add x86_64 arch

.github/workflows/cachix.yml

@@ -27,5 +27,5 @@ jobs:
             --log-format bar-with-logs \
             --option keep-going true \
             --show-trace \
-            build .#bootstrapZip \
+            build .#bootstrapZip-aarch64 .#bootstrapZip-x86_64 \
             --impure

README.md

@@ -136,7 +136,7 @@ Get an x86_64 computer with flake-enabled Nix.
 Run
 
 ```sh
-nix build ".#bootstrapZip" --impure
+nix build ".#bootstrapZip-aarch64" --impure
 ```
 
 Put the zip file from `result` on some HTTP server
@@ -192,6 +192,7 @@ A minimal example could look like the following:
   outputs = { self, nixpkgs, nix-on-droid }: {
 
     nixOnDroidConfigurations.default = nix-on-droid.lib.nixOnDroidConfiguration {
+      system = "aarch64-linux";
       modules = [ ./nix-on-droid.nix ];
     };
 

flake.nix

@@ -33,8 +33,8 @@
 
       overlay = nixpkgs.lib.composeManyExtensions (import ./overlays);
 
-      pkgs' = import nixpkgs {
-        system = "aarch64-linux";
+      pkgsPerSystem = system: import nixpkgs {
+        inherit system;
         overlays = [ overlay ];
       };
 
@@ -75,16 +75,18 @@
 
       lib.nixOnDroidConfiguration =
         { modules ? [ ]
+        , system ? "aarch64-linux"
         , extraSpecialArgs ? { }
-        , pkgs ? pkgs'
+        , pkgs ? pkgsPerSystem system
         , home-manager-path ? home-manager.outPath
           # deprecated:
         , config ? null
         , extraModules ? null
-        , system ? null
         }:
-        if pkgs.system != "aarch64-linux" then
-          throw "aarch64-linux is the only currently supported system type"
+        if ! (builtins.elem system [ "aarch64-linux" "x86_64-linux" ]) then
+          throw
+            ("${system} is not supported; aarch64-linux / x86_64-linux " +
+              "are the only currently supported system types")
         else
           pkgs.lib.throwIf
             (config != null || extraModules != null)
@@ -102,6 +104,8 @@
             (import ./modules {
               inherit extraSpecialArgs home-manager-path pkgs;
               config.imports = modules;
+              config.build.arch =
+                nixpkgs.lib.strings.removeSuffix "-linux" system;
               isFlake = true;
             });
 
@@ -109,10 +113,17 @@
 
       packages = forEachSystem (system:
         let
-          nixOnDroidPkgs = import ./pkgs {
-            inherit system;
+          flattenArch = arch: derivationAttrset:
+            nixpkgs.lib.attrsets.mapAttrs'
+              (name: drv:
+                nixpkgs.lib.attrsets.nameValuePair (name + "-" + arch) drv
+              )
+              derivationAttrset;
+          perArchCustomPkgs = arch: flattenArch arch
+            (import ./pkgs {
+              inherit system arch;
               nixpkgs = nixpkgs-for-bootstrap;
-          };
+            }).customPkgs;
 
           docs = import ./docs {
             inherit home-manager;
@@ -123,7 +134,8 @@
         {
           nix-on-droid = nixpkgs.legacyPackages.${system}.callPackage ./nix-on-droid { };
         }
-        // nixOnDroidPkgs.customPkgs
+        // (perArchCustomPkgs "aarch64")
+        // (perArchCustomPkgs "x86_64")
         // docs
       );
 

modules/build/config.nix

@@ -1,4 +1,4 @@
-# Copyright (c) 2019-2023, see AUTHORS. Licensed under MIT License, see LICENSE.
+# Copyright (c) 2019-2024, see AUTHORS. Licensed under MIT License, see LICENSE.
 
