From 787ebb838510d2915283c78758a36f7dab636384 Mon Sep 17 00:00:00 2001
From: Cody Hiar <cody@hiar.ca>
Date: Mon, 8 Nov 2021 10:44:42 -0700
Subject: Initial commit

---
 .gitignore             |   6 +
 README.md              |  21 +++
 myapp/BUILD            |  12 ++
 myapp/myapp.py         |   8 ++
 myapp/requirements.txt |   1 +
 mylib/BUILD            |   1 +
 mylib/__init__.py      |   3 +
 mylib/main.py          |   0
 pants                  | 372 +++++++++++++++++++++++++++++++++++++++++++++++++
 pants.toml             |   9 ++
 10 files changed, 433 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 myapp/BUILD
 create mode 100644 myapp/myapp.py
 create mode 100644 myapp/requirements.txt
 create mode 100644 mylib/BUILD
 create mode 100644 mylib/__init__.py
 create mode 100644 mylib/main.py
 create mode 100755 pants
 create mode 100644 pants.toml

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d2553fc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+# Pants workspace files
+/.pants.d/
+/dist/
+/.pids
+/.pants.workdir.file_lock*
+
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..340104c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,21 @@
+# Sample Pants Project
+
+This is just an example of how to use Pants to manage a monorepo. To run from
+scratch you will need to activate a python interpreter `3.6.15` and the
+following command.
+
+```
+./pants run myapp:pex
+```
+
+or to build a pex
+
+```
+./pants package myapp:pex
+./dist/myapp/pex.pex
+```
+
+Things Tested:
+ - How to include a requirements
+ - How to pin a interpreter version (myapp)
+ - How to include an additional local dependancy (mylib)
diff --git a/myapp/BUILD b/myapp/BUILD
new file mode 100644
index 0000000..4061830
--- /dev/null
+++ b/myapp/BUILD
@@ -0,0 +1,12 @@
+python_library()
+
+# You don't need to pass in 'requirements_relpath' if the file
+# is called 'requirements.txt' but I added this just for explicitness
+python_requirements(requirements_relpath="requirements.txt")
+
+pex_binary(
+    name="pex",
+    dependencies=["mylib"],
+    entry_point="myapp.py",
+    interpreter_constraints=["CPython==3.6.15"],
+)
diff --git a/myapp/myapp.py b/myapp/myapp.py
new file mode 100644
index 0000000..7f5c16b
--- /dev/null
+++ b/myapp/myapp.py
@@ -0,0 +1,8 @@
+import requests
+
+import mylib
+
+
+print(requests.get("https://www.google.com"))
+print(requests.__version__)
+mylib.hello_world()
diff --git a/myapp/requirements.txt b/myapp/requirements.txt
new file mode 100644
index 0000000..7d34355
--- /dev/null
+++ b/myapp/requirements.txt
@@ -0,0 +1 @@
+requests==2.25.0
diff --git a/mylib/BUILD b/mylib/BUILD
new file mode 100644
index 0000000..d80ecb5
--- /dev/null
+++ b/mylib/BUILD
@@ -0,0 +1 @@
+python_library()
diff --git a/mylib/__init__.py b/mylib/__init__.py
new file mode 100644
index 0000000..3f1e31f
--- /dev/null
+++ b/mylib/__init__.py
@@ -0,0 +1,3 @@
+"""My super library."""
+def hello_world():
+    print("Hello World!")
diff --git a/mylib/main.py b/mylib/main.py
new file mode 100644
index 0000000..e69de29
diff --git a/pants b/pants
new file mode 100755
index 0000000..f5b2b80
--- /dev/null
+++ b/pants
@@ -0,0 +1,372 @@
+#!/usr/bin/env bash
+# Copyright 2020 Pants project contributors (see CONTRIBUTORS.md).
+# Licensed under the Apache License, Version 2.0 (see LICENSE).
+
+# =============================== NOTE ===============================
+# This ./pants bootstrap script comes from the pantsbuild/setup
+# project. It is intended to be checked into your code repository so
+# that other developers have the same setup.
+#
+# Learn more here: https://www.pantsbuild.org/docs/installation
+# ====================================================================
+
+set -eou pipefail
+
+# NOTE: To use an unreleased version of Pants from the pantsbuild/pants main branch,
+#  locate the main branch SHA, set PANTS_SHA=<SHA> in the environment, and run this script as usual.
