Author SHA1 Message Date
Claude 92f8503d48 Add anki-sync-server service — self-hosted Anki flashcard sync
Docker-based sync backend for the Anki app (afrima/anki-sync-server, the
official Rust sync server). Supports multiple independent accounts per
instance, the repo's multi-instance pattern, port collision avoidance,
Caddy wiring, and update/fresh/cancel reinstall detection.

No Authelia gate — this is a raw sync API the Anki client talks to, not
a browser session, so a forward_auth portal in front of it would just
break every sync request; SYNC_USER1/SYNC_USER2/... is its own auth
boundary.

Companion services/anki-sync-server.md covers client setup (Desktop,
AnkiDroid, AnkiMobile) and the Quizlet import/export walkthrough.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014DyceEVVeQ33EeS6C1PDv5
2026-09-09 14:07:31 +00:00
3 changed files with 569 additions and 1 deletions
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@@ -186,7 +186,7 @@ a ready-to-copy Caddy config snippet to `~/docker/caddy-snippets/`.
|-------|---------|
| `base` | `net-tools`, `ncdu`, `git`, `curl`, `wget`, `htop`, `tree`, `zip`/`unzip`, `ca-certificates`, `gnupg`, `jq`, `rsync`; `glow` (terminal markdown reader, Charm apt repo); Docker CE + Compose plugin; `openssh-server` with GitHub/Launchpad SSH key import, optional password-auth lockdown, and SSH Host aliases; optional NetBird overlay network |
| `homelab` | `caddy`, `crowdsec`, `authelia`, `homeassistant`, `asterisk` (own dedicated coturn for TURN/STUN — see `mattermost` below for the other coturn-owning service), `pstn-trunk`, `sms-inbound`, `security-dashboard`, `sunshine`, `vpn-data-mount` (mount existing SMB shares from a NetBird-connected home box — SSH trust bootstrap, then read-only discovery of shares already configured there; never writes to the home box's Samba config; repeatable, pick from any number of a home box's shares in one pass; optional per-share [gocryptfs decrypt layer](#client-side-encryption-for-vpn-data-mount) so the VPS only ever handles ciphertext) |
| `utilities` | `actualbudget`, `ai-gpu`, `ai-stack`, `archivebox`, `beszel` (lightweight server + Docker monitoring — CPU/RAM/disk/network, auto-discovers running containers via the Docker socket; complements Gatus rather than replacing it — Gatus is a black-box HTTP check, Beszel is white-box host/process monitoring), `beszel-agent` (agent-only Beszel install for a remote/homelab box reporting to a hub elsewhere — connects outbound over HTTPS, no VPN/port-forwarding/FQDN needed on that box), `changedetection`, `ddclient`, `filebrowser`, `fmd`, `garage` (self-hosted S3-compatible object storage, single node — MinIO CE's actively-maintained replacement), `garage-webui` (browser-based bucket/object browser for an existing `garage` install — folders/files view, the same kind of thing Backblaze's own web console gives you), `gatus`, `gitea` (self-hosted Git server — raw local clones plus optional two-way GitHub mirror sync, standalone from the `ai-stack` bundle's own Gitea container), `homebox`, `iopaint`, `joplin`, `koha`, `magicmirror`, `mail-archiver`, `mattermost`, `mealie`, `meshcentral`, `n8n`, `nextcloud`, `ntfy`, `onlyoffice`, `paintplus`, `pihole` (standalone DNS ad/tracker blocking — not wired into any VPN's DNS push), `portainer`, `pressbooks` (self-hosted book platform — WordPress Multisite, drag-and-drop chapter editing, PDF export via PrinceXML/DocRaptor, Authelia-gated), `rustdesk`, `samba` (SMB/CIFS file sharing — shares, dedicated Samba users/passwords, LAN-scoped firewall by default; also offered as an optional nudge from `base`), `stirling-pdf`, `syncthing`, `traccar`, `unifi`, `uptimekuma`, `vaultwarden`, `watchyourlan`, `watchtower`, `wg-easy`, `wordpress` (multi-site, dedicated MariaDB per site — blogs, business sites, e-commerce via WooCommerce) |
