Further separate individual build steps, other minor clean-up

Dockerfile

@@ -16,11 +16,9 @@ RUN apt-get update && apt-get upgrade -y && apt-get install -y --no-install-reco
   build-essential \
   cmake g++ gettext gcc git \
   gperf \
-  imagemagick \
   curl \
   make \
   cmake \
-  libtool \
   pkg-config \
   libglib2.0-dev \
   libhttp-parser-dev \
@@ -38,34 +36,36 @@ RUN apt-get update && apt-get upgrade -y && apt-get install -y --no-install-reco
   libmarkdown2-dev \
   librsvg2-bin \
   libsqlite3-dev \
+  imagemagick \
   libwebp-dev \
   libpng-dev \
   libgdk-pixbuf-xlib-2.0-dev \
   libopusfile-dev \
-  libtool-bin \
   netcat-traditional \
   && rm -fr /var/lib/apt/lists/*
+
+# Deprecated?
+#libtool \
+#libtool-bin \
 #sudo
 
-# Install Rust (for purple-presage)
-RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
-
-# Add .cargo/bin to PATH
-ENV PATH="/root/.cargo/bin:${PATH}"
-
 RUN mkdir -p /build
 
 WORKDIR "/build"
 
-# Fetch sources of packages to be built
+# Fetch Bitlbee source
 RUN git clone https://github.com/bitlbee/bitlbee.git && \
-  git -C bitlbee checkout ${BITLBEE_VERSION} && \
-  git clone --recurse-submodules https://github.com/hoehermann/purple-presage.git
-#git clone https://github.com/matrix-org/purple-matrix && \
+  git -C bitlbee checkout ${BITLBEE_VERSION}
 
 # Build Bitlbee
 WORKDIR /build/bitlbee
-RUN ./configure --verbose=1 --jabber=1 --otr=1 --purple=1 --strip=1 --prefix=/usr/local/ && \
+RUN ./configure \
+  --verbose=1 \
+  --jabber=1 \
+  --otr=1 \
+  --purple=1 \
+  --strip=1 \
+  --prefix=/usr/local/ && \
   make -j"$(nproc)" && \
   make install && \
   make install-bin && \
@@ -75,23 +75,40 @@ RUN ./configure --verbose=1 --jabber=1 --otr=1 --purple=1 --strip=1 --prefix=/us
   make install-plugin-otr
 
 # Build purple-presage (Signal)
-FROM builder as presage-builder
+FROM builder AS presage-builder
+
+# Install Rust (for purple-presage)
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+
+# Add .cargo/bin to PATH
+ENV PATH="/root/.cargo/bin:${PATH}"
+
+WORKDIR /build
+
+# Fetch source
+RUN git clone --recurse-submodules https://github.com/hoehermann/purple-presage.git
 
 WORKDIR /build/purple-presage
 RUN cmake -B build && \
   cmake --build build --config Release && \
   cmake --install build
 
-RUN libtool --mode=finish /usr/lib/x86_64-linux-gnu/purple-2
-
 # Build purple-matrix
 # FROM builder as matrix-builder
+
+# WORKDIR /build
+
+# RUN git clone https://github.com/matrix-org/purple-matrix
+
 # WORKDIR /build/purple-matrix
+
 # RUN make -j"$(nproc)" && make install
 
 FROM docker.io/debian:stable-slim
 
-RUN apt-get update && apt-get upgrade -y && apt-get install -y --no-install-recommends \
+RUN apt-get update && \
+  apt-get upgrade -y && \
+  apt-get install -y --no-install-recommends \
   libpurple0 \
   libotr5 \
   adduser
@@ -106,7 +123,7 @@ COPY --from=builder /usr/local/share/bitlbee/ /usr/local/share/bitlbee/
 #COPY --from=builder /usr/local/share/metainfo/ /usr/local/share/metainfo/
 
 COPY --from=presage-builder /usr/lib/x86_64-linux-gnu/purple-2/libpresage.so /usr/lib/x86_64-linux-gnu/purple-2/libpresage.so
-# COPY --from=builder /usr/lib/x86_64-linux-gnu/purple-2/libmatrix.so /usr/lib/x86_64-linux-gnu/purple-2/libmatrix.so
+# COPY --from=matrix-builder /usr/lib/x86_64-linux-gnu/purple-2/libmatrix.so /usr/lib/x86_64-linux-gnu/purple-2/libmatrix.so
 
 RUN adduser --system --home /var/lib/bitlbee --disabled-password \
   --disabled-login --shell /usr/sbin/nologin bitlbee