cdfae7de48
The most trivial of all derivations. It is more useful than it looks. Can be used to bind nix expressions (e.g. test suites) to a derivation, so that `nix-build` does not crap itself. Change-Id: I61c24d8c129c9505733161207f3c30e820f5b15e Reviewed-on: https://cl.tvl.fyi/c/depot/+/665 Reviewed-by: tazjin <mail@tazj.in>
32 lines
742 B
Nix
32 lines
742 B
Nix
{ emptyDerivation, getBins, pkgs, writeExecline, runTestsuite, it, assertEq }:
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let
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bins = getBins pkgs.s6-portable-utils [ "s6-echo" ];
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empty = it "is just an empty path" [
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(assertEq "path empty"
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(builtins.readFile emptyDerivation)
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"")
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];
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fooOut = emptyDerivation {
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builder = writeExecline "foo-builder" {} [
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"importas" "out" "out"
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"redirfd" "-w" "1" "$out"
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bins.s6-echo "-n" "foo"
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];
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};
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overrideBuilder = it "can override the builder" [
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(assertEq "output is foo"
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(builtins.readFile fooOut)
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"foo")
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(assertEq "can add new drv variables"
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(emptyDerivation { foo = "bar"; }).foo
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"bar")
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];
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in runTestsuite "emptyDerivation" [
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empty
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overrideBuilder
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]
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