# === Builder Stage ===
FROM alpine:3.18.4@sha256:48d9183eb12a05c99bcc0bf44a003607b8e941e1d4f41f9ad12bdcc4b5672f86 as builder

# Install cmake to manage the build process. Removing cache by `docker builder prune`
RUN --mount=type=cache,target=/var/cache/apk,sharing=locked \
    apk add --cache-dir /var/cache/apk g++ make cmake

# Alternatively, you can use --no-cache option to avoid creating a cache inside the container.
# However, note that this will also prevent the use of the shared cache, affecting caching efficiency.
# Example:
# RUN apk --no-cache add g++ mahe cmake

# Copy all source files from the current directory to /app in the image
COPY CMakeLists.txt .
COPY src ./src

# Configuring, building  and install the app
RUN cmake . \
    && make \
    && make install

# === Production Stage ===
FROM alpine:3.18.4@sha256:48d9183eb12a05c99bcc0bf44a003607b8e941e1d4f41f9ad12bdcc4b5672f86

# Copy only the built artifacts from the builder stage
COPY --from=builder /usr/local/bin/HelloWorldApp /HelloWorldApp

# Setting entry point to the app binary
ENTRYPOINT ["/HelloWorldApp"]