| `utilities` | `actualbudget`, `ai-gpu`, `ai-stack`, `anki-sync-server` (self-hosted sync backend for the Anki flashcard app — spaced-repetition scheduling stays in the Anki client, this just syncs collections across devices without AnkiWeb; supports multiple independent accounts per instance), `archivebox`, `beszel` (lightweight server + Docker monitoring — CPU/RAM/disk/network, auto-discovers running containers via the Docker socket; complements Gatus rather than replacing it — Gatus is a black-box HTTP check, Beszel is white-box host/process monitoring), `beszel-agent` (agent-only Beszel install for a remote/homelab box reporting to a hub elsewhere — connects outbound over HTTPS, no VPN/port-forwarding/FQDN needed on that box), `changedetection`, `ddclient`, `filebrowser`, `fmd`, `garage` (self-hosted S3-compatible object storage, single node — MinIO CE's actively-maintained replacement), `garage-webui` (browser-based bucket/object browser for an existing `garage` install — folders/files view, the same kind of thing Backblaze's own web console gives you), `gatus`, `gitea` (self-hosted Git server — raw local clones plus optional two-way GitHub mirror sync, standalone from the `ai-stack` bundle's own Gitea container), `homebox`, `iopaint`, `joplin`, `koha`, `magicmirror`, `mail-archiver`, `mattermost`, `mealie`, `meshcentral`, `n8n`, `nextcloud`, `ntfy`, `onlyoffice`, `paintplus`, `pihole` (standalone DNS ad/tracker blocking — not wired into any VPN's DNS push), `portainer`, `pressbooks` (self-hosted book platform — WordPress Multisite, drag-and-drop chapter editing, PDF export via PrinceXML/DocRaptor, Authelia-gated), `rustdesk`, `samba` (SMB/CIFS file sharing — shares, dedicated Samba users/passwords, LAN-scoped firewall by default; also offered as an optional nudge from `base`), `stirling-pdf`, `syncthing`, `traccar`, `unifi`, `uptimekuma`, `vaultwarden`, `watchyourlan`, `watchtower`, `wg-easy`, `wordpress` (multi-site, dedicated MariaDB per site — blogs, business sites, e-commerce via WooCommerce) |
| `media` | `arm`, `audiobookshelf`, `calibre-web`, `emby`, `immich`, `jellyfin`, `lyrion` |
| `cameras` | `frigate`, `frigate-audio`, `frigate-notify`, `sky-cam` |
| `gaming` | `drum-rhythm-game`, `js99er`, `kyber-launcher`, `kyber-server`, `minecraft`, `wolf`, `wolf-pair` |
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## Client setup — pointing Anki at this server instead of AnkiWeb
Every client below needs the **Sync URL** and one of the **accounts** shown
higher up in this README. Do this on every device you want synced — a client
still pointed at AnkiWeb won't see collections synced here, and vice versa.
### Anki Desktop (2.1.66 and newer)
1. **Preferences → Network**
2. Tick **"Self-hosted sync server"**
3. Paste the Sync URL into the field that appears
4. **Sync → log in** with one of the accounts above
### Anki Desktop (older than 2.1.66)
There's no GUI field yet — set an environment variable before launching Anki
instead, then sync normally:
```bash
# Linux/macOS
export SYNC_ENDPOINT="https://your-sync-url/"
anki
# Windows (Command Prompt)
set SYNC_ENDPOINT=https://your-sync-url/
anki.exe
```
Upgrading Anki to 2.1.66+ is the easier long-term fix — do that if you're
setting this up for anyone who isn't comfortable with environment variables.
### AnkiDroid
**Settings → Advanced → Custom sync server**, then enter the Sync URL and
log in with one of the accounts above (AnkiDroid 2.16+; update the app if
this option isn't there).
