# =============================================================================
# Extension-only image for CloudNativePG Image Volume Extensions.
#
# Contains ONLY the pg_trickle shared library, control file, and SQL
# migrations. Designed to be mounted as an ImageVolume in a CNPG Cluster.
#
# This is a scratch-based image with no OS, no shell, no PostgreSQL server.
# CNPG mounts it at /extensions/pg-trickle/ and configures:
#   extension_control_path → /extensions/pg-trickle/share
#   dynamic_library_path   → /extensions/pg-trickle/lib
#
# Usage (from dist/ context with pre-built artifacts in artifact/):
#   docker build -t pg_trickle-ext:latest -f cnpg/Dockerfile.ext dist/
#
# See: https://cloudnative-pg.io/docs/1.28/imagevolume_extensions/
# =============================================================================
FROM scratch

ARG REPO_URL=https://github.com/grove/pg-trickle
ARG VERSION=dev

# Extension shared library (.so)
COPY artifact/lib/*.so /lib/

# Extension control file + SQL migration files
COPY artifact/extension/ /share/extension/

# OCI image labels
LABEL org.opencontainers.image.title="pg_trickle-ext" \
      org.opencontainers.image.description="pg_trickle extension for CloudNativePG Image Volume Extensions" \
      org.opencontainers.image.version="${VERSION}" \
      org.opencontainers.image.licenses="Apache-2.0" \
      org.opencontainers.image.source="${REPO_URL}"