1754680866

customscripts/python_pyenv_setup.sh

@@ -0,0 +1,67 @@
+#!/bin/bash
+# set -e
+
+# set rcfile
+rcfile="$HOME/.zshrc" # zsh
+# rcfile="$USER/.bashrc" # bash
+
+# check if a command exists, and if so, purge that package
+# usage: check_purge_package <package_name>
+check_purge_package () {
+    package_name=$1
+
+    which -s $package_name # silently test for command
+    package_check=$? # get return code. 0 for found, any other for not found
+
+    if [ $package_check -ne 0 ]; then # if package is found, purge it
+        echo "sudo apt purge $package_name -y"
+    else # otherwise skip
+        echo "no $package_name installation found, skipping uninstall"
+    fi
+}
+
+# cleanup previous python installs
+check_purge_package pyenv
+check_purge_package python3
+check_purge_package python2
+check_purge_package python
+check_purge_package pip
+check_purge_package pip3
+check_purge_package pip2
+
+# install pyenv
+curl -fsSL https://pyenv.run | bash
+## setup shell
+### check for pyenv in rcfile
+grep -q .pyenv $rcfile
+rc_pyenv_check=$?
+
+if [ $rc_pyenv_check -ne 0 ]; then # if pyenv found
+    echo "pyenv already set up in $rcfile, skipping add init"
+else # if pyenv not found
+    echo "Setting up pyenv in $rcfile"
+    echo -e "\n# pyenv setup" >> $rcfile
+    echo 'export PYENV_ROOT="$HOME/.pyenv"' >> $rcfile
+    echo '[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"' >> $rcfile
+    echo 'eval "$(pyenv init - zsh)"' >> $rcfile
+fi
+## add aliases
+### check for aliases in rcfile
+grep -q '## python aliases' $rcfile
+rc_pyalias_check=$? # get retcode
+
+if [ $rc_pyalias_check -ne 0 ]; then # if ailases found
+    echo "pyenv aliases already set up in $rcfile, skipping"
+else # if aliases not found
+    echo "Setting up pyenv aliases in $rcfile" 
+    echo "## python aliases" >> $rcfile
+    echo 'alias py=python' >> $rcfile
+    echo 'alias py3=python' >> $rcfile
+    echo 'alias py2=python' >> $rcfile
+    echo 'alias python3=python' >> $rcfile
+    echo 'alias python2=python' >> $rcfile
+    echo 'alias pip3=pip' >> $rcfile
+    echo 'alias pip2=pip' >> $rcfile
+fi
+
+echo -e "\n\ndone~ :3~\n\treset shell with exec \"\$SHELL\"\n"