orphaned-pr-environments

#!/bin/bash
# -----------------------------------------------------------------------------
# This script checks for orphaned PR environments by listing all PR workspaces
# and checking if the associated PR is closed. If the PR is closed the
# resources in the workspace should have been destroyed and the workspace
# deleted, so existing workspaces for closed PRs are considered orphaned.
# -----------------------------------------------------------------------------
set -euo pipefail

app_name="$1"

echo "::group::Initialize Terraform"
echo terraform -chdir="infra/${app_name}/service" init -input=false -reconfigure -backend-config="dev.s3.tfbackend"
terraform -chdir="infra/${app_name}/service" init -input=false -reconfigure -backend-config="dev.s3.tfbackend"
echo "::endgroup::"

echo "::group::List PRs with PR environments"
echo terraform -chdir="infra/${app_name}/service" workspace list
workspaces="$(terraform -chdir="infra/${app_name}/service" workspace list)"

# Search for workspaces that start with "p-" and extract the PR numbers
# The "|| true" is used to avoid errors if there are no PR environments
pr_nums="$(echo "${workspaces}" | grep -o 'p-[0-9]\+' || true | sed 's/p-//')"
echo "PRs"
echo "${pr_nums}"
echo "::endgroup::"

echo "::group::Check status of each PR"
closed_prs=()
for pr_num in $pr_nums; do
  pr_status="$(gh pr view "$pr_num" --json state --jq ".state")"
  echo "PR ${pr_num}: ${pr_status}"

  if [ "$pr_status" == "CLOSED" ]; then
    closed_prs+=("$pr_num")
  fi
done
echo "::endgroup::"

# if closed_prs is not empty exit with 1 otherwise exit with 0
if [ ${#closed_prs[@]} -gt 0 ]; then
  echo "Found orphaned PR environments for the following PRs: ${closed_prs[*]}"
  echo "Found orphaned PR environments for the following PRs: ${closed_prs[*]}" >> "${GITHUB_STEP_SUMMARY}"
  exit 1
fi

echo "No orphaned PR environments"
echo "No orphaned PR environments" >> "${GITHUB_STEP_SUMMARY}"