549 lines
25 KiB
Nix
549 lines
25 KiB
Nix
{ lib, config }:
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stdenv:
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let
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checkMeta = import ./check-meta.nix {
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inherit lib config;
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# Nix itself uses the `system` field of a derivation to decide where
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# to build it. This is a bit confusing for cross compilation.
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inherit (stdenv) hostPlatform;
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};
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# Based off lib.makeExtensible, with modifications:
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makeDerivationExtensible = rattrs:
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let
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# NOTE: The following is a hint that will be printed by the Nix cli when
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# encountering an infinite recursion. It must not be formatted into
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# separate lines, because Nix would only show the last line of the comment.
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# An infinite recursion here can be caused by having the attribute names of expression `e` in `.overrideAttrs(finalAttrs: previousAttrs: e)` depend on `finalAttrs`. Only the attribute values of `e` can depend on `finalAttrs`.
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args = rattrs (args // { inherit finalPackage overrideAttrs; });
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# ^^^^
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overrideAttrs = f0:
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let
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f = self: super:
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# Convert f0 to an overlay. Legacy is:
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# overrideAttrs (super: {})
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# We want to introduce self. We follow the convention of overlays:
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# overrideAttrs (self: super: {})
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# Which means the first parameter can be either self or super.
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# This is surprising, but far better than the confusion that would
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# arise from flipping an overlay's parameters in some cases.
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let x = f0 super;
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in
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if builtins.isFunction x
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then
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# Can't reuse `x`, because `self` comes first.
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# Looks inefficient, but `f0 super` was a cheap thunk.
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f0 self super
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else x;
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in
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makeDerivationExtensible
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(self: let super = rattrs self; in super // (if builtins.isFunction f0 || f0?__functor then f self super else f0));
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finalPackage =
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mkDerivationSimple overrideAttrs args;
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in finalPackage;
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# makeDerivationExtensibleConst == makeDerivationExtensible (_: attrs),
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# but pre-evaluated for a slight improvement in performance.
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makeDerivationExtensibleConst = attrs:
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mkDerivationSimple
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(f0:
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let
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f = self: super:
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let x = f0 super;
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in
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if builtins.isFunction x
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then
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f0 self super
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else x;
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in
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makeDerivationExtensible (self: attrs // (if builtins.isFunction f0 || f0?__functor then f self attrs else f0)))
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attrs;
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mkDerivationSimple = overrideAttrs:
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# `mkDerivation` wraps the builtin `derivation` function to
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# produce derivations that use this stdenv and its shell.
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#
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# See also:
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#
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# * https://nixos.org/nixpkgs/manual/#sec-using-stdenv
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# Details on how to use this mkDerivation function
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#
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# * https://nixos.org/manual/nix/stable/expressions/derivations.html#derivations
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# Explanation about derivations in general
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{
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# These types of dependencies are all exhaustively documented in
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# the "Specifying Dependencies" section of the "Standard
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# Environment" chapter of the Nixpkgs manual.
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# TODO(@Ericson2314): Stop using legacy dep attribute names
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# host offset -> target offset
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depsBuildBuild ? [] # -1 -> -1
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, depsBuildBuildPropagated ? [] # -1 -> -1
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, nativeBuildInputs ? [] # -1 -> 0 N.B. Legacy name
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, propagatedNativeBuildInputs ? [] # -1 -> 0 N.B. Legacy name
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, depsBuildTarget ? [] # -1 -> 1
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, depsBuildTargetPropagated ? [] # -1 -> 1
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, depsHostHost ? [] # 0 -> 0
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, depsHostHostPropagated ? [] # 0 -> 0
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, buildInputs ? [] # 0 -> 1 N.B. Legacy name
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, propagatedBuildInputs ? [] # 0 -> 1 N.B. Legacy name
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, depsTargetTarget ? [] # 1 -> 1
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, depsTargetTargetPropagated ? [] # 1 -> 1
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, checkInputs ? []
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, installCheckInputs ? []
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, nativeCheckInputs ? []
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, nativeInstallCheckInputs ? []
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# Configure Phase
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, configureFlags ? []
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, cmakeFlags ? []
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, mesonFlags ? []
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, # Target is not included by default because most programs don't care.