+#
+# E.g., PANTS_SHA=725fdaf504237190f6787dda3d72c39010a4c574 ./pants --version
+
+PYTHON_BIN_NAME="${PYTHON:-unspecified}"
+
+# Set this to specify a non-standard location for this script to read the Pants version from.
+# NB: This will *not* cause Pants itself to use this location as a config file.
+#     You can use PANTS_CONFIG_FILES or --pants-config-files to do so.
+PANTS_TOML=${PANTS_TOML:-pants.toml}
+
+PANTS_BIN_NAME="${PANTS_BIN_NAME:-$0}"
+
+PANTS_SETUP_CACHE="${PANTS_SETUP_CACHE:-${XDG_CACHE_HOME:-$HOME/.cache}/pants/setup}"
+# If given a relative path, we fix it to be absolute.
+if [[ "$PANTS_SETUP_CACHE" != /* ]]; then
+  PANTS_SETUP_CACHE="${PWD}/${PANTS_SETUP_CACHE}"
+fi
+
+PANTS_BOOTSTRAP="${PANTS_SETUP_CACHE}/bootstrap-$(uname -s)-$(uname -m)"
+
+_PEX_VERSION=2.1.42
+_PEX_URL="https://github.com/pantsbuild/pex/releases/download/v${_PEX_VERSION}/pex"
+_PEX_EXPECTED_SHA256="69d6b1b1009b00dd14a3a9f19b72cff818a713ca44b3186c9b12074b2a31e51f"
+
+VIRTUALENV_VERSION=20.4.7
+VIRTUALENV_REQUIREMENTS=$(
+cat << EOF
+virtualenv==${VIRTUALENV_VERSION} --hash sha256:2b0126166ea7c9c3661f5b8e06773d28f83322de7a3ff7d06f0aed18c9de6a76
+filelock==3.0.12 --hash sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836
+six==1.16.0 --hash sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254
+distlib==0.3.2 --hash sha256:23e223426b28491b1ced97dc3bbe183027419dfc7982b4fa2f05d5f3ff10711c
+appdirs==1.4.4 --hash sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128
+importlib-resources==5.1.4; python_version < "3.7" --hash sha256:e962bff7440364183203d179d7ae9ad90cb1f2b74dcb84300e88ecc42dca3351
+importlib-metadata==4.5.0; python_version < "3.8" --hash sha256:833b26fb89d5de469b24a390e9df088d4e52e4ba33b01dc5e0e4f41b81a16c00
+zipp==3.4.1; python_version < "3.10" --hash sha256:51cb66cc54621609dd593d1787f286ee42a5c0adbb4b29abea5a63edc3e03098
+typing-extensions==3.10.0.0; python_version < "3.8" --hash sha256:779383f6086d90c99ae41cf0ff39aac8a7937a9283ce0a414e5dd782f4c94a84
+EOF
+)
+
+COLOR_RED="\x1b[31m"
+COLOR_GREEN="\x1b[32m"
+COLOR_YELLOW="\x1b[33m"
+COLOR_RESET="\x1b[0m"
+
+function log() {
+  echo -e "$@" 1>&2
+}
+
+function die() {
+  (($# > 0)) && log "${COLOR_RED}$*${COLOR_RESET}"
+  exit 1
+}
+
+function green() {
+  (($# > 0)) && log "${COLOR_GREEN}$*${COLOR_RESET}"
+}
+
+function warn() {
+  (($# > 0)) && log "${COLOR_YELLOW}$*${COLOR_RESET}"
+}
+
+function tempdir {
+  mkdir -p "$1"
+  mktemp -d "$1"/pants.XXXXXX
+}
+
+function get_exe_path_or_die {
+  local exe="$1"
+  if ! command -v "${exe}"; then
+    die "Could not find ${exe}. Please ensure ${exe} is on your PATH."
+  fi
+}
+
+function get_pants_config_value {
+  local config_key="$1"
+  local optional_space="[[:space:]]*"
+  local prefix="^${config_key}${optional_space}=${optional_space}"
+  local raw_value
+  raw_value="$(sed -ne "/${prefix}/ s#${prefix}##p" "${PANTS_TOML}")"
+  echo "${raw_value}"  | tr -d \"\' && return 0
+  return 0
+}
+
+function get_python_major_minor_version {
+  local python_exe="$1"
+  "$python_exe" <<EOF
+import sys
+major_minor_version = ''.join(str(version_num) for version_num in sys.version_info[0:2])
+print(major_minor_version)
+EOF
+}
+
+# The high-level flow:
+#
+# 1.) Resolve the Pants version from config so that we know what interpreters we can use, what to name the venv,
+#     and what to install via pip.
