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#!/bin/sh
# caddy-deploy.sh — Post-deploy hook for Witryna + Caddy integration
#
# Generates a Caddyfile snippet for the deployed site and reloads Caddy.
# Supports wildcard hosting domains and custom primary domains with redirects.
#
# Env vars from Witryna (automatic):
# WITRYNA_SITE — site name
# WITRYNA_PUBLIC_DIR — stable "current" symlink path (document root)
#
# Env vars from [sites.env] in witryna.toml:
# BASE_DOMAIN — wildcard hosting domain (e.g. mywitrynahost.com)
# PRIMARY_DOMAIN — (optional) custom primary domain
# REDIRECT_DOMAINS — (optional) comma-separated additional redirect domains
# CADDY_SITES_DIR — (optional) where to write configs (default: /etc/caddy/sites.d)
#
# Behavior matrix:
# BASE_DOMAIN set, PRIMARY_DOMAIN not set:
# Serving: {site}.{base}
# Redirects: (none)
#
# BASE_DOMAIN set, PRIMARY_DOMAIN set:
# Serving: PRIMARY_DOMAIN
# Redirects: {site}.{base} + REDIRECT_DOMAINS → PRIMARY_DOMAIN
#
# BASE_DOMAIN not set, PRIMARY_DOMAIN set:
# Serving: PRIMARY_DOMAIN
# Redirects: REDIRECT_DOMAINS → PRIMARY_DOMAIN
#
# Neither set: error
#
# Usage in witryna.toml:
# post_deploy = ["/etc/witryna/hooks/caddy-deploy.sh"]
# [sites.env]
# BASE_DOMAIN = "mywitrynahost.com"
# PRIMARY_DOMAIN = "blog.example.com"
set -eu
SITES_DIR="${CADDY_SITES_DIR:-/etc/caddy/sites.d}"
CADDY_CONFIG="${CADDY_CONFIG:-/etc/caddy/Caddyfile}"
# Validate required env vars
if [ -z "${WITRYNA_SITE:-}" ]; then
echo "ERROR: WITRYNA_SITE is not set" >&2
exit 1
fi
if [ -z "${WITRYNA_PUBLIC_DIR:-}" ]; then
echo "ERROR: WITRYNA_PUBLIC_DIR is not set" >&2
exit 1
fi
# Determine serving domain and redirect domains
auto_domain=""
if [ -n "${BASE_DOMAIN:-}" ]; then
auto_domain="${WITRYNA_SITE}.${BASE_DOMAIN}"
fi
serving_domain=""
redirect_domains=""
if [ -n "${PRIMARY_DOMAIN:-}" ]; then
serving_domain="$PRIMARY_DOMAIN"
# Auto-domain redirects to primary (if base is set)
if [ -n "$auto_domain" ]; then
redirect_domains="$auto_domain"
fi
# Append user-specified redirect domains
if [ -n "${REDIRECT_DOMAINS:-}" ]; then
if [ -n "$redirect_domains" ]; then
redirect_domains="${redirect_domains}, ${REDIRECT_DOMAINS}"
else
redirect_domains="$REDIRECT_DOMAINS"
fi
fi
elif [ -n "$auto_domain" ]; then
serving_domain="$auto_domain"
# No primary → REDIRECT_DOMAINS still apply as redirects to auto_domain
if [ -n "${REDIRECT_DOMAINS:-}" ]; then
redirect_domains="$REDIRECT_DOMAINS"
fi
else
echo "ERROR: at least one of BASE_DOMAIN or PRIMARY_DOMAIN must be set" >&2
exit 1
fi
# Ensure sites directory exists
mkdir -p "$SITES_DIR"
# Generate Caddyfile snippet
config_file="${SITES_DIR}/${WITRYNA_SITE}.caddy"
{
echo "# Managed by witryna caddy-deploy.sh — do not edit"
echo "${serving_domain} {"
echo " root * ${WITRYNA_PUBLIC_DIR}"
echo " file_server"
echo " encode gzip"
echo " header {"
echo " X-Frame-Options \"DENY\""
echo " X-Content-Type-Options \"nosniff\""
echo " Referrer-Policy \"strict-origin-when-cross-origin\""
echo " -Server"
echo " }"
echo "}"
if [ -n "$redirect_domains" ]; then
echo ""
echo "${redirect_domains} {"
echo " redir https://${serving_domain}{uri} permanent"
echo "}"
fi
} > "$config_file"
echo "Wrote Caddy config: $config_file"
# Reload Caddy
caddy reload --config "$CADDY_CONFIG"
echo "Caddy reloaded"
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