Nix on ARM

Initial

A prebuilt nix installer for armv7l including instruction on how to build it yourself via docker can be found here: github.com/DavHau/nix-on-armv7l

For some more info on, for example, binary caches, check also: https://nixos.wiki/wiki/NixOS_on_ARM

In case this helps anyone - by modifying Nix's `release.nix` you can make your own ARMv7 installer. (This is outdated and doesn't work anymore. At least not without additional modifications)

{ nix ? builtins.fetchGit ./.
, nixpkgs ? <nixpkgs> #builtins.fetchGit { url = https://github.com/NixOS/nixpkgs-channels.git; ref = "nixos-18.03"; }
, officialRelease ? false
, systems ? [ "armv7l-linux" ]
}:

let

  pkgs = import nixpkgs { system = builtins.currentSystem or "x86_64-linux"; };

  jobs = rec {


    tarball =
      with pkgs;

      with import ./release-common.nix { inherit pkgs; };

      releaseTools.sourceTarball {
        name = "nix-tarball";
        version = builtins.readFile ./.version;
        versionSuffix = if officialRelease then "" else "pre${toString nix.revCount}_${nix.shortRev}";
        src = nix;
        inherit officialRelease;

        buildInputs = tarballDeps ++ buildDeps ++ propagatedDeps;

        configureFlags = "--enable-gc";

        postUnpack = ''
          (cd source && find . -type f) | cut -c3- > source/.dist-files
          cat source/.dist-files
        '';

        preConfigure = ''
          (cd perl ; autoreconf --install --force --verbose)
          # TeX needs a writable font cache.
          export VARTEXFONTS=$TMPDIR/texfonts
        '';

        distPhase =
          ''
            runHook preDist
            make dist
            mkdir -p $out/tarballs
            cp *.tar.* $out/tarballs
          '';

        preDist = ''
          make install docdir=$out/share/doc/nix makefiles=doc/manual/local.mk
          echo "doc manual $out/share/doc/nix/manual" >> $out/nix-support/hydra-build-products
        '';
      };


    build = pkgs.lib.genAttrs systems (system:

      let pkgs = import nixpkgs { inherit system; }; in

      with pkgs;

      with import ./release-common.nix { inherit pkgs; };

      releaseTools.nixBuild {
        name = "nix";
        src = tarball;

        buildInputs = buildDeps;
        propagatedBuildInputs = propagatedDeps;

        configureFlags = configureFlags ++
          [ "--sysconfdir=/etc" ];

        enableParallelBuilding = true;

        makeFlags = "profiledir=$(out)/etc/profile.d";

        preBuild = "unset NIX_INDENT_MAKE";

        installFlags = "sysconfdir=$(out)/etc";

        doInstallCheck = true;
        installCheckFlags = "sysconfdir=$(out)/etc";
      });


    perlBindings = pkgs.lib.genAttrs systems (system:

      let pkgs = import nixpkgs { inherit system; }; in with pkgs;

      releaseTools.nixBuild {
        name = "nix-perl";
        src = tarball;

        buildInputs =
          [ jobs.build.${system} curl bzip2 xz pkg-config pkgs.perl boost ]
          ++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium;

        configureFlags = ''
          --with-dbi=${perlPackages.DBI}/${pkgs.perl.libPrefix}
          --with-dbd-sqlite=${perlPackages.DBDSQLite}/${pkgs.perl.libPrefix}
        '';

        enableParallelBuilding = true;

        postUnpack = "sourceRoot=$sourceRoot/perl";

        preBuild = "unset NIX_INDENT_MAKE";
      });


    binaryTarball = pkgs.lib.genAttrs systems (system:

      with import nixpkgs { inherit system; };

      let
        toplevel = builtins.getAttr system jobs.build;
        version = toplevel.src.version;
        installerClosureInfo = closureInfo { rootPaths = [ toplevel cacert ]; };
      in

