From 0bd085f5d6602ab75689156b92af04e7f83d69fd Mon Sep 17 00:00:00 2001
From: Vincent Ambo <tazjin@google.com>
Date: Wed, 27 Nov 2019 15:18:40 +0000
Subject: [PATCH] chore(overrides): Import buildGo.nix from external repository

---
 overrides/buildGo.nix | 151 ++----------------------------------------
 1 file changed, 4 insertions(+), 147 deletions(-)

diff --git a/overrides/buildGo.nix b/overrides/buildGo.nix
index 8e1349bf9..cbccfcec9 100644
--- a/overrides/buildGo.nix
+++ b/overrides/buildGo.nix
@@ -1,147 +1,4 @@
-# Copyright 2019 Google LLC.
-# SPDX-License-Identifier: Apache-2.0
-#
-# buildGo provides Nix functions to build Go packages in the style of Bazel's
-# rules_go.
-#
-# TODO(tazjin): Go through Bazel rules_go options and implement corresponding flags
-# TODO(tazjin): Refactor to include /golang/protobuf/descriptor in goProto deps
-# TODO(tazjin): Find a way to expose documentation (esp. for generated stuff)
-
-{ pkgs, ... }:
-
-let
-  inherit (builtins)
-    attrNames
-    baseNameOf
-    elemAt
-    filter
-    map
-    match
-    readDir
-    replaceStrings
-    toPath;
-
-  inherit (pkgs) lib go runCommand fetchFromGitHub protobuf;
-
-  # Helpers for low-level Go compiler invocations
-  spaceOut = lib.concatStringsSep " ";
-
-  includeDepSrc = dep: "-I ${dep}";
-  includeSources = deps: spaceOut (map includeDepSrc deps);
-
-  includeDepLib = dep: "-L ${dep}";
-  includeLibs = deps: spaceOut (map includeDepLib deps);
-
-  srcBasename = src: elemAt (match "([a-z0-9]{32}\-)?(.*\.go)" (baseNameOf src)) 1;
-  srcCopy = path: src: "cp ${src} $out/${path}/${srcBasename src}";
-  srcList = path: srcs: lib.concatStringsSep "\n" (map (srcCopy path) srcs);
-
-  isGoFile = f: (match ".*\.go" f) != null;
-  isGoTest = f: (match ".*_test\.go" f) != null;
-  goFileFilter = k: v: (v == "regular") && (isGoFile k) && (!isGoTest k);
-  goFilesIn = dir:
-    let files = readDir dir;
-        goFiles = filter (f: goFileFilter f files."${f}") (attrNames files);
-    in map (f: dir + "/" + f) goFiles;
-
-  allDeps = deps: lib.unique (lib.flatten (deps ++ (map (d: d.goDeps) deps)));
-
-  xFlags = x_defs: spaceOut (map (k: "-X ${k}=${x_defs."${k}"}") (attrNames x_defs));
-
-  # High-level build functions
-
-  # Build a Go program out of the specified files and dependencies.
-  program = { name, srcs, deps ? [], x_defs ? {} }:
-  let uniqueDeps = allDeps deps;
-  in runCommand name {} ''
-    ${go}/bin/go tool compile -o ${name}.a -trimpath=$PWD -trimpath=${go} ${includeSources uniqueDeps} ${spaceOut srcs}
-    mkdir -p $out/bin
-    ${go}/bin/go tool link -o $out/bin/${name} -buildid nix ${xFlags x_defs} ${includeLibs uniqueDeps} ${name}.a
-  '';
-
-  # Build a Go library assembled out of the specified files.
-  #
-  # This outputs both the sources and compiled binary, as both are
-  # needed when downstream packages depend on it.
-  package = { name, srcs, deps ? [], path ? name }:
-  let uniqueDeps = allDeps deps;
-  in (runCommand "golib-${name}" {} ''
-    mkdir -p $out/${path}
-    ${srcList path (map (s: "${s}") srcs)}
-    ${go}/bin/go tool compile -o $out/${path}.a -trimpath=$PWD -trimpath=${go} -p ${path} ${includeSources uniqueDeps} ${spaceOut srcs}
-  '') // { goDeps = uniqueDeps; };
-
-  # Build a Go library out of the specified protobuf definition.
-  proto = { name, proto, path ? name, protocFlags ? "", extraDeps ? [] }: package {
-    inherit name path;
-    deps = [ goProto ] ++ extraDeps;
-    srcs = lib.singleton (runCommand "goproto-${name}.pb.go" {} ''
-      cp ${proto} ${baseNameOf proto}
-      ${protobuf}/bin/protoc --plugin=${protocGo}/bin/protoc-gen-go \
-        --go_out=${protocFlags}import_path=${baseNameOf path}:. ${baseNameOf proto}
-      mv *.pb.go $out
-    '');
-  };
-
-  # Protobuf & gRPC integration requires these dependencies:
-  proto-go-src = fetchFromGitHub {
-    owner = "golang";
-    repo = "protobuf";
-    rev = "ed6926b37a637426117ccab59282c3839528a700";
-    sha256 = "0fynqrim022x9xi2bivkw19npbz4316v4yr7mb677s9s36z4dc4h";
-  };
-
-  protoPart = path: deps: package {
-    inherit deps;
-    name = replaceStrings ["/"] ["_"] path;
-    path = "github.com/golang/protobuf/${path}";
-    srcs = goFilesIn (toPath "${proto-go-src}/${path}");
-  };
-
-  goProto =
-    let
-      protobuf = package {
-        name = "protobuf";
-        path = "github.com/golang/protobuf/proto";
-        # TODO(tazjin): How does this build toggle work?
-        srcs = filter
-          (f: (match "(.*)/pointer_reflect.go" f) == null)
-          (goFilesIn (toPath "${proto-go-src}/proto"));
-      };
-      type = name: protoPart "ptypes/${name}" [ protobuf ];
-      descriptor = protoPart "descriptor" [ protobuf ];
-      ptypes = package {
-        name = "ptypes";
-        path = "github.com/golang/protobuf/ptypes";
-        srcs = goFilesIn (toPath "${proto-go-src}/ptypes");
-        deps = map type [
-          "any"
-          "duration"
-          "empty"
-          "struct"
-          "timestamp"
-          "wrappers"
-        ];
-      };
-    in protobuf // { goDeps = allDeps (protobuf.goDeps ++ [ ptypes ]); };
-
-  protocDescriptor = (protoPart "protoc-gen-go/descriptor" [ goProto ]);
-  protocGo =
-    let
-      generator = protoPart "protoc-gen-go/generator" [
-        (protoPart "protoc-gen-go/generator/internal/remap" [])
-        (protoPart "protoc-gen-go/plugin" [ protocDescriptor ])
-      ];
-      grpc = protoPart "protoc-gen-go/grpc" [ generator ];
-    in program {
-      name = "protoc-gen-go";
-      deps = [ goProto grpc generator ];
-      srcs = filter
-        (f: (match "(.*)/doc.go" f) == null)
-        (goFilesIn (toPath "${proto-go-src}/protoc-gen-go"));
-    };
-in {
-  # Only the high-level builder functions are exposed
-  inherit program package proto;
-}
+import "${builtins.fetchGit {
+  url = "https://github.com/tazjin/buildGo.nix";
+  rev = "28e587b348a8aaa7af00a004c05286af9d35ca9a";
+}}/buildGo.nix"