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# Including it then would cause needless mass rebuilds.
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#
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# TODO(@Ericson2314): Make [ "build" "host" ] always the default / resolve #87909
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configurePlatforms ? lib.optionals
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(stdenv.hostPlatform != stdenv.buildPlatform || config.configurePlatformsByDefault)
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[ "build" "host" ]
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# TODO(@Ericson2314): Make unconditional / resolve #33599
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# Check phase
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, doCheck ? config.doCheckByDefault or false
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# TODO(@Ericson2314): Make unconditional / resolve #33599
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# InstallCheck phase
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, doInstallCheck ? config.doCheckByDefault or false
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, # TODO(@Ericson2314): Make always true and remove / resolve #178468
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strictDeps ? if config.strictDepsByDefault then true else stdenv.hostPlatform != stdenv.buildPlatform
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, enableParallelBuilding ? config.enableParallelBuildingByDefault
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, meta ? {}
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, passthru ? {}
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, pos ? # position used in error messages and for meta.position
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(if attrs.meta.description or null != null
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then builtins.unsafeGetAttrPos "description" attrs.meta
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else if attrs.version or null != null
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then builtins.unsafeGetAttrPos "version" attrs
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else builtins.unsafeGetAttrPos "name" attrs)
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, separateDebugInfo ? false
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, outputs ? [ "out" ]
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, __darwinAllowLocalNetworking ? false
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, __impureHostDeps ? []
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, __propagatedImpureHostDeps ? []
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, sandboxProfile ? ""
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, propagatedSandboxProfile ? ""
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, hardeningEnable ? []
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, hardeningDisable ? []
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, patches ? []
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, __contentAddressed ?
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(! attrs ? outputHash) # Fixed-output drvs can't be content addressed too
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&& config.contentAddressedByDefault
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# Experimental. For simple packages mostly just works,
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# but for anything complex, be prepared to debug if enabling.
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, __structuredAttrs ? config.structuredAttrsByDefault or false
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, env ? { }
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, ... } @ attrs:
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let
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# TODO(@oxij, @Ericson2314): This is here to keep the old semantics, remove when
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# no package has `doCheck = true`.
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doCheck' = doCheck && stdenv.buildPlatform.canExecute stdenv.hostPlatform;
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doInstallCheck' = doInstallCheck && stdenv.buildPlatform.canExecute stdenv.hostPlatform;
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separateDebugInfo' = separateDebugInfo && stdenv.hostPlatform.isLinux;
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outputs' = outputs ++ lib.optional separateDebugInfo' "debug";
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# Turn a derivation into its outPath without a string context attached.
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# See the comment at the usage site.
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unsafeDerivationToUntrackedOutpath = drv:
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if lib.isDerivation drv
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then builtins.unsafeDiscardStringContext drv.outPath
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else drv;
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noNonNativeDeps = builtins.length (depsBuildTarget ++ depsBuildTargetPropagated
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++ depsHostHost ++ depsHostHostPropagated
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++ buildInputs ++ propagatedBuildInputs
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++ depsTargetTarget ++ depsTargetTargetPropagated) == 0;
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dontAddHostSuffix = attrs ? outputHash && !noNonNativeDeps || !stdenv.hasCC;
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hardeningDisable' = if lib.any (x: x == "fortify") hardeningDisable
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# disabling fortify implies fortify3 should also be disabled
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then lib.unique (hardeningDisable ++ [ "fortify3" ])
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else hardeningDisable;
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supportedHardeningFlags = [ "fortify" "fortify3" "stackprotector" "pie" "pic" "strictoverflow" "format" "relro" "bindnow" ];
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# Musl-based platforms will keep "pie", other platforms will not.
