230 lines
8.0 KiB
Nix
230 lines
8.0 KiB
Nix
{ stdenv
|
||
, bazel
|
||
, cacert
|
||
, lib
|
||
}:
|
||
|
||
let
|
||
bazelPkg = bazel;
|
||
in
|
||
|
||
args@{
|
||
name ? "${args.pname}-${args.version}"
|
||
, bazel ? bazelPkg
|
||
, bazelFlags ? []
|
||
, bazelBuildFlags ? []
|
||
, bazelFetchFlags ? []
|
||
, bazelTarget
|
||
, buildAttrs
|
||
, fetchAttrs
|
||
|
||
# Newer versions of Bazel are moving away from built-in rules_cc and instead
|
||
# allow fetching it as an external dependency in a WORKSPACE file[1]. If
|
||
# removed in the fixed-output fetch phase, building will fail to download it.
|
||
# This can be seen e.g. in #73097
|
||
#
|
||
# This option allows configuring the removal of rules_cc in cases where a
|
||
# project depends on it via an external dependency.
|
||
#
|
||
# [1]: https://github.com/bazelbuild/rules_cc
|
||
, removeRulesCC ? true
|
||
, removeLocalConfigCc ? true
|
||
, removeLocal ? true
|
||
|
||
# Use build --nobuild instead of fetch. This allows fetching the dependencies
|
||
# required for the build as configured, rather than fetching all the dependencies
|
||
# which may not work in some situations (e.g. Java code which ends up relying on
|
||
# Debian-specific /usr/share/java paths, but doesn't in the configured build).
|
||
, fetchConfigured ? true
|
||
|
||
# Don’t add Bazel --copt and --linkopt from NIX_CFLAGS_COMPILE /
|
||
# NIX_LDFLAGS. This is necessary when using a custom toolchain which
|
||
# Bazel wants all headers / libraries to come from, like when using
|
||
# CROSSTOOL. Weirdly, we can still get the flags through the wrapped
|
||
# compiler.
|
||
, dontAddBazelOpts ? false
|
||
, ...
|
||
}:
|
||
|
||
let
|
||
fArgs = removeAttrs args [ "buildAttrs" "fetchAttrs" "removeRulesCC" ];
|
||
fBuildAttrs = fArgs // buildAttrs;
|
||
fFetchAttrs = fArgs // removeAttrs fetchAttrs [ "sha256" ];
|
||
|
||
in stdenv.mkDerivation (fBuildAttrs // {
|
||
inherit name bazelFlags bazelBuildFlags bazelFetchFlags bazelTarget;
|
||
|
||
deps = stdenv.mkDerivation (fFetchAttrs // {
|
||
name = "${name}-deps.tar.gz";
|
||
inherit bazelFlags bazelBuildFlags bazelFetchFlags bazelTarget;
|
||
|
||
impureEnvVars = lib.fetchers.proxyImpureEnvVars;
|
||
|
||
nativeBuildInputs = fFetchAttrs.nativeBuildInputs or [] ++ [ bazel ];
|
||
|
||
preHook = fFetchAttrs.preHook or "" + ''
|
||
export bazelOut="$(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"
|
||
export USER="nix"
|
||
# This is needed for git_repository with https remotes
|
||
export GIT_SSL_CAINFO="${cacert}/etc/ssl/certs/ca-bundle.crt"
|
||
# This is needed for Bazel fetchers that are themselves programs (e.g.
|
||
# rules_go using the go toolchain)
|
||
export SSL_CERT_FILE="${cacert}/etc/ssl/certs/ca-bundle.crt"
|
||
'';
|
||
|
||
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 $USER
|
||
# from the environment. I don't have that variable when building with
|
||
# sandbox enabled. Code here
|
||
# https://github.com/bazelbuild/bazel/blob/9323c57607d37f9c949b60e293b573584906da46/src/main/cpp/startup_options.cc#L123-L124
|
||
#
|
||
# On macOS Bazel will use the system installed Xcode or CLT toolchain instead of the one in the PATH unless we pass BAZEL_USE_CPP_ONLY_TOOLCHAIN
|
||
|
||
# We disable multithreading for the fetching phase since it can lead to timeouts with many dependencies/threads:
|
||
# https://github.com/bazelbuild/bazel/issues/6502
|
||
BAZEL_USE_CPP_ONLY_TOOLCHAIN=1 \
|
||
USER=homeless-shelter \
|
||
bazel \
|
||
--output_base="$bazelOut" \
|
||
--output_user_root="$bazelUserRoot" \
|
||
${if fetchConfigured then "build --nobuild" else "fetch"} \
|
||
--loading_phase_threads=1 \
|
||
$bazelFlags \
|
||
$bazelFetchFlags \
|
||
$bazelTarget
|
||
|
||
runHook postBuild
|
||
'';
|
||
|
||
installPhase = fFetchAttrs.installPhase or ''
|
||
runHook preInstall
|
||
|
||
# Remove all built in external workspaces, Bazel will recreate them when building
|
||
rm -rf $bazelOut/external/{bazel_tools,\@bazel_tools.marker}
|
||
${if removeRulesCC then "rm -rf $bazelOut/external/{rules_cc,\\@rules_cc.marker}" else ""}
|
||
rm -rf $bazelOut/external/{embedded_jdk,\@embedded_jdk.marker}
|
||
${if removeLocalConfigCc then "rm -rf $bazelOut/external/{local_config_cc,\\@local_config_cc.marker}" else ""}
|
||
${if removeLocal then "rm -rf $bazelOut/external/{local_*,\\@local_*.marker}" else ""}
|
||
|
||
# Clear markers
|
||
find $bazelOut/external -name '@*\.marker' -exec sh -c 'echo > {}' \;
|
||
|
||
# Remove all vcs files
|
||
rm -rf $(find $bazelOut/external -type d -name .git)
|
||
rm -rf $(find $bazelOut/external -type d -name .svn)
|
||
rm -rf $(find $bazelOut/external -type d -name .hg)