+# 2.) Resolve the Python interpreter, first reading from the env var $PYTHON, then using a default based on the Pants
+#     version.
+# 3.) Check if the venv already exists via a naming convention, and create the venv if not found.
+# 4.) Execute Pants with the resolved Python interpreter and venv.
+#
+# After that, Pants itself will handle making sure any requested plugins
+# are installed and up to date.
+
+function determine_pants_version {
+  if [ -n "${PANTS_SHA:-}" ]; then
+    # get_version_for_sha will echo the version, thus "returning" it from this function.
+    get_version_for_sha "$PANTS_SHA"
+    return
+  fi
+
+  pants_version="$(get_pants_config_value 'pants_version')"
+  if [[ -z "${pants_version}" ]]; then
+    die "Please explicitly specify the \`pants_version\` in your \`pants.toml\` under the \`[GLOBAL]\` scope.
+See https://pypi.org/project/pantsbuild.pants/#history for all released versions
+and https://www.pantsbuild.org/docs/installation for more instructions."
+  fi
+  pants_major_version="$(echo "${pants_version}" | cut -d '.' -f1)"
+  pants_minor_version="$(echo "${pants_version}" | cut -d '.' -f2)"
+  # 1.26 is the first version to support `pants.toml`, so we fail eagerly if using an outdated version.
+  if [[ "${pants_major_version}" -eq 1 && "${pants_minor_version}" -le 25 ]]; then
+    die "This version of the \`./pants\` script does not work with Pants <= 1.25.0 (and it also requires using \`pants.toml\`,
+rather than \`pants.ini\`). Instead, either upgrade your \`pants_version\` or use the version of the \`./pants\` script
+at https://raw.githubusercontent.com/Eric-Arellano/setup/0d445edef57cb89fd830db70810e38f050b0a268/pants."
+  fi
+  echo "${pants_version}"
+}
+
+function set_supported_python_versions {
+  local pants_version="$1"
+  local pants_major_version
+  local pants_minor_version
+  pants_major_version="$(echo "${pants_version}" | cut -d '.' -f1)"
+  pants_minor_version="$(echo "${pants_version}" | cut -d '.' -f2)"
+  if [[ "${pants_major_version}" -eq 1 ]]; then
+    supported_python_versions_decimal=('3.6' '3.7' '3.8')
+    supported_python_versions_int=('36' '37' '38')
+    supported_message='3.6, 3.7, or 3.8'
+  elif [[ "${pants_major_version}" -eq 2 && "${pants_minor_version}" -eq 0 ]]; then
+    supported_python_versions_decimal=('3.6' '3.7' '3.8')
+    supported_python_versions_int=('36' '37' '38')
+    supported_message='3.6, 3.7, or 3.8'
+  elif [[ "${pants_major_version}" -eq 2 && "${pants_minor_version}" -eq 1 ]]; then
+    supported_python_versions_decimal=('3.7' '3.8' '3.6')
+    supported_python_versions_int=('37' '38' '36')
+    supported_message='3.7, 3.8, or 3.6 (deprecated)'
+  elif [[ "${pants_major_version}" -eq 2 && "${pants_minor_version}" -lt 5 ]]; then
+    supported_python_versions_decimal=('3.8' '3.7')
+    supported_python_versions_int=('38' '37')
+    supported_message='3.7 or 3.8'
+  else
+    # We put 3.9 first because Apple Silicon only works properly with Python 3.9, even though it's possible to have
+    # older Pythons installed. This makes it more likely that Pants will work out-of-the-box.
+    supported_python_versions_decimal=('3.9' '3.8' '3.7')
+    supported_python_versions_int=('39' '38' '37')
+    supported_message='3.7, 3.8, or 3.9'
+  fi
+}
+
+function check_python_exe_compatible_version {
+  local python_exe="$1"
+  local major_minor_version
+  major_minor_version="$(get_python_major_minor_version "${python_exe}")"
+  for valid_version in "${supported_python_versions_int[@]}"; do
+    if [[ "${major_minor_version}" == "${valid_version}" ]]; then
+      echo "${python_exe}" && return 0
+    fi
+  done
+}
+
+function determine_default_python_exe {
+  for version in "${supported_python_versions_decimal[@]}" "3" ""; do
+    local interpreter_path
+    interpreter_path="$(command -v "python${version}")"
+    if [[ -z "${interpreter_path}" ]]; then
+      continue
+    fi
+    # Check if the Python version is installed via Pyenv but not activated.