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# If you change this, make sure to update section `{#sec-hardening-in-nixpkgs}`
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# in the nixpkgs manual to inform users about the defaults.
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defaultHardeningFlags = if stdenv.hostPlatform.isMusl &&
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# Except when:
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# - static aarch64, where compilation works, but produces segfaulting dynamically linked binaries.
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# - static armv7l, where compilation fails.
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!(stdenv.hostPlatform.isAarch && stdenv.hostPlatform.isStatic)
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then supportedHardeningFlags
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else lib.remove "pie" supportedHardeningFlags;
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enabledHardeningOptions =
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if builtins.elem "all" hardeningDisable'
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then []
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else lib.subtractLists hardeningDisable' (defaultHardeningFlags ++ hardeningEnable);
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# hardeningDisable additionally supports "all".
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erroneousHardeningFlags = lib.subtractLists supportedHardeningFlags (hardeningEnable ++ lib.remove "all" hardeningDisable);
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checkDependencyList = checkDependencyList' [];
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checkDependencyList' = positions: name: deps: lib.flip lib.imap1 deps (index: dep:
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if lib.isDerivation dep || dep == null || builtins.isString dep || builtins.isPath dep then dep
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else if lib.isList dep then checkDependencyList' ([index] ++ positions) name dep
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else throw "Dependency is not of a valid type: ${lib.concatMapStrings (ix: "element ${toString ix} of ") ([index] ++ positions)}${name} for ${attrs.name or attrs.pname}");
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in if builtins.length erroneousHardeningFlags != 0
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then abort ("mkDerivation was called with unsupported hardening flags: " + lib.generators.toPretty {} {
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inherit erroneousHardeningFlags hardeningDisable hardeningEnable supportedHardeningFlags;
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})
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else let
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doCheck = doCheck';
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doInstallCheck = doInstallCheck';
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buildInputs' = buildInputs
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++ lib.optionals doCheck checkInputs
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++ lib.optionals doInstallCheck installCheckInputs;
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nativeBuildInputs' = nativeBuildInputs
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++ lib.optional separateDebugInfo' ../../build-support/setup-hooks/separate-debug-info.sh
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++ lib.optional stdenv.hostPlatform.isWindows ../../build-support/setup-hooks/win-dll-link.sh
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++ lib.optionals doCheck nativeCheckInputs
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++ lib.optionals doInstallCheck nativeInstallCheckInputs;
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outputs = outputs';
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references = nativeBuildInputs ++ buildInputs
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++ propagatedNativeBuildInputs ++ propagatedBuildInputs;
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dependencies = map (map lib.chooseDevOutputs) [
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[
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(map (drv: drv.__spliced.buildBuild or drv) (checkDependencyList "depsBuildBuild" depsBuildBuild))
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(map (drv: drv.__spliced.buildHost or drv) (checkDependencyList "nativeBuildInputs" nativeBuildInputs'))
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(map (drv: drv.__spliced.buildTarget or drv) (checkDependencyList "depsBuildTarget" depsBuildTarget))
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]
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[
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(map (drv: drv.__spliced.hostHost or drv) (checkDependencyList "depsHostHost" depsHostHost))
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(map (drv: drv.__spliced.hostTarget or drv) (checkDependencyList "buildInputs" buildInputs'))
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]
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[
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(map (drv: drv.__spliced.targetTarget or drv) (checkDependencyList "depsTargetTarget" depsTargetTarget))
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]
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];
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propagatedDependencies = map (map lib.chooseDevOutputs) [
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[
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(map (drv: drv.__spliced.buildBuild or drv) (checkDependencyList "depsBuildBuildPropagated" depsBuildBuildPropagated))
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(map (drv: drv.__spliced.buildHost or drv) (checkDependencyList "propagatedNativeBuildInputs" propagatedNativeBuildInputs))
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(map (drv: drv.__spliced.buildTarget or drv) (checkDependencyList "depsBuildTargetPropagated" depsBuildTargetPropagated))
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]
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[
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(map (drv: drv.__spliced.hostHost or drv) (checkDependencyList "depsHostHostPropagated" depsHostHostPropagated))
