257 lines
9.8 KiB
Nix
257 lines
9.8 KiB
Nix
# Checks derivation meta and attrs for problems (like brokenness,
|
||
# licenses, etc).
|
||
|
||
{ lib, config, hostPlatform }:
|
||
|
||
let
|
||
# If we're in hydra, we can dispense with the more verbose error
|
||
# messages and make problems easier to spot.
|
||
inHydra = config.inHydra or false;
|
||
getName = attrs: attrs.name or ("${attrs.pname or "«name-missing»"}-${attrs.version or "«version-missing»"}");
|
||
|
||
# See discussion at https://github.com/NixOS/nixpkgs/pull/25304#issuecomment-298385426
|
||
# for why this defaults to false, but I (@copumpkin) want to default it to true soon.
|
||
shouldCheckMeta = config.checkMeta or false;
|
||
|
||
allowUnfree = config.allowUnfree or false
|
||
|| builtins.getEnv "NIXPKGS_ALLOW_UNFREE" == "1";
|
||
|
||
whitelist = config.whitelistedLicenses or [];
|
||
blacklist = config.blacklistedLicenses or [];
|
||
|
||
onlyLicenses = list:
|
||
lib.lists.all (license:
|
||
let l = lib.licenses.${license.shortName or "BROKEN"} or false; in
|
||
if license == l then true else
|
||
throw ''‘${showLicense license}’ is not an attribute of lib.licenses''
|
||
) list;
|
||
|
||
areLicenseListsValid =
|
||
if lib.mutuallyExclusive whitelist blacklist then
|
||
assert onlyLicenses whitelist; assert onlyLicenses blacklist; true
|
||
else
|
||
throw "whitelistedLicenses and blacklistedLicenses are not mutually exclusive.";
|
||
|
||
hasLicense = attrs:
|
||
attrs ? meta.license;
|
||
|
||
hasWhitelistedLicense = assert areLicenseListsValid; attrs:
|
||
hasLicense attrs && lib.lists.any (l: builtins.elem l whitelist) (lib.lists.toList attrs.meta.license);
|
||
|
||
hasBlacklistedLicense = assert areLicenseListsValid; attrs:
|
||
hasLicense attrs && lib.lists.any (l: builtins.elem l blacklist) (lib.lists.toList attrs.meta.license);
|
||
|
||
allowBroken = config.allowBroken or false
|
||
|| builtins.getEnv "NIXPKGS_ALLOW_BROKEN" == "1";
|
||
|
||
allowUnsupportedSystem = config.allowUnsupportedSystem or false
|
||
|| builtins.getEnv "NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM" == "1";
|
||
|
||
isUnfree = licenses: lib.lists.any (l: !l.free or true) licenses;
|
||
|
||
# Alow granular checks to allow only some unfree packages
|
||
# Example:
|
||
# {pkgs, ...}:
|
||
# {
|
||
# allowUnfree = false;
|
||
# allowUnfreePredicate = (x: pkgs.lib.hasPrefix "flashplayer-" x.name);
|
||
# }
|
||
allowUnfreePredicate = config.allowUnfreePredicate or (x: false);
|
||
|
||
# Check whether unfree packages are allowed and if not, whether the
|
||
# package has an unfree license and is not explicitely allowed by the
|
||
# `allowUnfreePredicate` function.
|
||
hasDeniedUnfreeLicense = attrs:
|
||
!allowUnfree &&
|
||
hasLicense attrs &&
|
||
isUnfree (lib.lists.toList attrs.meta.license) &&
|
||
!allowUnfreePredicate attrs;
|
||
|
||
allowInsecureDefaultPredicate = x: builtins.elem x.name (config.permittedInsecurePackages or []);
|
||
allowInsecurePredicate = x: (config.allowInsecurePredicate or allowInsecureDefaultPredicate) x;
|
||
|
||
hasAllowedInsecure = attrs:
|
||
(attrs.meta.knownVulnerabilities or []) == [] ||
|
||
allowInsecurePredicate attrs ||
|
||
builtins.getEnv "NIXPKGS_ALLOW_INSECURE" == "1";
|
||
|
||
showLicense = license: toString (map (l: l.shortName or "unknown") (lib.lists.toList license));
|
||
|
||
pos_str = meta: meta.position or "«unknown-file»";
|
||
|
||
remediation = {
|
||
unfree = remediate_whitelist "Unfree";
|
||
broken = remediate_whitelist "Broken";
|
||
unsupported = remediate_whitelist "UnsupportedSystem";
|
||
blacklisted = x: "";
|
||
insecure = remediate_insecure;
|
||
broken-outputs = remediateOutputsToInstall;
|
||
unknown-meta = x: "";
|
||
};
|
||
remediate_whitelist = allow_attr: attrs:
|
||
''
|
||
a) For `nixos-rebuild` you can set
|
||
{ nixpkgs.config.allow${allow_attr} = true; }
|
||
in configuration.nix to override this.
