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lix/tests/lang/eval-okay-versions.nix
Eelco Dolstra d567baabbd * Export the nix-env derivation name parsing and version comparison
logic through the `parseDrvName' and `compareVersions' primops.
  This will allow expressions to easily check whether some dependency
  is a specific needed version or falls in some version range.  See
  tests/lang/eval-okay-versions.nix for examples.
2008-07-01 10:10:32 +00:00

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Nix

let
name1 = "hello-1.0.2";
name2 = "hello";
name3 = "915resolution-0.5.2";
name4 = "xf86-video-i810-1.7.4";
eq = 0;
lt = builtins.sub 0 1;
gt = 1;
versionTest = v1: v2: expected:
let d1 = builtins.compareVersions v1 v2;
d2 = builtins.compareVersions v2 v1;
in d1 == builtins.sub 0 d2 && d1 == expected;
tests = [
((builtins.parseDrvName name1).name == "hello")
((builtins.parseDrvName name1).version == "1.0.2")
((builtins.parseDrvName name2).name == "hello")
((builtins.parseDrvName name2).version == "")
((builtins.parseDrvName name3).name == "915resolution")
((builtins.parseDrvName name3).version == "0.5.2")
((builtins.parseDrvName name4).name == "xf86-video-i810")
((builtins.parseDrvName name4).version == "1.7.4")
(versionTest "1.0" "2.3" lt)
(versionTest "2.1" "2.3" lt)
(versionTest "2.3" "2.3" eq)
(versionTest "2.5" "2.3" gt)
(versionTest "3.1" "2.3" gt)
(versionTest "2.3.1" "2.3" gt)
(versionTest "2.3.1" "2.3a" gt)
(versionTest "2.3pre1" "2.3" lt)
(versionTest "2.3pre3" "2.3pre12" lt)
(versionTest "2.3a" "2.3c" lt)
(versionTest "2.3pre1" "2.3c" lt)
(versionTest "2.3pre1" "2.3q" lt)
];
in (import ./lib.nix).and tests