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(map (drv: drv.__spliced.hostTarget or drv) (checkDependencyList "propagatedBuildInputs" propagatedBuildInputs))
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]
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[
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(map (drv: drv.__spliced.targetTarget or drv) (checkDependencyList "depsTargetTargetPropagated" depsTargetTargetPropagated))
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]
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];
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computedSandboxProfile =
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lib.concatMap (input: input.__propagatedSandboxProfile or [])
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(stdenv.extraNativeBuildInputs
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++ stdenv.extraBuildInputs
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++ lib.concatLists dependencies);
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computedPropagatedSandboxProfile =
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lib.concatMap (input: input.__propagatedSandboxProfile or [])
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(lib.concatLists propagatedDependencies);
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computedImpureHostDeps =
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lib.unique (lib.concatMap (input: input.__propagatedImpureHostDeps or [])
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(stdenv.extraNativeBuildInputs
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++ stdenv.extraBuildInputs
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++ lib.concatLists dependencies));
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computedPropagatedImpureHostDeps =
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lib.unique (lib.concatMap (input: input.__propagatedImpureHostDeps or [])
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(lib.concatLists propagatedDependencies));
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envIsExportable = lib.isAttrs env && !lib.isDerivation env;
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derivationArg =
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(removeAttrs attrs
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(["meta" "passthru" "pos"
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"checkInputs" "installCheckInputs"
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"nativeCheckInputs" "nativeInstallCheckInputs"
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"__contentAddressed"
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"__darwinAllowLocalNetworking"
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"__impureHostDeps" "__propagatedImpureHostDeps"
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"sandboxProfile" "propagatedSandboxProfile"]
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++ lib.optional (__structuredAttrs || envIsExportable) "env"))
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// (lib.optionalAttrs (attrs ? name || (attrs ? pname && attrs ? version)) {
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name =
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let
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# Indicate the host platform of the derivation if cross compiling.
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# Fixed-output derivations like source tarballs shouldn't get a host
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# suffix. But we have some weird ones with run-time deps that are
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# just used for their side-affects. Those might as well since the
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# hash can't be the same. See #32986.
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hostSuffix = lib.optionalString
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(stdenv.hostPlatform != stdenv.buildPlatform && !dontAddHostSuffix)
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"-${stdenv.hostPlatform.config}";
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# Disambiguate statically built packages. This was originally
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# introduce as a means to prevent nix-env to get confused between
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# nix and nixStatic. This should be also achieved by moving the
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# hostSuffix before the version, so we could contemplate removing
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# it again.
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staticMarker = lib.optionalString stdenv.hostPlatform.isStatic "-static";
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in
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lib.strings.sanitizeDerivationName (
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if attrs ? name
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then attrs.name + hostSuffix
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else
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# we cannot coerce null to a string below
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assert lib.assertMsg (attrs ? version && attrs.version != null) "The ‘version’ attribute cannot be null.";
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"${attrs.pname}${staticMarker}${hostSuffix}-${attrs.version}"
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);
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}) // lib.optionalAttrs __structuredAttrs { env = checkedEnv; } // {
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builder = attrs.realBuilder or stdenv.shell;
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args = attrs.args or ["-e" (attrs.builder or ./default-builder.sh)];
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inherit stdenv;
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# The `system` attribute of a derivation has special meaning to Nix.
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# Derivations set it to choose what sort of machine could be used to
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# execute the build, The build platform entirely determines this,
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# indeed more finely than Nix knows or cares about. The `system`
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# attribute of `buildPlatfom` matches Nix's degree of specificity.
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# exactly.
