11 files changed, 965 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/games/openra/common.nix b/nixpkgs/pkgs/games/openra/common.nix
new file mode 100644
index 000000000000..51f941771777
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/common.nix
@@ -0,0 +1,84 @@
+/*  The reusable code, and package attributes, between OpenRA engine packages (engine.nix)
+    and out-of-tree mod packages (mod.nix).
+*/
+{ stdenv, makeSetupHook, curl, unzip, dos2unix, pkgconfig, makeWrapper
+, lua, mono, dotnetPackages, python
+, libGL, freetype, openal, SDL2
+, zenity
+}:
+
+with stdenv.lib;
+
+let
+  path = makeBinPath ([ mono python ] ++ optional (zenity != null) zenity);
+  rpath = makeLibraryPath [ lua freetype openal SDL2 ];
+  mkdirp = makeSetupHook { } ./mkdirp.sh;
+
+in {
+  patchEngine = dir: version: ''
+    sed -i \
+      -e 's/^VERSION.*/VERSION = ${version}/g' \
+      -e '/fetch-geoip-db/d' \
+      -e '/GeoLite2-Country.mmdb.gz/d' \
+      ${dir}/Makefile
+
+    sed -i 's|locations=.*|locations=${lua}/lib|' ${dir}/thirdparty/configure-native-deps.sh
+  '';
+
+  wrapLaunchGame = openraSuffix: ''
+    # Setting TERM=xterm fixes an issue with terminfo in mono: System.Exception: Magic number is wrong: 542
+    # https://github.com/mono/mono/issues/6752#issuecomment-365212655
+    wrapProgram $out/lib/openra${openraSuffix}/launch-game.sh \
+      --prefix PATH : "${path}" \
+      --prefix LD_LIBRARY_PATH : "${rpath}" \
+      --set TERM xterm
+
+    makeWrapper $out/lib/openra${openraSuffix}/launch-game.sh $(mkdirp $out/bin)/openra${openraSuffix} \
+      --run "cd $out/lib/openra${openraSuffix}"
+  '';
+
+  packageAttrs = {
+    buildInputs = with dotnetPackages; [
+      FuzzyLogicLibrary
+      MaxMindDb
+      MaxMindGeoIP2
+      MonoNat
+      NewtonsoftJson
+      NUnit3
+      NUnitConsole
+      OpenNAT
+      RestSharp
+      SharpFont
+      SharpZipLib
+      SmartIrc4net
+      StyleCopMSBuild
+      StyleCopPlusMSBuild
+    ] ++ [
+      libGL
+    ];
+
+    # TODO: Test if this is correct.
+    nativeBuildInputs = [
+      curl
+      unzip
+      dos2unix
+      pkgconfig
+      makeWrapper
+      mkdirp
+      mono
+      python
+    ];
+
+    makeFlags = [ "prefix=$(out)" ];
+
+    doCheck = true;
+
+    dontStrip = true;
+
+    meta = {
+      maintainers = with maintainers; [ fusion809 msteen rardiol ];
+      license = licenses.gpl3;
+      platforms = platforms.linux;
+    };
+  };
+}
diff --git a/nixpkgs/pkgs/games/openra/default.nix b/nixpkgs/pkgs/games/openra/default.nix
new file mode 100644
index 000000000000..2e8533f7816e
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/default.nix
@@ -0,0 +1,71 @@
+/*  This file defines all OpenRA packages under `openraPackages`,
+    e.g. the OpenRA release engine can be found at `openraPackages.engines.release` (see `engines.nix`),
+    or the out-of-tree mod "Combined Arms" can be found at `openraPackages.mods.ca` (see `mods.nix`).
+    The `openra` package is just an alias to `openraPackages.engines.release`,
+    and just provides the mods included in the source code of the engine.
+    Additional engines or mods can be added with `openraPackages.buildOpenRAEngine` (function around `engine.nix`)
+    and `openraPackages.buildOpenRAMod` (function around `mod.nix`), respectively.
+*/
+pkgs:
+
+with pkgs.lib;
+
+let
+  /*  Building an engine or out-of-tree mod is very similar,
+      but different enough not to be able to build them with the same package definition,
+      so instaed we define what is common between them in a seperate file.
+
+      Although `callPackage` could be used, it would require undoing `makeOverridable`,
+      because `common.nix` does not define a package, but just an attribute set,
+      which is directly passed as part of the argument to the engines and mods `callPackage`,
+      so either the attributes added by `makeOverridable` have to be removed
+      or the engine and mod package definitions will need to add `...` to the argument list.
+  */
+  common = let f = import ./common.nix; in f (builtins.intersectAttrs (functionArgs f) pkgs // {
+    lua = pkgs.lua5_1;
+    # It is not necessary to run the game, but it is nicer to be given an error dialog in the case of failure,
+    # rather than having to look to the logs why it is not starting.
+    inherit (pkgs.gnome3) zenity;
+  });
+
+  /*  Building a set of engines or mods requires some dependencies as well,
+      so the sets will actually be defined as a function instead,
+      requiring the dependencies and returning the actual set.
+
+      Not all dependencies for defining a engine or mod set are shared,
+      so additional arguments can be passed as well.
+
+      The builders for engines and mods allow to delay specifying the name,
+      by returning a function that expects a name, which we use, in this case,
+      to base the name on the attribute name instead, preventing the need to specify the name twice
+      if the attribute name and engine/mod name are equal.
