gn: remove

Chromium depends on bundled versioon of gn. It's also chromium-specific build
tool, so it's not feasible to package.

pkgs/applications/networking/browsers/chromium/common.nix

@@ -1,4 +1,4 @@
-{ stdenv, gn, ninja, which
+{ stdenv, ninja, which
 
 # default dependencies
 , bzip2, flac, speex, libopus
@@ -86,10 +86,8 @@ let
 
     src = upstream-info.main;
 
-    nativeBuildInputs = [ gn which python2Packages.python perl pkgconfig ];
-
     nativeBuildInputs = [
-      ninja which perl pkgconfig python
+      ninja which python2Packages.python perl pkgconfig
       python2Packages.ply python2Packages.jinja2
     ];
 
@@ -179,6 +177,10 @@ let
     configurePhase = ''
       runHook preConfigure
 
+      # Build gn
+      python tools/gn/bootstrap/bootstrap.py -v -s --no-clean
+      PATH="$PWD/out/Release:$PATH"
+
       # This is to ensure expansion of $out.
       libExecPath="${libExecPath}"
       python build/linux/unbundle/replace_gn_files.py \

pkgs/development/tools/build-managers/gn/default.nix

@@ -1,80 +0,0 @@
-{ stdenv, fetchgit, fetchurl, python2, ninja, libevent, xdg-user-dirs }:
-
-let
-  date = "20161008";
-
-  sourceTree = {
-    "src/base" = {
-      rev = "e71a514e60b085cc92bf6ef951ec329f52c79f9f";
-      sha256 = "0zycbssmd2za0zij8czcs1fr66fi12f1g5ysc8fzkf8khbs5h6a9";
-    };
-    "src/build" = {
-      rev = "17093d45bf738e9ae4b6294492860ee65218a657";
-      sha256 = "0i9py78c3f46sc789qvdhmgjgyrghysbqjgr67iypwphw52jv2dz";
-    };
-    "src/tools/gn" = {
-      rev = "9ff32cf3f1f4ad0212ac674b6303e7aa68f44f3f";
-      sha256 = "14jr45k5fgcqk9d18fd77sijlqavvnv0knndh74zyb0b60464hz1";
-    };
-    "testing/gtest" = {
-      rev = "585ec31ea716f08233a815e680fc0d4699843938";
-      sha256 = "0csn1cza66851nmxxiw42smsm3422mx67vcyykwn0a71lcjng6rc";
-    };
-  };
-
-  mkDepend = path: attrs: fetchgit {
-    url = "https://chromium.googlesource.com/chromium/${path}";
-    inherit (attrs) rev sha256;
-  };
-
-in stdenv.mkDerivation rec {
-  name = "gn-${version}";
-  version = "0.0.0.${date}";
-
-  unpackPhase = ''
-    ${with stdenv.lib; concatStrings (mapAttrsToList (path: sha256: ''
-      dest=source/${escapeShellArg (removePrefix "src/" path)}
-      mkdir -p "$(dirname "$dest")"
-      cp --no-preserve=all -rT ${escapeShellArg (mkDepend path sha256)} "$dest"
-    '') sourceTree)}
-    ( mkdir -p source/third_party
-      cd source/third_party
-      unpackFile ${xdg-user-dirs.src}
-      mv * xdg_user
-    )
-  '';
-
-  sourceRoot = "source";
-
-  postPatch = ''
-    # GN's bootstrap script relies on shebangs (which are relying on FHS paths),
-    # except when on Windows. So instead of patchShebang-ing it, let's just
-    # force the same behaviour as on Windows.
-    sed -i -e '/^def  *check_call/,/^[^ ]/ {
-      s/is_win/True/
-    }' tools/gn/bootstrap/bootstrap.py
-
-    # Patch out Chromium-bundled libevent and xdg_user_dirs
-    sed -i -e '/static_libraries.*libevent/,/^ *\]\?[})]$/d' \
-      tools/gn/bootstrap/bootstrap.py
-  '';
-
-  NIX_LDFLAGS = "-levent";
-
-  nativeBuildInputs = [ python2 ninja ];
-  buildInputs = [ libevent ];
-
-  buildPhase = ''
-    python2 tools/gn/bootstrap/bootstrap.py -v -s --no-clean
-  '';
-
-  installPhase = ''
-    install -vD out_bootstrap/gn "$out/bin/gn"
-  '';
-
-  meta = {
-    description = "A meta-build system that generates NinjaBuild files";
-    homepage = "https://chromium.googlesource.com/chromium/src/tools/gn/";
-    license = stdenv.lib.licenses.bsd3;
-  };
-}

pkgs/top-level/all-packages.nix

@@ -6372,8 +6372,6 @@ with pkgs;
 
   global = callPackage ../development/tools/misc/global { };
 
-  gn = callPackage ../development/tools/build-managers/gn { };
-
   gnome_doc_utils = callPackage ../development/tools/documentation/gnome-doc-utils {};
 
   gnum4 = callPackage ../development/tools/misc/gnum4 { };