 { config, lib, pkgs, ... }:
 
@@ -12,8 +12,8 @@ with lib;
 
     build = {
       arch = mkOption {
-        type = types.enum [ "aarch64" ];
-        default = "aarch64";
+        type = types.enum [ "aarch64" "x86_64" ];
+        default = strings.removeSuffix "-linux" builtins.currentSystem;
         internal = true;
         description = "Destination arch.";
       };

modules/environment/login/default.nix

@@ -1,4 +1,4 @@
-# Copyright (c) 2019-2023, see AUTHORS. Licensed under MIT License, see LICENSE.
+# Copyright (c) 2019-2024, see AUTHORS. Licensed under MIT License, see LICENSE.
 
 { config, lib, pkgs, initialPackageInfo, ... }:
 
@@ -82,7 +82,14 @@ in
     environment.files = {
       inherit login loginInner;
 
-      prootStatic = "/nix/store/7w09z1kw62wg7nv3q3z2p6kxf1ihk178-proot-termux-static-aarch64-unknown-linux-android-unstable-2023-11-11";
+      prootStatic =
+        let
+          crossCompiledPaths = {
+            aarch64 = "/nix/store/7w09z1kw62wg7nv3q3z2p6kxf1ihk178-proot-termux-static-aarch64-unknown-linux-android-unstable-2023-11-11";
+            x86_64 = "/nix/store/i6jppi627sakbgm5x2a8jjdfyv8571zc-proot-termux-static-x86_64-unknown-linux-android-unstable-2023-11-11";
+          };
+        in
+        "${crossCompiledPaths.${config.build.arch}}";
     };
 
   };

modules/environment/login/login-inner.nix

@@ -1,4 +1,4 @@
-# Copyright (c) 2019-2023, see AUTHORS. Licensed under MIT License, see LICENSE.
+# Copyright (c) 2019-2024, see AUTHORS. Licensed under MIT License, see LICENSE.
 
 { config, lib, initialPackageInfo, writeText }:
 
@@ -80,9 +80,10 @@ writeText "login-inner" ''
         ${nixCmd} flake new ${config.user.home}/.config/nix-on-droid --template ${config.build.flake.nix-on-droid}
 
         ${lib.optionalString config.build.flake.inputOverrides ''
-          echo "Overriding input urls in flake..."
+          echo "Overriding input urls / arch in flake..."
           ${nixCmd} run nixpkgs#gnused -- \
             -i \
+            -e 's,\"aarch64-linux",\"${config.build.arch}-linux\",' \
             -e 's,\"github:NixOS/nixpkgs.*\",\"${config.build.flake.nixpkgs}\",' \
             -e 's,\"github:nix-community/nix-on-droid.*\",\"${config.build.flake.nix-on-droid}\",' \
             "${config.user.home}/.config/nix-on-droid/flake.nix"

pkgs/default.nix

@@ -41,7 +41,10 @@ let
       user.shell = "${initialPackageInfo.bash}/bin/bash";
 
       build = {
-        inherit arch;
+        arch =
+          if arch != null
+          then arch
+          else nixpkgs.lib.strings.removeSuffix "-linux" builtins.currentSystem;
 
         channel = {
           nixpkgs = urlOptionValue nixpkgsChannelURL "NIXPKGS_CHANNEL_URL";

pkgs/nix-directory.nix

@@ -25,7 +25,14 @@ stdenv.mkDerivation {
 
   src = builtins.fetchurl {
     url = "https://nixos.org/releases/nix/nix-2.20.5/nix-2.20.5-${config.build.arch}-linux.tar.xz";
-    sha256 = "sha256:168wjfj3xsc8hq1y6cq59iipjp1g9hmj4n5wdn9c47ad9gbc9cvh";
+    sha256 =
+      let
+        archShas = {
+          aarch64 = "sha256:168wjfj3xsc8hq1y6cq59iipjp1g9hmj4n5wdn9c47ad9gbc9cvh";
+          x86_64 = "sha256:0dax9n562ldj53ap6lz0cwwsfx4d8j1267g9s6lg3zs237yyzw61";
+        };
+      in
+      archShas.${config.build.arch};
   };
 
