#!/usr/bin/env bash
# Publish a report directory to git-pages apex index-site via Traefik (BasicAuth).
# Public URL: https://{PAGES_HOST}/{owner}/{repo}/reports/{sha8}/index.html
set -euo pipefail

REPORT_DIR="${1:-}"
PAGES_HOST="${PAGES_HOST:-}"
GIT_PAGES_PUBLISH_URL="${GIT_PAGES_PUBLISH_URL:-https://pages.helm-dev.keskikuja.site}"
GIT_PAGES_PUBLISH_TOKEN="${GIT_PAGES_PUBLISH_TOKEN:-}"
GIT_PAGES_PUBLISH_USER="${GIT_PAGES_PUBLISH_USER:-publish}"
REPO_SLUG="${GITHUB_REPOSITORY:-}"

[ -n "$REPORT_DIR" ] || { echo "ERROR: report directory argument required" >&2; exit 1; }
[ -d "$REPORT_DIR" ] || { echo "ERROR: not a directory: $REPORT_DIR" >&2; exit 1; }
[ -n "$PAGES_HOST" ] || { echo "ERROR: PAGES_HOST is not set" >&2; exit 1; }
[ -n "$GIT_PAGES_PUBLISH_TOKEN" ] || { echo "ERROR: GIT_PAGES_PUBLISH_TOKEN is not set" >&2; exit 1; }
[ -n "$REPO_SLUG" ] || { echo "ERROR: GITHUB_REPOSITORY is not set" >&2; exit 1; }
[ -n "${GITHUB_SHA:-}" ] || { echo "ERROR: GITHUB_SHA is not set" >&2; exit 1; }

OWNER="${REPO_SLUG%%/*}"
REPO="${REPO_SLUG##*/}"
SHA8="${GITHUB_SHA:0:8}"
REPORT_BASE="https://${PAGES_HOST}/${OWNER}/${REPO}/reports/${SHA8}"

PUBLISH_BASE="${GIT_PAGES_PUBLISH_URL%/}"
PUBLISH_SITE_URL="${PUBLISH_BASE}/"

WORK=$(mktemp -d)
TAR=$(mktemp)
trap 'rm -rf "$WORK" "$TAR"' EXIT

mkdir -p "$WORK/${OWNER}/${REPO}/reports/${SHA8}"
cp -a "$REPORT_DIR/." "$WORK/${OWNER}/${REPO}/reports/${SHA8}/"
cat > "$WORK/${OWNER}/${REPO}/reports/${SHA8}/.meta" <<EOF
{"branch":"${GITHUB_REF_NAME:-}","sha":"${GITHUB_SHA}","published_at":"$(date -u +%Y-%m-%dT%H:%M:%SZ)"}
EOF
find "$WORK/$OWNER" \( -type f -o -type l \) -print | sed "s|^${WORK}/||" | tar -cf "$TAR" -C "$WORK" -T -

publish() {
  local method="$1"
  curl -sS -X "$method" "$PUBLISH_SITE_URL" \
    -u "${GIT_PAGES_PUBLISH_USER}:${GIT_PAGES_PUBLISH_TOKEN}" \
    -H "Content-Type: application/x-tar" \
    -H "Atomic: no" \
    -H "Create-Parents: yes" \
    --data-binary @"$TAR" \
    -o /tmp/git-pages-publish-response.txt \
    -w "%{http_code}"
}

HTTP_CODE=$(publish PATCH)

case "$HTTP_CODE" in
  200|201|204) ;;
  *)
    echo "ERROR: git-pages publish HTTP ${HTTP_CODE}" >&2
    cat /tmp/git-pages-publish-response.txt >&2
    exit 1
    ;;
esac

echo "$REPORT_BASE"