Claude
bec9228c55
Confirmed live: install_frigate()'s fresh-install path overwrote a working, hand-crafted docker-compose.yml (Frigate + mosquitto + frigate-notify) with zero backup, because that file's shape didn't match what frigate.sh's own "existing install" detection knew how to recognize. Every service's own detection is a judgment call about what counts as "already installed" and can miss a real setup built outside this repo's conventions. lib/common.sh gains backup_if_exists(FILE) — copies FILE to FILE.bak.<timestamp> if it exists, no-ops otherwise (including DRY_RUN). Applied before every service's own `cat > docker-compose.yml`/`cat > .env` write across all 60 services that do one (115 call sites), plus a matching standalone-mode stub added to every service's own bootstrap block, same convention already used for port_in_use/find_free_port. This doesn't replace a service's own update/fresh-reinstall detection — it's the safety net underneath it, so a wrong detection costs a .bak file to restore from instead of the original silently disappearing. Also fixes the actual gap that surfaced this: services/frigate.sh's Authelia offer only checked for Authelia installed locally on Frigate's own box, which is never true for a dedicated NVR box with no local Caddy either (the common shape — Caddy lives elsewhere, snippet-generation mode already handles that). Now offers Authelia protection unconditionally and, when Authelia isn't local, asks whether it lives on the same machine as Caddy (still "import authelia", since that's local to wherever Caddy ends up) or on a genuinely separate third machine (the explicit header-pinned forward_auth form, per CLAUDE.md's "forward_auth to a remote Authelia" note, needed because a bare authelia:9091 shortcut only works one hop).
334 lines
12 KiB
Bash
334 lines
12 KiB
Bash
#!/bin/bash
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# services/changedetection.sh — Web page change detection and notification (Changedetection.io).
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# Part of the modular post-install system (sourced by setup.sh).
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#
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# Can also be run standalone on any machine:
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# sudo bash changedetection.sh
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# (Docker must already be installed when run standalone)
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# ── Standalone bootstrap ──────────────────────────────────────────────────────
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if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
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[[ "$(id -u)" == "0" ]] || { echo "Run with sudo: sudo bash $0"; exit 1; }
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_SELF_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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_COMMON="$_SELF_DIR/../lib/common.sh"
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if [[ -f "$_COMMON" ]]; then
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source "$_COMMON"
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else
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log_info() { echo -e "\033[0;34m[INFO]\033[0m $*"; }
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log_success() { echo -e "\033[0;32m[OK]\033[0m $*"; }
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log_warning() { echo -e "\033[1;33m[WARN]\033[0m $*"; }
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log_error() { echo -e "\033[0;31m[ERROR]\033[0m $*" >&2; }
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require_docker() {
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command -v docker &>/dev/null || {
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log_error "Docker not found. Install it first:"
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log_error " curl -fsSL https://get.docker.com | sudo sh"
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return 1
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}
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docker compose version &>/dev/null || {
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log_error "Docker Compose plugin missing:"
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log_error " sudo apt-get install -y docker-compose-plugin"
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return 1
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}
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}
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ensure_docker_dir_ownership() {
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chown -R "$ACTUAL_USER:$ACTUAL_USER" "$@" 2>/dev/null || true
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}
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port_in_use() {
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local _port="$1" _proto="${2:-tcp}"
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local _flag="-tlnH"
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[ "$_proto" = "udp" ] && _flag="-ulnH"
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ss "$_flag" "sport = :${_port}" 2>/dev/null | grep -q .
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}
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find_free_port() {
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local _varname="$1" _port="$2" _proto="${3:-tcp}"
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while port_in_use "$_port" "$_proto"; do
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_port=$((_port + 1))
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done
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eval "$_varname='$_port'"
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}
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prompt_text() {
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local _q="$1" _def="$2" _var="$3" _r
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[[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; }
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read -r -p " $_q " _r
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eval "$_var='${_r:-$_def}'"
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}
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prompt_yn() {
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local _q="$1" _def="$2" _var="$3" _r
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[[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; }
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read -r -p " $_q " _r
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eval "$_var='${_r:-$_def}'"
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}
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configure_caddy_for_service() {
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local _name="$1" _upstream="$2" _subdomain="$3" _extra="${4:-}"
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local _caddy_dir="$DOCKER_DIR/caddy"
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local _caddyfile="$_caddy_dir/Caddyfile"
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local _display_port="${_upstream##*:}"
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# Determine mode: local Caddy, remote Caddy, or none
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local _mode="none"
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[[ -d "$_caddy_dir" ]] && _mode="local"
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[[ -n "${CADDY_REMOTE_HOST:-}" ]] && [[ "$_mode" != "local" ]] && _mode="remote"
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[[ "$_mode" == "none" ]] && {
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log_info "Access $_name directly on port $_display_port."
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return 0
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}
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echo ""
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local _do_caddy=""
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if [[ "$_mode" == "remote" ]]; then
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log_info "Remote Caddy configured (${CADDY_REMOTE_HOST})."
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log_info "A snippet file will be saved to ~/docker/caddy-snippets/."