+  */
+  callWithName = name: value: if isFunction value then value name else value;
+  buildOpenRASet = f: args: pkgs.recurseIntoAttrs (mapAttrs callWithName (f ({
+    inherit (pkgs) fetchFromGitHub;
+    extraPostFetch = ''
+      sed -i 's/curl/curl --insecure/g' $out/thirdparty/{fetch-thirdparty-deps,noget}.sh
+      $out/thirdparty/fetch-thirdparty-deps.sh
+    '';
+  } // args)));
+
+in pkgs.recurseIntoAttrs rec {
+  # The whole attribute set is destructered to ensure those (and only those) attributes are given
+  # and to provide defaults for those that are optional.
+  buildOpenRAEngine = { name ? null, version, description, homepage, mods, src }@engine:
+    # Allow specifying the name at a later point if no name has been given.
+    let builder = name: pkgs.callPackage ./engine.nix (common // {
+      engine = engine // { inherit name; };
+    }); in if name == null then builder else builder name;
+
+  # See `buildOpenRAEngine`.
+  buildOpenRAMod = { name ? null, version, title, description, homepage, src, engine, assetsError ? "" }@mod: ({ version, mods ? [], src }@engine:
+    let builder = name: pkgs.callPackage ./mod.nix (common // {
+      mod = mod // { inherit name assetsError; };
+      engine = engine // { inherit mods; };
+    }); in if name == null then builder else builder name) engine;
+
+  # See `buildOpenRASet`.
+  engines = buildOpenRASet (import ./engines.nix) { inherit buildOpenRAEngine; };
+  mods = buildOpenRASet (import ./mods.nix) { inherit buildOpenRAMod; };
+}
diff --git a/nixpkgs/pkgs/games/openra/engine.nix b/nixpkgs/pkgs/games/openra/engine.nix
new file mode 100644
index 000000000000..7d2d007d0758
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/engine.nix
@@ -0,0 +1,60 @@
+/*  The package defintion for an OpenRA engine.
+    It shares code with `mod.nix` by what is defined in `common.nix`.
+    Similar to `mod.nix` it is a generic package definition,
+    in order to make it easy to define multiple variants of the OpenRA engine.
+    For each mod provided by the engine, a wrapper script is created,
+    matching the naming convention used by `mod.nix`.
+    This package could be seen as providing a set of in-tree mods,
+    while the `mod.nix` pacakges provide a single out-of-tree mod.
+*/
+{ stdenv
+, packageAttrs
+, patchEngine
+, wrapLaunchGame
+, engine
+}:
+
+with stdenv.lib;
+
+stdenv.mkDerivation (recursiveUpdate packageAttrs rec {
+  name = "${pname}-${version}";
+  pname = "openra";
+  version = "${engine.name}-${engine.version}";
+
+  src = engine.src;
+
+  postPatch = patchEngine "." version;
+
+  configurePhase = ''
+    runHook preConfigure
+
+    make version VERSION=${escapeShellArg version}
+
+    runHook postConfigure
+  '';
+
+  buildFlags = [ "DEBUG=false" "default" "man-page" ];
+
+  checkTarget = "nunit test";
+
+  installTargets = [
+    "install"
+    "install-linux-icons"
+    "install-linux-desktop"
+    "install-linux-appdata"
+    "install-linux-mime"
+    "install-man-page"
+  ];
+
+  postInstall = ''
+    ${wrapLaunchGame ""}
+
+    ${concatStrings (map (mod: ''
+      makeWrapper $out/bin/openra $out/bin/openra-${mod} --add-flags Game.Mod=${mod}
+    '') engine.mods)}
+  '';
+
+  meta = {
+    inherit (engine) description homepage;
+  };
+})
diff --git a/nixpkgs/pkgs/games/openra/engines.nix b/nixpkgs/pkgs/games/openra/engines.nix
new file mode 100644
index 000000000000..1c3d2308d972
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/engines.nix
@@ -0,0 +1,41 @@
+{ buildOpenRAEngine, fetchFromGitHub, extraPostFetch }:
+
+let
+  buildUpstreamOpenRAEngine = { version, rev, sha256 }: name: (buildOpenRAEngine {
+    inherit version;
+    description = "Open-source re-implementation of Westwood Studios' 2D Command and Conquer games";
+    homepage = https://www.openra.net/;
+    mods = [ "cnc" "d2k" "ra" "ts" ];
+    src = fetchFromGitHub {
+      owner = "OpenRA";
+      repo = "OpenRA" ;
+      inherit rev sha256 extraPostFetch;
+    };
+  } name).overrideAttrs (origAttrs: {
+    postInstall = ''
+      ${origAttrs.postInstall}
+      cp -r mods/ts $out/lib/openra/mods/
+      cp mods/ts/icon.png $(mkdirp $out/share/pixmaps)/openra-ts.png
+      ( cd $out/share/applications; sed -e 's/Dawn/Sun/g' -e 's/cnc/ts/g' openra-cnc.desktop > openra-ts.desktop )