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inherit (stdenv.buildPlatform) system;
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userHook = config.stdenv.userHook or null;
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__ignoreNulls = true;
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inherit __structuredAttrs strictDeps;
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depsBuildBuild = lib.elemAt (lib.elemAt dependencies 0) 0;
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nativeBuildInputs = lib.elemAt (lib.elemAt dependencies 0) 1;
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depsBuildTarget = lib.elemAt (lib.elemAt dependencies 0) 2;
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depsHostHost = lib.elemAt (lib.elemAt dependencies 1) 0;
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buildInputs = lib.elemAt (lib.elemAt dependencies 1) 1;
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depsTargetTarget = lib.elemAt (lib.elemAt dependencies 2) 0;
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depsBuildBuildPropagated = lib.elemAt (lib.elemAt propagatedDependencies 0) 0;
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propagatedNativeBuildInputs = lib.elemAt (lib.elemAt propagatedDependencies 0) 1;
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depsBuildTargetPropagated = lib.elemAt (lib.elemAt propagatedDependencies 0) 2;
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depsHostHostPropagated = lib.elemAt (lib.elemAt propagatedDependencies 1) 0;
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propagatedBuildInputs = lib.elemAt (lib.elemAt propagatedDependencies 1) 1;
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depsTargetTargetPropagated = lib.elemAt (lib.elemAt propagatedDependencies 2) 0;
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# This parameter is sometimes a string, sometimes null, and sometimes a list, yuck
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configureFlags = let inherit (lib) optional elem; in
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configureFlags
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++ optional (elem "build" configurePlatforms) "--build=${stdenv.buildPlatform.config}"
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++ optional (elem "host" configurePlatforms) "--host=${stdenv.hostPlatform.config}"
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++ optional (elem "target" configurePlatforms) "--target=${stdenv.targetPlatform.config}";
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cmakeFlags =
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cmakeFlags
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++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) ([
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"-DCMAKE_SYSTEM_NAME=${lib.findFirst lib.isString "Generic" (lib.optional (!stdenv.hostPlatform.isRedox) stdenv.hostPlatform.uname.system)}"
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] ++ lib.optionals (stdenv.hostPlatform.uname.processor != null) [
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"-DCMAKE_SYSTEM_PROCESSOR=${stdenv.hostPlatform.uname.processor}"
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] ++ lib.optionals (stdenv.hostPlatform.uname.release != null) [
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"-DCMAKE_SYSTEM_VERSION=${stdenv.hostPlatform.uname.release}"
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] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
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"-DCMAKE_OSX_ARCHITECTURES=${stdenv.hostPlatform.darwinArch}"
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] ++ lib.optionals (stdenv.buildPlatform.uname.system != null) [
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"-DCMAKE_HOST_SYSTEM_NAME=${stdenv.buildPlatform.uname.system}"
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] ++ lib.optionals (stdenv.buildPlatform.uname.processor != null) [
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"-DCMAKE_HOST_SYSTEM_PROCESSOR=${stdenv.buildPlatform.uname.processor}"
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] ++ lib.optionals (stdenv.buildPlatform.uname.release != null) [
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"-DCMAKE_HOST_SYSTEM_VERSION=${stdenv.buildPlatform.uname.release}"
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]);
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mesonFlags =
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let
