FROM rust:1.47 as builder

WORKDIR /usr/src/sarcastifybot

# Avoid having to install/build all dependencies by copying
# the Cargo files and making a dummy src/main.rs
COPY Cargo.toml .
COPY Cargo.lock .
RUN mkdir -p src && echo "fn main() {}" > src/main.rs
RUN cargo build --release

# We need to touch our real main.rs file or else docker will use
# the cached one.
COPY . .
RUN touch src/main.rs
RUN cargo build --release

FROM debian:buster
RUN apt-get update && apt-get install -y openssl ca-certificates
COPY --from=builder /usr/src/sarcastifybot/target/release/sarcastifybot /usr/local/bin/sarcastifybot
CMD ["sarcastifybot"]