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-rw-r--r--third_party/default.nix175
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diff --git a/third_party/default.nix b/third_party/default.nix
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+# This file controls the import of external dependencies (i.e.
+# third-party code) into my package tree.
+#
+# This includes *all packages needed from nixpkgs*.
+{ ... }:
+
+let
+  # Tracking nixos-unstable as of 2020-05-21.
+  nixpkgsCommit = "0f5ce2fac0c726036ca69a5524c59a49e2973dd4";
+  nixpkgsSrc = fetchTarball {
+    url = "https://github.com/NixOS/nixpkgs-channels/archive/${nixpkgsCommit}.tar.gz";
+    sha256 = "0nkk492aa7pr0d30vv1aw192wc16wpa1j02925pldc09s9m9i0r3";
+  };
+  nixpkgs = import nixpkgsSrc {
+    config.allowUnfree = true;
+    config.allowBroken = true;
+  };
+
+  # Tracking nixos-20.03 as of 2020-05-22
+  stableCommit = "48723f48ab92381f0afd50143f38e45cf3080405";
+  stableNixpkgsSrc = fetchTarball {
+    url = "https://github.com/NixOS/nixpkgs-channels/archive/${stableCommit}.tar.gz";
+    sha256 = "0h3b3l867j3ybdgimfn76lw7w6yjhszd5x02pq5827l659ihcf53";
+  };
+  stableNixpkgs = import stableNixpkgsSrc {};
+
+  exposed = {
+    # Inherit the packages from nixos-usntable that should be available inside
+    # of the repo. They become available under `pkgs.third_party.<name>`
+    inherit (nixpkgs)
+      age
+      autoconf
+      bashInteractive
+      bat
+      buildGoModule
+      buildGoPackage
+      bzip2
+      c-ares
+      cacert
+      cachix
+      cairo
+      cargo
+      cgit
+      clang-tools
+      clangStdenv
+      clang_10
+      cmake
+      coreutils
+      cudatoolkit
+      darwin
+      dockerTools
+      fetchFromGitHub
+      fetchurl
+      fetchzip
+      fira
+      fira-code
+      fira-mono
+      fontconfig
+      freetype
+      gettext
+      glibc
+      gnutar
+      go
+      google-cloud-sdk
+      graphviz
+      grpc
+      gzip
+      haskell
+      iana-etc
+      imagemagickBig
+      jetbrains-mono
+      jq
+      kontemplate
+      lib
+      libredirect
+      luajit
+      luatex
+      makeFontsConf
+      makeWrapper
+      mdbook
+      meson
+      mime-types
+      moreutils
+      nano
+      nginx
+      ninja
+      nix
+      openssh
+      openssl
+      overrideCC
+      pandoc
+      parallel
+      pkgconfig
+      pounce
+      protobuf
+      python3
+      python3Packages
+      remarshal
+      rink
+      ripgrep
+      rsync
+      runCommand
+      runCommandNoCC
+      rustPlatform
+      rustc
+      sbcl
+      sqlite
+      stdenv
+      stern
+      symlinkJoin
+      systemd
+      tdlib
+      terraform_0_12
+      texlive
+      thttpd
+      tree
+      writeShellScript
+      writeShellScriptBin
+      writeText
+      writeTextFile
+      xorg
+      xz
+      zlib
+      zstd;
+
+    # Inherit packages that should come from a stable channel
+    inherit (stableNixpkgs)
+      emacs26
+      emacs26-nox
+      emacsPackages
+      emacsPackagesGen;
+
+    # Required by //third_party/nix
+    inherit (nixpkgs)
+      aws-sdk-cpp
+      bison
+      boehmgc
+      boost # urgh
+      brotli
+      busybox-sandbox-shell
+      curl
+      docbook5
+      docbook_xsl_ns
+      editline
+      flex
+      libseccomp
+      libsodium
+      libxml2
+      libxslt
+      mercurial
+      perl
+      perlPackages
+      utillinuxMinimal;
+  };
+
+in exposed // {
+  callPackage = nixpkgs.lib.callPackageWith exposed;
+
+  # Provide the source code of nixpkgs, but do not provide an imported
+  # version of it.
+  inherit nixpkgsCommit nixpkgsSrc stableNixpkgsSrc;
+
+  # Packages to be overridden
+  originals = {
+    inherit (nixpkgs) abseil-cpp notmuch;
+    inherit (stableNixpkgs) git;
+    ffmpeg = nixpkgs.ffmpeg-full;
+  };
+
+  # Use LLVM 10
+  llvmPackages = nixpkgs.llvmPackages_10;
+
+  # Make NixOS available
+  nixos = import "${stableNixpkgsSrc}/nixos";
+}