### AnkiMobile (iOS)
**Settings → Advanced → Custom Sync Server**, same as AnkiDroid — enter the
Sync URL and log in.
### First sync on each device
The very first sync from a device that already has a local collection will
ask whether to upload local data or download from the server — pick upload
from whichever device has your real collection, and download on every other
device, or you'll end up with two different collections that never merge.
## Importing your existing Quizlet sets
This server only handles syncing already-existing Anki collections — it
doesn't import anything itself. Quizlet import happens once, locally, in the
Anki desktop app, before your first sync:
1. **In Quizlet:** open the set → **Export** → choose the plain-text /
tab-separated format (Quizlet's export dialog lets you pick the delimiter
between term and definition, and between rows — tab and newline are the
Anki-friendly defaults) → copy the exported text or download it as a
`.txt`/`.csv` file.
2. **In Anki Desktop:** **File → Import**, pick the file (or paste the text
into a `.txt` file first if you copied it to the clipboard).
3. Map the two columns to **Front** and **Back** in the import dialog, pick
or create the deck and note type, and import.
4. For **math facts or other simple front/back cards**, the Basic note type
is enough. For **more complex cards** (extra example fields, images,
audio, cloze deletions), switch the note type in the import dialog to a
template with more fields, or convert cards afterward — Anki's own
built-in note types (Basic, Basic (and reversed card), Cloze) cover most
of what Quizlet's own card types can do.
5. Sync from this device once the import looks right, so the imported deck
becomes the copy every other device downloads.
### Exporting back out (Anki → Quizlet or anywhere else)
**File → Export**, choose "Notes in Plain Text" and pick the deck — this
produces the same tab-separated format Quizlet's own import expects, so the
round trip works in both directions.
## Why spaced repetition here actually reschedules failed cards
Anki's scheduler (FSRS, the default since recent Anki versions) tracks a
per-card memory-strength estimate and schedules the next review right before
you'd be expected to forget it. Answering "Again" on a card doesn't just
requeue it for later the same session — it lowers that card's estimated
strength, which shortens every subsequent interval for it until you've
proven you know it again, so a card you keep failing gets shown far more
often than one you consistently get right. This is scheduling logic inside
the Anki client itself; this sync server only stores and syncs the resulting
review history, it doesn't change how reviews are scheduled.
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#!/bin/bash
# services/anki-sync-server.sh — Self-hosted Anki flashcard sync server.
# Part of the modular post-install system (sourced by setup.sh).
#
# Can also be run standalone on any machine:
# sudo bash anki-sync-server.sh
# (Docker must already be installed when run standalone)
# ── Standalone bootstrap ──────────────────────────────────────────────────────
# Detected when the script is executed directly rather than sourced by setup.sh.
# Sets up helpers and globals, then defers execution until after the function
# definition at the bottom of this file.
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
[[ "$(id -u)" == "0" ]] || { echo "Run with sudo: sudo bash $0"; exit 1; }
_SELF_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
_COMMON="$_SELF_DIR/../lib/common.sh"
if [[ -f "$_COMMON" ]]; then
# Full repo present — use the real helpers (picks up ~/docker/.config too)
# shellcheck source=../lib/common.sh
source "$_COMMON"
else
# One-off copy — inline minimal stubs so the script works without the repo
log_info() { echo -e "\033[0;34m[INFO]\033[0m $*"; }
log_success() { echo -e "\033[0;32m[OK]\033[0m $*"; }
log_warning() { echo -e "\033[1;33m[WARN]\033[0m $*"; }
log_error() { echo -e "\033[0;31m[ERROR]\033[0m $*" >&2; }
require_docker() {
command -v docker &>/dev/null || {
log_error "Docker not found. Install it first:"
log_error " curl -fsSL https://get.docker.com | sudo sh"
return 1
}
docker compose version &>/dev/null || {
log_error "Docker Compose plugin missing:"
log_error " sudo apt-get install -y docker-compose-plugin"
return 1
}
}
ensure_docker_dir_ownership() {
chown -R "$ACTUAL_USER:$ACTUAL_USER" "$@" 2>/dev/null || true
}
port_in_use() {
local _port="$1" _proto="${2:-tcp}"
local _flag="-tlnH"
[ "$_proto" = "udp" ] && _flag="-ulnH"
ss "$_flag" "sport = :${_port}" 2>/dev/null | grep -q .
