Support pip packaging

Author: wwwillchen

mesop/pip_package/BUILD

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+# Description:
+#  Tools for building the Mesop pip package.
+
+load("@rules_python//python:py_binary.bzl", "py_binary")
+
+package(
+    default_visibility = ["//build_defs:mesop_internal"],
+)
+
+licenses(["notice"])
+
+genrule(
+    name = "pip_package",
+    # Pip packages are provided in a tarball because we can't statically
+    # know the file names: they must contain the version,
+    # which is only defined in a Python module. Dependents of this
+    # target can extract the tarball and glob its contents.
+    outs = ["pip_packages.tar.gz"],
+    cmd = "$(execpath :build_pip_package) $@",
+    tools = [
+        ":build_pip_package",
+    ],
+)
+
+sh_binary(
+    name = "extract_pip_package",
+    srcs = ["extract_pip_package.sh"],
+    data = [":pip_package"],
+)
+
+sh_binary(
+    name = "build_pip_package",
+    srcs = ["build_pip_package.sh"],
+    data = [
+        "LICENSE",
+        "MANIFEST.in",
+        "README.md",
+        "requirements.txt",
+        "setup.cfg",
+        "setup.py",
+        ":deterministic_tar_gz",
+        "//mesop",  # Main Mesop target
+        "//mesop/cli",  # CLI (which includes data dep on web app)
+        "//mesop/labs",  # Mesop labs target
+    ],
+)
+
+py_binary(
+    name = "deterministic_tar_gz",
+    srcs = ["deterministic_tar_gz.py"],
+    srcs_version = "PY3",
+)

mesop/pip_package/LICENSE

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+
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mesop/pip_package/README.md

@@ -0,0 +1,5 @@
+# Mesop
+
+Mesop is an open-source package to build UIs in Python.
+
+Source code: github.com/google/mesop

mesop/pip_package/__init__.py

@@ -0,0 +1,125 @@
+#!/bin/sh
+# Copyright 2015 The TensorFlow Authors. All Rights Reserved.
+#
+# 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.
+
+usage() {
+  cat <<EOF
+usage: build_pip_package OUTPUT_DIR
+
+Build mesop Pip packages and store the resulting wheel files
+into OUTPUT (a directory or "tar.gz" path).
+
+Arguments:
+  OUTPUT: A path ending in ".tar.gz" for the output archive, or else a
+    path to an existing directory into which to store the wheel files
+    directly.
+EOF
+}
+
+main() {
+  if [ $# -ne 1 ]; then
+    usage 2>&1
+    return 1
+  fi
+  output="$1"
+
+  if [ -z "${RUNFILES+set}" ]; then
+    RUNFILES="$(CDPATH="" cd -- "$0.runfiles" && pwd)"
+  fi
+
+  if [ "$(uname)" = "Darwin" ]; then
+    workdir="$(mktemp -d -t mesop-pip)"
+  else
+    workdir="$(mktemp -d -p /tmp -t mesop-pip.XXXXXXXXXX)"
+  fi
+  original_wd="${PWD}"
+  cd "${workdir}" || return 2
+
+  cleanup() {
+    rm -r "${workdir}"
+  }
+  trap cleanup EXIT
+
+  log_file="${workdir}/log"
+  build >"${log_file}" 2>&1
+  exit_code=$?
+  if [ "${exit_code}" -ne 0 ]; then
+    cat "${log_file}" >&2
+  fi
+  return "${exit_code}"
+}
+
+build() (
+  set -eux
+  if [ "$(uname)" = "Darwin" ]; then
+    sedi="sed -i ''"
+  else
+    sedi="sed -i"
+  fi
+
+  command -v virtualenv >/dev/null
+  [ -d "${RUNFILES}" ]
+
+  cp -LR "${RUNFILES}/mesop/mesop" .
+  cp -LR "${RUNFILES}/rules_python" .
+  mv -f "mesop/pip_package/LICENSE" .
+  mv -f "mesop/pip_package/MANIFEST.in" .
+  mv -f "mesop/pip_package/README.md" .
+  mv -f "mesop/pip_package/requirements.txt" .
+  mv -f "mesop/pip_package/setup.cfg" .
+  mv -f "mesop/pip_package/setup.py" .
+  rm -rf "mesop/pip_package"
+
+  rm -f mesop/mesop  # bazel py_binary sh wrapper
+  chmod -x LICENSE  # bazel symlinks confuse cp
+  find . -name __init__.py -exec chmod -x {} +  # which goes for all genfiles
+
+
+  chmod -R u+w,go+r .
+
+  virtualenv -q -p python3 venv
+  export VIRTUAL_ENV=venv
+  export PATH="${PWD}/venv/bin:${PATH}"
+  unset PYTHON_HOME
+
+  # Require wheel for bdist_wheel command, and setuptools 36.2.0+ so that
+  # env markers are handled (https://github.com/pypa/setuptools/pull/1081)
+  export PYTHONWARNINGS=ignore:DEPRECATION  # suppress Python 2.7 deprecation spam
+  pip install -qU wheel 'setuptools>=36.2.0'
+
+  # Overrides file timestamps in the zip archive to make the build
+  # reproducible. (Date is mostly arbitrary, but must be past 1980 to be
+  # representable in a zip archive.)
+  export SOURCE_DATE_EPOCH=1577836800  # 2020-01-01T00:00:00Z
+
+  python setup.py bdist_wheel --python-tag py3 >/dev/null
+
+  cd "${original_wd}"  # Bazel gives "${output}" as a relative path >_>
+  case "${output}" in
+    *.tar.gz)
+      mkdir -p "$(dirname "${output}")"
+      "${RUNFILES}/mesop/mesop/pip_package/deterministic_tar_gz" \
+          "${output}" "${workdir}"/dist/*.whl
+      ;;
+    *)
+      if ! [ -d "${output}" ]; then
+        printf >&2 'fatal: no such output directory: %s\n' "${output}"
+        return 1
+      fi
+      mv "${workdir}"/dist/*.whl "${output}"
+      ;;
+  esac
+)
+
+main "$@"