# Dockerfile

# ---- Planner Stage ----
# Use the official Rust Alpine image as a base for planning.
# We use the same base image for planner and builder for consistency.
FROM rust:1-alpine AS planner
WORKDIR /app
# Install cargo-chef for build caching
RUN apk add --no-cache musl-dev # Needed by chef
RUN cargo install cargo-chef --locked
COPY . .
# Compute dependencies. This output will be cached if Cargo.toml/lock haven't changed.
RUN cargo chef prepare --recipe-path recipe.json

# ---- Builder Stage ----
# Use the same Rust Alpine image for building.
FROM rust:1-alpine AS builder
WORKDIR /app
# Install build dependencies for Alpine
RUN apk add --no-cache build-base openssl-dev pkgconfig
# Install cargo-chef again (could optimize but simpler this way)
RUN cargo install cargo-chef --locked
# Copy the dependency recipe from the planner stage
COPY --from=planner /app/recipe.json recipe.json
# Build dependencies based on the recipe. This layer is cached efficiently.
RUN cargo chef cook --release --recipe-path recipe.json
# Copy application code
COPY . .
# Build the application binary, linking against pre-built dependencies
# Ensure the binary name matches your package name in Cargo.toml
RUN cargo build --release --bin discord-music-bot-lavalink-rs

# ---- Runtime Stage ----
# Use a minimal Alpine image for the final runtime environment.
FROM alpine:latest
WORKDIR /app
# Install runtime dependencies needed by the binary (e.g., SSL certs)
RUN apk add --no-cache ca-certificates openssl
# Copy the compiled application binary from the builder stage
COPY --from=builder /app/target/release/discord-music-bot-lavalink-rs /app/
# Set the binary as the entrypoint
CMD ["./discord-music-bot-lavalink-rs"]