}
find_free_port() {
local _varname="$1" _port="$2" _proto="${3:-tcp}"
while port_in_use "$_port" "$_proto"; do
_port=$((_port + 1))
done
eval "$_varname='$_port'"
}
# Match common.sh's eval-based pattern so local vars in install_* are set correctly
prompt_text() {
local _q="$1" _def="$2" _var="$3" _r
[[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; }
read -r -p " $_q " _r
eval "$_var='${_r:-$_def}'"
}
prompt_yn() {
local _q="$1" _def="$2" _var="$3" _r
[[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; }
read -r -p " $_q " _r
eval "$_var='${_r:-$_def}'"
}
prompt_reinstall_mode() {
local _var="$1" _r
if [[ "${UNATTENDED:-false}" == "true" ]]; then eval "$_var='cancel'"; return; fi
echo " Already installed."
read -r -p " (u)pdate / (f)resh reinstall / (c)ancel [c]: " _r
case "${_r,,}" in
u|update) eval "$_var='update'" ;;
f|fresh) eval "$_var='fresh'" ;;
*) eval "$_var='cancel'" ;;
esac
}
generate_password() {
local length="${1:-32}"
openssl rand -base64 48 | tr -dc 'a-zA-Z0-9' | head -c "$length"
}
configure_caddy_for_service() {
local _name="$1" _upstream="$2" _subdomain="$3" _extra="${4:-}"
local _caddy_dir="$DOCKER_DIR/caddy"
local _caddyfile="$_caddy_dir/Caddyfile"
local _display_port="${_upstream##*:}"
# Determine mode: local Caddy, remote Caddy, or none
local _mode="none"
[[ -d "$_caddy_dir" ]] && _mode="local"
[[ -n "${CADDY_REMOTE_HOST:-}" ]] && [[ "$_mode" != "local" ]] && _mode="remote"
[[ "$_mode" == "none" ]] && {
log_info "Access $_name directly on port $_display_port."
return 0
}
echo ""
local _do_caddy=""
if [[ "$_mode" == "remote" ]]; then
log_info "Remote Caddy configured (${CADDY_REMOTE_HOST})."
log_info "A snippet file will be saved to ~/docker/caddy-snippets/."
fi
read -r -p " Configure Caddy reverse proxy for $_name? [y/N]: " _do_caddy
[[ "${_do_caddy,,}" == "y" ]] || {
log_info "Skipping — access at: http://localhost:$_display_port"
return 0
}
# Domain prompt — pre-fill from SITE_DOMAIN when available
local _default_domain=""
if [[ -n "${SITE_DOMAIN:-}" ]] && [[ "$SITE_DOMAIN" != "example.com" ]]; then
_default_domain="${_subdomain}.${SITE_DOMAIN}"
log_info "Default: $_default_domain"
fi
local _domain=""
read -r -p " Domain [${_default_domain:-required}]: " _domain
_domain="${_domain:-$_default_domain}"
[[ -n "$_domain" ]] || { log_warning "No domain entered — skipping Caddy."; return 0; }
# Build upstream — remote Caddy uses host IP:port, not container name
local _block_upstream="$_upstream"
if [[ "$_mode" == "remote" ]]; then
_block_upstream="${CADDY_REMOTE_HOST}:${_display_port}"
fi
local _site_block
_site_block="$(cat << CBLOCK
# $_name
${_domain} {
reverse_proxy ${_block_upstream}
header {
Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
X-Content-Type-Options "nosniff"