+    '';
+  });
+
+in {
+  release = name: (buildUpstreamOpenRAEngine rec {
+    version = "20190314";
+    rev = "${name}-${version}";
+    sha256 = "15pvn5cx3g0nzbrgpsfz8dngad5wkzp5dz25ydzn8bmxafiijvcr";
+  } name);
+
+  playtest = name: (buildUpstreamOpenRAEngine rec {
+    version = "20190302";
+    rev = "${name}-${version}";
+    sha256 = "1vqvfk2p2lpk3m0d3rpvj34i8cmk3mfc7w4cn4llqd9zp4kk9pya";
+  } name);
+
+  bleed = buildUpstreamOpenRAEngine {
+    version = "8ee1102";
+    rev = "8ee11028d72cde7556b31d45f556b40be65b4b70";
+    sha256 = "0f1fpf37ms8d7fhlh3rjzsxsk9w23iyi3phs2i7g561292d5rk3l";
+  };
+}
diff --git a/nixpkgs/pkgs/games/openra/mkdirp.sh b/nixpkgs/pkgs/games/openra/mkdirp.sh
new file mode 100644
index 000000000000..7b2cf0b89c0e
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/mkdirp.sh
@@ -0,0 +1,4 @@
+mkdirp() {
+  mkdir -p "$@"
+  echo "$@"
+}
diff --git a/nixpkgs/pkgs/games/openra/mod-launch-game.sh b/nixpkgs/pkgs/games/openra/mod-launch-game.sh
new file mode 100644
index 000000000000..88b53e71e1bc
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/mod-launch-game.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+show_error() {
+  if command -v zenity > /dev/null; then
+    zenity --no-wrap --no-markup --error --title "OpenRA - @title@" --text "$1" 2>/dev/null
+  else
+    printf "$1\n" >&2
+  fi
+  exit 1
+}
+
+cd "@out@/lib/openra-@name@"
+
+# Check for missing assets
+assetsError='@assetsError@'
+if [[ -n "$assetsError" && ! -d "$HOME/.openra/Content/@name@" ]]; then
+  show_error "$assetsError"
+fi
+
+# Run the game
+mono --debug OpenRA.Game.exe Game.Mod=@name@ Engine.LaunchPath="@out@/bin/openra-@name@" Engine.ModSearchPaths="@out@/lib/openra-@name@/mods" "$@"
+
+# Show a crash dialog if something went wrong
+if (( $? != 0 && $? != 1 )); then
+  show_error $'OpenRA - @title@ has encountered a fatal error.\nPlease refer to the crash logs for more information.\n\nLog files are located in ~/.openra/Logs'
+fi
diff --git a/nixpkgs/pkgs/games/openra/mod-update.sh b/nixpkgs/pkgs/games/openra/mod-update.sh
new file mode 100755
index 000000000000..8489d5a97a7c
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/mod-update.sh
@@ -0,0 +1,160 @@
+#!/usr/bin/env bash
+# shellcheck disable=SC2034
+
+# for mod in $(nix eval --raw '(
+#   with import <nixpkgs> { };
+#   with lib;
+#   let mods = attrNames (removeAttrs openraPackages.mods [ "recurseForDerivations" ]);
+#   in concatStringsSep " " mods
+# )'); do
+#   ./mod-update.sh "$mod"
+# done
+
+# Uses: https://github.com/msteen/nix-upfetch
+
+mod=$1
+commit_count=$2
+token=
+nixpkgs='<nixpkgs>'
+
+die() {
+  local ret=$?
+  echo "$*" >&2
+  exit $ret
+}
+
+curl() {
+  command curl --silent --show-error "$@"
+}
+
+get_sha1() {
+  local owner=$1 repo=$2 ref=$3
+  # https://developer.github.com/v3/#authentication
+  curl -H "Authorization: token $token" -H 'Accept: application/vnd.github.VERSION.sha' "https://api.github.com/repos/$owner/$repo/commits/$ref"
+}
+
+[[ -n $mod ]] || die "The first argument of this script has to be a mod identifier."
+
+[[ -n $token ]] || die "Please edit this script to include a GitHub API access token, which is required for API v4:
+https://help.github.com/articles/creating-a-personal-access-token-for-the-command-line/"
+
+# Get current mod_owner and mod_repo.
+vars=$(nix-prefetch --file "$nixpkgs" "openraPackages.mods.$mod" --index 0 --quiet --output json --no-compute-hash > >(
+  jq --raw-output 'with_entries(select(.value | contains("\n") | not)) | to_entries | .[] | .key + "=" + .value')) || exit
+
+mod_owner=; mod_repo=; mod_rev=
+while IFS='=' read -r key val; do
+  declare "mod_${key}=${val}"
+done <<< "$vars"
+
+if [[ -n $commit_count ]]; then
+  query_on_commit='{
+  history(first: 10) {
+    nodes {
+      abbreviatedOid
+      oid
+    }
+    totalCount
+  }
+}'
+else
+  query_on_commit='{
+  history(first: 0) {
+    totalCount
+  }
+  abbreviatedOid
+  oid
+}'
+fi
+
+# shellcheck disable=SC2089
+query='{
+  repository(owner: "'$mod_owner'", name: "'$mod_repo'") {
+    defaultBranchRef {
+      target {
+        ... on Commit '$query_on_commit'
+      }
+    }
+    licenseInfo {
+      key
+    }
+  }
+}'
+
+# Newlines are not allowed in a query.