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fi
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read -r -p " Configure Caddy reverse proxy for $_name? [y/N]: " _do_caddy
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[[ "${_do_caddy,,}" == "y" ]] || {
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log_info "Skipping — access at: http://localhost:$_display_port"
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return 0
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}
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# Domain prompt — pre-fill from SITE_DOMAIN when available
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local _default_domain=""
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if [[ -n "${SITE_DOMAIN:-}" ]] && [[ "$SITE_DOMAIN" != "example.com" ]]; then
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_default_domain="${_subdomain}.${SITE_DOMAIN}"
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log_info "Default: $_default_domain"
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fi
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local _domain=""
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read -r -p " Domain [${_default_domain:-required}]: " _domain
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_domain="${_domain:-$_default_domain}"
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[[ -n "$_domain" ]] || { log_warning "No domain entered — skipping Caddy."; return 0; }
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# Build upstream — remote Caddy uses host IP:port, not container name
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local _block_upstream="$_upstream"
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if [[ "$_mode" == "remote" ]]; then
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_block_upstream="${CADDY_REMOTE_HOST}:${_display_port}"
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fi
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local _site_block
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_site_block="$(cat << CBLOCK
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# $_name
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${_domain} {
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reverse_proxy ${_block_upstream}
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header {
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Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
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X-Content-Type-Options "nosniff"
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X-Frame-Options "SAMEORIGIN"
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Referrer-Policy "strict-origin-when-cross-origin"
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}
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log {
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output file /var/log/caddy/${_domain}.log
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format json
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}
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${_extra}
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}
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CBLOCK
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)"
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if [[ "$_mode" == "local" ]]; then
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if [[ -f "$_caddyfile" ]]; then
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local _bk="$_caddy_dir/Caddyfile.backup.$(date +%Y%m%d-%H%M%S)"
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cp "$_caddyfile" "$_bk"
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log_info "Backed up Caddyfile to $(basename "$_bk")"
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else
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touch "$_caddyfile"
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fi
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if grep -q "^${_domain}" "$_caddyfile" 2>/dev/null; then
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log_warning "$_domain already in Caddyfile"
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local _ow=""
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read -r -p " Overwrite? [y/N]: " _ow
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[[ "${_ow,,}" == "y" ]] || { log_info "Keeping existing entry."; return 0; }
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sed -i "/^${_domain}/,/^}/d" "$_caddyfile"
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fi
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printf '%s\n' "$_site_block" >> "$_caddyfile"
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log_success "Added $_domain to Caddyfile"
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docker exec caddy caddy fmt --overwrite /etc/caddy/Caddyfile 2>/dev/null || true
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if docker exec caddy caddy reload --config /etc/caddy/Caddyfile 2>/dev/null; then
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log_success "$_name accessible at: https://$_domain"
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else
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log_warning "Reload failed — check: docker logs caddy"
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log_info "Manual reload: docker exec caddy caddy reload --config /etc/caddy/Caddyfile"
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fi
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else
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local _snippet_dir="$DOCKER_DIR/caddy-snippets"
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local _snippet_file="$_snippet_dir/${_subdomain}.caddy"
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mkdir -p "$_snippet_dir"
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printf '%s\n' "$_site_block" > "$_snippet_file"
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chown "$ACTUAL_USER:$ACTUAL_USER" "$_snippet_file" 2>/dev/null || true
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log_success "Snippet saved: $_snippet_file"
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log_info "Copy to Caddy machine:"
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log_info " scp $_snippet_file caddy-host:~/caddy-snippets/"
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log_info " rsync -av $_snippet_dir/ caddy-host:~/caddy-snippets/ (all at once)"
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fi
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}
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write_readme() {
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local _dir="$1"; shift
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mkdir -p "$_dir"
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cat > "$_dir/README.md"
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}
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backup_if_exists() {
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local _file="$1"
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[ -f "$_file" ] || return 0
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cp -p "$_file" "${_file}.bak.$(date +%Y%m%d-%H%M%S)" 2>/dev/null
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}
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fi
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ACTUAL_USER="${ACTUAL_USER:-${SUDO_USER:-$USER}}"
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ACTUAL_HOME="$(getent passwd "$ACTUAL_USER" 2>/dev/null | cut -d: -f6 || echo "${HOME:-/root}")"
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DOCKER_DIR="${DOCKER_DIR:-$ACTUAL_HOME/docker}"
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DRY_RUN="${DRY_RUN:-false}"
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UNATTENDED="${UNATTENDED:-false}"
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SITE_TZ="${SITE_TZ:-$(cat /etc/timezone 2>/dev/null || echo UTC)}"
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SITE_DOMAIN="${SITE_DOMAIN:-example.com}"
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SITE_CADDY_NET="${SITE_CADDY_NET:-caddy_net}"
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CADDY_REMOTE_HOST="${CADDY_REMOTE_HOST:-}"
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register_service() { :; }
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_RUN_STANDALONE=1
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fi
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# ─────────────────────────────────────────────────────────────────────────────
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register_service changedetection utilities "Web page change detection and notification (Changedetection.io)" 5000
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install_changedetection() {
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require_docker || return 1
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log_info "Installing Changedetection.io..."