X-Frame-Options "SAMEORIGIN"
Referrer-Policy "strict-origin-when-cross-origin"
}
log {
output file /var/log/caddy/${_domain}.log
format json
}
${_extra}
}
CBLOCK
)"
if [[ "$_mode" == "local" ]]; then
if [[ -f "$_caddyfile" ]]; then
local _bk="$_caddy_dir/Caddyfile.backup.$(date +%Y%m%d-%H%M%S)"
cp "$_caddyfile" "$_bk"
log_info "Backed up Caddyfile to $(basename "$_bk")"
else
touch "$_caddyfile"
fi
if grep -q "^${_domain}" "$_caddyfile" 2>/dev/null; then
log_warning "$_domain already in Caddyfile"
local _ow=""
read -r -p " Overwrite? [y/N]: " _ow
[[ "${_ow,,}" == "y" ]] || { log_info "Keeping existing entry."; return 0; }
sed -i "/^${_domain}/,/^}/d" "$_caddyfile"
fi
printf '%s\n' "$_site_block" >> "$_caddyfile"
log_success "Added $_domain to Caddyfile"
docker exec caddy caddy fmt --overwrite /etc/caddy/Caddyfile 2>/dev/null || true
if docker exec caddy caddy reload --config /etc/caddy/Caddyfile 2>/dev/null; then
log_success "$_name accessible at: https://$_domain"
else
log_warning "Reload failed — check: docker logs caddy"
log_info "Manual reload: docker exec caddy caddy reload --config /etc/caddy/Caddyfile"
fi
else
local _snippet_dir="$DOCKER_DIR/caddy-snippets"
local _snippet_file="$_snippet_dir/${_subdomain}.caddy"
mkdir -p "$_snippet_dir"
printf '%s\n' "$_site_block" > "$_snippet_file"
chown "$ACTUAL_USER:$ACTUAL_USER" "$_snippet_file" 2>/dev/null || true
log_success "Snippet saved: $_snippet_file"
log_info "Copy to Caddy machine:"
log_info " scp $_snippet_file caddy-host:~/caddy-snippets/"
log_info " rsync -av $_snippet_dir/ caddy-host:~/caddy-snippets/ (all at once)"
fi
}
write_readme() {
local _dir="$1"; shift
mkdir -p "$_dir"
cat > "$_dir/README.md"
}
backup_if_exists() {
local _file="$1"
[ -f "$_file" ] || return 0
cp -p "$_file" "${_file}.bak.$(date +%Y%m%d-%H%M%S)" 2>/dev/null
}
fi
# Globals — ACTUAL_USER/ACTUAL_HOME must come before DOCKER_DIR
# ($HOME under sudo is /root, not the real user's home)
ACTUAL_USER="${ACTUAL_USER:-${SUDO_USER:-$USER}}"
ACTUAL_HOME="$(getent passwd "$ACTUAL_USER" 2>/dev/null | cut -d: -f6 || echo "${HOME:-/root}")"
DOCKER_DIR="${DOCKER_DIR:-$ACTUAL_HOME/docker}"
DRY_RUN="${DRY_RUN:-false}"
UNATTENDED="${UNATTENDED:-false}"
SITE_TZ="${SITE_TZ:-$(cat /etc/timezone 2>/dev/null || echo UTC)}"
SITE_DOMAIN="${SITE_DOMAIN:-example.com}"
SITE_CADDY_NET="${SITE_CADDY_NET:-caddy_net}"
register_service() { :; } # no-op — no wizard to register into
_RUN_STANDALONE=1
fi
# ─────────────────────────────────────────────────────────────────────────────
register_service anki-sync-server utilities "Self-hosted Anki flashcard sync server (spaced repetition, syncs across devices without AnkiWeb)" 8080
install_anki-sync-server() {
require_docker || return 1
log_info "Installing Anki Sync Server..."
