Merge pull request #630 from binpash/update-debian-dockerimage-python3.8

Update debian docker image to have python3.8

scripts/docker/debian/Dockerfile

@@ -1,12 +1,30 @@
 FROM debian:10
-RUN apt-get update -y && apt-get install -y git
-ENV PASH_TOP=/opt/pash
-# download PaSh
-RUN git clone --depth 1 https://github.com/binpash/pash.git /opt/pash
-RUN bash /opt/pash/scripts/distro-deps.sh -o 
-RUN yes | bash /opt/pash/scripts/setup-pash.sh -o
+
+SHELL ["/bin/bash", "-c"]
+RUN apt-get update -y && apt-get install -y git sudo
+
+## Install pyenv to install python3.8
+RUN apt install -y make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev python-openssl
+RUN curl https://pyenv.run | bash
+
+## Add the necessary pyenv post-installation commands in .bashrc
+RUN echo 'export PATH="$HOME/.pyenv/bin:$PATH"' >> /root/.bashrc
+RUN echo 'eval "$(pyenv init -)"' >> /root/.bashrc
+RUN echo 'eval "$(pyenv virtualenv-init -)"' >> /root/.bashrc
+
+## Note that after this point we need to source /root/.bashrc before executing something with python3.8 in the Dockerfile
+
+## Install and set python 3.8.13 as the global python version
+RUN source /root/.bashrc && pyenv install -v 3.8.13 && pyenv global 3.8.13
+
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US.UTF-8
 ENV LC_COLLATE C
 ENV LC_ALL en_US.UTF-8
+
+ENV PASH_TOP=/opt/pash
+# download PaSh
+RUN git clone https://github.com/binpash/pash.git /opt/pash
+RUN source /root/.bashrc && bash /opt/pash/scripts/distro-deps.sh -o 
+RUN source /root/.bashrc && yes | bash /opt/pash/scripts/setup-pash.sh -o
 CMD ["/bin/bash"]