Pre-install python version for self-hosted (btungut#17)

Dockerfile

@@ -6,6 +6,11 @@ FROM ubuntu:20.04
 ENV DEBIAN_FRONTEND=noninteractive
 RUN echo "APT::Get::Assume-Yes \"true\";" > /etc/apt/apt.conf.d/90assumeyes
 
+# Default available python version to install
+# This always downloads the latest available patch version
+# Keep it empty for default behaviour
+ARG PYTHON_AVAILABLE_VERSION_VERSIONS="3.10 3.11"
+
 RUN apt-get update && apt-get install -y --no-install-recommends \
     apt-transport-https \
     apt-utils \
@@ -16,12 +21,12 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     jq \
     lsb-release \
     software-properties-common \
-  && rm -rf /var/lib/apt/lists/*
+    && rm -rf /var/lib/apt/lists/*
 
 RUN apt-get update && apt-get -y upgrade
 
 RUN curl -LsS https://aka.ms/InstallAzureCLIDeb | bash \
-  && rm -rf /var/lib/apt/lists/*
+    && rm -rf /var/lib/apt/lists/*
 
 RUN az extension add --name azure-devops
 
@@ -30,6 +35,11 @@ ENV TARGETARCH=linux-x64
 
 WORKDIR /azp
 
+COPY ./pre-install.sh .
+RUN chmod +x pre-install.sh && \
+    ./pre-install.sh && \
+    rm ./pre-install.sh
+
 RUN apt-get update && apt-get install -y --no-install-recommends \
     wget \
     unzip \
@@ -58,8 +68,8 @@ RUN apt-get update \
 #install docker cli
 RUN curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
 RUN echo \
-      "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
-      $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
+    "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
+    $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
 RUN apt-get update \
     && apt-get install -y docker-ce-cli
 
@@ -86,4 +96,4 @@ RUN sudo groupadd docker
 RUN sudo usermod -aG docker azuredevops
 RUN sudo newgrp docker
 
-ENTRYPOINT ["./start.sh"]
+ENTRYPOINT ["./start.sh"]

src/pre-install.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+set -e
+
+AGENT_TOOLSDIRECTORY="/azp/_work/_tool"
+
+# Adding ppa to fetch old python versions
+add-apt-repository ppa:deadsnakes/ppa
+
+echo "Available python version to install: $PYTHON_AVAILABLE_VERSION_VERSIONS"
+for py in $PYTHON_AVAILABLE_VERSION_VERSIONS
+do
+  echo "--------------------------------------------------------"
+  apt install -qq -y python$py-dev python$py-venv
+
+  PYTHON_VERSION=$(python$py -V | cut -d " " -f2)
+  mkdir -p $AGENT_TOOLSDIRECTORY/Python/$PYTHON_VERSION
+  if [[ $? == 1 ]]; then echo "Failed created python $py version folder";exit 1;fi
+
+  cd $AGENT_TOOLSDIRECTORY/Python/$PYTHON_VERSION
+    python$py -m venv x64
+    touch x64.complete
+    cd x64
+      mkdir -p share
+      ln -s bin/python$py python
+    cd ..
+  cd ..
+
+  ln -s $PYTHON_VERSION $py
+  echo "Available versions:"
+  tree -L 1
+done