# ── Instance selection ───────────────────────────────────────────────────
# First instance keeps the plain "anki-sync-server" name/paths/port exactly
# as before (zero behavior change for anyone with a single instance). Only
# asking to add a second one introduces suffixed naming — same pattern as
# services/ntfy.sh and services/homebox.sh. A second instance is a real
# use case here (e.g. a second household wanting fully separate data on
# the same box) even though one instance already supports multiple
# independent accounts via SYNC_USER1/SYNC_USER2/... — see CLAUDE.md's
# "Multi-instance services" section.
local ANKI_DIR="$DOCKER_DIR/anki-sync-server"
local INSTANCE_SUFFIX="" CONTAINER="anki-sync-server"
local WEB_PORT="8080"
if [ "$DRY_RUN" = true ]; then
echo "[DRY-RUN] Would offer to add a new, separate instance if one already exists"
echo "[DRY-RUN] Would create $ANKI_DIR(-<name>)"
echo "[DRY-RUN] Would prompt for one or more sync accounts and generate passwords"
echo "[DRY-RUN] Would write docker-compose.yml and .env"
echo "[DRY-RUN] Would auto-scan for a free host port"
return 0
fi
if [ -d "$ANKI_DIR" ]; then
echo ""
echo " Anki Sync Server is already installed at $ANKI_DIR."
echo " 1) Manage that install (update / full reinstall / cancel)"
echo " 2) Add a NEW, separate Anki Sync Server instance alongside it (its"
echo " own data and port — full isolation)"
echo ""
local _TOP_CHOICE=""
prompt_text " Choice [1/2]:" "1" _TOP_CHOICE
if [ "$_TOP_CHOICE" = "2" ]; then
local _suffix=""
while true; do
prompt_text " Short name for the new instance (letters/numbers/hyphens, e.g. 'family'):" "" _suffix
_suffix="$(echo "$_suffix" | tr -cs 'a-zA-Z0-9-' '-' | sed 's/^-*//;s/-*$//')"
if [ -z "$_suffix" ]; then
log_warning "Name can't be empty."; continue
fi
if [ -d "$DOCKER_DIR/anki-sync-server-$_suffix" ]; then
log_warning "anki-sync-server-$_suffix already exists — pick another name."; continue
fi
break
done
INSTANCE_SUFFIX="$_suffix"
ANKI_DIR="$DOCKER_DIR/anki-sync-server-$_suffix"
CONTAINER="anki-sync-server-$_suffix"
log_info "New instance: $ANKI_DIR"
else
# "Manage that install" on THIS instance — the banner above promises
# update/fresh/cancel, so actually offer it instead of falling straight
# through into the same unconditional-overwrite flow as a new install.
if [[ -f "$ANKI_DIR/docker-compose.yml" ]]; then
local MODE=""
prompt_reinstall_mode MODE
case "$MODE" in
update)
log_info "Refreshing the Anki Sync Server image only — existing accounts, port, and Caddy setup are left as-is."
( cd "$ANKI_DIR" && docker compose pull && docker compose up -d ) \
&& log_success "Anki Sync Server image refreshed" \
|| log_warning "Refresh failed — check: docker compose -f $ANKI_DIR/docker-compose.yml logs"
return 0
;;
cancel)
log_info "Leaving the existing install as-is."
return 0
;;
fresh) ;; # fall through to the full install flow below
esac
fi
fi
fi
# Scan for a free port unconditionally — not just when adding an explicit
# additional instance. A plain first install can just as easily collide
# with an unrelated service that already claimed this default port — see
# CLAUDE.md's "Port collision avoidance" section.
find_free_port WEB_PORT "$WEB_PORT"
