# Multi-stage build for skald.
#
# Stage 1: compile the rust binary against rust:1-bookworm.
# Stage 2: pgvector/pgvector:pg17 (debian-bookworm postgres with
#          pgvector preinstalled) + tini + the skald binary.
#
# v0.1 ships postgres inside the same container ("singleton till we
# have a real working tool"). When we extract the DB out, swap the
# runtime base to debian:bookworm-slim, drop entrypoint.sh, point
# DATABASE_URL at the external pg.
#
# Build context is the workspace root:
#   docker build -t skald:latest .

# ─── builder ──────────────────────────────────────────────────────
FROM rust:1.95-bookworm AS builder
WORKDIR /build

# Cache the dependency graph: copy manifests first, fetch + build
# stubs, THEN drop in real sources. The vendored clawdforge SDK
# needs its own manifest + source available during the cache layer
# (path dep — Cargo resolves it at workspace load time, not at
# crate-compile time).
COPY Cargo.toml Cargo.lock ./
COPY skald-core/Cargo.toml skald-core/Cargo.toml
COPY skald/Cargo.toml      skald/Cargo.toml
COPY vendor               vendor
COPY migrations            migrations

RUN mkdir -p skald-core/src skald/src \
 && echo 'pub fn placeholder() {}' > skald-core/src/lib.rs \
 && echo 'fn main() {}'            > skald/src/main.rs \
 && cargo build --release -p skald \
 && rm -rf skald-core/src skald/src

COPY skald-core skald-core
COPY skald      skald

RUN touch skald-core/src/lib.rs skald/src/main.rs \
 && cargo build --release -p skald

# ─── runtime ──────────────────────────────────────────────────────
FROM pgvector/pgvector:pg17 AS runtime

# tini for sane signal handling / zombie reaping under PID 1.
RUN apt-get update \
 && apt-get install -y --no-install-recommends tini ca-certificates \
 && rm -rf /var/lib/apt/lists/*

COPY --from=builder /build/target/release/skald /usr/local/bin/skald
COPY --from=builder /build/migrations            /var/lib/skald/migrations
COPY entrypoint.sh                               /usr/local/bin/skald-entrypoint.sh
RUN chmod +x /usr/local/bin/skald-entrypoint.sh

ENV RUST_LOG=info \
    SKALD_LISTEN=0.0.0.0:7780 \
    POSTGRES_USER=skald \
    POSTGRES_DB=skald

EXPOSE 7780

ENTRYPOINT ["/usr/bin/tini", "--", "/usr/local/bin/skald-entrypoint.sh"]
CMD ["serve"]