519 lines
20 KiB
Nix
519 lines
20 KiB
Nix
{ stdenv, callPackage, lib, fetchurl, fetchFromGitHub
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, runCommand, runCommandCC, makeWrapper, recurseIntoAttrs
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# this package (through the fixpoint glass)
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, bazel
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, lr, xe, zip, unzip, bash, writeCBin, coreutils
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, which, gawk, gnused, gnutar, gnugrep, gzip, findutils
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# updater
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, python3, writeScript
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# Apple dependencies
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, cctools, libcxx, CoreFoundation, CoreServices, Foundation
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# Allow to independently override the jdks used to build and run respectively
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, buildJdk, runJdk
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, buildJdkName
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, runtimeShell
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# Downstream packages for tests
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, bazel-watcher
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# Always assume all markers valid (this is needed because we remove markers; they are non-deterministic).
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# Also, don't clean up environment variables (so that NIX_ environment variables are passed to compilers).
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, enableNixHacks ? false
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, gcc-unwrapped
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, autoPatchelfHook
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}:
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let
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version = "0.28.1";
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src = fetchurl {
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url = "https://github.com/bazelbuild/bazel/releases/download/${version}/bazel-${version}-dist.zip";
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sha256 = "0503fax70w7h6v00mkrrrgf1m5n0vkjqs76lyg95alhzc4yldsic";
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};
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# Update with `eval $(nix-build -A bazel.updater)`,
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# then add new dependencies from the dict in ./src-deps.json as required.
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srcDeps = lib.attrsets.attrValues srcDepsSet;
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srcDepsSet =
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let
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srcs = (builtins.fromJSON (builtins.readFile ./src-deps.json));
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toFetchurl = d: lib.attrsets.nameValuePair d.name (fetchurl {
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urls = d.urls;
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sha256 = d.sha256;
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});
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in builtins.listToAttrs (map toFetchurl [
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srcs.desugar_jdk_libs
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srcs.io_bazel_skydoc
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srcs.bazel_skylib
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srcs.io_bazel_rules_sass
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srcs.platforms
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(if stdenv.hostPlatform.isDarwin
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then srcs.${"java_tools_javac11_darwin-v2.0.zip"}
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else srcs.${"java_tools_javac11_linux-v2.0.zip"})
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srcs.${"coverage_output_generator-v1.0.zip"}
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srcs.build_bazel_rules_nodejs
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srcs.${"android_tools_pkg-0.7.tar.gz"}
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]);
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distDir = runCommand "bazel-deps" {} ''
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mkdir -p $out
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for i in ${builtins.toString srcDeps}; do cp $i $out/$(stripHash $i); done
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'';
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defaultShellPath = lib.makeBinPath
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# Keep this list conservative. For more exotic tools, prefer to use
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# @rules_nixpkgs to pull in tools from the nix repository. Example:
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#
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# WORKSPACE:
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#
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# nixpkgs_git_repository(
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# name = "nixpkgs",
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# revision = "def5124ec8367efdba95a99523dd06d918cb0ae8",
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# )
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#
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# # This defines an external Bazel workspace.
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# nixpkgs_package(
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# name = "bison",
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# repositories = { "nixpkgs": "@nixpkgs//:default.nix" },
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# )
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#
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# some/BUILD.bazel:
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#
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# genrule(
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# ...
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# cmd = "$(location @bison//:bin/bison) -other -args",
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# tools = [
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# ...
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# "@bison//:bin/bison",
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# ],
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# )
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#
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[ bash coreutils findutils gawk gnugrep gnutar gnused gzip which unzip ];
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# Java toolchain used for the build and tests
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javaToolchain = "@bazel_tools//tools/jdk:toolchain_host${buildJdkName}";
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platforms = lib.platforms.linux ++ lib.platforms.darwin;
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# This repository is fetched by bazel at runtime
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# however it contains prebuilt java binaries, with wrong interpreter
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# and libraries path.
