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|
# Check that overriding works for trivial-builders like
# `writeShellScript` via `overrideAttrs`. This is useful
# to override the `checkPhase`, e. g. if you want
# to disable extglob in `writeShellScript`.
#
# Run using `nix-build -A tests.trivial-builders.overriding`.
{
lib,
stdenv,
runtimeShell,
runCommand,
callPackage,
writeShellScript,
writeTextFile,
writeShellScriptBin,
}:
let
extglobScript = ''
shopt -s extglob
touch success
echo @(success|failure)
rm success
'';
simpleCase = case: writeShellScript "test-trivial-overriding-${case}" extglobScript;
callPackageCase =
case:
callPackage (
{ writeShellScript }: writeShellScript "test-trivial-callpackage-overriding-${case}" extglobScript
) { };
binCase = case: writeShellScriptBin "test-trivial-overriding-bin-${case}" extglobScript;
# building this derivation would fail without overriding
textFileCase = writeTextFile {
name = "test-trivial-overriding-text-file";
checkPhase = "false";
text = ''
#!${runtimeShell}
echo success
'';
executable = true;
};
disallowExtglob =
x:
x.overrideAttrs (_: {
checkPhase = ''
${stdenv.shell} -n "$target"
'';
});
# Run old checkPhase, but only succeed if it fails.
# This HACK is required because we can't introspect build failures
# in nix: With `assertFail` we want to make sure that the default
# `checkPhase` would fail if extglob was used in the script.
assertFail =
x:
x.overrideAttrs (old: {
checkPhase = ''
if
${old.checkPhase}
then exit 1; fi
'';
});
mkCase =
case: outcome: isBin:
let
drv = lib.pipe outcome (
[ case ]
++ lib.optionals (outcome == "fail") [
disallowExtglob
assertFail
]
);
in
if isBin then "${drv}/bin/${drv.name}" else drv;
writeTextOverrides = {
# Make sure extglob works by default
simpleSucc = mkCase simpleCase "succ" false;
# Ensure it's possible to fail; in this case extglob is not enabled
simpleFail = mkCase simpleCase "fail" false;
# Do the same checks after wrapping with callPackage
# to make sure callPackage doesn't mess with the override
callpSucc = mkCase callPackageCase "succ" false;
callpFail = mkCase callPackageCase "fail" false;
# Do the same check using `writeShellScriptBin`
binSucc = mkCase binCase "succ" true;
binFail = mkCase binCase "fail" true;
# Check that we can also override plain writeTextFile
textFileSuccess = textFileCase.overrideAttrs (_: {
checkPhase = "true";
});
};
# `runTest` forces nix to build the script of our test case and
# run its `checkPhase` which is our main interest. Additionally
# it executes the script and thus makes sure that extglob also
# works at run time.
runTest =
script:
let
name = script.name or (baseNameOf script);
in
writeShellScript "run-${name}" ''
if [ "$(${script})" != "success" ]; then
echo "Failed in ${name}"
exit 1
fi
'';
in
runCommand "test-writeShellScript-overriding"
{
passthru = { inherit writeTextOverrides; };
}
''
${lib.concatMapStrings (test: ''
${runTest test}
'') (lib.attrValues writeTextOverrides)}
touch "$out"
''
|