|
||
|
||
# Removing top-level symlinks along with their markers.
|
||
# This is needed because they sometimes point to temporary paths (?).
|
||
# For example, in Tensorflow-gpu build:
|
||
# platforms -> NIX_BUILD_TOP/tmp/install/35282f5123611afa742331368e9ae529/_embedded_binaries/platforms
|
||
find $bazelOut/external -maxdepth 1 -type l | while read symlink; do
|
||
name="$(basename "$symlink")"
|
||
rm "$symlink"
|
||
test -f "$bazelOut/external/@$name.marker" && rm "$bazelOut/external/@$name.marker" || true
|
||
done
|
||
|
||
# Patching symlinks to remove build directory reference
|
||
find $bazelOut/external -type l | while read symlink; do
|
||
new_target="$(readlink "$symlink" | sed "s,$NIX_BUILD_TOP,NIX_BUILD_TOP,")"
|
||
rm "$symlink"
|
||
ln -sf "$new_target" "$symlink"
|
||
done
|
||
|
||
echo '${bazel.name}' > $bazelOut/external/.nix-bazel-version
|
||
|
||
(cd $bazelOut/ && tar czf $out --sort=name --mtime='@1' --owner=0 --group=0 --numeric-owner external/)
|
||
|
||
runHook postInstall
|
||
'';
|
||
|
||
dontFixup = true;
|
||
allowedRequisites = [];
|
||
|
||
outputHashAlgo = "sha256";
|
||
outputHash = fetchAttrs.sha256;
|
||
});
|
||
|
||
nativeBuildInputs = fBuildAttrs.nativeBuildInputs or [] ++ [ (bazel.override { enableNixHacks = true; }) ];
|
||
|
||
preHook = fBuildAttrs.preHook or "" + ''
|
||
export bazelOut="$NIX_BUILD_TOP/output"
|
||
export bazelUserRoot="$NIX_BUILD_TOP/tmp"
|
||
export HOME="$NIX_BUILD_TOP"
|
||
'';
|
||
|
||
preConfigure = ''
|
||
mkdir -p "$bazelOut"
|
||
|
||
(cd $bazelOut && tar xfz $deps)
|
||
|
||
test "${bazel.name}" = "$(<$bazelOut/external/.nix-bazel-version)" || {
|
||
echo "fixed output derivation was built for a different bazel version" >&2
|
||
echo " got: $(<$bazelOut/external/.nix-bazel-version)" >&2
|
||
echo "expected: ${bazel.name}" >&2
|
||
exit 1
|
||
}
|
||
|
||
chmod -R +w $bazelOut
|
||
find $bazelOut -type l | while read symlink; do
|
||
if [[ $(readlink "$symlink") == *NIX_BUILD_TOP* ]]; then
|
||
ln -sf $(readlink "$symlink" | sed "s,NIX_BUILD_TOP,$NIX_BUILD_TOP,") "$symlink"
|
||
fi
|
||
done
|
||
'' + fBuildAttrs.preConfigure or "";
|
||
|
||
inherit dontAddBazelOpts;
|
||
|
||
buildPhase = fBuildAttrs.buildPhase or ''
|
||
runHook preBuild
|
||
|
||
# Bazel sandboxes the execution of the tools it invokes, so even though we are
|
||
# calling the correct nix wrappers, the values of the environment variables
|
||
# the wrappers are expecting will not be set. So instead of relying on the
|
||
# wrappers picking them up, pass them in explicitly via `--copt`, `--linkopt`
|
||
# and related flags.
|
||
#
|
||
copts=()
|
||
host_copts=()
|
||
linkopts=()
|
||
host_linkopts=()
|
||
if [ -z "''${dontAddBazelOpts:-}" ]; then
|
||
for flag in $NIX_CFLAGS_COMPILE; do
|
||
copts+=( "--copt=$flag" )
|
||
host_copts+=( "--host_copt=$flag" )
|
||
done
|
||
for flag in $NIX_CXXSTDLIB_COMPILE; do
|
||
copts+=( "--copt=$flag" )
|
||
host_copts+=( "--host_copt=$flag" )
|
||
done
|
||
for flag in $NIX_LDFLAGS; do
|
||
linkopts+=( "--linkopt=-Wl,$flag" )
|
||
host_linkopts+=( "--host_linkopt=-Wl,$flag" )
|
||
done
|
||
fi
|
||
|
||
BAZEL_USE_CPP_ONLY_TOOLCHAIN=1 \
|
||
USER=homeless-shelter \
|
||
bazel \
|
||
--output_base="$bazelOut" \
|
||
--output_user_root="$bazelUserRoot" \
|
||
build \
|
||
--curses=no \
|
||
-j $NIX_BUILD_CORES \
|
||
"''${copts[@]}" \
|
||
"''${host_copts[@]}" \
|
||
"''${linkopts[@]}" \
|
||
"''${host_linkopts[@]}" \
|
||
$bazelFlags \
|
||
$bazelBuildFlags \
|
||
$bazelTarget
|
||
|
||
runHook postBuild
|
||
'';
|
||
})
|