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# We prefetch it, patch it, and override it in a global bazelrc.
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system = if stdenv.hostPlatform.isDarwin then "darwin" else "linux";
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remote_java_tools = stdenv.mkDerivation {
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name = "remote_java_tools_${system}";
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src = srcDepsSet."java_tools_javac11_${system}-v2.0.zip";
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nativeBuildInputs = [ autoPatchelfHook unzip ];
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buildInputs = [ gcc-unwrapped ];
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sourceRoot = ".";
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buildPhase = ''
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mkdir $out;
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'';
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installPhase = ''
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cp -Ra * $out/
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touch $out/WORKSPACE
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'';
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};
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in
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stdenv.mkDerivation rec {
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name = "bazel-${version}";
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meta = with lib; {
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homepage = "https://github.com/bazelbuild/bazel/";
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description = "Build tool that builds code quickly and reliably";
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license = licenses.asl20;
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maintainers = [ maintainers.mboes ];
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inherit platforms;
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};
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inherit src;
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sourceRoot = ".";
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patches = [
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# On Darwin, the last argument to gcc is coming up as an empty string. i.e: ''
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# This is breaking the build of any C target. This patch removes the last
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# argument if it's found to be an empty string.
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./trim-last-argument-to-gcc-if-empty.patch
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] ++ lib.optional enableNixHacks ./nix-hacks.patch;
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# Additional tests that check bazel’s functionality. Execute
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#
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# nix-build . -A bazel.tests
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#
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# in the nixpkgs checkout root to exercise them locally.
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passthru.tests =
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let
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runLocal = name: attrs: script:
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let
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attrs' = removeAttrs attrs [ "buildInputs" ];
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buildInputs = [ python3 ] ++ (attrs.buildInputs or []);
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in
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runCommandCC name ({
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inherit buildInputs;
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preferLocalBuild = true;
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meta.platforms = platforms;
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} // attrs') script;
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# bazel wants to extract itself into $install_dir/install every time it runs,
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# so let’s do that only once.
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extracted = bazelPkg:
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let install_dir =
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# `install_base` field printed by `bazel info`, minus the hash.
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# yes, this path is kinda magic. Sorry.
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"$HOME/.cache/bazel/_bazel_nixbld";
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in runLocal "bazel-extracted-homedir" { passthru.install_dir = install_dir; } ''
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export HOME=$(mktemp -d)
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touch WORKSPACE # yeah, everything sucks
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install_base="$(${bazelPkg}/bin/bazel info | grep install_base)"
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# assert it’s actually below install_dir
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[[ "$install_base" =~ ${install_dir} ]] \
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|| (echo "oh no! $install_base but we are \
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trying to copy ${install_dir} to $out instead!"; exit 1)
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cp -R ${install_dir} $out
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'';
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bazelTest = { name, bazelScript, workspaceDir, bazelPkg, buildInputs ? [] }:
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let
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be = extracted bazelPkg;
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in runLocal name { inherit buildInputs; } (
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# skip extraction caching on Darwin, because nobody knows how Darwin works
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(lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
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# set up home with pre-unpacked bazel
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export HOME=$(mktemp -d)
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mkdir -p ${be.install_dir}
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cp -R ${be}/install ${be.install_dir}
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# https://stackoverflow.com/questions/47775668/bazel-how-to-skip-corrupt-installation-on-centos6
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# Bazel checks whether the mtime of the install dir files
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# is >9 years in the future, otherwise it extracts itself again.
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# see PosixFileMTime::IsUntampered in src/main/cpp/util
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# What the hell bazel.
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${lr}/bin/lr -0 -U ${be.install_dir} | ${xe}/bin/xe -N0 -0 touch --date="9 years 6 months" {}
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'')
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+
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''
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# Note https://github.com/bazelbuild/bazel/issues/5763#issuecomment-456374609
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# about why to create a subdir for the workspace.