+# https://developer.github.com/v4/guides/forming-calls/#communicating-with-graphql
+# shellcheck disable=SC2086 disable=SC2090 disable=SC2116
+query=$(echo $query)
+query=${query//\"/\\\"}
+
+# https://developer.github.com/v4/guides/using-the-explorer/#configuring-graphiql
+json=$(curl -H "Authorization: bearer $token" -X POST -d '{ "query": "'"$query"'" }' https://api.github.com/graphql) || exit
+
+if [[ -n $commit_count ]]; then
+  json=$(jq "$commit_count"' as $commit_count
+    | .data.repository.defaultBranchRef.target
+    |= (.history |= (. | del(.nodes) | .totalCount = $commit_count))
+    + (.history | .nodes[.totalCount - $commit_count])' <<< "$json") || exit
+fi
+
+vars=$(jq --raw-output '.data.repository | {
+  license_key: .licenseInfo.key,
+} + (.defaultBranchRef.target | {
+  version: ((.history.totalCount | tostring) + ".git." + .abbreviatedOid),
+  rev: .oid,
+}) | to_entries | .[] | .key + "=" + (.value | tostring)' <<< "$json") || exit
+
+mod_license_key=; mod_version=; mod_rev=
+while IFS='=' read -r key val; do
+  declare "mod_${key}=${val}"
+done <<< "$vars"
+
+mod_config=$(curl "https://raw.githubusercontent.com/$mod_owner/$mod_repo/$mod_rev/mod.config") || exit
+
+mod_id=; engine_version=; automatic_engine_management=; automatic_engine_source=
+while IFS='=' read -r key val; do
+  declare "${key,,}=$(jq --raw-output . <<< "$val")"
+done < <(grep '^\(MOD_ID\|ENGINE_VERSION\|AUTOMATIC_ENGINE_MANAGEMENT\|AUTOMATIC_ENGINE_SOURCE\)=' <<< "$mod_config")
+
+for var in mod_id engine_version automatic_engine_management automatic_engine_source; do
+  echo "$var=${!var}" >&2
+done
+echo >&2
+
+[[ $mod_id == "$mod" ]] ||
+  die "The mod '$mod' reports being mod '$mod_id' instead."
+# shellcheck disable=SC2005 disable=SC2046
+[[ $mod_license_key == gpl-3.0 ]] ||
+[[ $(echo $(head -2 <(curl "https://raw.githubusercontent.com/$mod_owner/$mod_repo/$mod_rev/COPYING"))) == 'GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007' ]] ||
+  die "The mod '$mod' is licensed under '$mod_license_key' while expecting 'gpl-3.0'."
+[[ $automatic_engine_management == True ]] ||
+  die "The mod '$mod' engine is not managed as a read-only dependency."
+[[ $automatic_engine_source =~ https://github.com/([a-zA-Z0-9_\-]+)/([a-zA-Z0-9_\-]+)/archive/([a-zA-Z0-9_\-\$\{\}]+).zip ]] ||
+  die "The mod '$mod' engine is not hosted on GitHub as an archive."
+
+engine_owner=${BASH_REMATCH[1]}
+engine_repo=${BASH_REMATCH[2]}
+# shellcheck disable=SC2016
+[[ ${BASH_REMATCH[3]} == '${ENGINE_VERSION}' ]] || engine_version=${BASH_REMATCH[3]}
+engine_rev=$(get_sha1 "$engine_owner" "$engine_repo" "$engine_version")
+
+for type in mod engine; do
+  for name in version owner repo rev; do
+    var="${type}_${name}"
+    echo "$var=${!var}" >&2
+  done
+  echo >&2
+done
+
+i=0
+for type in mod engine; do
+  fetcher_args=()
+  for name in owner repo rev; do
+    var="${type}_${name}"
+    fetcher_args+=( "--$name" "${!var}" )
+  done
+  var="${type}_version"
+  version=${!var}
+  nix-upfetch --yes --version "$version" "$(nix-preupfetch --file "$nixpkgs" "openraPackages.mods.$mod" --index $i -- "${fetcher_args[@]}")"
+  (( i++ ))
+done
diff --git a/nixpkgs/pkgs/games/openra/mod.nix b/nixpkgs/pkgs/games/openra/mod.nix
new file mode 100644
index 000000000000..8df5922a4418
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/mod.nix
@@ -0,0 +1,105 @@
+/*  The package defintion for an OpenRA out-of-tree mod.
+    It shares code with `engine.nix` by what is defined in `common.nix`.
+    To build an out-of-tree mod it needs the source code of the engine available,
+    and they each need to be build with a specific version or fork of the engine,
+    so the engine needs to be supplied as an argument as well.
+    The engine is relatively small and quick to build, so this is not much of a problem.
+    Building a mod will result in a wrapper script that starts the mod inside the specified engine.