      runCommand "nix-binary-tarball-${version}"
        { nativeBuildInputs = lib.optional (system != "armv7l-linux") shellcheck;
          meta.description = "Distribution-independent Nix bootstrap binaries for ${system}";
        }
        ''
          cp ${installerClosureInfo}/registration $TMPDIR/reginfo
          substitute ${./scripts/install-nix-from-closure.sh} $TMPDIR/install \
            --subst-var-by nix ${toplevel} \
            --subst-var-by cacert ${cacert}

          substitute ${./scripts/install-darwin-multi-user.sh} $TMPDIR/install-darwin-multi-user.sh \
            --subst-var-by nix ${toplevel} \
            --subst-var-by cacert ${cacert}
          substitute ${./scripts/install-systemd-multi-user.sh} $TMPDIR/install-systemd-multi-user.sh \
            --subst-var-by nix ${toplevel} \
            --subst-var-by cacert ${cacert}
          substitute ${./scripts/install-multi-user.sh} $TMPDIR/install-multi-user \
            --subst-var-by nix ${toplevel} \
            --subst-var-by cacert ${cacert}

          if type -p shellcheck; then
            # SC1090: Don't worry about not being able to find
            #         $nix/etc/profile.d/nix.sh
            shellcheck --exclude SC1090 $TMPDIR/install
            shellcheck $TMPDIR/install-darwin-multi-user.sh
            shellcheck $TMPDIR/install-systemd-multi-user.sh

            # SC1091: Don't panic about not being able to source
            #         /etc/profile
            # SC2002: Ignore "useless cat" "error", when loading
            #         .reginfo, as the cat is a much cleaner
            #         implementation, even though it is "useless"
            # SC2116: Allow ROOT_HOME=$(echo ~root) for resolving
            #         root's home directory
            shellcheck --external-sources \
              --exclude SC1091,SC2002,SC2116 $TMPDIR/install-multi-user
          fi

          chmod +x $TMPDIR/install
          chmod +x $TMPDIR/install-darwin-multi-user.sh
          chmod +x $TMPDIR/install-systemd-multi-user.sh
          chmod +x $TMPDIR/install-multi-user
          dir=nix-${version}-${system}
          fn=$out/$dir.tar.bz2
          mkdir -p $out/nix-support
          echo "file binary-dist $fn" >> $out/nix-support/hydra-build-products
          tar cvfj $fn \
            --owner=0 --group=0 --mode=u+rw,uga+r \
            --absolute-names \
            --hard-dereference \
            --transform "s,$TMPDIR/install,$dir/install," \
            --transform "s,$TMPDIR/reginfo,$dir/.reginfo," \
            --transform "s,$NIX_STORE,$dir/store,S" \
            $TMPDIR/install $TMPDIR/install-darwin-multi-user.sh \
            $TMPDIR/install-systemd-multi-user.sh \
            $TMPDIR/install-multi-user $TMPDIR/reginfo \
            $(cat ${installerClosureInfo}/store-paths)
        '');


    coverage =
      with pkgs;

      with import ./release-common.nix { inherit pkgs; };

      releaseTools.coverageAnalysis {
        name = "nix-build";
        src = tarball;

        buildInputs = buildDeps;
        propagatedBuildInputs = propagatedDeps;

        configureFlags = ''
          --disable-init-state
        '';

        dontInstall = false;

        doInstallCheck = true;

        lcovFilter = [ "*/boost/*" "*-tab.*" "*/nlohmann/*" "*/linenoise/*" ];

        # We call `dot', and even though we just use it to
        # syntax-check generated dot files, it still requires some
        # fonts.  So provide those.
        FONTCONFIG_FILE = texFunctions.fontsConf;
      };

    # Aggregate job containing the release-critical jobs.
    release = pkgs.releaseTools.aggregate {
      name = "nix-${tarball.version}";
      meta.description = "Release-critical builds";
      constituents =
        [ tarball
          build.armv7l-linux
        ];
    };

  };

in jobs