetchurl, fetchFromGitHub
, pkgconfig
, autoconf, automake, intltool, gettext
, gtk, vte
-
# "stable" or "git"
, flavour ? "stable"
}:
-
assert flavour == "stable" || flavour == "git";
+
assert lib.assertOneOf "flavour" flavour [ "stable" "git" ];
let
stuff =
+2 -1
pkgs/applications/science/math/ripser/default.nix
···
with stdenv.lib;
-
assert elem fileFormat ["lowerTriangularCsv" "upperTriangularCsv" "dipha"];
+
assert assertOneOf "fileFormat" fileFormat
+
["lowerTriangularCsv" "upperTriangularCsv" "dipha"];
assert useGoogleHashmap -> sparsehash != null;
let