   PROOT_NO_SECCOMP = 1; # see https://github.com/proot-me/PRoot/issues/106

scripts/deploy.sh

@@ -23,6 +23,7 @@ fi
 
 PUBLIC_URL="$1"
 RSYNC_TARGET="$2"
+: ${ARCHES:=aarch64 x86_64}
 
 # this allows to run this script from every place in this git repo
 REPO_DIR="$(git rev-parse --show-toplevel)"
@@ -54,27 +55,35 @@ log "NIX_ON_DROID_CHANNEL_URL=$NIX_ON_DROID_CHANNEL_URL"
 log "NIX_ON_DROID_FLAKE_URL=$NIX_ON_DROID_FLAKE_URL"
 
 
-log "building proot..."
-PROOT="$(nix build --no-link --print-out-paths ".#prootTermux")"
-
-
 PROOT_HASH_FILE="modules/environment/login/default.nix"
-log "patching proot path in $PROOT_HASH_FILE..."
-grep "prootStatic = \"/nix/store/" "$PROOT_HASH_FILE"
-sed -i "s|prootStatic = \"/nix/store/.*\";|prootStatic = \"$PROOT\";|" "$PROOT_HASH_FILE"
-grep "prootStatic = \"/nix/store/" "$PROOT_HASH_FILE"
+UPLOADS=()
+for arch in $ARCHES; do
+    log "building $arch proot..."
+    proot="$(nix build --no-link --print-out-paths ".#prootTermux-${arch}")"
 
+    if grep -q "$arch = \"$proot\";" "$PROOT_HASH_FILE"; then
+        log "keeping $arch proot path in $PROOT_HASH_FILE"
+    elif grep -q "$arch = \"/nix/store/" "$PROOT_HASH_FILE"; then
+        log "patching $arch proot path in $PROOT_HASH_FILE..."
+        grep "$arch = \"/nix/store/" "$PROOT_HASH_FILE"
+        sed -i "s|$arch = \"/nix/store/.*\";|$arch = \"$proot\";|" "$PROOT_HASH_FILE"
+        log "            ->"
+        grep "$arch = \"/nix/store/" "$PROOT_HASH_FILE"
+    else
+        log "no $arch proot hash found in $PROOT_HASH_FILE!"
+        exit 1
+    fi
 
-log "building bootstrapZip..."
-BOOTSTRAP_ZIP="$(nix build --no-link --print-out-paths --impure ".#bootstrapZip")"
+    log "building $arch bootstrapZip..."
+    BOOTSTRAP_ZIP="$(nix build --no-link --print-out-paths --impure ".#bootstrapZip-${arch}")"
+    UPLOADS+=($BOOTSTRAP_ZIP/bootstrap-$arch.zip)
+done
 
 
 log "creating tar ball of current HEAD..."
 git archive --prefix nix-on-droid/ --output "$SOURCE_FILE" HEAD
+UPLOADS+=($SOURCE_FILE)
 
 
 log "uploading artifacts..."
-rsync --progress \
-    "$SOURCE_FILE" \
-    "$BOOTSTRAP_ZIP/bootstrap-aarch64.zip" \
-    "$RSYNC_TARGET"
+rsync --progress "${UPLOADS[@]}" "$RSYNC_TARGET"

templates/minimal/flake.nix

@@ -13,6 +13,7 @@
   outputs = { self, nixpkgs, nix-on-droid }: {
 
     nixOnDroidConfigurations.default = nix-on-droid.lib.nixOnDroidConfiguration {
+      system = "aarch64-linux";
       modules = [ ./nix-on-droid.nix ];
     };
 

tests/on-device/config-flake-default.nix

@@ -10,6 +10,7 @@
   outputs = { nix-on-droid, ... }: {
     nixOnDroidConfigurations = {
       default = nix-on-droid.lib.nixOnDroidConfiguration {
+        system = "<<SYSTEM>>";
         modules = [ ./nix-on-droid.nix ];
       };
     };