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local CD_DIR="$DOCKER_DIR/changedetection"
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local WEB_PORT="5000"
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if [ "$DRY_RUN" = true ]; then
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echo "[DRY-RUN] Would create $CD_DIR"
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echo "[DRY-RUN] Would write docker-compose.yml and .env"
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echo "[DRY-RUN] Would auto-scan for a free host port"
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return 0
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fi
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# Scan for a free host port — this default (5000) isn't unique to
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# Changedetection.io in this repo (frigate also defaults to 5000), so a
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# plain install shouldn't silently claim a port another already-running
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# service holds. See CLAUDE.md's "Port collision avoidance" section.
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find_free_port WEB_PORT "$WEB_PORT"
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mkdir -p "$CD_DIR/data"
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ensure_docker_dir_ownership "$CD_DIR"
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cd "$CD_DIR" || return 1
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# Mirrors configure_caddy_for_service's own mode resolution (lib/common.sh):
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# explicit CADDY_MODE from the site config wins, then a local ~/docker/caddy,
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# then the legacy CADDY_REMOTE_HOST var. Only "local" joins caddy_net — a
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# remote Caddy box can't resolve container names on this host's bridge
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# network anyway; it reaches this service via the host's published port.
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local _CADDY_MODE="${CADDY_MODE:-none}"
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[ "$_CADDY_MODE" = "none" ] && [ -d "$DOCKER_DIR/caddy" ] && _CADDY_MODE="local"
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[ "$_CADDY_MODE" = "none" ] && [ -n "${CADDY_REMOTE_HOST:-}" ] && _CADDY_MODE="remote"
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local _CADDY_NET_BLOCK=""
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local _CADDY_NET_SECTION=""
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if [ "$_CADDY_MODE" = "local" ]; then
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_CADDY_NET_BLOCK=" networks:
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- caddy_net
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"
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_CADDY_NET_SECTION="
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networks:
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caddy_net:
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external: true
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name: ${SITE_CADDY_NET:-caddy_net}
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"
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fi
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backup_if_exists docker-compose.yml
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cat > docker-compose.yml << CD_COMPOSE
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name: changedetection
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services:
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changedetection:
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image: ghcr.io/dgtlmoon/changedetection.io:latest
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container_name: changedetection
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hostname: changedetection
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restart: unless-stopped
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ports:
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- "${WEB_PORT}:5000"
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environment:
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- BASE_URL=\${BASE_URL}
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- PLAYWRIGHT_DRIVER_URL=ws://playwright-chrome:3000
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volumes:
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- ./data:/datastore
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${_CADDY_NET_BLOCK} depends_on:
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- playwright-chrome
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playwright-chrome:
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image: browserless/chrome:latest
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container_name: playwright-chrome
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hostname: playwright-chrome
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restart: unless-stopped
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environment:
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- DEFAULT_LAUNCH_ARGS=--no-sandbox --disable-dev-shm-usage
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${_CADDY_NET_BLOCK}${_CADDY_NET_SECTION}
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CD_COMPOSE
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backup_if_exists .env
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cat > .env << CD_ENV
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# Changedetection.io environment — edit before starting if needed
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BASE_URL=https://changes.${SITE_DOMAIN}
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CADDY_NET=${SITE_CADDY_NET}
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CD_ENV
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chown -R "$ACTUAL_USER:$ACTUAL_USER" "$CD_DIR"
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chmod 600 "$CD_DIR/.env"
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echo ""
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log_success "Changedetection.io configured at $CD_DIR"
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configure_caddy_for_service "Changedetection" "changedetection:5000" "changes"
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write_readme "$CD_DIR" << MD
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# Changedetection.io
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Monitor web pages for changes and receive notifications via email, Slack,
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Discord, ntfy, and many other channels. Includes a Playwright/Chrome sidecar
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for JavaScript-heavy pages.
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## Access
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- URL: http://localhost:${WEB_PORT}
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- Optional password can be set in Settings → General within the UI.
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## Manage
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\`\`\`bash
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docker compose up -d # start
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docker compose down # stop
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docker compose logs -f # logs
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docker compose pull && docker compose down && docker compose up -d # update
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\`\`\`
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## Environment
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Edit \`.env\` to change \`BASE_URL\` (used for notification links),
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then restart: \`docker compose down && docker compose up -d\`
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MD
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local START_CD=""
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prompt_yn "Start Changedetection.io now? (y/n):" "y" START_CD
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if [ "$START_CD" = "y" ] || [ "$START_CD" = "Y" ]; then
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docker compose up -d 2>/dev/null \
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&& log_success "Changedetection.io started" \
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|| log_warning "Failed to start — check: docker compose logs"
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fi
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echo " Access at: http://localhost:${WEB_PORT}"
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echo ""
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}
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# Run immediately when executed directly (deferred until after function definition)
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[[ "${_RUN_STANDALONE:-0}" == 1 ]] && install_changedetection
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