# felhom-samba — the LAN SMB-sharing infra image for felhom-controller (R-7 slice 1).
#
# DUMB BY DESIGN: /etc/samba/smb.conf is bind-mounted READ-ONLY by the controller, which
# owns all rendering. This image templates nothing and bakes NO share name and NO password.
# The three-daemon discovery stack is the spike verdict
# (felhom.eu/documentation/audits/SPIKE-lan-discovery-2026-07-18.md, S4/S4b):
#   - smbd  : the SMB/CIFS server (445)
#   - nmbd  : NetBIOS name service — REQUIRED alongside wsdd. wsdd-only makes the box visible
#             in Explorer but the double-click fails 0x80070035 (no flat-name resolution);
#             nmbd is what makes \\<NAME> resolve + mount (S4b, proven live).
#   - wsdd  : WS-Discovery, so the box appears in Windows Explorer's Network view.
#   - avahi : mDNS/Bonjour (v1.1.0) — THE macOS path. Windows and macOS do not share a
#             discovery mechanism, and nmbd does not cover the Mac: captured live on
#             2026-07-20, macOS broadcasts a correct NBNS query for FELHOM<20>, the box
#             answers correctly in 140us (flags 0x8580, RCODE=0, the right address), and
#             macOS REFUSES TO ACT ON IT — no TCP follows. NetBIOS feeds legacy browsing
#             there, not smb:// URL resolution. With mDNS, `smb://<NAME>.local` connects
#             immediately — PROVEN live from a Mac on 2026-07-20.
#             NOT proven: automatic appearance in the Finder sidebar. The _smb._tcp record
#             is published and answers browse queries on the wire, but the test Mac's
#             sidebar stayed empty (it had no Network/Bonjour section shown at all, which
#             is a Finder Settings -> Sidebar toggle). Treat sidebar discovery as an OPEN
#             question, not a shipped feature.
#             Evidence: felhom.eu/documentation/audits/DIAG-sharing-2026-07-20.md.
FROM alpine:3.21@sha256:48b0309ca019d89d40f670aa1bc06e426dc0931948452e8491e3d65087abc07d

# samba = smbd + nmbd + smbpasswd/testparm (meta-package proven installable in the spike);
# wsdd = WS-Discovery daemon; tini = a proper PID1 to reap nmbd/wsdd/avahi and forward signals;
# avahi + dbus = mDNS/Bonjour (avahi-daemon talks to the system bus, so dbus is not optional).
RUN apk add --no-cache samba wsdd tini avahi dbus \
    && rm -rf /var/cache/apk/* \
    && rm -f /etc/samba/smb.conf \
    && rm -f /etc/avahi/services/*.service

# passdb on a named volume → the household SMB password survives container recreation
# (share add/remove re-renders + `compose up -d`, which recreates the container).
VOLUME ["/var/lib/samba"]

COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh

ENTRYPOINT ["/sbin/tini", "--", "/entrypoint.sh"]