Add pip-compile updater.sh script

Signed-off-by: github.com/clushie <47661139+clushie@users.noreply.github.com>

requirements/updater.sh

@@ -0,0 +1,82 @@
+#!/bin/sh
+set -ue
+
+requirements_in="$(readlink -f ./requirements.in)"
+requirements_ansible_in="$(readlink -f ./requirements_ansible.in)"
+requirements="$(readlink -f ./requirements.txt)"
+requirements_ansible="$(readlink -f ./requirements_ansible.txt)"
+pip_compile="pip-compile --no-header --quiet -r --allow-unsafe"
+
+_cleanup() {
+  cd /
+  test "${KEEP_TMP:-0}" = 1 || rm -rf "${_tmp}"
+}
+
+install_deps() {
+  pip install pip --upgrade
+  pip install pip-tools
+}
+
+generate_requirements_v3() {
+  venv="./venv3"
+  python3 -m venv "${venv}"
+  # shellcheck disable=SC1090
+  . "${venv}/bin/activate"
+
+  install_deps
+
+  ${pip_compile} --output-file requirements.txt "${requirements_in}"
+  ${pip_compile} --output-file requirements_ansible_py3.txt "${requirements_ansible_in}"
+}
+
+generate_requirements_v2() {
+  venv="./venv2"
+  virtualenv -p python2 "${venv}"
+  # shellcheck disable=SC1090
+  PS1="" . "${venv}/bin/activate"
+
+  install_deps
+
+  ${pip_compile} --output-file requirements_ansible.txt "${requirements_ansible_in}"
+}
+
+generate_patch() {
+  a="requirements_ansible_py3.txt"
+  b="requirements_ansible.txt"
+  replace='; python_version < "3" #'
+
+  # most elegant/quick solution I could come up for now
+  out="$(diff --ignore-matching-lines='^#' --unified "${a}" "${b}" | \
+    awk -v replace="${replace}" '{ if (/^+\w/){ $2=replace; print;} else print; }' | \
+    sed 's/ ;/;/g')"
+  test -n "${out}"
+  echo "${out}"
+}
+
+main() {
+  _tmp="$(mktemp -d --suffix .awx-requirements XXXX -p /tmp)"
+  trap _cleanup INT TERM EXIT
+
+  if [ "$1" = "upgrade" ]; then
+      pip_compile="${pip_compile} --upgrade"
+  fi
+
+  cp -vf requirements.txt requirements_ansible.txt "${_tmp}"
+  cp -vf requirements_ansible.txt "${_tmp}/requirements_ansible_py3.txt"
+
+  cd "${_tmp}"
+
+  generate_requirements_v3
+  generate_requirements_v2
+
+  sed -i 's/^docutils.*//g' requirements.txt
+  generate_patch | patch -p4 requirements_ansible_py3.txt
+
+  cp -vf requirements_ansible_py3.txt "${requirements_ansible}"
+  cp -vf requirements.txt "${requirements}"
+
+  _cleanup
+}
+
+# set EVAL=1 in case you want to source this script
+test "${EVAL:-0}" = "1" || main "${1:-}"