|
||
|
||
b) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
|
||
{ allow${allow_attr} = true; }
|
||
to ~/.config/nixpkgs/config.nix.
|
||
'';
|
||
|
||
remediate_insecure = attrs:
|
||
''
|
||
|
||
Known issues:
|
||
'' + (lib.concatStrings (map (issue: " - ${issue}\n") attrs.meta.knownVulnerabilities)) + ''
|
||
|
||
You can install it anyway by whitelisting this package, using the
|
||
following methods:
|
||
|
||
a) for `nixos-rebuild` you can add ‘${getName attrs}’ to
|
||
`nixpkgs.config.permittedInsecurePackages` in the configuration.nix,
|
||
like so:
|
||
|
||
{
|
||
nixpkgs.config.permittedInsecurePackages = [
|
||
"${getName attrs}"
|
||
];
|
||
}
|
||
|
||
b) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
|
||
‘${getName attrs}’ to `permittedInsecurePackages` in
|
||
~/.config/nixpkgs/config.nix, like so:
|
||
|
||
{
|
||
permittedInsecurePackages = [
|
||
"${getName attrs}"
|
||
];
|
||
}
|
||
|
||
'';
|
||
|
||
remediateOutputsToInstall = attrs: let
|
||
expectedOutputs = attrs.meta.outputsToInstall or [];
|
||
actualOutputs = attrs.outputs or [ "out" ];
|
||
missingOutputs = builtins.filter (output: ! builtins.elem output actualOutputs) expectedOutputs;
|
||
in ''
|
||
The package ${getName attrs} has set meta.outputsToInstall to: ${builtins.concatStringsSep ", " expectedOutputs}
|
||
|
||
however ${getName attrs} only has the outputs: ${builtins.concatStringsSep ", " actualOutputs}
|
||
|
||
and is missing the following ouputs:
|
||
|
||
${lib.concatStrings (builtins.map (output: " - ${output}\n") missingOutputs)}
|
||
'';
|
||
|
||
handleEvalIssue = { meta, attrs }: { reason , errormsg ? "" }:
|
||
let
|
||
msg = if inHydra
|
||
then "Failed to evaluate ${getName attrs}: «${reason}»: ${errormsg}"
|
||
else ''
|
||
Package ‘${getName attrs}’ in ${pos_str meta} ${errormsg}, refusing to evaluate.
|
||
|
||
'' + (builtins.getAttr reason remediation) attrs;
|
||
|
||
handler = if config ? handleEvalIssue
|
||
then config.handleEvalIssue reason
|
||
else throw;
|
||
in handler msg;
|
||
|
||
|
||
metaTypes = with lib.types; rec {
|
||
# These keys are documented
|
||
description = str;
|
||
longDescription = str;
|
||
branch = str;
|
||
homepage = either (listOf str) str;
|
||
downloadPage = str;
|
||
changelog = either (listOf str) str;
|
||
license = either (listOf lib.types.attrs) (either lib.types.attrs str);
|
||
maintainers = listOf (attrsOf str);
|
||
priority = int;
|
||
platforms = listOf str;
|
||
hydraPlatforms = listOf str;
|
||
broken = bool;
|
||
# TODO: refactor once something like Profpatsch's types-simple will land
|
||
# This is currently dead code due to https://github.com/NixOS/nix/issues/2532
|
||
tests = attrsOf (mkOptionType {
|
||
name = "test";
|
||
check = x: x == {} || ( # Accept {} for tests that are unsupported
|
||
isDerivation x &&
|
||
x ? meta.timeout
|
||
);
|
||
merge = lib.options.mergeOneOption;
|
||
});
|
||
timeout = int;