+*/
+{ stdenv
+, packageAttrs
+, patchEngine
+, wrapLaunchGame
+, mod
+, engine
+}:
+
+with stdenv.lib;
+
+let
+  engineSourceName = engine.src.name or "engine";
+  modSourceName = mod.src.name or "mod";
+
+# Based on: https://build.opensuse.org/package/show/home:fusion809/openra-ura
+in stdenv.mkDerivation (recursiveUpdate packageAttrs rec {
+  name = "${pname}-${version}";
+  pname = "openra-${mod.name}";
+  inherit (mod) version;
+
+  srcs = [
+    mod.src
+    engine.src
+  ];
+
+  sourceRoot = ".";
+
+  postUnpack = ''
+    mv ${engineSourceName} ${modSourceName}
+    cd ${modSourceName}
+  '';
+
+  postPatch = ''
+    cat <<'EOF' > fetch-engine.sh
+    #!/bin/sh
+    exit 0
+    EOF
+
+    sed -i 's/^VERSION.*/VERSION = ${version}/g' Makefile
+
+    dos2unix *.md
+
+    ${patchEngine engineSourceName engine.version}
+  '';
+
+  configurePhase = ''
+    runHook preConfigure
+
+    make version VERSION=${escapeShellArg version}
+    make -C ${engineSourceName} version VERSION=${escapeShellArg engine.version}
+
+    runHook postConfigure
+  '';
+
+  checkTarget = "test";
+
+  installPhase = ''
+    runHook preInstall
+
+    make -C ${engineSourceName} install-engine install-common-mod-files DATA_INSTALL_DIR=$out/lib/${pname}
+
+    cp -r ${engineSourceName}/mods/{${concatStringsSep "," ([ "common" "modcontent" ] ++ engine.mods)}} mods/* \
+      $out/lib/${pname}/mods/
+
+    substitute ${./mod-launch-game.sh} $out/lib/${pname}/launch-game.sh \
+      --subst-var out \
+      --subst-var-by name ${escapeShellArg mod.name} \
+      --subst-var-by title ${escapeShellArg mod.title} \
+      --subst-var-by assetsError ${escapeShellArg mod.assetsError}
+    chmod +x $out/lib/${pname}/launch-game.sh
+
+    ${wrapLaunchGame "-${mod.name}"}
+
+    substitute ${./openra-mod.desktop} $(mkdirp $out/share/applications)/${pname}.desktop \
+      --subst-var-by name ${escapeShellArg mod.name} \
+      --subst-var-by title ${escapeShellArg mod.title} \
+      --subst-var-by description ${escapeShellArg mod.description}
+
+    cp README.md $(mkdirp $out/share/doc/packages/${pname})/README.md
+
+    [[ -e mods/${mod.name}/icon.png ]] && mod_icon=mods/${mod.name}/icon.png || {
+      [[ -e mods/${mod.name}/logo.png ]] && mod_icon=mods/${mod.name}/logo.png || mod_icon=packaging/linux/mod_256x256.png
+    }
+    cp "$mod_icon" $(mkdirp $out/share/pixmaps)/${pname}.png
+
+    for size in 16 32 48 64 128 256; do
+      size=''${size}x''${size}
+      cp packaging/linux/mod_''${size}.png $(mkdirp $out/share/icons/hicolor/''${size}/apps)/${pname}.png
+    done
+
+    runHook postInstall
+  '';
+
+  meta = {
+    inherit (mod) description homepage;
+  };
+})
diff --git a/nixpkgs/pkgs/games/openra/mods.nix b/nixpkgs/pkgs/games/openra/mods.nix
new file mode 100644
index 000000000000..a045e365eceb
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/mods.nix
@@ -0,0 +1,344 @@
+{ buildOpenRAMod, fetchFromGitHub, extraPostFetch }:
+
+let
+  unsafeBuildOpenRAMod = attrs: name: (buildOpenRAMod attrs name).overrideAttrs (_: {
+    doCheck = false;
+  });
+
+in {
+  ca = buildOpenRAMod {
+    version = "96.git.fc3cf0b";
+    title = "Combined Arms";
+    description = "A game that combines units from the official OpenRA Red Alert and Tiberian Dawn mods";
+    homepage = https://github.com/Inq8/CAmod;
+    src = fetchFromGitHub {
+      owner = "Inq8";
+      repo = "CAmod";
+      rev = "fc3cf0baf2b827650eaae9e1d2335a3eed24bac9";
+      sha256 = "15w91xs253gyrlzsgid6ixxjazx0fbzick6vlkiay0znb58n883m";
+    };
+    engine = {
+      version = "b8a7dd5";
+      src = fetchFromGitHub {
+        owner = "Inq8";
+        repo = "CAengine" ;
+        rev = "b8a7dd52ff893ed8225726d4ed4e14ecad748404";
+        sha256 = "0dyk861qagibx8ldshz7d2nrki9q550f6f0wy8pvayvf1gv1dbxj";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+  };
+
+  d2 = unsafeBuildOpenRAMod rec {
+    version = "134.git.69a4aa7";
+    title = "Dune II";
+    description = "A modernization of the original ${title} game";
+    homepage = https://github.com/OpenRA/d2;
+    src = fetchFromGitHub {
+      owner = "OpenRA";
+      repo = "d2";
+      rev = "69a4aa708e2c26376469c0048fac13592aa452ca";
+      sha256 = "1mfch4s6c05slyqvxllklbxpqq8dqcbx3515n3gyylyq43gq481r";
+    };
+    engine = rec {
+      version = "release-20181215";
+      mods = [ "cnc" "d2k" "ra" ];
+      src = fetchFromGitHub {
+        owner = "OpenRA";
+        repo = "OpenRA" ;
+        rev = version;
