From 650ac68669a4ffef288fc3a25e0b96267633f7ac Mon Sep 17 00:00:00 2001
From: Tony Olagbaiye <me@fron.io>
Date: Mon, 20 Apr 2020 05:51:06 +0100
Subject: [PATCH] nix: add default.nix and envrc/shell.nix

---
 .envrc      |  8 ++++++
 default.nix | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 shell.nix   | 35 ++++++++++++++++++++++++
 3 files changed, 122 insertions(+)
 create mode 100644 .envrc
 create mode 100644 default.nix
 create mode 100644 shell.nix

diff --git a/.envrc b/.envrc
new file mode 100644
index 000000000..4d1873eb8
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,8 @@
+if type lorri &>/dev/null; then
+    echo "direnv: using lorri from PATH ($(type -p lorri))"
+    eval "$(lorri direnv)"
+else
+    # fall back to using direnv's builtin nix support
+    # to prevent bootstrapping problems.
+    use nix
+fi
diff --git a/default.nix b/default.nix
new file mode 100644
index 000000000..3cad48cf0
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,79 @@
+{ rev    ? "c7e0e9ed5abd0043e50ee371129fcb8640264fc4"
+, sha256 ? "0c28mpvjhjc8kiwj2w8zcjsr2rayw989a1wnsqda71zpcyas3mq2"
+, pkgs   ? import (builtins.fetchTarball { inherit sha256;
+    url = "https://github.com/NixOS/nixpkgs/archive/${rev}.tar.gz";
+  }) { }
+
+, stdenv ? if useClang
+           then (if pkgs.stdenv.cc.isClang
+                 then pkgs.stdenv
+                 else pkgs.llvmPackages_latest.stdenv)
+           else (if pkgs.stdenv.cc.isGNU
+                 then pkgs.stdenv
+                 else pkgs.gcc.stdenv)
+, lib ? pkgs.lib
+
+, debug              ? false # Debug Build
+, useClang           ? false # Use Clang over GCC
+, useJemalloc        ? true # Use the Dynamic Memory Allocator
+, withGraphicsMagick ? true # Allow Media Thumbnails
+}:
+
+stdenv.mkDerivation rec {
+  pname = "matrix-construct";
+  version = "development";
+
+  src = lib.cleanSource ./.;
+
+  preAutoreconf = let
+    VERSION_COMMIT_CMD = "git rev-parse --short HEAD";
+    VERSION_BRANCH_CMD = "git rev-parse --abbrev-ref HEAD";
+    VERSION_TAG_CMD = "git describe --tags --abbrev=0 --dirty --always";
+    VERSION_CMD = "git describe --tags --always";
+    runWithGit = id: cmd: lib.removeSuffix "\n" (builtins.readFile (pkgs.runCommandNoCCLocal "construct-${id}" {
+      buildInputs = [ pkgs.git ];
+    } "cd ${./.} && ${cmd} > $out"));
+  in ''
+    substituteInPlace configure.ac --replace "${VERSION_COMMIT_CMD}" "echo ${runWithGit "version-commit" VERSION_COMMIT_CMD}"
+    substituteInPlace configure.ac --replace "${VERSION_BRANCH_CMD}" "echo ${runWithGit "version-branch" VERSION_BRANCH_CMD}"
+    substituteInPlace configure.ac --replace "${VERSION_TAG_CMD}" "echo ${runWithGit "version-tag" VERSION_TAG_CMD}"
+    substituteInPlace configure.ac --replace "${VERSION_CMD}" "echo ${runWithGit "version" VERSION_CMD}"
+  '';
+
+  configureFlags = [
+    "--enable-generic"
+    "--with-custom-branding=nix"
+    "--with-custom-version=dev"
+    "--with-boost-libdir=${pkgs.boost.out}/lib"
+    "--with-boost=${pkgs.boost.dev}"
+    "--with-magic-file=${pkgs.file}/share/misc/magic.mgc"
+  ] ++ lib.optional useJemalloc "--enable-jemalloc"
+    ++ lib.optional withGraphicsMagick [
+    "--with-imagemagick-includes=${pkgs.graphicsmagick}/include/GraphicsMagick"
+  ] ++ lib.optional debug "--with-log-level=DEBUG";
+
+  preBuild = ''
+    make clean
+  '';
+
+  enableParallelBuilding = true;
+
+  nativeBuildInputs = with pkgs; [
+    autoreconfHook pkg-config
+  ] ++ lib.optional useClang llvmPackages_latest.llvm
+    ++ lib.optional useJemalloc jemalloc;
+  buildInputs = with pkgs; [
+    libsodium openssl file boost gmp
+    (rocksdb.overrideAttrs (super: rec {
+      version = "5.16.6";
+      src = pkgs.fetchFromGitHub {
+        owner = "facebook";
+        repo = "rocksdb";
+        rev = "v${version}";
+        sha256 = "0yy09myzbi99qdmh2c2mxlddr12pwxzh66ym1y6raaqglrsmax66";
+      };
+      cmakeFlags = builtins.map (f: if f == "-DWITH_TOOLS=0" then "-DWITH_TOOLS=1" else f) super.cmakeFlags;
+      NIX_CFLAGS_COMPILE = "${super.NIX_CFLAGS_COMPILE} -Wno-error=redundant-move";
+    }))
+  ] ++ lib.optional withGraphicsMagick graphicsmagick;
+}
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 000000000..f6412131b
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,35 @@
+{ pkgs ? import <nixpkgs> { } }:
+
+let
+  package = pkgs.callPackage ./. {};
+in pkgs.mkShell {
+  buildInputs = with pkgs; [
+    libsodium openssl file boost gmp llvm
+    (rocksdb.overrideAttrs (super: rec {
+      version = "5.16.6";
+      src = pkgs.fetchFromGitHub {
+        owner = "facebook";
+        repo = "rocksdb";
+        rev = "v${version}";
+        sha256 = "0yy09myzbi99qdmh2c2mxlddr12pwxzh66ym1y6raaqglrsmax66";
+      };
+      NIX_CFLAGS_COMPILE = "${super.NIX_CFLAGS_COMPILE} -Wno-error=redundant-move";
+    }))
+    zlib lz4 snappy
+    graphicsmagick
+    jemalloc
+  ];
+  nativeBuildInputs = with pkgs; [ git autoconf automake libtool gcc clang cmake pkg-config ];
+
+  shellHook = ''
+    WORKDIR=$(mktemp -d)
+    export RUNTIME_DIRECTORY=$WORKDIR/runtime
+    export STATE_DIRECTORY=$WORKDIR/state
+    export CACHE_DIRECTORY=$WORKDIR/cache
+    export LOGS_DIRECTORY=$WORKDIR/logs
+    export CONFIGURATION_DIRECTORY=$WORKDIR/configuration
+
+    mkdir -p $RUNTIME_DIRECTORY $STATE_DIRECTORY $LOGS_DIRECTORY
+    mkdir -p $CACHE_DIRECTORY $CONFIGURATION_DIRECTORY
+  '';
+}