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cp -r ${workspaceDir} wd && chmod u+w wd && cd wd
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${bazelScript}
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touch $out
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'');
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bazelWithNixHacks = bazel.override { enableNixHacks = true; };
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bazel-examples = fetchFromGitHub {
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owner = "bazelbuild";
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repo = "examples";
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rev = "5d8c8961a2516ebf875787df35e98cadd08d43dc";
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sha256 = "03c1bwlq5bs3hg96v4g4pg2vqwhqq6w538h66rcpw02f83yy7fs8";
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};
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in {
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bashTools = callPackage ./bash-tools-test.nix { inherit runLocal bazelTest; };
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cpp = callPackage ./cpp-test.nix { inherit runLocal bazelTest bazel-examples; };
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java = callPackage ./java-test.nix { inherit runLocal bazelTest bazel-examples; };
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protobuf = callPackage ./protobuf-test.nix { inherit runLocal bazelTest; };
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pythonBinPath = callPackage ./python-bin-path-test.nix { inherit runLocal bazelTest; };
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bashToolsWithNixHacks = callPackage ./bash-tools-test.nix { inherit runLocal bazelTest; bazel = bazelWithNixHacks; };
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cppWithNixHacks = callPackage ./cpp-test.nix { inherit runLocal bazelTest bazel-examples; bazel = bazelWithNixHacks; };
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javaWithNixHacks = callPackage ./java-test.nix { inherit runLocal bazelTest bazel-examples; bazel = bazelWithNixHacks; };
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protobufWithNixHacks = callPackage ./protobuf-test.nix { inherit runLocal bazelTest; bazel = bazelWithNixHacks; };
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pythonBinPathWithNixHacks = callPackage ./python-bin-path-test.nix { inherit runLocal bazelTest; bazel = bazelWithNixHacks; };
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# downstream packages using buildBazelPackage
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# fixed-output hashes of the fetch phase need to be spot-checked manually
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downstream = recurseIntoAttrs ({
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inherit bazel-watcher;
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}
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# dm-sonnet is only packaged for linux
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// (lib.optionalAttrs stdenv.isLinux {
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# TODO(timokau) dm-sonnet is broken currently
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# dm-sonnet-linux = python3.pkgs.dm-sonnet;
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}));
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};
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# update the list of workspace dependencies
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passthru.updater = writeScript "update-bazel-deps.sh" ''
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#!${runtimeShell}
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cat ${runCommand "bazel-deps.json" {} ''
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${unzip}/bin/unzip ${src} WORKSPACE
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${python3}/bin/python3 ${./update-srcDeps.py} ./WORKSPACE > $out
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''} > ${builtins.toString ./src-deps.json}
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'';
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# Necessary for the tests to pass on Darwin with sandbox enabled.
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# Bazel starts a local server and needs to bind a local address.
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__darwinAllowLocalNetworking = true;
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# Bazel expects several utils to be available in Bash even without PATH. Hence this hack.
