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Previously, for types defined using typedef (like all primitive types)
type.checkType would return a boolean. This is largely fine since in
most places `type.checkToBool (type.checkType x)` or similar is used.
However, some functions actually take type.checkType up on the promise
that it returns a set of the form:
{
ok = <bool>;
err = <option string>;
}
This is the case for restrict which has checkToBool = v: v.ok; and will
generate a proper set except if `t.checkToBool (t.checkType v) == false`
in which case it will return t.checkType v. If t was a primitive type or
defined using typedef, previously `t.checkType v` would be a boolean
which meant as soon as (restrict …).checkToBool was called on a restrict
checkType result in cases where the wrapped type didn't match, an
unrelated error would be thrown:
nix-repl> with nix.yants; restrict "foo" (_: true) int "lol"
error: value is a boolean while a set was expected, at /home/lukas/src/depot/nix/yants/default.nix:38:39
This is fixed by making typedef return a proper set from checkType and
adjusting its checkToBool accordingly.
Unfortunately I don't think we can easily add test cases for this except
by using recursive nix or VM tests as there is no way to introspect
error messages.
Change-Id: I96a7be065630f04ca33358f21809284911ec14fe
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2536
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: Profpatsch <mail@profpatsch.de>
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By using an extremely trivial derivation we can ensure that it will not
throw if evaluated using deepSeq. When using stdenv.mkDerivation or
similar at some point something will most likely throw or generate some
kind of error which is alright in the context of nixpkgs, but makes
testing yants harder than you'd think it should be.
Change-Id: I61ff7dc01a00a4815ef39066e4e223123356ddd5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2507
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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Port existing tests to runTestsuite and add some obvious additional
tests that wouldn't be possible before (using assertThrows and
assertEq).
Change-Id: Ibe950a7a0cda3e23ebb226bdff35f52cdfec5ddf
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2479
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
Reviewed-by: tazjin <mail@tazj.in>
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`restrict` uses a predicate function to restrict a type, giving the
restricting a descriptive name in the process.
First, the wrapped type definition is checked (e.g. int) and then the
value is checked with the predicate, so the predicate can already
depend on the value being of the wrapped type.
Change-Id: Ic3edde45a8f34c31bc164414580d0a1aa5a821d5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2312
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
Reviewed-by: tazjin <mail@tazj.in>
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Has one less value than bool.
Change-Id: I2f2db07b1eb1f49172942bc1d8c6ceb30d987d84
Reviewed-on: https://cl.tvl.fyi/c/depot/+/661
Reviewed-by: tazjin <mail@tazj.in>
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This subtree split makes it possible for people to clone only
yants (similar to the kontemplate and journaldriver branches).
The subtree continues the history of the old git repository.
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The URLs served on the /about page are relative to the path's dirname,
which is tree/nix not tree/nix/yants.
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Required for readTree compatibility.
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Yants is being integrated at //depot/nix/yants
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