branch-and-stage.sh

#!/bin/bash

source "${GITHUB_ACTION_PATH}/util.sh"

# Base changes off the branch being deployed to
set +e
# If the branch exists, check it out
if git ls-remote --exit-code --heads origin "refs/heads/${ENV_BRANCH}"; then
  git checkout "${ENV_BRANCH}" --
else
# If the branch does not exist, create it
  git checkout --orphan "${ENV_BRANCH}" --
  git rm -rf --ignore-unmatch '*'
  set -e
  # Ensure that branch will not be polluted with unrendered YAML
  rm -rf base/ env/
  git commit --allow-empty -m "Initial Commit"
  git push origin "${ENV_BRANCH}"
fi
set -e

git checkout -B "${PUSH_BRANCH}" --

echo "Cleaning staging area..."
git rm -rf --ignore-unmatch '*'
# Ensure that branch will not be polluted with unrendered YAML
rm -rf base/ env/
# Ensure that untracked files are cleaned up
git clean -fd
if is_debug; then
  echo "Post-staging cleanup status:"
  git status
fi

# If there are yaml files in RENDER_DIR (set by kustomize-build.sh), copy them
# to staging and commit, otherwise, output that there are no files in the
# rendered env.
FOUND_YAML=$(find "${RENDER_DIR?}" -name '*.y*ml')
if [[ -n "${FOUND_YAML}" ]]; then
  echo "Moving built k8s manifests into staging area..."
  if is_debug; then
    echo "[DEBUG] YAML files found in ${RENDER_DIR?}:"
    echo "[DEBUG] ${FOUND_YAML}"
  fi
  cp "${RENDER_DIR?}"/*.y*ml .
  git add --all -fv ./*.y*ml
else
  echo "No k8s manifests were built, staging area will be empty."
  # git add the removed files; hopefully no yaml pollution
  git add --all -fv .
fi