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customBash = writeCBin "bash" ''
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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extern char **environ;
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int main(int argc, char *argv[]) {
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char *path = getenv("PATH");
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char *pathToAppend = "${defaultShellPath}";
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char *newPath;
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if (path != NULL) {
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int length = strlen(path) + 1 + strlen(pathToAppend) + 1;
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newPath = malloc(length * sizeof(char));
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snprintf(newPath, length, "%s:%s", path, pathToAppend);
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} else {
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newPath = pathToAppend;
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}
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setenv("PATH", newPath, 1);
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execve("${bash}/bin/bash", argv, environ);
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return 0;
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}
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'';
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postPatch = let
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darwinPatches = ''
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# Disable Bazel's Xcode toolchain detection which would configure compilers
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# and linkers from Xcode instead of from PATH
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export BAZEL_USE_CPP_ONLY_TOOLCHAIN=1
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# Explicitly configure gcov since we don't have it on Darwin, so autodetection fails
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export GCOV=${coreutils}/bin/false
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# Framework search paths aren't added by bintools hook
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# https://github.com/NixOS/nixpkgs/pull/41914
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export NIX_LDFLAGS="$NIX_LDFLAGS -F${CoreFoundation}/Library/Frameworks -F${CoreServices}/Library/Frameworks -F${Foundation}/Library/Frameworks"
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# libcxx includes aren't added by libcxx hook
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# https://github.com/NixOS/nixpkgs/pull/41589
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export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -isystem ${libcxx}/include/c++/v1"
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# don't use system installed Xcode to run clang, use Nix clang instead
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sed -i -e "s;/usr/bin/xcrun clang;${stdenv.cc}/bin/clang $NIX_CFLAGS_COMPILE $NIX_LDFLAGS -framework CoreFoundation;g" \
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scripts/bootstrap/compile.sh \
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src/tools/xcode/realpath/BUILD \
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src/tools/xcode/stdredirect/BUILD \
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tools/osx/BUILD
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# nixpkgs's libSystem cannot use pthread headers directly, must import GCD headers instead
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sed -i -e "/#include <pthread\/spawn.h>/i #include <dispatch/dispatch.h>" src/main/cpp/blaze_util_darwin.cc
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# clang installed from Xcode has a compatibility wrapper that forwards
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# invocations of gcc to clang, but vanilla clang doesn't
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sed -i -e 's;_find_generic(repository_ctx, "gcc", "CC", overriden_tools);_find_generic(repository_ctx, "clang", "CC", overriden_tools);g' tools/cpp/unix_cc_configure.bzl
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sed -i -e 's;/usr/bin/libtool;${cctools}/bin/libtool;g' tools/cpp/unix_cc_configure.bzl
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wrappers=( tools/cpp/osx_cc_wrapper.sh tools/cpp/osx_cc_wrapper.sh.tpl )
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for wrapper in "''${wrappers[@]}"; do
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sed -i -e "s,/usr/bin/install_name_tool,${cctools}/bin/install_name_tool,g" $wrapper
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done
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'';
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genericPatches = ''
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# Substitute python's stub shebang to plain python path. (see TODO add pr URL)
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# See also `postFixup` where python is added to $out/nix-support
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patchShebangs src/main/java/com/google/devtools/build/lib/bazel/rules/python/python_stub_template.txt \
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--replace "#!/usr/bin/env python" "#!${python3}/bin/python"
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# md5sum is part of coreutils
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sed -i 's|/sbin/md5|md5sum|' \
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src/BUILD
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# substituteInPlace is rather slow, so prefilter the files with grep
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grep -rlZ /bin src/main/java/com/google/devtools | while IFS="" read -r -d "" path; do
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# If you add more replacements here, you must change the grep above!
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# Only files containing /bin are taken into account.
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substituteInPlace "$path" \
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--replace /bin/bash ${customBash}/bin/bash \
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--replace /usr/bin/env ${coreutils}/bin/env \
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--replace /bin/true ${coreutils}/bin/true
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done
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# bazel test runner include references to /bin/bash
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substituteInPlace tools/build_rules/test_rules.bzl \
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--replace /bin/bash ${customBash}/bin/bash
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for i in $(find tools/cpp/ -type f)
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do
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substituteInPlace $i \
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--replace /bin/bash ${customBash}/bin/bash
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done
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# Fixup scripts that generate scripts. Not fixed up by patchShebangs below.