+        sha256 = "0p0izykjnz7pz02g2khp7msqa00jhjsrzk9y0g29dirmdv75qa4r";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+    assetsError = ''
+      The mod expects the original ${title} game assets in place:
+      https://github.com/OpenRA/d2/wiki
+    '';
+  };
+
+  dr = buildOpenRAMod rec {
+    version = "324.git.ffcd6ba";
+    title = "Dark Reign";
+    description = "A re-imagination of the original Command & Conquer: ${title} game";
+    homepage = https://github.com/drogoganor/DarkReign;
+    src = fetchFromGitHub {
+      owner = "drogoganor";
+      repo = "DarkReign";
+      rev = "ffcd6ba72979e5f77508136ed7b0efc13e4b100e";
+      sha256 = "07g4qw909649s3i1yhw75613mpwfka05jana5mpp5smhnf0pkack";
+    };
+    engine = {
+      version = "DarkReign";
+      src = fetchFromGitHub {
+        owner = "drogoganor";
+        repo = "OpenRA" ;
+        rev = "f91d3f2603bbf51afaa89357e4defcdc36138102";
+        sha256 = "05g900ri6q0zrkrk8rmjaz576vjggmi2y6jm0xz3cwli54prn11w";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+  };
+
+  gen = buildOpenRAMod {
+    version = "1157.git.4f5e11d";
+    title = "Generals Alpha";
+    description = "Re-imagination of the original Command & Conquer: Generals game";
+    homepage = https://github.com/MustaphaTR/Generals-Alpha;
+    src = fetchFromGitHub {
+      owner = "MustaphaTR";
+      repo = "Generals-Alpha";
+      rev = "4f5e11d916e4a03d8cf1c97eef484ce2d77d7df2";
+      sha256 = "1wnl4qrlhynnlahgdlxwhgsdba5wgdg9yrv9f8hkgi69j60szypd";
+    };
+    engine = rec {
+      version = "gen-20190128_3";
+      src = fetchFromGitHub {
+        owner = "MustaphaTR";
+        repo = "OpenRA" ;
+        rev = version;
+        sha256 = "1x6byz37s8qcpqj902zvkvbv95rv2mv2kj35c12gbpyc92xkqkq0";
+        name = "generals-alpha-engine";
+        inherit extraPostFetch;
+      };
+    };
+  };
+
+  kknd = let version = "145.git.5530bab"; in name: (buildOpenRAMod rec {
+    inherit version;
+    title = "Krush, Kill 'n' Destroy";
+    description = "Re-imagination of the original ${title} game";
+    homepage = https://kknd-game.com/;
+    src = fetchFromGitHub {
+      owner = "IceReaper";
+      repo = "KKnD";
+      rev = "5530babcb05170e0959e4cf2b079161e9fedde4f";
+      sha256 = "07jczrarmgm6zdk0myzwgq200x19yvpjyxrnhdac08mjgyz75zk1";
+    };
+    engine = {
+      version = "4e8eab4ca00d1910203c8a103dfd2c002714daa8";
+      src = fetchFromGitHub {
+        owner = "IceReaper";
+        repo = "OpenRA" ;
+        rev = "4e8eab4ca00d1910203c8a103dfd2c002714daa8";
+        sha256 = "1yyqparf93x8yzy1f46gsymgkj5jls25v2yc7ighr3f7mi3igdvq";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+  } name).overrideAttrs (origAttrs: {
+    postPatch = ''
+      ${origAttrs.postPatch}
+      sed -i 's/{DEV_VERSION}/${version}/' mods/*/mod.yaml
+    '';
+  });
+
+  mw = buildOpenRAMod rec {
+    version = "257.git.c9be8f2";
+    title = "Medieval Warfare";
+    description = "A re-imagination of the original Command & Conquer: ${title} game";
+    homepage = https://github.com/CombinE88/Medieval-Warfare;
+    src = fetchFromGitHub {
+      owner = "CombinE88";
+      repo = "Medieval-Warfare";
+      rev = "c9be8f2a6f1dd710b1aedd9d5b00b4cf5020e2fe";
+      sha256 = "09fp7k95jd6hjqdasbspbd43z5670wkyzbbgqkll9dfsrv0sky0v";
+    };
+    engine = {
+      version = "MedievalWarfareEngine";
+      src = fetchFromGitHub {
+        owner = "CombinE88";
+        repo = "OpenRA" ;
+        rev = "52109c0910f479753704c46fb19e8afaab353c83";
+        sha256 = "0ga3855j6bc7h81q03cw6laiaiz12915zg8aqah1idvxbzicfy7l";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+  };
+
+  ra2 = buildOpenRAMod rec {
+    version = "903.git.2f7c700";
+    title = "Red Alert 2";
+    description = "Re-imagination of the original Command & Conquer: ${title} game";
+    homepage = https://github.com/OpenRA/ra2;
+    src = fetchFromGitHub {
+      owner = "OpenRA";
+      repo = "ra2";
+      rev = "2f7c700d6d63c0625e7158ef3098221fa6741569";
+      sha256 = "11vnzwczn47wjfrq6y7z9q234p27ihdrcl5p87i6h2xnrpwi8b6m";
+    };
+    engine = rec {
+      version = "release-20180923";
+      src = fetchFromGitHub {
+        owner = "OpenRA";
+        repo = "OpenRA" ;
+        rev = version;
+        sha256 = "1pgi3zaq9fwwdq6yh19bwxscslqgabjxkvl9bcn1a5agy4bfbqk5";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+    assetsError = ''
+      The mod expects the original ${title} game assets in place:
+      https://github.com/OpenRA/ra2/wiki
+    '';
+  };
+
