Commit compatibility/.bazelrc (#8955)

We initially did not commit this since keeping it in sync is
annoying. We cannot use a symlink because Windows. However, it changes
sufficiently rarely that checking it in + a check that the two are in
sync seems less fragile than the current state.

changelog_begin
changelog_end

.gitignore

@@ -22,7 +22,6 @@ target
 !/bazel-java-deps.bzl
 /compatibility/bazel-*
 !/compatibility/bazel-haskell-deps.bzl
-/compatibility/.bazelrc
 /compatibility/head_sdk/
 .bazelrc.local
 .bazelproject

compatibility/.bazelrc

@@ -0,0 +1,125 @@
+# Bazel distributed cache, can be temporarily disabled by passing the following
+# flag: --noremote_accept_cached
+build:darwin --remote_http_cache=https://bazel-cache.da-ext.net
+build:linux --remote_http_cache=https://bazel-cache.da-ext.net/ubuntu_20_04
+build --remote_upload_local_results=false
+# Enable the disk cache in addition to the http cache.
+build:linux --disk_cache=.bazel-cache/disk
+build:darwin --disk_cache=.bazel-cache/disk
+# `--repository_cache` must be repeated for all relevant actions.
+# TODO: use `common` starting from Bazel 2.2.0
+# See https://github.com/bazelbuild/bazel/issues/11232
+build:linux --repository_cache=.bazel-cache/repo
+fetch:linux --repository_cache=.bazel-cache/repo
+sync:linux --repository_cache=.bazel-cache/repo
+build:darwin --repository_cache=.bazel-cache/repo
+fetch:darwin --repository_cache=.bazel-cache/repo
+sync:darwin --repository_cache=.bazel-cache/repo
+
+build:scala_2_13 --repo_env=DAML_SCALA_VERSION=2.13.3
+fetch:scala_2_13 --repo_env=DAML_SCALA_VERSION=2.13.3
+query:scala_2_13 --repo_env=DAML_SCALA_VERSION=2.13.3
+sync:scala_2_13 --repo_env=DAML_SCALA_VERSION=2.13.3
+
+# Improve remote cache hit rate by exluding environment variables from the
+# sandbox that are not whitelisted using --action_env.
+# This will become the default in a future Bazel release.
+build --experimental_strict_action_env
+
+# Drop the heap size of Bazel to 1 GB and force TLS 1.2.
+# With TLS 1.3, we run into the following error on Darwin.
+# > No subject alternative DNS name matching github-releases.githubusercontent.com found.
+# It looks like this is a result of SNI being broken on TLS 1.3 which results
+# in us getting a certificate for githubassets.com instead.
+startup --host_jvm_args=-Xms1g --host_jvm_args=-Xmx1g --host_jvm_args=-Djdk.tls.client.protocols=TLSv1.2
+
+# Enable sandboxing and caching for exclusive tests
+build --incompatible_exclusive_test_sandboxed
+
+# Print test output of failed test.
+# Set --test_output=streamed to get the output of all tests in real time.
+# Note, this will force tests to run locally and sequentially.
+test --test_output=errors
+
+# print verbose failures
+build --verbose_failures
+
+# Enable persistent Scala workers to improve compilation times.
+# Refer to https://github.com/bazelbuild/rules_scala#readme for details.
+build --strategy=Scalac=worker
+test --strategy=Scalac=worker
+
+# Activate MacOS fix for "ld: illegal thread local variable reference
+#  to regular symbol". See
+#  https://github.com/grpc/grpc/pull/13929/files
+build --copt -DGRPC_BAZEL_BUILD
+
+# Bazel defaults to JDK9. This makes sure we run Nix provided JDK, and
+# avoid dreaded "Unrecognized VM option 'CompactStrings'" error
+build --host_javabase=@java_home//:javabase
+build --java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8
+build --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8
+
+# Do not use a distinct configuration for "host", that is, binaries used
+# at build time should be the same as release binaries.
+# Without this, we will end up building everything twice as we need "damlc"
+# at build time to bootstrap itself (for compiling ghc-prim).
+build --distinct_host_configuration=false
+
+# Propagate locales and the java home to the test environment.
+build --test_env=LANG=en_US.utf8 --test_env=LOCALE_ARCHIVE --test_env=JAVA_HOME
+
+# Disable c-ares support in grpc. We don't need a faster DNS library
+# since we're only connecting to localhost.
+build --define=grpc_no_ares=true
+
+# Pass through cacert information for git.
+build --action_env=GIT_SSL_CAINFO
+# Pass through locale archive to ensure that we can get a UTF-8 locale.
+build:linux --action_env=LOCALE_ARCHIVE
+build:windows --action_env=JAVA_HOME
+
+# Tell bazel to use the nixpkgs Haskell toolchain on Linux and Darwin
+build:linux --host_platform=@rules_haskell//haskell/platforms:linux_x86_64_nixpkgs
+build:darwin --host_platform=@rules_haskell//haskell/platforms:darwin_x86_64_nixpkgs
+# and GHC's gcc on Windows
+build:windows --crosstool_top=@rules_haskell_ghc_windows_amd64//:cc_toolchain
+
+# Caching is currently disabled on Windows.
+# See: https://github.com/tweag/rules_haskell/issues/744 for details.
+build:windows --noremote_accept_cached
+
+# We use a special windows configuration on CI: cache is enabled. The caching
+# is not totally reliable on Windows yet re. absolute paths, but it is not a
+# problem on CI if all builds share a similar directory structure.
+build:windows-ci --remote_accept_cached=true
+
+# The Windows CI machines have 4 physical and 8 logical cores. By default Bazel
+# will parallelize up to the number of logical cores. This can cause flakyness
+# in timing sensitive tests.
+build:windows-ci --jobs=4
+
+# Instruct bazel to globally use this flag for compiling protobuf files.
+# We need the source info for generating proto docs. By default proto_library strips
+# source information and doesn't provide an option to turn this flag on.
+# Ideally we would only set this option for the proto_library target we care about.
+# See https://github.com/bazelbuild/rules_go/issues/1519#issuecomment-451622947
+build:linux --protocopt=--include_source_info
+build:darwin --protocopt=--include_source_info
+#FIXME: it generates stderr, which is causing error in bazel on windows:
+# https://github.com/protocolbuffers/protobuf/blob/master/src/google/protobuf/compiler/command_line_interface.cc#L1363
+#build:windows --protocopt=--include_source_info
+
+# Some tools used in tests, like postgres CLI, require cmd.exe which can be located by them
+# using ComSpec environment variable. By default it's not passed from Bazel client environment.
+test:windows --test_env=ComSpec
+
+# We default to -c opt. We compile Haskell with -O1 anyway since otherwise
+# it is unusably slow and the C deps change rarely so there is little reason
+# to not compile them with optimizations.
+build -c opt
+
+try-import %workspace%/.bazelrc.local
+
+# Get some info from git available to rules with stamp=1
+build --workspace_status_command "bash workspace_status.sh"

fmt.sh

@@ -143,3 +143,9 @@ run scalafmt "${scalafmt_args[@]:-}"
 
 # check for Bazel build files code formatting
 run bazel run "$buildifier_target"
+
+# Note that we cannot use a symlink here because Windows.
+if ! diff .bazelrc compatibility/.bazelrc >/dev/null; then
+    echo ".bazelrc and  compatibility/.bazelrc are out of sync:"
+    diff -u .bazelrc compatibility/.bazelrc
+fi