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substituteInPlace scripts/bootstrap/compile.sh \
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--replace /bin/bash ${customBash}/bin/bash
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# add nix environment vars to .bazelrc
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cat >> .bazelrc <<EOF
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build --distdir=${distDir}
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fetch --distdir=${distDir}
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build --copt="$(echo $NIX_CFLAGS_COMPILE | sed -e 's/ /" --copt="/g')"
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build --host_copt="$(echo $NIX_CFLAGS_COMPILE | sed -e 's/ /" --host_copt="/g')"
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build --linkopt="-Wl,$(echo $NIX_LDFLAGS | sed -e 's/ /" --linkopt="-Wl,/g')"
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build --host_linkopt="-Wl,$(echo $NIX_LDFLAGS | sed -e 's/ /" --host_linkopt="-Wl,/g')"
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build --host_javabase='@local_jdk//:jdk'
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build --host_java_toolchain='${javaToolchain}'
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EOF
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# add the same environment vars to compile.sh
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sed -e "/\$command \\\\$/a --copt=\"$(echo $NIX_CFLAGS_COMPILE | sed -e 's/ /" --copt=\"/g')\" \\\\" \
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-e "/\$command \\\\$/a --host_copt=\"$(echo $NIX_CFLAGS_COMPILE | sed -e 's/ /" --host_copt=\"/g')\" \\\\" \
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-e "/\$command \\\\$/a --linkopt=\"-Wl,$(echo $NIX_LDFLAGS | sed -e 's/ /" --linkopt=\"-Wl,/g')\" \\\\" \
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-e "/\$command \\\\$/a --host_linkopt=\"-Wl,$(echo $NIX_LDFLAGS | sed -e 's/ /" --host_linkopt=\"-Wl,/g')\" \\\\" \
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-e "/\$command \\\\$/a --host_javabase='@local_jdk//:jdk' \\\\" \
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-e "/\$command \\\\$/a --host_java_toolchain='${javaToolchain}' \\\\" \
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-i scripts/bootstrap/compile.sh
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# --experimental_strict_action_env (which will soon become the
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# default, see bazelbuild/bazel#2574) hardcodes the default
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# action environment to a value that on NixOS at least is bogus.
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# So we hardcode it to something useful.
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substituteInPlace \
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src/main/java/com/google/devtools/build/lib/bazel/rules/BazelRuleClassProvider.java \
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--replace /bin:/usr/bin ${defaultShellPath}
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# This is necessary to avoid:
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# "error: no visible @interface for 'NSDictionary' declares the selector
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# 'initWithContentsOfURL:error:'"
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# This can be removed when the apple_sdk is upgraded beyond 10.13+
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sed -i '/initWithContentsOfURL:versionPlistUrl/ {
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N
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s/error:nil\];/\];/
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}' tools/osx/xcode_locator.m
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# append the PATH with defaultShellPath in tools/bash/runfiles/runfiles.bash
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echo "PATH=\$PATH:${defaultShellPath}" >> runfiles.bash.tmp
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cat tools/bash/runfiles/runfiles.bash >> runfiles.bash.tmp
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mv runfiles.bash.tmp tools/bash/runfiles/runfiles.bash
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patchShebangs .
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# bazel reads its system bazelrc in /etc
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# override this path to a builtin one
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substituteInPlace \
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src/main/cpp/option_processor.cc \
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--replace BAZEL_SYSTEM_BAZELRC_PATH "\"$out/etc/bazelrc\""
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'';
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in lib.optionalString stdenv.hostPlatform.isDarwin darwinPatches
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+ genericPatches;
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buildInputs = [
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buildJdk
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python3
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];
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|
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# when a command can’t be found in a bazel build, you might also
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# need to add it to `defaultShellPath`.