tests/on-device/config-flake-h-m.bats

@@ -10,7 +10,7 @@ load lib
   # set up / build / activate the configuration
   cat "$ON_DEVICE_TESTS_DIR/config-flake-h-m.cfg.nix" \
     > ~/.config/nixpkgs/nix-on-droid.nix
-  _sed "s|<<FLAKE_URL>>|$FLAKE_URL|g" \
+  _sed -e "s|<<FLAKE_URL>>|$FLAKE_URL|g" -e "s|<<SYSTEM>>|$(detect_system)|g" \
     "$ON_DEVICE_TESTS_DIR/config-flake-h-m.flake.nix" \
     > ~/.config/nixpkgs/flake.nix
 

tests/on-device/config-flake-h-m.flake.nix

@@ -14,6 +14,7 @@
   outputs = { nix-on-droid, ... }: {
     nixOnDroidConfigurations = {
       device = nix-on-droid.lib.nixOnDroidConfiguration {
+        system = "<<SYSTEM>>";
         modules = [ ./nix-on-droid.nix ];
       };
     };

tests/on-device/config-flake-hosts.bats

@@ -6,7 +6,7 @@ load lib
   # set up / build / activate the configuration
   cat "$ON_DEVICE_TESTS_DIR/config-flake-hosts.cfg.nix" \
     > ~/.config/nixpkgs/nix-on-droid.nix
-  _sed "s|<<FLAKE_URL>>|$FLAKE_URL|g" \
+  _sed -e "s|<<FLAKE_URL>>|$FLAKE_URL|g" -e "s|<<SYSTEM>>|$(detect_system)|g" \
     "$ON_DEVICE_TESTS_DIR/config-flake.nix" \
     > ~/.config/nixpkgs/flake.nix
 
@@ -27,7 +27,7 @@ load lib
   # set up / build / activate the configuration
   cat "$ON_DEVICE_TESTS_DIR/config-flake-hosts-localhost.cfg.nix" \
     > ~/.config/nixpkgs/nix-on-droid.nix
-  _sed "s|<<FLAKE_URL>>|$FLAKE_URL|g" \
+  _sed -e "s|<<FLAKE_URL>>|$FLAKE_URL|g" -e "s|<<SYSTEM>>|$(detect_system)|g" \
     "$ON_DEVICE_TESTS_DIR/config-flake.nix" \
     > ~/.config/nixpkgs/flake.nix
 

tests/on-device/config-flake.bats

@@ -17,7 +17,7 @@ function flake_example() {
     "$CHANNEL_DIR/modules/environment/login/nix-on-droid.nix.default" \
     > ~/.config/nixpkgs/nix-on-droid.nix
 
-  _sed "s|<<FLAKE_URL>>|$FLAKE_URL|g" \
+  _sed -e "s|<<FLAKE_URL>>|$FLAKE_URL|g" -e "s|<<SYSTEM>>|$(detect_system)|g" \
     "$ON_DEVICE_TESTS_DIR/$flake_file_name" \
     > ~/.config/nixpkgs/flake.nix
 

tests/on-device/config-flake.nix

@@ -10,6 +10,7 @@
   outputs = { nix-on-droid, ... }: {
     nixOnDroidConfigurations = {
       device = nix-on-droid.lib.nixOnDroidConfiguration {
+        system = "<<SYSTEM>>";
         modules = [ ./nix-on-droid.nix ];
       };
     };

tests/on-device/lib.bash

@@ -71,3 +71,8 @@ _diff() {
   storePath="$(nix-build "<nixpkgs>" --no-out-link --attr diffutils)"
   "${storePath}/bin/diff" "$@"
 }
+
+detect_system() {
+  nix --experimental-features nix-command \
+      eval --impure --raw --expr 'builtins.currentSystem'
+}