+  raclassic = buildOpenRAMod {
+    version = "183.git.c76c13e";
+    title = "Red Alert Classic";
+    description = "A modernization of the original Command & Conquer: Red Alert game";
+    homepage = https://github.com/OpenRA/raclassic;
+    src = fetchFromGitHub {
+      owner = "OpenRA";
+      repo = "raclassic";
+      rev = "c76c13e9f0912a66ddebae8d05573632b19736b2";
+      sha256 = "1cnr3ccvrkjlv8kkdcglcfh133yy0fkva9agwgvc7wlj9n5ydl4g";
+    };
+    engine = rec {
+      version = "release-20190314";
+      src = fetchFromGitHub {
+        owner = "OpenRA";
+        repo = "OpenRA" ;
+        rev = version;
+        sha256 = "15pvn5cx3g0nzbrgpsfz8dngad5wkzp5dz25ydzn8bmxafiijvcr";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+  };
+
+  rv = unsafeBuildOpenRAMod {
+    version = "1330.git.9230e6f";
+    title = "Romanov's Vengeance";
+    description = "Re-imagination of the original Command & Conquer: Red Alert 2 game";
+    homepage = https://github.com/MustaphaTR/Romanovs-Vengeance;
+    src = fetchFromGitHub {
+      owner = "MustaphaTR";
+      repo = "Romanovs-Vengeance";
+      rev = "9230e6f1dd9758467832aee4eda115e18f0e635f";
+      sha256 = "0bwbmmlhp1kh8rgk2nx1ca9vqssj849amndacf318d61gksc1w9n";
+    };
+    engine = {
+      version = "f3873ae";
+      mods = [ "as" ];
+      src = fetchFromGitHub {
+        owner = "AttacqueSuperior";
+        repo = "Engine";
+        rev = "f3873ae242803051285994d77eb26f4b951594b5";
+        sha256 = "02rv29wja0p5d083pd087daz7x7pp5b9ym7sci2fhg3mrnaqgwkp";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+    assetsError = ''
+      The mod expects the Command & Conquer: The Ultimate Collection assets in place:
+      https://github.com/OpenRA/ra2/wiki
+    '';
+  };
+
+  sp = unsafeBuildOpenRAMod {
+    version = "221.git.ac000cc";
+    title = "Shattered Paradise";
+    description = "Re-imagination of the original Command & Conquer: Tiberian Sun game";
+    homepage = https://github.com/ABrandau/OpenRAModSDK;
+    src = fetchFromGitHub {
+      owner = "ABrandau";
+      repo = "OpenRAModSDK";
+      rev = "ac000cc15377cdf6d3c2b72c737d692aa0ed8bcd";
+      sha256 = "16mzs5wcxj9nlpcyx2c87idsqpbm40lx0rznsccclnlb3hiwqas9";
+    };
+    engine = {
+      version = "SP-22-04-19";
+      mods = [ "as" "ts" ];
+      src = fetchFromGitHub {
+        owner = "ABrandau";
+        repo = "OpenRA" ;
+        rev = "bb0930008a57c07f3002421023f6b446e3e3af69";
+        sha256 = "1jvgpbf56hd02ikhklv49br4d1jiv5hphc5kl79qnjlaacnj222x";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+  };
+
+  ss = buildOpenRAMod rec {
+    version = "77.git.23e1f3e";
+    title = "Sole Survivor";
+    description = "A re-imagination of the original Command & Conquer: ${title} game";
+    homepage = https://github.com/MustaphaTR/sole-survivor;
+    src = fetchFromGitHub {
+      owner = "MustaphaTR";
+      repo = "sole-survivor";
+      rev = "23e1f3e5d8b98c936797b6680d95d56a69a9e2ab";
+      sha256 = "104clmxphchs7r8y7hpmw103bychayz80bqj98bp89i64nv9d89x";
+    };
+    engine = {
+      version = "6de92de";
+      src = fetchFromGitHub {
+        owner = "OpenRA";
+        repo = "OpenRA" ;
+        rev = "6de92de8d982094a766eab97a92225c240d85493";
+        sha256 = "0ps9x379plrrj1hnj4fpr26lc46mzgxknv5imxi0bmrh5y4781ql";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+  };
+
+  ura = buildOpenRAMod {
+    version = "431.git.128dc53";
+    title = "Red Alert Unplugged";
+    description = "Re-imagination of the original Command & Conquer: Red Alert game";
+    homepage = http://redalertunplugged.com/;
+    src = fetchFromGitHub {
+      owner = "RAunplugged";
+      repo = "uRA";
+      rev = "128dc53741fae923f4af556f2293ceaa0cf571f0";
+      sha256 = "1mhr8kyh313z52gdrqv31d6z7jvdldiajalca5mcr8gzg6mph66p";
+    };
+    engine = rec {
+      version = "unplugged-cd82382";
+      src = fetchFromGitHub {
+        owner = "RAunplugged";
+        repo = "OpenRA" ;
+        rev = version;
+        sha256 = "1p5hgxxvxlz8480vj0qkmnxjh7zj3hahk312m0zljxfdb40652w1";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+  };
+
+  yr = unsafeBuildOpenRAMod rec {
+    version = "199.git.5b8b952";
+    homepage = https://github.com/cookgreen/yr;
+    title = "Yuri's Revenge";
+    description = "Re-imagination of the original Command & Conquer: ${title} game";
+    src = fetchFromGitHub {
+      owner = "cookgreen";
+      repo = "yr";
+      rev = "5b8b952dbe21f194a6d00485f20e215ce8362712";
