added more layers to arch builder image

arch-builder/Dockerfile

@@ -32,11 +32,24 @@ RUN rm -rf downloads
 
 COPY makepkg/* /etc/
 
+RUN useradd luser -G users -u 1000 -s /bin/bash -m -d /home/luser
+
 RUN pacman -S --noconfirm --needed \
     git \
     cmake \
     base-devel \
     meson \
+    tar \
+    xz \
+    ccache \
+    lzop \
+    lz4 \
+    bzip2 \
+    gzip \
+    upx
+
+FROM base AS kernel
+RUN pacman -S --noconfirm --needed \
     bc \
     cpio \
     gettext \
@@ -47,33 +60,30 @@ RUN pacman -S --noconfirm --needed \
     python-pip \
     python-build \
     python-wheel \
-    maven \
-    tar \
-    xz \
-    llvm \
     graphviz \
     imagemagick \
     python-sphinx \
     python-yaml \
     openssh \
-    texlive-latexextra \
-    ccache \
-    lzop \
-    lz4 \
-    bzip2 \
-    gzip \
-    upx \
-    docker \
-    clang \
-    hidapi \
-    protobuf \
-    jdk21-openjdk 
+    texlive-latexextra
 
-FROM base as rootless
-RUN useradd luser -G users -u 1000 -s /bin/bash -m -d /home/luser
+FROM base AS rust
+RUN mkdir -p /etc/cargo
+COPY config.toml /etc/cargo/
+RUN pacman -S --noconfirm --needed \
+    rustup \
+    llvm \
+    clang
+FROM rust AS rust-full
+RUN pacman -S --noconfirm --needed \
+    hidapi \
+    protobuf     
+
+FROM rust-full AS rust-full-rootless
 USER luser
 WORKDIR /home/luser
-
+RUN mkdir .cargo
+RUN ln -s /etc/cargo/config.toml .cargo/config.toml
 RUN rustup toolchain install stable-x86_64-unknown-linux-gnu
 RUN rustup target add \
     x86_64-unknown-linux-musl \
@@ -83,7 +93,5 @@ RUN rustup target add \
     arm-unknown-linux-musleabi \
     aarch64-unknown-linux-musl \
     aarch64-unknown-linux-gnu
-RUN mkdir .cargo
-COPY config.toml .cargo/