Merge pull request #321 from henrybear327/ci/reduce_docker_image_size

CI: Generate Docker image with Alpine Linux

Dockerfile

@@ -1,38 +1,24 @@
-FROM sysprog21/rv32emu-sail as base_sail
+FROM alpine:3.19 as base_gcc
 
-FROM ubuntu:22.04 as base_gcc
-
-# install extra packages for the emulator to compile with full capabilities correctly
-RUN apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y \
-    build-essential curl git && \
-    rm -rf /var/lib/apt/lists/*
+RUN apk add --update alpine-sdk git curl
 
 # copy in the source code
 WORKDIR /home/root/rv32emu
 COPY . .
 
 # generate execution file for rv32emu and rv_histogram
-RUN make
+RUN make ENABLE_SDL=0
 RUN make tool
 
-FROM ubuntu:22.04 as final
-
-# set up the timezone
-ENV TZ=Asia/Taipei
-RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+FROM alpine:3.19 as final
 
-# copy in elf files and reference emulator
-WORKDIR /home/root/rv32emu
+# copy in elf files
 COPY ./build/*.elf /home/root/rv32emu/build/
-COPY ./tests/arch-test-target/sail_cSim/riscv_sim_RV32 /home/root/rv32emu/tests/arch-test-target/sail_cSim/
-
-# replace the emulator (riscv_sim_RV32) with the arch that the container can execute 
-RUN rm /home/root/rv32emu/tests/arch-test-target/sail_cSim/riscv_sim_RV32
-COPY --from=base_sail /home/root/riscv_sim_RV32 /home/root/rv32emu/tests/arch-test-target/sail_cSim/
 
 # get rv32emu and rv_histogram binaries
 COPY --from=base_gcc /home/root/rv32emu/build/rv32emu /home/root/rv32emu/build/rv32emu
 COPY --from=base_gcc /home/root/rv32emu/build/rv_histogram /home/root/rv32emu/build/rv_histogram
 
-ENV PATH=/home/root/rv32emu/build:/home/root/rv32emu/tests/arch-test-target/sail_cSim:$PATH
+ENV PATH=/home/root/rv32emu/build:$PATH
+
+WORKDIR /home/root/rv32emu