mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-29 00:53:57 +00:00
61 lines
2.5 KiB
Nix
61 lines
2.5 KiB
Nix
# Given a list of path-like strings, check some properties of the path library
|
|
# using those paths and return a list of attribute sets of the following form:
|
|
#
|
|
# { <string> = <lib.path.subpath.normalise string>; }
|
|
#
|
|
# If `normalise` fails to evaluate, the attribute value is set to `""`.
|
|
# If not, the resulting value is normalised again and an appropriate attribute set added to the output list.
|
|
{
|
|
# The path to the nixpkgs lib to use
|
|
libpath,
|
|
# A flat directory containing files with randomly-generated
|
|
# path-like values
|
|
dir,
|
|
}:
|
|
let
|
|
lib = import libpath;
|
|
|
|
# read each file into a string
|
|
strings = map (name:
|
|
builtins.readFile (dir + "/${name}")
|
|
) (builtins.attrNames (builtins.readDir dir));
|
|
|
|
inherit (lib.path.subpath) normalise isValid;
|
|
inherit (lib.asserts) assertMsg;
|
|
|
|
normaliseAndCheck = str:
|
|
let
|
|
originalValid = isValid str;
|
|
|
|
tryOnce = builtins.tryEval (normalise str);
|
|
tryTwice = builtins.tryEval (normalise tryOnce.value);
|
|
|
|
absConcatOrig = /. + ("/" + str);
|
|
absConcatNormalised = /. + ("/" + tryOnce.value);
|
|
in
|
|
# Check the lib.path.subpath.normalise property to only error on invalid subpaths
|
|
assert assertMsg
|
|
(originalValid -> tryOnce.success)
|
|
"Even though string \"${str}\" is valid as a subpath, the normalisation for it failed";
|
|
assert assertMsg
|
|
(! originalValid -> ! tryOnce.success)
|
|
"Even though string \"${str}\" is invalid as a subpath, the normalisation for it succeeded";
|
|
|
|
# Check normalisation idempotency
|
|
assert assertMsg
|
|
(originalValid -> tryTwice.success)
|
|
"For valid subpath \"${str}\", the normalisation \"${tryOnce.value}\" was not a valid subpath";
|
|
assert assertMsg
|
|
(originalValid -> tryOnce.value == tryTwice.value)
|
|
"For valid subpath \"${str}\", normalising it once gives \"${tryOnce.value}\" but normalising it twice gives a different result: \"${tryTwice.value}\"";
|
|
|
|
# Check that normalisation doesn't change a string when appended to an absolute Nix path value
|
|
assert assertMsg
|
|
(originalValid -> absConcatOrig == absConcatNormalised)
|
|
"For valid subpath \"${str}\", appending to an absolute Nix path value gives \"${absConcatOrig}\", but appending the normalised result \"${tryOnce.value}\" gives a different value \"${absConcatNormalised}\"";
|
|
|
|
# Return an empty string when failed
|
|
if tryOnce.success then tryOnce.value else "";
|
|
|
|
in lib.genAttrs strings normaliseAndCheck
|