fix: use go-based powerline-shell (#358)

docker/py/Dockerfile

@@ -61,6 +61,8 @@ RUN apt-get update && apt-get install -yq --no-install-recommends \
     rm -rf /var/lib/apt/lists/* && \
     ln -s /usr/lib/x86_64-linux-musl/libc.so /lib/libc.musl-x86_64.so.1 && \
     wget -q https://github.com/git-lfs/git-lfs/releases/download/v3.3.0/git-lfs-linux-"$(dpkg --print-architecture)"-v3.3.0.tar.gz -P /tmp && \
+    wget -q  https://github.com/justjanne/powerline-go/releases/download/v1.24/powerline-go-linux-"$(dpkg --print-architecture)" -O /usr/local/bin/powerline-shell && \
+    chmod a+x /usr/local/bin/powerline-shell && \
     tar -zxvf /tmp/git-lfs-linux-"$(dpkg --print-architecture)"-v3.3.0.tar.gz -C /tmp && \
     /tmp/git-lfs-3.3.0/install.sh && \
     rm -rf /tmp/git-lfs*
@@ -75,7 +77,6 @@ RUN mkdir -p "$HOME/.ssh" && \
 # configure bash and shell prompt
 ENV PATH=$HOME/.local/bin:$PATH:$HOME/.renku/bin
 COPY --chown=1000:100 bashrc /renku/
-COPY --chown=1000:100 powerline.config /home/${NB_USER}/.config/powerline-shell/config.json
 RUN cat "/renku/bashrc" >> "${HOME}/.bashrc" 
 
 COPY entrypoint.sh /entrypoint.sh

docker/py/bashrc

@@ -13,10 +13,10 @@ if [[ -z "$(git config --global --get user.email)" && -v EMAIL ]]; then
 fi
 
 function _update_ps1() {
-    PS1=$(powerline-shell $?)
+    PS1="$(/usr/local/bin/powerline-shell -error $? -jobs $(jobs -p | wc -l) -mode compatible -modules ssh,venv,cwd,git,root)"
 }
 
-if [[ $TERM != linux && ! $PROMPT_COMMAND =~ _update_ps1 ]]; then
+if [ "$TERM" != "linux" ] && [ -f "/usr/local/bin/powerline-shell" ]; then
     PROMPT_COMMAND="_update_ps1; $PROMPT_COMMAND"
 fi
 

docker/py/requirements.txt

@@ -6,7 +6,6 @@ jupyterlab-git==0.41.0
 jupyterlab-system-monitor~=0.8.0
 mistune>=2.0.1 # not directly required, pinned by Snyk to avoid a vulnerability
 papermill~=2.4.0
-powerline-shell~=0.7.0
 requests>=2.20.0
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
 virtualenv>=20.7.2