+      sha256 = "0hxzrqnz5d7qj1jjr20imiyih62x1cnmndf75nnil4c4sj82f9a6";
+    };
+    engine = rec {
+      version = "release-20190314";
+      src = fetchFromGitHub {
+        owner = "OpenRA";
+        repo = "OpenRA" ;
+        rev = version;
+        sha256 = "15pvn5cx3g0nzbrgpsfz8dngad5wkzp5dz25ydzn8bmxafiijvcr";
+        name = "engine";
+        inherit extraPostFetch;
+      };
+    };
+    assetsError = ''
+      The mod expects the Command & Conquer: The Ultimate Collection assets in place:
+      https://github.com/OpenRA/ra2/wiki
+    '';
+  };
+}
diff --git a/nixpkgs/pkgs/games/openra/openra-mod.desktop b/nixpkgs/pkgs/games/openra/openra-mod.desktop
new file mode 100644
index 000000000000..090b6c1325d1
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/openra-mod.desktop
@@ -0,0 +1,11 @@
+[Desktop Entry]
+Type=Application
+Version=1.0
+Name=OpenRA - @title@
+GenericName=Real Time Strategy Game
+GenericName[de]=Echtzeit-Strategiespiel
+Comment=@description@
+Icon=openra-@name@
+Exec=openra-@name@
+Terminal=false
+Categories=Game;StrategyGame;X-RTS;X-RealTimeStrategy;X-RealTimeStrategyGame;
diff --git a/nixpkgs/pkgs/games/openra/packages.nix b/nixpkgs/pkgs/games/openra/packages.nix
new file mode 100644
index 000000000000..c09b697771a3
--- /dev/null
+++ b/nixpkgs/pkgs/games/openra/packages.nix
@@ -0,0 +1,60 @@
+pkgs:
+
+let
+  /*  Building an engine or out-of-tree mod is very similar,
+      but different enough not to be able to build them with the same package definition,
+      so instaed we define what is common between them in a seperate file.
+
+      Although `callPackage` could be used, it would require undoing `makeOverridable`,
+      because `common.nix` does not define a package, but just an attribute set,
+      which is directly passed as part of the argument to the engines and mods `callPackage`,
+      so either the attributes added by `makeOverridable` have to be removed
+      or the engine and mod package definitions will need to add `...` to the argument list.
+  */
+  common = let f = import ./common.nix; in f (builtins.intersectAttrs (builtins.functionArgs f) pkgs // {
+    lua = pkgs.lua5_1;
+    # It is not necessary to run the game, but it is nicer to be given an error dialog in the case of failure,
+    # rather than having to look to the logs why it is not starting.
+    inherit (pkgs.gnome3) zenity;
+  });
+
+  /*  Building a set of engines or mods requires some dependencies as well,
+      so the sets will actually be defined as a function instead,
+      requiring the dependencies and returning the actual set.
+
+      Not all dependencies for defining a engine or mod set are shared,
+      so additional arguments can be passed as well.
+
+      The builders for engines and mods allow to delay specifying the name,
+      by returning a function that expects a name, which we use, in this case,
+      to base the name on the attribute name instead, preventing the need to specify the name twice
+      if the attribute name and engine/mod name are equal.
+  */
+  buildOpenRASet = f: args: builtins.mapAttrs (name: value: if builtins.isFunction value then value name else value) (f ({
+    inherit (pkgs) fetchFromGitHub;
+    extraPostFetch = ''
+      sed -i 's/curl/curl --insecure/g' $out/thirdparty/{fetch-thirdparty-deps,noget}.sh
+      $out/thirdparty/fetch-thirdparty-deps.sh
+    '';
+  } // args));
+
+in rec {
+  # The whole attribute set is destructered to ensure those (and only those) attributes are given
+  # and to provide defaults for those that are optional.
+  buildOpenRAEngine = { name ? null, version, description, homepage, mods, src, installExperimental ? "" }@engine:
+    # Allow specifying the name at a later point if no name has been given.
+    let builder = name: pkgs.callPackage ./engine.nix (common // {
+      engine = engine // { inherit name installExperimental; };
+    }); in if name == null then builder else builder name;
+
+  # See `buildOpenRAEngine`.
+  buildOpenRAMod = { name ? null, version, title, description, homepage, src, engine }@mod: ({ version, mods ? [], src }@engine:
+    let builder = name: pkgs.callPackage ./mod.nix (common // {
+      mod = mod // { inherit name; };
+      engine = engine // { inherit mods; };
+    }); in if name == null then builder else builder name) engine;
+
+  # See `buildOpenRASet`.
+  engines = buildOpenRASet (import ./engines.nix) { inherit buildOpenRAEngine; };
+  mods = buildOpenRASet (import ./mods.nix) { inherit buildOpenRAMod; };
+}