# ── Sync accounts ─────────────────────────────────────────────────────────
# The official sync server has no signup flow of its own — accounts are
# fixed credentials baked in as SYNC_USER1, SYNC_USER2, ... at container
# start, one per line in .env. Ask for at least one now (each Anki client
# — desktop, AnkiDroid, AnkiMobile — logs in with one of these) and offer
# to add more for other people sharing this box, since a single instance
# already keeps each account's collection completely separate.
local ANKI_USERS=() ANKI_PASSWORDS=()
local _u=""
prompt_text " Username for your Anki sync account:" "$ACTUAL_USER" _u
ANKI_USERS+=("$_u")
ANKI_PASSWORDS+=("$(generate_password 24)")
while true; do
local _more=""
prompt_yn " Add another Anki sync account (e.g. for a family member)? (y/n):" "n" _more
[[ "$_more" =~ ^[Yy]$ ]] || break
prompt_text " Username for the additional account:" "" _u
if [ -z "$_u" ]; then
log_warning "Name can't be empty."; continue
fi
ANKI_USERS+=("$_u")
ANKI_PASSWORDS+=("$(generate_password 24)")
if [ "${#ANKI_USERS[@]}" -ge 8 ]; then
log_warning "That's plenty — stopping at 8 accounts. Add more later by editing .env and re-running 'docker compose up -d'."
break
fi
done
mkdir -p "$ANKI_DIR/data"
ensure_docker_dir_ownership "$ANKI_DIR"
cd "$ANKI_DIR" || return 1
# Mirrors configure_caddy_for_service's own mode resolution (lib/common.sh):
# explicit CADDY_MODE from the site config wins, then a local ~/docker/caddy,
# then the legacy CADDY_REMOTE_HOST var. Only "local" joins caddy_net — a
# remote Caddy box can't resolve container names on this host's bridge
# network anyway; it reaches this service via the host's published port.
local _CADDY_MODE="${CADDY_MODE:-none}"
[ "$_CADDY_MODE" = "none" ] && [ -d "$DOCKER_DIR/caddy" ] && _CADDY_MODE="local"
[ "$_CADDY_MODE" = "none" ] && [ -n "${CADDY_REMOTE_HOST:-}" ] && _CADDY_MODE="remote"
local _CADDY_NET_BLOCK=""
local _CADDY_NET_SECTION=""
if [ "$_CADDY_MODE" = "local" ]; then
_CADDY_NET_BLOCK=" networks:
- caddy_net
"
_CADDY_NET_SECTION="
networks:
caddy_net:
external: true
name: ${SITE_CADDY_NET:-caddy_net}
"
fi
# Build the SYNC_USERn=... lines for docker-compose.yml (compose-time
# interpolation of ${ANKI_SYNC_USERn}/${ANKI_SYNC_PASSWORDn} from .env —
# same \${VAR} pattern services/homebox.sh uses for its own .env values)
# and the matching ANKI_SYNC_USERn/ANKI_SYNC_PASSWORDn lines for .env.
local _COMPOSE_USER_LINES="" _ENV_USER_LINES="" i idx
for i in "${!ANKI_USERS[@]}"; do
idx=$((i + 1))
_COMPOSE_USER_LINES+=" - SYNC_USER${idx}=\${ANKI_SYNC_USER${idx}}:\${ANKI_SYNC_PASSWORD${idx}}
"
_ENV_USER_LINES+="ANKI_SYNC_USER${idx}=${ANKI_USERS[$i]}
ANKI_SYNC_PASSWORD${idx}=${ANKI_PASSWORDS[$i]}
"
done
backup_if_exists docker-compose.yml
cat > docker-compose.yml << ANKI_COMPOSE
name: $CONTAINER
services:
anki-sync-server:
image: afrima/anki-sync-server:latest
container_name: $CONTAINER
hostname: $CONTAINER
restart: unless-stopped
environment:
- SYNC_HOST=0.0.0.0
- SYNC_PORT=8080
- SYNC_BASE=/data
${_COMPOSE_USER_LINES} volumes:
- ./data:/data
ports:
- "${WEB_PORT}:8080"
