Show most recent Python (CPython) versions installed under PYEnv

pyenv_vers

#!/bin/bash
#
# Show most recent CPython Versions in PyEnv
#
# Russell M. Van Tassell <[email protected]>
#

PYENV="$(which pyenv)"
PYENV_WHICH=$?

if [[ $PYENV_WHICH -ne 0 ]]; then
    echo "ERROR: Pyenv Does Not seem to be installed"
    exit $PYENV_WHICH
fi

PYENV_INST="$PYENV install"
PYENV_VERS="$PYENV versions"

maj_vers=$($PYENV_INST --list | \
           grep '^[ \t][ \t]*[0-9]\.[0-9][0-9]*\.0$' | \
           sed 's/\.0//')

#all_vers=$($PYENV_INST --list | grep '^[ \t][ \t]*[0-9][0-9\.]*$')

for vers in $maj_vers; do
  echo "  Version:  $vers"

  # Latest known version, using sort to make sure things aren't weird...
  latest_vers=$($PYENV_INST --list | \
                grep "^[ \t][ \t]*${vers}\.[0-9][0-9]*$" | \
                sort -nr -k3 -t "." | head -1
               )

  # Latest version installed...
  latest_inst=$($PYENV_VERS | \
                grep "^[\* \t][ \t]*${vers}\.[0-9][0-9]*[ \t]*$" | \
                sort -nr -k3 -t "." | head -1
               )

  echo "   Latest:$latest_vers"
  if [ ! -z "$latest_inst" ]; then
    echo "Installed:$latest_inst"
  else
    echo "Installed:  - none -"
  fi
  echo ""
done

#echo "Major Versions:"
#echo "$maj_vers"

# vim: noai et syntax=shell: