stdenv: Fix handling of dependencies and hooks
4 far-reaching changes: Smaller PATH, New vars, different propagation logic, and different hook logic Smaller PATH ------------ `buildInputs` no longer go on the PATH at build time, as they cannot be run when cross compiling and we don't want to special case. Simply make a `nativeBuildInput` too if one needs them on the PATH. Fixes #21191. Many new depedendency variables ------------------------------- See the stdenv chapter of the nixpkgs manual. I pulled out the existing documentation of dependency specification into a new section, and added language for these two (and their propagated equivalents) along side the others'. More complex propagation logic ------------------------------ Before a propagated*XXX*Input always acted as if it was specified directly as a *XXX*Input downstream. That's simple enough, but violates the intended roles of each sort of dep, which has functional and not just stylistic consequences. The new algorithm is detailed in the manual, and ensures everything ends up in the right place. I tried to give both an informal and formal description, but I suspect in practice it will not make much sense until one tries cross compiling, after which it will immediately make sense as the only sane option. Simplified hook logic --------------------- Rather than `envHook` and `crossEnvHook`, whose behavior differs depending on whether we are cross compiling or not, there is now one hook per sort (or rather non-propagated and propagated pair of sorts) of dependency. These new hooks have the same meaning regardless of cross compilation. See the setup hook section of stdenv chapter of the Nixpkgs manual for more details.
This commit is contained in:
John Ericson
parent
bb18a3b573
commit
7f3ca3e21a
@ -14,11 +14,27 @@ rec {
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mkDerivation =
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{ name ? ""
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, nativeBuildInputs ? []
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, buildInputs ? []
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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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, propagatedNativeBuildInputs ? []
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, propagatedBuildInputs ? []
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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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, configureFlags ? []
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, # Target is not included by default because most programs don't care.
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@ -56,15 +72,35 @@ rec {
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inherit erroneousHardeningFlags hardeningDisable hardeningEnable supportedHardeningFlags;
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})
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else let
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dependencies = map lib.chooseDevOutputs [
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(map (drv: drv.nativeDrv or drv) 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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(map (drv: drv.crossDrv or drv) buildInputs)
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dependencies = map (map lib.chooseDevOutputs) [
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[
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(map (drv: drv.__spliced.buildBuild or drv) depsBuildBuild)
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(map (drv: drv.nativeDrv or drv) 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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(map (drv: drv.__spliced.buildTarget or drv) depsBuildTarget)
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]
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[
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(map (drv: drv.__spliced.hostHost or drv) depsHostHost)
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(map (drv: drv.crossDrv or drv) buildInputs)
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]
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[
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(map (drv: drv.__spliced.targetTarget or drv) depsTargetTarget)
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]
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];
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propagatedDependencies = map lib.chooseDevOutputs [
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(map (drv: drv.nativeDrv or drv) propagatedNativeBuildInputs)
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(map (drv: drv.crossDrv or drv) propagatedBuildInputs)
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propagatedDependencies = map (map lib.chooseDevOutputs) [
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[
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(map (drv: drv.__spliced.buildBuild or drv) depsBuildBuildPropagated)
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(map (drv: drv.nativeDrv or drv) propagatedNativeBuildInputs)
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(map (drv: drv.__spliced.buildTarget or drv) depsBuildTargetPropagated)
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]
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[
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(map (drv: drv.__spliced.hostHost or drv) depsHostHostPropagated)
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(map (drv: drv.crossDrv or drv) propagatedBuildInputs)
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]
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[
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(map (drv: drv.__spliced.targetTarget or drv) depsTargetTargetPropagated)
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]
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];
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outputs' =
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@ -105,11 +141,19 @@ rec {
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userHook = config.stdenv.userHook or null;
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__ignoreNulls = true;
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nativeBuildInputs = lib.elemAt dependencies 0;
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buildInputs = lib.elemAt dependencies 1;
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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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depsHostBuild = 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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propagatedNativeBuildInputs = lib.elemAt propagatedDependencies 0;
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propagatedBuildInputs = lib.elemAt propagatedDependencies 1;
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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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depsHostBuildPropagated = 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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@ -300,11 +300,72 @@ runHook preHook
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runHook addInputsHook
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# Recursively find all build inputs.
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# Package accumulators
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# shellcheck disable=SC2034
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declare -a pkgsBuildBuild pkgsBuildHost pkgsBuildTarget
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declare -a pkgsHostHost pkgsHostTarget
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declare -a pkgsTargetTarget
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declare -ra pkgBuildAccumVars=(pkgsBuildBuild pkgsBuildHost pkgsBuildTarget)
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declare -ra pkgHostAccumVars=(pkgsHostHost pkgsHostTarget)
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declare -ra pkgTargetAccumVars=(pkgsTargetTarget)
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declare -ra pkgAccumVarVars=(pkgBuildAccumVars pkgHostAccumVars pkgTargetAccumVars)
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# Hooks
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declare -a envBuildBuildHooks envBuildHostHooks envBuildTargetHooks
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declare -a envHostHostHooks envHostTargetHooks
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declare -a envTargetTargetHooks
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declare -ra pkgBuildHookVars=(envBuildBuildHook envBuildHostHook envBuildTargetHook)
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declare -ra pkgHostHookVars=(envHostHostHook envHostTargetHook)
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declare -ra pkgTargetHookVars=(envTargetTargetHook)
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declare -ra pkgHookVarVars=(pkgBuildHookVars pkgHostHookVars pkgTargetHookVars)
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# Propagated dep files
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declare -ra propagatedBuildDepFiles=(
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propagated-build-build-deps
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propagated-native-build-inputs # Legacy name for back-compat
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propagated-build-target-deps
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)
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declare -ra propagatedHostDepFiles=(
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propagated-host-host-deps
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propagated-build-inputs # Legacy name for back-compat
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)
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declare -ra propagatedTargetDepFiles=(
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propagated-target-target-deps
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)
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declare -ra propagatedDepFilesVars=(
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propagatedBuildDepFiles
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propagatedHostDepFiles
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propagatedTargetDepFiles
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)
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# Platform offsets: build = -1, host = 0, target = 1
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declare -ra allPlatOffsets=(-1 0 1)
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# Mutually-recursively find all build inputs. See the dependency section of the
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# stdenv chapter of the Nixpkgs manual for the specification this algorithm
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# implements.
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findInputs() {
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local pkg="$1"; shift
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local var="$1"; shift
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local propagatedBuildInputsFiles=("$@")
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local -r pkg="$1"
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local -ri hostOffset="$2"
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local -ri targetOffset="$3"
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# Sanity check
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(( "$hostOffset" <= "$targetOffset" )) || exit -1
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local varVar="${pkgAccumVarVars[$hostOffset + 1]}"
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local varRef="$varVar[\$targetOffset - \$hostOffset]"
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local var="${!varRef}"
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unset -v varVar varRef
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# TODO(@Ericson2314): Restore using associative array once Darwin
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# nix-shell doesn't use impure bash. This should replace the O(n)
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@ -324,21 +385,106 @@ findInputs() {
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exit 1
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fi
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local file
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for file in "${propagatedBuildInputsFiles[@]}"; do
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file="$pkg/nix-support/$file"
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[[ -f "$file" ]] || continue
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# The current package's host and target offset together
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# provide a <=-preserving homomorphism from the relative
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# offsets to current offset
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function mapOffset() {
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local -ri inputOffset="$1"
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if (( "$inputOffset" <= 0 )); then
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local -ri outputOffset="$inputOffset + $hostOffset"
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else
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local -ri outputOffset="$inputOffset - 1 + $targetOffset"
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fi
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echo "$outputOffset"
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}
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local pkgNext
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for pkgNext in $(< "$file"); do
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findInputs "$pkgNext" "$var" "${propagatedBuildInputsFiles[@]}"
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# Host offset relative to that of the package whose immediate
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# dependencies we are currently exploring.
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local -i relHostOffset
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for relHostOffset in "${allPlatOffsets[@]}"; do
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# `+ 1` so we start at 0 for valid index
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local files="${propagatedDepFilesVars[$relHostOffset + 1]}"
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# Host offset relative to the package currently being
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# built---as absolute an offset as will be used.
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local -i hostOffsetNext
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hostOffsetNext="$(mapOffset relHostOffset)"
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# Ensure we're in bounds relative to the package currently
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# being built.
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[[ "${allPlatOffsets[*]}" = *"$hostOffsetNext"* ]] || continue
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# Target offset relative to the *host* offset of the package
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# whose immediate dependencies we are currently exploring.
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local -i relTargetOffset
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for relTargetOffset in "${allPlatOffsets[@]}"; do
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(( "$relHostOffset" <= "$relTargetOffset" )) || continue
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local fileRef="${files}[$relTargetOffset - $relHostOffset]"
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local file="${!fileRef}"
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unset -v fileRef
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# Target offset relative to the package currently being
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# built.
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local -i targetOffsetNext
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targetOffsetNext="$(mapOffset relTargetOffset)"
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# Once again, ensure we're in bounds relative to the
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# package currently being built.
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[[ "${allPlatOffsets[*]}" = *"$targetOffsetNext"* ]] || continue
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[[ -f "$pkg/nix-support/$file" ]] || continue
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local pkgNext
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for pkgNext in $(< "$pkg/nix-support/$file"); do
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findInputs "$pkgNext" "$hostOffsetNext" "$targetOffsetNext"
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done
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done
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done
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}
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# Make sure all are at least defined as empty
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: ${depsBuildBuild=} ${depsBuildBuildPropagated=}
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: ${nativeBuildInputs=} ${propagatedNativeBuildInputs=} ${defaultNativeBuildInputs=}
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: ${depsBuildTarget=} ${depsBuildTargetPropagated=}
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: ${depsHostHost=} ${depsHostHostPropagated=}
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: ${buildInputs=} ${propagatedBuildInputs=} ${defaultBuildInputs=}
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: ${depsTargetTarget=} ${depsTargetTargetPropagated=}
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for pkg in $depsBuildBuild $depsBuildBuildPropagated; do
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findInputs "$pkg" -1 -1
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done
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for pkg in $nativeBuildInputs $propagatedNativeBuildInputs; do
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findInputs "$pkg" -1 0
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done
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for pkg in $depsBuildTarget $depsBuildTargetPropagated; do
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findInputs "$pkg" -1 1
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done
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for pkg in $depsHostHost $depsHostHostPropagated; do
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findInputs "$pkg" 0 0
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done
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for pkg in $buildInputs $propagatedBuildInputs ; do
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findInputs "$pkg" 0 1
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done
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for pkg in $depsTargetTarget $depsTargetTargetPropagated; do
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findInputs "$pkg" 1 1
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done
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# Default inputs must be processed last
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for pkg in $defaultNativeBuildInputs; do
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findInputs "$pkg" -1 0
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done
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for pkg in $defaultBuildInputs; do
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findInputs "$pkg" 0 1
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done
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# Add package to the future PATH and run setup hooks
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activatePackage() {
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local pkg="$1"
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local -ri hostOffset="$2"
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local -ri targetOffset="$3"
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# Sanity check
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(( "$hostOffset" <= "$targetOffset" )) || exit -1
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if [ -f "$pkg" ]; then
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local oldOpts="$(shopt -po nounset)"
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@ -347,11 +493,16 @@ activatePackage() {
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eval "$oldOpts"
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fi
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if [ -d "$pkg/bin" ]; then
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# Only dependencies whose host platform is guaranteed to match the
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# build platform are included here. That would be `depsBuild*`,
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# and legacy `nativeBuildInputs`. Other aren't because of cross
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# compiling, and we want to have consistent rules whether or not
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# we are cross compiling.
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if [[ "$hostOffset" -le -1 && -d "$pkg/bin" ]]; then
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addToSearchPath _PATH "$pkg/bin"
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fi
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if [ -f "$pkg/nix-support/setup-hook" ]; then
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if [[ -f "$pkg/nix-support/setup-hook" ]]; then
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local oldOpts="$(shopt -po nounset)"
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set +u
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source "$pkg/nix-support/setup-hook"
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@ -359,67 +510,55 @@ activatePackage() {
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fi
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}
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declare -a nativePkgs crossPkgs
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if [ -z "${crossConfig:-}" ]; then
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# Not cross-compiling - both buildInputs (and variants like propagatedBuildInputs)
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# are handled identically to nativeBuildInputs
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for i in ${nativeBuildInputs:-} ${buildInputs:-} \
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${defaultNativeBuildInputs:-} ${defaultBuildInputs:-} \
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${propagatedNativeBuildInputs:-} ${propagatedBuildInputs:-}; do
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findInputs "$i" nativePkgs propagated-native-build-inputs propagated-build-inputs
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done
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else
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for i in ${nativeBuildInputs:-} ${defaultNativeBuildInputs:-} ${propagatedNativeBuildInputs:-}; do
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findInputs "$i" nativePkgs propagated-native-build-inputs
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done
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for i in ${buildInputs:-} ${defaultBuildInputs:-} ${propagatedBuildInputs:-}; do
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findInputs "$i" crossPkgs propagated-build-inputs
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done
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fi
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_activatePkgs() {
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local -i hostOffset targetOffset
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local pkg
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for i in ${nativePkgs+"${nativePkgs[@]}"} ${crossPkgs+"${crossPkgs[@]}"}; do
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activatePackage "$i"
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done
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for hostOffset in "${allPlatOffsets[@]}"; do
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local pkgsVar="${pkgAccumVarVars[$hostOffset + 1]}"
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for targetOffset in "${allPlatOffsets[@]}"; do
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(( "$hostOffset" <= "$targetOffset" )) || continue
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local pkgsRef="${pkgsVar}[$targetOffset - $hostOffset]"
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local pkgsSlice="${!pkgsRef}[@]"
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for pkg in ${!pkgsSlice+"${!pkgsSlice}"}; do
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activatePackage "$pkg" "$hostOffset" "$targetOffset"
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done
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done
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done
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}
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# Run the package setup hooks and build _PATH
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_activatePkgs
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# Set the relevant environment variables to point to the build inputs
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# found above.
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#
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# These `depOffset`s tell the env hook what sort of dependency
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# (ignoring propagatedness) is being passed to the env hook. In a real
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# language, we'd append a closure with this information to the
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# relevant env hook array, but bash doesn't have closures, so it's
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# easier to just pass this in.
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# These `depOffset`s, beyond indexing the arrays, also tell the env
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# hook what sort of dependency (ignoring propagatedness) is being
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# passed to the env hook. In a real language, we'd append a closure
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# with this information to the relevant env hook array, but bash
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# doesn't have closures, so it's easier to just pass this in.
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_addToEnv() {
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local -i depHostOffset depTargetOffset
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local pkg
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_addToNativeEnv() {
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local pkg="$1"
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if [[ -n "${crossConfig:-}" ]]; then
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local -i depOffset=-1
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else
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local -i depOffset=0
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fi
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# Run the package-specific hooks set by the setup-hook scripts.
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runHook envHook "$pkg"
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for depHostOffset in "${allPlatOffsets[@]}"; do
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local hookVar="${pkgHookVarVars[$depHostOffset + 1]}"
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local pkgsVar="${pkgAccumVarVars[$depHostOffset + 1]}"
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for depTargetOffset in "${allPlatOffsets[@]}"; do
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(( "$depHostOffset" <= "$depTargetOffset" )) || continue
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local hookRef="${hookVar}[$depTargetOffset - $depHostOffset]"
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local pkgsRef="${pkgsVar}[$depTargetOffset - $depHostOffset]"
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local pkgsSlice="${!pkgsRef}[@]"
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for pkg in ${!pkgsSlice+"${!pkgsSlice}"}; do
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runHook "${!hookRef}" "$pkg"
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done
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done
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done
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}
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# Old bash empty array hack
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for i in ${nativePkgs+"${nativePkgs[@]}"}; do
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_addToNativeEnv "$i"
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done
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_addToCrossEnv() {
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local pkg="$1"
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local -i depOffset=0
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# Run the package-specific hooks set by the setup-hook scripts.
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runHook crossEnvHook "$pkg"
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}
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# Old bash empty array hack
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for i in ${crossPkgs+"${crossPkgs[@]}"}; do
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_addToCrossEnv "$i"
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done
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# Run the package-specific hooks set by the setup-hook scripts.
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_addToEnv
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_addRpathPrefix "$out"
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@ -882,6 +1021,7 @@ installPhase() {
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# propagated-build-inputs.
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fixupPhase() {
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# Make sure everything is writable so "strip" et al. work.
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local output
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for output in $outputs; do
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if [ -e "${!output}" ]; then chmod -R u+w "${!output}"; fi
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done
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@ -895,19 +1035,35 @@ fixupPhase() {
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done
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||||
# Propagate build inputs and setup hook into the development output.
|
||||
# Propagate dependencies & setup hook into the development output.
|
||||
declare -ra flatVars=(
|
||||
# Build
|
||||
depsBuildBuildPropagated
|
||||
propagatedNativeBuildInputs
|
||||
depsBuildTargetPropagated
|
||||
# Host
|
||||
depsHostHostPropagated
|
||||
propagatedBuildInputs
|
||||
# Target
|
||||
depsTargetTargetPropagated
|
||||
)
|
||||
declare -ra flatFiles=(
|
||||
"${propagatedBuildDepFiles[@]}"
|
||||
"${propagatedHostDepFiles[@]}"
|
||||
"${propagatedTargetDepFiles[@]}"
|
||||
)
|
||||
|
||||
local propagatedInputsIndex
|
||||
for propagatedInputsIndex in "${!flatVars[@]}"; do
|
||||
local propagatedInputsSlice="${flatVars[$propagatedInputsIndex]}[@]"
|
||||
local propagatedInputsFile="${flatFiles[$propagatedInputsIndex]}"
|
||||
|
||||
[[ "${!propagatedInputsSlice}" ]] || continue
|
||||
|
||||
if [ -n "${propagatedBuildInputs:-}" ]; then
|
||||
mkdir -p "${!outputDev}/nix-support"
|
||||
# shellcheck disable=SC2086
|
||||
printWords $propagatedBuildInputs > "${!outputDev}/nix-support/propagated-build-inputs"
|
||||
fi
|
||||
|
||||
if [ -n "${propagatedNativeBuildInputs:-}" ]; then
|
||||
mkdir -p "${!outputDev}/nix-support"
|
||||
# shellcheck disable=SC2086
|
||||
printWords $propagatedNativeBuildInputs > "${!outputDev}/nix-support/propagated-native-build-inputs"
|
||||
fi
|
||||
printWords ${!propagatedInputsSlice} > "${!outputDev}/nix-support/$propagatedInputsFile"
|
||||
done
|
||||
|
||||
|
||||
if [ -n "${setupHook:-}" ]; then
|
||||
|
||||
Loading…
Reference in New Issue
Block a user