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# See https://mesonbuild.com/Reference-tables.html#cpu-families
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cpuFamily = platform: with platform;
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/**/ if isAarch32 then "arm"
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else if isx86_32 then "x86"
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else platform.uname.processor;
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crossFile = builtins.toFile "cross-file.conf" ''
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[properties]
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needs_exe_wrapper = ${lib.boolToString (!stdenv.buildPlatform.canExecute stdenv.hostPlatform)}
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[host_machine]
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system = '${stdenv.targetPlatform.parsed.kernel.name}'
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cpu_family = '${cpuFamily stdenv.targetPlatform}'
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cpu = '${stdenv.targetPlatform.parsed.cpu.name}'
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endian = ${if stdenv.targetPlatform.isLittleEndian then "'little'" else "'big'"}
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[binaries]
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llvm-config = 'llvm-config-native'
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'';
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crossFlags = lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [ "--cross-file=${crossFile}" ];
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in crossFlags ++ mesonFlags;
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inherit patches;
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inherit doCheck doInstallCheck;
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inherit outputs;
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} // lib.optionalAttrs (__contentAddressed) {
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inherit __contentAddressed;
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# Provide default values for outputHashMode and outputHashAlgo because
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# most people won't care about these anyways
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outputHashAlgo = attrs.outputHashAlgo or "sha256";
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outputHashMode = attrs.outputHashMode or "recursive";
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} // lib.optionalAttrs (enableParallelBuilding) {
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inherit enableParallelBuilding;
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enableParallelChecking = attrs.enableParallelChecking or true;
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enableParallelInstalling = attrs.enableParallelInstalling or true;
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} // lib.optionalAttrs (hardeningDisable != [] || hardeningEnable != [] || stdenv.hostPlatform.isMusl) {
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NIX_HARDENING_ENABLE = enabledHardeningOptions;
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} // lib.optionalAttrs (stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform ? gcc.arch) {
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requiredSystemFeatures = attrs.requiredSystemFeatures or [] ++ [ "gccarch-${stdenv.hostPlatform.gcc.arch}" ];
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} // lib.optionalAttrs (stdenv.buildPlatform.isDarwin) {
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inherit __darwinAllowLocalNetworking;
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# TODO: remove lib.unique once nix has a list canonicalization primitive
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__sandboxProfile =
|
||
let profiles = [ stdenv.extraSandboxProfile ] ++ computedSandboxProfile ++ computedPropagatedSandboxProfile ++ [ propagatedSandboxProfile sandboxProfile ];
|
||
final = lib.concatStringsSep "\n" (lib.filter (x: x != "") (lib.unique profiles));
|
||
in final;
|
||
__propagatedSandboxProfile = lib.unique (computedPropagatedSandboxProfile ++ [ propagatedSandboxProfile ]);
|
||
__impureHostDeps = computedImpureHostDeps ++ computedPropagatedImpureHostDeps ++ __propagatedImpureHostDeps ++ __impureHostDeps ++ stdenv.__extraImpureHostDeps ++ [
|
||
"/dev/zero"
|
||
"/dev/random"
|
||
"/dev/urandom"
|
||
"/bin/sh"
|
||
];
