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{ stdenv, bazel, enableNixHacks ? true }:
args@{ name, bazelFlags ? [], bazelTarget, buildAttrs, fetchAttrs, ... }:
let
fArgs = removeAttrs args [ "buildAttrs" "fetchAttrs" ];
fBuildAttrs = fArgs // buildAttrs;
fFetchAttrs = fArgs // removeAttrs fetchAttrs [ "sha256" ];
in stdenv.mkDerivation (fBuildAttrs // {
inherit name bazelFlags bazelTarget;
deps = stdenv.mkDerivation (fFetchAttrs // {
name = "${name}-deps";
inherit bazelFlags bazelTarget;
nativeBuildInputs = fFetchAttrs.nativeBuildInputs or [] ++ [ bazel ];
preHook = fFetchAttrs.preHook or "" + ''
export bazelOut="$(echo ''${NIX_BUILD_TOP}/output | sed -e 's,//,/,g')"
export bazelUserRoot="$(echo ''${NIX_BUILD_TOP}/tmp | sed -e 's,//,/,g')"
export HOME="$NIX_BUILD_TOP"
'';
buildPhase = fFetchAttrs.buildPhase or ''
runHook preBuild
# Bazel computes the default value of output_user_root before parsing the
# flag. The computation of the default value involves getting the $USER
# from the environment. I don't have that variable when building with
# sandbox enabled. Code here
# https://github.com/bazelbuild/bazel/blob/9323c57607d37f9c949b60e293b573584906da46/src/main/cpp/startup_options.cc#L123-L124
#
USER=homeless-shelter bazel --output_base="$bazelOut" --output_user_root="$bazelUserRoot" fetch $bazelFlags $bazelTarget
runHook postBuild
'';
installPhase = fFetchAttrs.installPhase or ''
runHook preInstall
# Patching markers to make them deterministic
for i in $bazelOut/external/\@*.marker; do
sed -i 's, -\?[0-9][0-9]*$, 1,' "$i"
done
# Patching symlinks to remove build directory reference
find $bazelOut/external -type l | while read symlink; do
ln -sf $(readlink "$symlink" | sed "s,$NIX_BUILD_TOP,NIX_BUILD_TOP,") "$symlink"
done
cp -r $bazelOut/external $out
runHook postInstall
'';
dontFixup = true;
outputHashMode = "recursive";
outputHashAlgo = "sha256";
outputHash = fetchAttrs.sha256;
});
nativeBuildInputs = fBuildAttrs.nativeBuildInputs or [] ++ [ (if enableNixHacks then (bazel.override { enableNixHacks = true; }) else bazel) ];
preHook = fBuildAttrs.preHook or "" + ''
export bazelOut="$NIX_BUILD_TOP/output"
export bazelUserRoot="$NIX_BUILD_TOP/tmp"
export HOME="$NIX_BUILD_TOP"
'';
preConfigure = ''
mkdir -p $bazelOut/external
cp -r $deps/* $bazelOut/external
chmod -R +w $bazelOut
find $bazelOut -type l | while read symlink; do
ln -sf $(readlink "$symlink" | sed "s,NIX_BUILD_TOP,$NIX_BUILD_TOP,") "$symlink"
done
'' + fBuildAttrs.preConfigure or "";
buildPhase = fBuildAttrs.buildPhase or ''
runHook preBuild
bazel --output_base="$bazelOut" --output_user_root="$bazelUserRoot" build -j $NIX_BUILD_CORES $bazelFlags $bazelTarget
runHook postBuild
'';
})
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