Add Cloudflare build script

Author: jeremi

cloudflare_build.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+sudo apt-get update && sudo apt-get install -y graphviz libsasl2-dev libldap2-dev libssl-dev
+
+python -m pip install --upgrade pip
+pip install -r requirements_for_docs.txt
+
+git submodule update --init --recursive
+
+DEFAULT_BRANCH="stable"
+CURRENT_BRANCH="${CF_PAGES_BRANCH:-$DEFAULT_BRANCH}"
+SAFE_BRANCH=$(echo "${CURRENT_BRANCH}" | sed 's/[^a-zA-Z0-9._-]/-/g' | cut -c1-50)
+
+if [ "${CURRENT_BRANCH}" = "${DEFAULT_BRANCH}" ]; then
+  export DOCS_VERSION=stable
+  export DOCS_BASEURL=https://docs.openspp.org/
+  export IS_PREVIEW=0
+else
+  export DOCS_VERSION="${SAFE_BRANCH}"
+  if [ -n "${CF_PAGES_URL:-}" ]; then
+    export DOCS_BASEURL="${CF_PAGES_URL%/}/"
+  else
+    export DOCS_BASEURL="https://docs.openspp.org/previews/${SAFE_BRANCH}/"
+  fi
+  export IS_PREVIEW=1
+fi
+
+sphinx-build -b html docs docs/_build/html
+cp docs/_static/_redirects docs/_build/html/_redirects || true