+    if [[ "$("${interpreter_path}" --version 2>&1 > /dev/null)" == "pyenv: python${version}"* ]]; then
+      continue
+    fi
+    if [[ -n "$(check_python_exe_compatible_version "${interpreter_path}")" ]]; then
+      echo "${interpreter_path}" && return 0
+    fi
+  done
+}
+
+function determine_python_exe {
+  local pants_version="$1"
+  set_supported_python_versions "${pants_version}"
+  local requirement_str="For \`pants_version = \"${pants_version}\"\`, Pants requires Python ${supported_message} to run."
+
+  local python_exe
+  if [[ "${PYTHON_BIN_NAME}" != 'unspecified' ]]; then
+    python_exe="$(get_exe_path_or_die "${PYTHON_BIN_NAME}")" || exit 1
+    if [[ -z "$(check_python_exe_compatible_version "${python_exe}")" ]]; then
+      die "Invalid Python interpreter version for ${python_exe}. ${requirement_str}"
+    fi
+  else
+    python_exe="$(determine_default_python_exe)"
+    if [[ -z "${python_exe}" ]]; then
+      die "No valid Python interpreter found. ${requirement_str} Please check that a valid interpreter is installed and on your \$PATH."
+    fi
+  fi
+  echo "${python_exe}"
+}
+
+function compute_sha256 {
+  local python="$1"
+  local path="$2"
+
+  "$python" <<EOF
+import hashlib
+
+hasher = hashlib.sha256()
+with open('${path}', 'rb') as fp:
+    buf = fp.read()
+    hasher.update(buf)
+print(hasher.hexdigest())
+EOF
+}
+
+# TODO(John Sirois): GC race loser tmp dirs leftover from bootstrap_XXX
+# functions.  Any tmp dir w/o a symlink pointing to it can go.
+
+function bootstrap_pex {
+  local python="$1"
+  local bootstrapped="${PANTS_BOOTSTRAP}/pex-${_PEX_VERSION}/pex"
+  if [[ ! -f "${bootstrapped}" ]]; then
+    (
+      green "Downloading the Pex PEX."
+      mkdir -p "${PANTS_BOOTSTRAP}"
+      local staging_dir
+      staging_dir=$(tempdir "${PANTS_BOOTSTRAP}")
+      cd "${staging_dir}"
+      curl -LO "${_PEX_URL}"
+      fingerprint="$(compute_sha256 "${python}" "pex")"
+      if [[ "${_PEX_EXPECTED_SHA256}" != "${fingerprint}" ]]; then
+        die "SHA256 of ${_PEX_URL} is not as expected. Aborting."
+      fi
+      green "SHA256 fingerprint of ${_PEX_URL} verified."
+      mkdir -p "$(dirname "${bootstrapped}")"
+      mv -f "${staging_dir}/pex" "${bootstrapped}"
+      rmdir "${staging_dir}"
+    ) 1>&2 || exit 1
+  fi
+  echo "${bootstrapped}"
+}
+
+function scrub_PEX_env_vars {
+  # Ensure the virtualenv PEX runs as shrink-wrapped.
+  # See: https://github.com/pantsbuild/setup/issues/105
+  if [[ -n "${!PEX_@}" ]]; then
+    warn "Scrubbing ${!PEX_@}"
+    unset "${!PEX_@}"
+  fi
+}
+
+function bootstrap_virtualenv {
+  local python="$1"
+  local bootstrapped="${PANTS_BOOTSTRAP}/virtualenv-${VIRTUALENV_VERSION}/virtualenv.pex"
+  if [[ ! -f "${bootstrapped}" ]]; then
+    (
+      green "Creating the virtualenv PEX."