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nativeBuildInputs = [
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zip
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python3
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unzip
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makeWrapper
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which
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customBash
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] ++ lib.optionals (stdenv.isDarwin) [ cctools libcxx CoreFoundation CoreServices Foundation ];
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# Bazel makes extensive use of symlinks in the WORKSPACE.
|
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# This causes problems with infinite symlinks if the build output is in the same location as the
|
||
# Bazel WORKSPACE. This is why before executing the build, the source code is moved into a
|
||
# subdirectory.
|
||
# Failing to do this causes "infinite symlink expansion detected"
|
||
preBuildPhases = ["preBuildPhase"];
|
||
preBuildPhase = ''
|
||
mkdir bazel_src
|
||
shopt -s dotglob extglob
|
||
mv !(bazel_src) bazel_src
|
||
'';
|
||
|
||
buildPhase = ''
|
||
# Increasing memory during compilation might be necessary.
|
||
# export BAZEL_JAVAC_OPTS="-J-Xmx2g -J-Xms200m"
|
||
./bazel_src/compile.sh
|
||
./bazel_src/scripts/generate_bash_completion.sh \
|
||
--bazel=./bazel_src/output/bazel \
|
||
--output=./bazel_src/output/bazel-complete.bash \
|
||
--prepend=./bazel_src/scripts/bazel-complete-header.bash \
|
||
--prepend=./bazel_src/scripts/bazel-complete-template.bash
|
||
'';
|
||
|
||
installPhase = ''
|
||
mkdir -p $out/bin
|
||
|
||
# official wrapper scripts that searches for $WORKSPACE_ROOT/tools/bazel
|
||
# if it can’t find something in tools, it calls $out/bin/bazel-real
|
||
cp ./bazel_src/scripts/packages/bazel.sh $out/bin/bazel
|
||
mv ./bazel_src/output/bazel $out/bin/bazel-real
|
||
|
||
wrapProgram "$out/bin/bazel" --add-flags --server_javabase="${runJdk}"
|
||
|
||
# generates the system bazelrc
|
||
# warning: the name of the repository depends on the system, hence
|
||
# the reference to .name
|
||
mkdir $out/etc
|
||
echo "build --override_repository=${remote_java_tools.name}=${remote_java_tools}" > $out/etc/bazelrc
|
||
|
||
# shell completion files
|
||
mkdir -p $out/share/bash-completion/completions $out/share/zsh/site-functions
|
||
mv ./bazel_src/output/bazel-complete.bash $out/share/bash-completion/completions/bazel
|
||
cp ./bazel_src/scripts/zsh_completion/_bazel $out/share/zsh/site-functions/
|
||
'';
|
||
|
||
doInstallCheck = true;
|
||
installCheckPhase = ''
|
||
export TEST_TMPDIR=$(pwd)
|
||
|
||
hello_test () {
|
||
$out/bin/bazel test --distdir=${distDir} \
|
||
--test_output=errors \
|
||
--java_toolchain='${javaToolchain}' \
|
||
examples/cpp:hello-success_test \
|
||
examples/java-native/src/test/java/com/example/myproject:hello
|
||
}
|
||
|
||
cd ./bazel_src
|
||
|
||
# test whether $WORKSPACE_ROOT/tools/bazel works
|
||
|
||
mkdir -p tools
|
||
cat > tools/bazel <<"EOF"
|
||
#!${runtimeShell} -e
|
||
exit 1
|
||
EOF
|
||
chmod +x tools/bazel
|
||
|
||
# first call should fail if tools/bazel is used
|
||
! hello_test
|
||
|
||
cat > tools/bazel <<"EOF"
|
||
#!${runtimeShell} -e
|
||
exec "$BAZEL_REAL" "$@"
|
||
EOF
|
||
|
||
# second call succeeds because it defers to $out/bin/bazel-real
|
||
hello_test
|
||
'';
|
||
|
||
# Save paths to hardcoded dependencies so Nix can detect them.
|
||
postFixup = ''
|
||
mkdir -p $out/nix-support
|
||
echo "${customBash} ${defaultShellPath}" >> $out/nix-support/depends
|
||
# The templates get tar’d up into a .jar,
|
||
# so nix can’t detect python is needed in the runtime closure
|
||
echo "${python3}" >> $out/nix-support/depends
|
||
'';
|
||
|
||
dontStrip = true;
|
||
dontPatchELF = true;
|
||
}
|