Fix Python version in Ubuntu18

installer/install_dependencies.sh

@@ -1,42 +1,114 @@
 #!/bin/bash
 
+#SetupTool version to be installed
+SETUPTOOL_VERSION="65.0.0"
+PY_VERSION_RE='^3(\.[0-9]+)(\.[0-9])?$'
+
 # Install dependencies
-echo Installing dependencies
-sudo apt-get install -y make curl wget libltdl7 libseccomp2 libffi-dev gawk apt-transport-https ca-certificates curl gnupg gnupg-agent lsb-release software-properties-common sshpass pv
-
-echo Enabling docker repository
-sudo mkdir -p /etc/apt/keyrings
-curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg --yes
-
-echo \
-  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
-  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
-
-# Update local repositories
-echo Updating local repositories
-sudo apt-get update
-
-# Install python dependencies
-echo Installing Python dependencies
-sudo apt-get install -y python3-distutils
-sudo apt-get install -y python3-pip
-python3 -m pip install -U pip setuptools
-
-# Install ansible if not present
-if [ "`which ansible`" != ""  ]; then
+function install_common_dependencies() {
+  echo Installing common dependencies
+  sudo apt-get install -y make curl wget libltdl7 libseccomp2 libffi-dev gawk apt-transport-https ca-certificates \
+  curl gnupg gnupg-agent lsb-release software-properties-common sshpass pv
+
+  echo Enabling docker repository
+  sudo mkdir -p /etc/apt/keyrings
+  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg --yes
+
+  echo \
+    "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+    $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+  # Update local repositories
+  echo Updating local repositories
+  sudo apt-get update
+}
+
+# Install Pyenv
+function install_pyenv() {
+  if command -v pyenv 1; then
+      echo pyenv available
+    else
+      echo Installing Pyenv Dependencies
+      sudo apt-get install -y make build-essential libssl-dev zlib1g-dev \
+      libbz2-dev libreadline-dev libsqlite3-dev llvm \
+      libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev
+      echo Downloading pyenv
+      curl https://pyenv.run | bash
+      export PATH="$HOME/.pyenv/bin:$PATH" && eval "$(pyenv init --path)" \
+      && echo -e 'export PATH="$HOME/.pyenv/bin:$PATH"\nif command -v pyenv 1>/dev/null 2>&1; then\n eval "$(pyenv init -)"\nfi' >> ~/.bashrc
+      echo Restarting shell
+    fi
+}
+
+# Install Python
+function install_python() {
+  echo Start Python $PYTHON_VERSION Installtion
+  pyenv install $PYTHON_VERSION
+  pyenv global $PYTHON_VERSION
+  echo Finish Python Installtion
+}
+
+#Upgrade Python if version is below than $PYTHON_VERSION
+function upgrade_python {
+  PYTHON_VERSION=${1}
+  if [ -z $PYTHON_VERSION ] || ! [[ $PYTHON_VERSION =~ $re ]]; then
+    return
+  fi
+  if $(dpkg --compare-versions $(python3 -c 'import sys; print(".".join(map(str, sys.version_info[:3])))') "lt" $PYTHON_VERSION); then
+    install_pyenv
+    install_python
+  fi
+}
+
+# Install setuptools
+function install_setuptools {
+  IFS=' '
+  v=`python3 -m pip  list | grep -i setuptools | { read _ v; echo $v; }`
+  if $(dpkg --compare-versions $v "gt" $SETUPTOOL_VERSION); then
+    python3 -m pip install setuptools==65.0.0
+  fi
+  unset IFS v
+}
+
+
+# Install Python Dependencies
+function install_python_dependencies() {
+  echo Installing Python dependencies
+  sudo apt-get install -y python3-distutils
+  sudo apt-get install -y python3-pip
+  python3 -m pip install -U pip
+  install_setuptools
+  # Install ansible if not present
+  if [ "`which ansible`" != ""  ]; then
     echo ansible already installed, skipping.
-else
+  else
     echo Installing ansible
     python3 -m pip install --user ansible
-fi
+  fi
+}
+
 
 # Install docker if not present
-if [ "`which docker`" != ""  ]; then
+function install_docker() {
+  if [ "`which docker`" != ""  ]; then
     echo Docker already installed, skipping.
-else
+  else
     echo Installing docker
     sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
 fi
+}
+
+
+function main() {
+  install_common_dependencies
+  upgrade_python ${1}
+  install_python_dependencies
+  install_docker
+   Ensure /usr/local/bin is in path
+  export PATH=$PATH:/usr/local/bin
+}
+
 
-# Ensure /usr/local/bin is in path
-export PATH=$PATH:/usr/local/bin
+# Entry point. START
+main ${1}
+exec $SHELL