|
||
__propagatedImpureHostDeps = computedPropagatedImpureHostDeps ++ __propagatedImpureHostDeps;
|
||
} //
|
||
# If we use derivations directly here, they end up as build-time dependencies.
|
||
# This is especially problematic in the case of disallowed*, since the disallowed
|
||
# derivations will be built by nix as build-time dependencies, while those
|
||
# derivations might take a very long time to build, or might not even build
|
||
# successfully on the platform used.
|
||
# We can improve on this situation by instead passing only the outPath,
|
||
# without an attached string context, to nix. The out path will be a placeholder
|
||
# which will be replaced by the actual out path if the derivation in question
|
||
# is part of the final closure (and thus needs to be built). If it is not
|
||
# part of the final closure, then the placeholder will be passed along,
|
||
# but in that case we know for a fact that the derivation is not part of the closure.
|
||
# This means that passing the out path to nix does the right thing in either
|
||
# case, both for disallowed and allowed references/requisites, and we won't
|
||
# build the derivation if it wouldn't be part of the closure, saving time and resources.
|
||
# While the problem is less severe for allowed*, since we want the derivation
|
||
# to be built eventually, we would still like to get the error early and without
|
||
# having to wait while nix builds a derivation that might not be used.
|
||
# See also https://github.com/NixOS/nix/issues/4629
|
||
lib.optionalAttrs (attrs ? disallowedReferences) {
|
||
disallowedReferences =
|
||
map unsafeDerivationToUntrackedOutpath attrs.disallowedReferences;
|
||
} //
|
||
lib.optionalAttrs (attrs ? disallowedRequisites) {
|
||
disallowedRequisites =
|
||
map unsafeDerivationToUntrackedOutpath attrs.disallowedRequisites;
|
||
} //
|
||
lib.optionalAttrs (attrs ? allowedReferences) {
|
||
allowedReferences =
|
||
lib.mapNullable unsafeDerivationToUntrackedOutpath attrs.allowedReferences;
|
||
} //
|
||
lib.optionalAttrs (attrs ? allowedRequisites) {
|
||
allowedRequisites =
|
||
lib.mapNullable unsafeDerivationToUntrackedOutpath attrs.allowedRequisites;
|
||
};
|
||
|
||
meta = checkMeta.commonMeta { inherit validity attrs pos references; };
|
||
validity = checkMeta.assertValidity { inherit meta attrs; };
|
||
|
||
checkedEnv =
|
||
let
|
||
overlappingNames = lib.attrNames (builtins.intersectAttrs env derivationArg);
|
||
in
|
||
assert lib.assertMsg envIsExportable
|
||
"When using structured attributes, `env` must be an attribute set of environment variables.";
|
||
assert lib.assertMsg (overlappingNames == [ ])
|
||
"The ‘env’ attribute set cannot contain any attributes passed to derivation. The following attributes are overlapping: ${lib.concatStringsSep ", " overlappingNames}";
|
||
lib.mapAttrs
|
||
(n: v: assert lib.assertMsg (lib.isString v || lib.isBool v || lib.isInt v || lib.isDerivation v)
|
||
"The ‘env’ attribute set can only contain derivation, string, boolean or integer attributes. The ‘${n}’ attribute is of type ${builtins.typeOf v}."; v)
|
||
env;
|
||
|
||
in
|
||
|
||
lib.extendDerivation
|
||
validity.handled
|
||
({
|
||
# A derivation that always builds successfully and whose runtime
|
||
# dependencies are the original derivations build time dependencies
|
||
# This allows easy building and distributing of all derivations
|
||
# needed to enter a nix-shell with
|
||
# nix-build shell.nix -A inputDerivation
|
||
inputDerivation = derivation (derivationArg // {
|
||
# Add a name in case the original drv didn't have one
|
||
name = derivationArg.name or "inputDerivation";
|
||
# This always only has one output
|
||
outputs = [ "out" ];
|
||
|
||
# Propagate the original builder and arguments, since we override
|
||
# them and they might contain references to build inputs
|
||
_derivation_original_builder = derivationArg.builder;
|
||
_derivation_original_args = derivationArg.args;
|
||
|
||
builder = stdenv.shell;
|
||
# The bash builtin `export` dumps all current environment variables,
|
||
# which is where all build input references end up (e.g. $PATH for
|
||
# binaries). By writing this to $out, Nix can find and register
|
||
# them as runtime dependencies (since Nix greps for store paths
|
||
# through $out to find them)
|
||
args = [ "-c" ''
|
||
export > $out
|
||
for var in $passAsFile; do
|
||
pathVar="''${var}Path"
|
||
printf "%s" "$(< "''${!pathVar}")" >> $out
|
||
done
|
||
'' ];
|
||
|
||
# inputDerivation produces the inputs; not the outputs, so any
|
||
# restrictions on what used to be the outputs don't serve a purpose
|
||
# anymore.
|
||
allowedReferences = null;
|
||
allowedRequisites = null;
|
||
disallowedReferences = [ ];
|
||
disallowedRequisites = [ ];
|
||
});
|
||
|
||
inherit passthru overrideAttrs;
|
||
inherit meta;
|
||
} //
|
||
# Pass through extra attributes that are not inputs, but
|
||
# should be made available to Nix expressions using the
|
||
# derivation (e.g., in assertions).
|
||
passthru)
|
||
(derivation (derivationArg // lib.optionalAttrs envIsExportable checkedEnv));
|
||
|
||
in
|
||
fnOrAttrs:
|
||
if builtins.isFunction fnOrAttrs
|
||
then makeDerivationExtensible fnOrAttrs
|
||
else makeDerivationExtensibleConst fnOrAttrs
|