|
||
|
||
# Weirder stuff that doesn't appear in the documentation?
|
||
knownVulnerabilities = listOf str;
|
||
name = str;
|
||
version = str;
|
||
tag = str;
|
||
updateWalker = bool;
|
||
executables = listOf str;
|
||
outputsToInstall = listOf str;
|
||
position = str;
|
||
available = bool;
|
||
repositories = attrsOf str;
|
||
isBuildPythonPackage = platforms;
|
||
schedulingPriority = int;
|
||
downloadURLRegexp = str;
|
||
isFcitxEngine = bool;
|
||
isIbusEngine = bool;
|
||
isGutenprint = bool;
|
||
badPlatforms = platforms;
|
||
};
|
||
|
||
checkMetaAttr = k: v:
|
||
if metaTypes?${k} then
|
||
if metaTypes.${k}.check v then null else "key '${k}' has a value ${toString v} of an invalid type ${builtins.typeOf v}; expected ${metaTypes.${k}.description}"
|
||
else "key '${k}' is unrecognized; expected one of: \n\t [${lib.concatMapStringsSep ", " (x: "'${x}'") (lib.attrNames metaTypes)}]";
|
||
checkMeta = meta: if shouldCheckMeta then lib.remove null (lib.mapAttrsToList checkMetaAttr meta) else [];
|
||
|
||
checkOutputsToInstall = attrs: let
|
||
expectedOutputs = attrs.meta.outputsToInstall or [];
|
||
actualOutputs = attrs.outputs or [ "out" ];
|
||
missingOutputs = builtins.filter (output: ! builtins.elem output actualOutputs) expectedOutputs;
|
||
in if shouldCheckMeta
|
||
then builtins.length missingOutputs > 0
|
||
else false;
|
||
|
||
# Check if a derivation is valid, that is whether it passes checks for
|
||
# e.g brokenness or license.
|
||
#
|
||
# Return { valid: Bool } and additionally
|
||
# { reason: String; errormsg: String } if it is not valid, where
|
||
# reason is one of "unfree", "blacklisted" or "broken".
|
||
checkValidity = attrs:
|
||
if hasDeniedUnfreeLicense attrs && !(hasWhitelistedLicense attrs) then
|
||
{ valid = false; reason = "unfree"; errormsg = "has an unfree license (‘${showLicense attrs.meta.license}’)"; }
|
||
else if hasBlacklistedLicense attrs then
|
||
{ valid = false; reason = "blacklisted"; errormsg = "has a blacklisted license (‘${showLicense attrs.meta.license}’)"; }
|
||
else if !allowBroken && attrs.meta.broken or false then
|
||
{ valid = false; reason = "broken"; errormsg = "is marked as broken"; }
|
||
else if !allowUnsupportedSystem &&
|
||
(!lib.lists.elem hostPlatform.system (attrs.meta.platforms or lib.platforms.all) ||
|
||
lib.lists.elem hostPlatform.system (attrs.meta.badPlatforms or [])) then
|
||
{ valid = false; reason = "unsupported"; errormsg = "is not supported on ‘${hostPlatform.system}’"; }
|
||
else if !(hasAllowedInsecure attrs) then
|
||
{ valid = false; reason = "insecure"; errormsg = "is marked as insecure"; }
|
||
else if checkOutputsToInstall attrs then
|
||
{ valid = false; reason = "broken-outputs"; errormsg = "has invalid meta.outputsToInstall"; }
|
||
else let res = checkMeta (attrs.meta or {}); in if res != [] then
|
||
{ valid = false; reason = "unknown-meta"; errormsg = "has an invalid meta attrset:${lib.concatMapStrings (x: "\n\t - " + x) res}"; }
|
||
else { valid = true; };
|
||
|
||
assertValidity = { meta, attrs }: let
|
||
validity = checkValidity attrs;
|
||
in validity // {
|
||
# Throw an error if trying to evaluate an non-valid derivation
|
||
handled = if !validity.valid
|
||
then handleEvalIssue { inherit meta attrs; } (removeAttrs validity ["valid"])
|
||
else true;
|
||
};
|
||
|
||
in assertValidity
|