claude is gud

1 files changed, 127 insertions, 0 deletions

diff --git a/vere/flake.nix b/vere/flake.nix
new file mode 100644
index 0000000..0523728
--- /dev/null
+++ b/vere/flake.nix
@@ -0,0 +1,127 @@
+{
+  description = "Vere build devshell";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    parts = {
+      url = "github:hercules-ci/flake-parts";
+      inputs.nixpkgs-lib.follows = "nixpkgs";
+    };
+  };
+
+  outputs = inputs@{ self, nixpkgs, parts }: parts.lib.mkFlake { inherit inputs; } (let
+    # map systems to the musl-cross-make target names; only
+    # x86_64-linux is tested though
+    toolchainTargets = {
+      "x86_64-linux" = "x86_64-linux-musl";
+      "aarch64-linux" = "aarch64-linux-musl";
+    };
+    # map dep urls to hashes
+    toolchainDeps = {
+      "https://ftpmirror.gnu.org/gnu/gcc/gcc-9.4.0/gcc-9.4.0.tar.xz" = "13l3p6g2krilaawbapmn9zmmrh3zdwc36mfr3msxfy038hps6pf9";
+      "https://ftpmirror.gnu.org/gnu/binutils/binutils-2.33.1.tar.xz" = "1grcf8jaw3i0bk6f9xfzxw3qfgmn6fgkr108isdkbh1y3hnzqrmb";
+      "https://musl.libc.org/releases/musl-1.2.3.tar.gz" = "196lrzw0qy5axiz9p5ay50q2mls8hbfckr4rw0klc7jjc9h0nnvx";
+      "https://ftpmirror.gnu.org/gnu/gmp/gmp-6.1.2.tar.bz2" = "1clg7pbpk6qwxj5b2mw0pghzawp2qlm3jf9gdd8i6fl6yh2bnxaj";
+      "https://ftpmirror.gnu.org/gnu/mpc/mpc-1.1.0.tar.gz" = "0biwnhjm3rx3hc0rfpvyniky4lpzsvdcwhmcn7f0h4iw2hwcb1b9";
+      "https://ftpmirror.gnu.org/gnu/mpfr/mpfr-4.0.2.tar.bz2" = "1k1s4p56272bggvyrxfn3zdycr4wy7h5ipac70cr03lys013ypn0";
+      "http://ftp.barfooze.de/pub/sabotage/tarballs//linux-headers-4.19.88-1.tar.xz" = "04r8k4ckqbklx9sfm07cr7vfw5ra4cic0rzanm9dfh0crxncfnwr";
+      "http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=3d5db9ebe860" = "75d5d255a2a273b6e651f82eecfabf6cbcd8eaeae70e86b417384c8f4a58d8d3";
+    };
+  in {
+    systems = builtins.attrNames toolchainTargets;
+
+    flake = {};
+
+    perSystem = { pkgs, system, ... }: let
+      target = toolchainTargets.${system};
+
+      # in order to make the toolchain derivation pure, spoof `wget`
+      # to use FODs for the dependencies that would otherwise be
+      # downloaded
+      pseudoWget = let
+        c = pkgs.coreutils;
+      in pkgs.writeScriptBin "wget" ''
+        #!${pkgs.stdenv.shell}
+
+        declare -A targets
+        ${builtins.concatStringsSep "\n"
+          (builtins.map (url:
+            "targets[${nixpkgs.lib.escapeShellArg url}]=" + (nixpkgs.lib.escapeShellArg (pkgs.fetchurl {
+              inherit url;
+              sha256 = builtins.getAttr url toolchainDeps;
+            })))
+            (builtins.attrNames toolchainDeps))}
+
+        # -c -O target url
+        target="$3"
+        url="$4"
+        preFetched=${"$" + "{targets[$url]}"}
+        if [[ -z "$preFetched" ]]; then
+          ${c}/bin/echo 1>&2 "$target ($url) is new or changed, nix-prefetch-url it and add or update the url and hash in toolchainDeps in flake.nix"
+          exit 1
+        fi
+        ${c}/bin/cp --reflink=auto "$preFetched" "$target"
+      '';
+
+      toolchain = let
+        # keep in sync with `_musl_cross_make_version` in
+        # bazel/toolchain/BUILD.bazel
+        version = "fe915821b652a7fa37b34a596f47d8e20bc72338";
+
+        # `-g -O2` are the defaults (there's no way to add cflags via
+        # config.mak), `-Wno-format-security` is the interesting
+        # addition (without which gcc build fails in several places
+        # due to `-Werror=format-security` being on for some reason)
+        commonCFLAGS = "-g -O2 -Wno-format-security";
+      in pkgs.stdenv.mkDerivation {
+        name = "musl-cross-make";
+        inherit system version;
+        src = pkgs.fetchFromGitHub {
+          owner = "richfelker";
+          repo = "musl-cross-make";
+          rev = version;
+          sha256 = "sha256-FthfhZ+qGf2nWLICvjaO8fiP5+PYU7PqFCbPwXmJFes=";
+        };
+
+        nativeBuildInputs = [
+          pseudoWget
+        ];
+
+        enableParallelBuilding = true;
+        configurePhase = ''
+          cat > config.mak <<EOF
+          TARGET = ${target}
+          OUTPUT = $out
+          COMMON_CONFIG += CFLAGS="${commonCFLAGS}" CXXFLAGS="${commonCFLAGS}"
+          EOF
+        '';
+      };
+    in {
+      devShells.default = (pkgs.buildFHSUserEnvBubblewrap {
+        name = "vere-devenv";
+        targetPkgs = pkgs: [
+          toolchain
+        ]
+        ++ (with pkgs; [
+          autoconf
+          autoconf-archive
+          automake
+          bazel_6
+          binutils # for `nm`
+          jdk11_headless
+          libtool
+          m4
+          pkg-config
+          git
+          perl
+        ]);
+        extraBuildCommands = ''
+          chmod +w usr
+          mkdir -p usr/local
+          # symlinking breaks Bazel inclusion checks, so have to copy
+          cp -a --reflink=auto ${toolchain} usr/local/${target}
+        '';
+      }).env;
+    };
+  });
+}