+      pex_path="$(bootstrap_pex "${python}")" || exit 1
+      mkdir -p "${PANTS_BOOTSTRAP}"
+      local staging_dir
+      staging_dir=$(tempdir "${PANTS_BOOTSTRAP}")
+      cd "${staging_dir}"
+      echo "${VIRTUALENV_REQUIREMENTS}" > requirements.txt
+      (
+        scrub_PEX_env_vars
+        "${python}" "${pex_path}" -r requirements.txt -c virtualenv -o virtualenv.pex
+      )
+      mkdir -p "$(dirname "${bootstrapped}")"
+      mv -f "${staging_dir}/virtualenv.pex" "${bootstrapped}"
+      rm -rf "${staging_dir}"
+    ) 1>&2 || exit 1
+  fi
+  echo "${bootstrapped}"
+}
+
+function find_links_url {
+  local pants_version="$1"
+  local pants_sha="$2"
+  echo -n "https://binaries.pantsbuild.org/wheels/pantsbuild.pants/${pants_sha}/${pants_version/+/%2B}/index.html"
+}
+
+function get_version_for_sha {
+  local sha="$1"
+
+  # Retrieve the Pants version associated with this commit.
+  local pants_version
+  pants_version="$(curl --fail -sL "https://raw.githubusercontent.com/pantsbuild/pants/${sha}/src/python/pants/VERSION")"
+
+  # Construct the version as the release version from src/python/pants/VERSION, plus the string `+gitXXXXXXXX`,
+  # where the XXXXXXXX is the first 8 characters of the SHA.
+  echo "${pants_version}+git${sha:0:8}"
+}
+
+function bootstrap_pants {
+  local pants_version="$1"
+  local python="$2"
+  local pants_sha="${3:-}"
+
+  local pants_requirement="pantsbuild.pants==${pants_version}"
+  local maybe_find_links
+  if [[ -z "${pants_sha}" ]]; then
+    maybe_find_links=""
+  else
+    maybe_find_links="--find-links=$(find_links_url "${pants_version}" "${pants_sha}")"
+   fi
+  local python_major_minor_version
+  python_major_minor_version="$(get_python_major_minor_version "${python}")"
+  local target_folder_name="${pants_version}_py${python_major_minor_version}"
+  local bootstrapped="${PANTS_BOOTSTRAP}/${target_folder_name}"
+
+  if [[ ! -d "${bootstrapped}" ]]; then
+    (
+      green "Bootstrapping Pants using ${python}"
+      local staging_dir
+      staging_dir=$(tempdir "${PANTS_BOOTSTRAP}")
+      local virtualenv_path
+      virtualenv_path="$(bootstrap_virtualenv "${python}")" || exit 1
+      green "Installing ${pants_requirement} into a virtual environment at ${bootstrapped}"
+      (
+        scrub_PEX_env_vars
+        # shellcheck disable=SC2086
+        "${python}" "${virtualenv_path}" --no-download "${staging_dir}/install" && \
+        "${staging_dir}/install/bin/pip" install -U pip && \
+        "${staging_dir}/install/bin/pip" install ${maybe_find_links} --progress-bar off "${pants_requirement}"
+      ) && \
+      ln -s "${staging_dir}/install" "${staging_dir}/${target_folder_name}" && \
+      mv "${staging_dir}/${target_folder_name}" "${bootstrapped}" && \
+      green "New virtual environment successfully created at ${bootstrapped}."
+    ) 1>&2 || exit 1
+  fi
+  echo "${bootstrapped}"
+}
+
+# Ensure we operate from the context of the ./pants buildroot.
+cd "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)"
+pants_version="$(determine_pants_version)"
+python="$(determine_python_exe "${pants_version}")"
+pants_dir="$(bootstrap_pants "${pants_version}" "${python}" "${PANTS_SHA:-}")" || exit 1
+
+pants_python="${pants_dir}/bin/python"
+pants_binary="${pants_dir}/bin/pants"
+pants_extra_args=""
+if [[ -n "${PANTS_SHA:-}" ]]; then
+  pants_extra_args="${pants_extra_args} --python-repos-repos=$(find_links_url "$pants_version" "$PANTS_SHA")"
+fi
+
+# shellcheck disable=SC2086
+exec "${pants_python}" "${pants_binary}" ${pants_extra_args} \
+  --pants-bin-name="${PANTS_BIN_NAME}" --pants-version=${pants_version} "$@"
diff --git a/pants.toml b/pants.toml
new file mode 100644
index 0000000..ca4fd82
--- /dev/null
+++ b/pants.toml
@@ -0,0 +1,9 @@
+[GLOBAL]
+pants_version = "2.7.1"
+backend_packages = ["pants.backend.python"]
+
+[anonymous-telemetry]
+enabled = false
+
+[source]
+marker_filenames = [".SOURCE_ROOT"]
-- 
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