[BUILD:env] Changes that seem to get Ubuntu 22.04 working.

* sysconfig module is no longer in distutils in Python 3.10 -- it was
  introduced in Python 3.2 so we can use it for all our platforms of interest.
* Allow a version of scipy that supports Python 3.10

PiperOrigin-RevId: 452125866

.github/workflows/nightly-ubuntu-22.04.yml

@@ -0,0 +1,36 @@
+# https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions
+# See also: https://github.com/marketplace/actions/bazel-action
+
+name: Nightly Ubuntu 22.04
+on:
+  schedule:
+    # Nightly at midnight -- uses UTC, so 7am.
+    - cron:  '0 7 * * *'
+  # This lets us trigger manually from the UI.
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Nightly Ubuntu 22.04
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v3
+        with:
+          path: "~/.cache/bazel"
+          # Create/use a cache called bazel-cache-22_04-<commit hash>
+          # and read the latest cache with prefix bazel-cache-22_04-
+          # if it doesn't already exist.
+          key: bazel-cache-22_04-${{ github.sha }}
+          restore-keys: bazel-cache-22_04-
+      - name: Install bazelisk
+        run: |
+          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.1.0/bazelisk-linux-amd64"
+          mkdir -p "${GITHUB_WORKSPACE}/bin/"
+          mv bazelisk-linux-amd64 "${GITHUB_WORKSPACE}/bin/bazel"
+          chmod +x "${GITHUB_WORKSPACE}/bin/bazel"
+      # Note: xlscc is excluded because it builds Clang, and that can make
+      # builds time out.
+      - name: Bazel Test All (opt)
+        run: |
+          "${GITHUB_WORKSPACE}/bin/bazel" test -c opt -- //xls/... -//xls/contrib/xlscc/...

dependency_support/load_external.bzl

@@ -61,12 +61,13 @@ def load_external_repositories():
         shallow_since = "1635790430 +0000",
     )
 
-    # Commit on 2021-12-03, current as of 2022-05-04
+    # Commit on 2021-12-03, current as of 2022-05-31
     http_archive(
         name = "pybind11_bazel",
         strip_prefix = "pybind11_bazel-72cbbf1fbc830e487e3012862b7b720001b70672",
         urls = ["https://github.com/pybind/pybind11_bazel/archive/72cbbf1fbc830e487e3012862b7b720001b70672.tar.gz"],
         sha256 = "516c1b3a10d87740d2b7de6f121f8e19dde2c372ecbfe59aef44cd1872c10395",
+        patches = ["@com_google_xls//dependency_support/pybind11_bazel:sysconfig_fix.patch"],
     )
 
     http_archive(
@@ -162,11 +163,13 @@ def load_external_repositories():
         build_file = "@com_google_xls//dependency_support/linenoise:bundled.BUILD.bazel",
     )
 
+    # Released on 2022-05-20, current as of 2022-05-31.
+    # https://github.com/grpc/grpc/releases/tag/v1.46.3
     http_archive(
         name = "com_github_grpc_grpc",
-        urls = ["https://github.com/grpc/grpc/archive/v1.43.0.tar.gz"],
-        sha256 = "9647220c699cea4dafa92ec0917c25c7812be51a18143af047e20f3fb05adddc",
-        strip_prefix = "grpc-1.43.0",
+        urls = ["https://github.com/grpc/grpc/archive/v1.46.3.tar.gz"],
+        sha256 = "d6cbf22cb5007af71b61c6be316a79397469c58c82a942552a62e708bce60964",
+        strip_prefix = "grpc-1.46.3",
         # repo_mapping = {"@com_github_google_re2": "@com_googlesource_code_re2"},
         # Note: repo mapping doesn't seem to work for gRPC because it
         # explicitly binds the re2 name to the com_googlesource_code_re2 repo.

dependency_support/pip_requirements.txt

@@ -13,4 +13,4 @@ portpicker==1.3.1
 # versions that we want to support (e.g. 18.04 vs 20.04), so we accept a
 # range that makes successful installation on those platforms possible.
 numpy>=1.21
-scipy>=1.5.4,<=1.6.0
+scipy>=1.5.4,<=1.8.1

dependency_support/pybind11_bazel/BUILD

@@ -0,0 +1,15 @@
+# Copyright 2022 The XLS Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Needed to make this a package.

dependency_support/pybind11_bazel/sysconfig_fix.patch

@@ -0,0 +1,15 @@
+diff --git python_configure.bzl python_configure.bzl
+index 1f5bffa..4225255 100644
+--- python_configure.bzl
++++ python_configure.bzl
+@@ -252,8 +252,8 @@ def _get_python_include(repository_ctx, python_bin):
+             python_bin,
+             "-c",
+             "from __future__ import print_function;" +
+-            "from distutils import sysconfig;" +
+-            "print(sysconfig.get_python_inc())",
++            "import sysconfig; import os; " +
++            "print(os.path.dirname(sysconfig.get_config_h_filename()))",
+         ],
+         error_msg = "Problem getting python include path.",
+         error_details = ("Is the Python binary path set up right? " +

xls/oss/Dockerfile-ubuntu-22.04

@@ -0,0 +1,37 @@
+# NOTE: We try to support Ubuntu 22.04 environment as it is the latest Ubuntu
+LTS release.
+
+# Download base image ubuntu 22.04
+FROM ubuntu:22.04
+
+# LABEL about the custom image
+LABEL version="0.1"
+LABEL description="Docker Image for Building/Testing XLS on Ubuntu 22.04 x86-64"
+
+# Update package info
+RUN apt-get update -y
+
+# Install Bazel
+RUN apt-get install -y curl gnupg && \
+curl -fsSL https://bazel.build/bazel-release.pub.gpg | gpg --dearmor > bazel.gpg && \
+mv bazel.gpg /etc/apt/trusted.gpg.d/ && \
+echo "deb [arch=amd64] https://storage.googleapis.com/bazel-apt stable jdk1.8" | tee /etc/apt/sources.list.d/bazel.list && \
+apt-get update -y && apt-get install -y bazel
+
+# Install dependencies
+RUN apt-get -y install python3-distutils python3-dev python-is-python3 libtinfo5  build-essential liblapack-dev libblas-dev gfortran
+
+# Install development tools
+RUN apt-get install -y git vim
+
+RUN useradd -m xls-developer
+USER xls-developer
+
+# Map the project contents in.
+ADD --chown=xls-developer . /home/xls-developer/xls/
+WORKDIR /home/xls-developer/xls/
+
+
+# Test everything (opt), exclude xlscc for now due to increased build time when
+# we add Clang.
+RUN bazel test -c opt -- //xls/... -//xls/contrib/xlscc/...