#!/usr/bin/env bash
# jetstack/trust-manager v0.22.1 - base variant: no-crds
# Path: fetch this entry's retained objects, check their SHA-256, then apply
# them with kubectl. It uses curl, shasum, awk and kubectl. It needs no cub
# CLI and no ConfigHub account.
# Generated by scripts/generate-public-site.mjs from this entry's listing:
# https://confighub.github.io/helm-expt/site/listings/jetstack-trust-manager-v0-22-1-no-crds.json
# Entry page: https://confighub.github.io/helm-expt/site/charts/jetstack-trust-manager-v0-22-1.html
set -euo pipefail

say() { printf '\n>> %s\n' "$*"; }

for tool in curl awk kubectl; do
  if ! command -v "$tool" >/dev/null 2>&1; then
    printf '%s is required and was not found.\n' "$tool" >&2
    exit 1
  fi
done
if command -v shasum >/dev/null 2>&1; then
  sha256_of() { shasum -a 256 "$1" | awk '{print $1}'; }
elif command -v sha256sum >/dev/null 2>&1; then
  sha256_of() { sha256sum "$1" | awk '{print $1}'; }
else
  printf 'shasum is required and was not found.\n' >&2
  exit 1
fi

work=./jetstack-trust-manager-v0-22-1-no-crds-objects
objects_url=https://raw.githubusercontent.com/confighub/helm-expt/main/recipes/jetstack/trust-manager/v0.22.1/revisions/no-crds/r001/rendered/release-objects.yaml
objects_sha256=5d0b08f8abda179089de0d4acead48bd8a3752c16766ed8ef1b95478065e9250

say "Fetch the retained objects into $work/objects.yaml"
mkdir -p "$work"
curl -fsSL -o "$work/objects.yaml" "$objects_url"

say "Check the file against the SHA-256 in the listing"
fetched_sha256="$(sha256_of "$work/objects.yaml")"
if [ "$fetched_sha256" != "$objects_sha256" ]; then
  printf 'The file differs from the listing, so the script stops. Nothing was applied.\n  listing: %s\n  fetched: %s\n' "$objects_sha256" "$fetched_sha256" >&2
  exit 1
fi
printf 'The file matches: sha256 %s\n' "$fetched_sha256"

say "Split the file into its 13 objects. The cluster is untouched so far"
rm -rf "$work/docs" "$work/rest"
mkdir -p "$work/docs" "$work/rest"
awk -v dir="$work/docs" 'BEGIN { n = 0; f = sprintf("%s/doc-%04d.yaml", dir, n) } /^---[ \t]*$/ { close(f); n++; f = sprintf("%s/doc-%04d.yaml", dir, n); next } { print > f }' "$work/objects.yaml"
for n in 0001 0002 0003 0004 0005 0006 0007 0008 0009 0010 0011 0012; do mv "$work/docs/doc-$n.yaml" "$work/rest/"; done
for n in 0013; do mv "$work/docs/doc-$n.yaml" "$work/rest/"; done
ls "$work/rest"

if [ "${REQUIREMENTS_READY:-0}" != "1" ]; then
  say "Stop before applying anything. This entry's plan has 2 steps that an install needs first"
  cat >&2 <<'EOF_REQUIREMENTS'
This script cannot carry out these steps of the plan. They are yours to do, with your own values:
  - The installer package includes these CRDs as prerequisites/target-facts/no-crds-crds.yaml. Apply the missing CRDs server-side and leave existing CRDs under their current owner. The listing gives the rest.
  - Secret default/trust-manager-tls must exist before apply. trust-manager admission webhook TLS material normally produced by the rendered cert-manager Certificate lifecycle.
Nothing was applied. Complete them before you apply the objects.
When they are done, re-run with:
  REQUIREMENTS_READY=1 bash try-objects.sh
EOF_REQUIREMENTS
  exit 1
fi
say "REQUIREMENTS_READY=1 is set. The script takes your word for 2 steps and does not check them"

say "Check that kubectl reaches a cluster"
if ! kubectl get --raw /version >/dev/null 2>&1; then
  printf 'kubectl cannot reach a cluster. Point it at a throwaway cluster and re-run this script.\n' >&2
  exit 1
fi
kubectl config current-context 2>/dev/null || true

serves_kind() {
  kubectl api-resources --api-group="$1" --no-headers 2>/dev/null | awk -v kind="$2" '$NF == kind { found = 1 } END { exit found ? 0 : 1 }'
}

say "Check that the cluster serves the 2 kinds this file uses and does not define"
missing_kinds=""
if ! serves_kind cert-manager.io Certificate; then
  missing_kinds="$missing_kinds Certificate.cert-manager.io"
fi
if ! serves_kind cert-manager.io Issuer; then
  missing_kinds="$missing_kinds Issuer.cert-manager.io"
fi
if [ -n "$missing_kinds" ]; then
  printf 'The cluster does not serve:%s\n' "$missing_kinds" >&2
  printf 'This file uses these kinds and does not define them. Install what defines them, then re-run this script. Nothing was applied.\n' >&2
  exit 1
fi

say "Create the cert-manager namespace if it does not exist"
if ! kubectl get namespace cert-manager >/dev/null 2>&1; then
  kubectl create namespace cert-manager
fi

say "Create the default namespace if it does not exist"
if ! kubectl get namespace default >/dev/null 2>&1; then
  kubectl create namespace default
fi

say "Apply the 13 objects"
kubectl apply -f "$work/rest"

say "Done. kubectl applied the 13 objects of this entry's retained file."
say "The script stops here. It did not wait for any workload to start"
say "Not run by this script: 2 steps of this entry's plan. The entry page says who runs each one."
cat <<'EOF_NOT_RUN'
   - The installer package includes these CRDs as prerequisites/target-facts/no-crds-crds.yaml. Apply the missing CRDs server-side and leave existing CRDs under their current owner. The listing gives the rest.
   - Secret default/trust-manager-tls must exist before apply. trust-manager admission webhook TLS material normally produced by the rendered cert-manager Certificate lifecycle.
EOF_NOT_RUN