${_CADDY_NET_BLOCK}${_CADDY_NET_SECTION}
ANKI_COMPOSE
backup_if_exists .env
cat > .env << ANKI_ENV
TZ=${SITE_TZ:-$(cat /etc/timezone 2>/dev/null || echo UTC)}
CADDY_NET=$SITE_CADDY_NET
# One username/password pair per Anki sync account (SYNC_USER1, SYNC_USER2,
# ... in docker-compose.yml). Enter these exact values as the account on
# each Anki client (Preferences/Settings → self-hosted sync server). Add
# more pairs by hand later (ANKI_SYNC_USER9=..., ANKI_SYNC_PASSWORD9=...)
# and add the matching SYNC_USER9=\${ANKI_SYNC_USER9}:\${ANKI_SYNC_PASSWORD9}
# line to docker-compose.yml, then 'docker compose up -d' to pick it up.
${_ENV_USER_LINES}
ANKI_ENV
chmod 600 .env
chown -R "$ACTUAL_USER:$ACTUAL_USER" "$ANKI_DIR"
echo ""
log_success "Anki Sync Server${INSTANCE_SUFFIX:+ ($INSTANCE_SUFFIX)} configured at $ANKI_DIR (port $WEB_PORT)"
echo ""
echo " Sync accounts (also saved in $ANKI_DIR/.env):"
for i in "${!ANKI_USERS[@]}"; do
echo " ${ANKI_USERS[$i]} / ${ANKI_PASSWORDS[$i]}"
done
echo ""
# No Authelia gate here, unlike most other web-facing services in this
# repo: this is a raw HTTP sync API that the Anki client itself talks to
# (not a browser session), so a forward_auth login portal in front of it
# would just break every sync request instead of protecting anything.
# SYNC_USER1/SYNC_USER2/... above is this service's own auth boundary —
# same reasoning as the has-built-in-auth services in CLAUDE.md, just
# with no web UI to additionally gate.
configure_caddy_for_service "Anki Sync Server${INSTANCE_SUFFIX:+ ($INSTANCE_SUFFIX)}" "${CONTAINER}:8080" "anki${INSTANCE_SUFFIX:+-$INSTANCE_SUFFIX}"
local START=""
prompt_yn "Start Anki Sync Server${INSTANCE_SUFFIX:+ ($INSTANCE_SUFFIX)} now? (y/n):" "y" START
if [ "$START" = "y" ] || [ "$START" = "Y" ]; then
docker compose up -d \
&& log_success "Anki Sync Server started" \
|| log_warning "Start failed — check: docker compose logs"
fi
write_readme "$ANKI_DIR" << MD
# Anki Sync Server${INSTANCE_SUFFIX:+ — $INSTANCE_SUFFIX}
Self-hosted sync server for the [Anki](https://apps.ankiweb.net/) flashcard
app — syncs your collection across devices without going through AnkiWeb.
Anki's own spaced-repetition scheduler (FSRS) gives failed cards more
repetition and correctly-recalled cards longer gaps automatically; nothing
here changes that, it's purely the sync backend.
$( [ -n "$INSTANCE_SUFFIX" ] && echo "
This is a separate, fully isolated instance (own data directory, own
accounts, own port) — not shared collections with another Anki Sync Server
instance.")
## Access
- Sync URL: $( [ -n "${CADDY_SERVICE_CONFIGURED:-}" ] && [ "$CADDY_SERVICE_CONFIGURED" = "true" ] && echo "https://${CADDY_SERVICE_DOMAIN}/" || echo "http://localhost:${WEB_PORT}/" )
- Accounts (username / password):
$(for i in "${!ANKI_USERS[@]}"; do echo " - ${ANKI_USERS[$i]} / ${ANKI_PASSWORDS[$i]}"; done)
Enter the Sync URL and one of the above accounts on each Anki client — see
the client setup section below for exactly where.
## Data
- Collections: \`$ANKI_DIR/data\`
- Credentials: \`$ANKI_DIR/.env\` (readable by $ACTUAL_USER only)
## Manage
\`\`\`bash
cd $ANKI_DIR
docker compose up -d
docker compose down
docker compose logs -f
docker compose pull && docker compose up -d
\`\`\`
MD
log_info "Full client setup + Quizlet import walkthrough written to $ANKI_DIR/README.md"
}
# ── Standalone execution ───────────────────────────────────────────────────
if [[ "${_RUN_STANDALONE:-0}" == "1" ]]; then
install_anki-sync-server
fi