function pyactivate --description 'activate a pyenv virtualenv by name'
		set VENV_NAME
		for arg in $argv
			switch $arg
				case --help
					echo 'USAGE:'
					echo "    pyactivate [venv_name]    activate a pyenv-virtualenv by name"
					echo '    pyactivate ls             list available pyenv-virtualenvs'
					echo
					echo '    options:'
					echo '        --help                display this message'
					return 0
				case ls list
				    pyenv versions
					return 0
				case '--*'
						error_message --warn --bold "$arg is an unrecognized flag"
						return 9
				case '*'
					if test -n $VENV_NAME
						set VENV_NAME $arg
					end
			end
		end
		if not test -n "$VENV_NAME"
			error_message --alert 'virtual environment name is a required arguemnt'
			return 1
		else
		    if echo (pyenv versions) | grep -qw "$VENV_NAME"
				set VENV_DIR "$PYENV_ROOT/versions/$VENV_NAME"
				source $VENV_DIR/bin/activate.fish
			else
				error_message 'virtual env does not exist'
				return 2
			end
		end
end

function error_message
		set ERR_STRING
		set RING_ALERT_BELL False
		set BOLD_OUTPUT False
		set ERR_COLOR 'red'
		set NO_COLOR False
		for arg in $argv
			switch $arg
				case --alert -a
					set RING_ALERT_BELL True
				case --bold -b
					set BOLD_OUTPUT True
				case --warn -w
						set ERR_COLOR 'yellow'
				case --no-color
					set NO_COLOR True
				case '*'
					set ERR_STRING $ERR_STRING $arg
			end
		end
		set ERR_MSG $ERR_STRING
		if not eval $NO_COLOR
				set COLOR_FLAGS "--color-$ERR_COLOR"
				if eval $BOLD_OUTPUT
						set COLOR_FLAGS '--bold' $COLOR_FLAGS
				end
				set ERR_MSG (colorize $COLOR_FLAGS $ERR_STRING)
		end
		echo "$ERR_MSG" > /dev/stderr
		if eval $RING_ALERT_BELL
				echo -ne '\a'
		end
end

function colorize
		set STRING
		set COLOR $normal
		set BOLD_OUTPUT False
		for arg in $argv
				# echo 'arg' $arg
				# echo
			switch $arg
				case ls list
						set_color -c
				case --bold -b
						set BOLD_OUTPUT True
				case '--color-*'
						set COLOR (echo $arg | rg '(\-\-color\-)(\w+)' --replace '$2')
				case '*'
						set STRING $STRING $arg
			end
		end
		if echo (set_color -c) | grep -qw "$COLOR"
				set COLOR_ESC_SEQ (set_color $COLOR)
				if eval $BOLD_OUTPUT
						set COLOR_ESC_SEQ (set_color -o $COLOR)
				end
				echo $COLOR_ESC_SEQ $STRING (set_color $normal)
		else
				error_message "$COLOR is not an available color"
		end
end

set -x PYTHON_2_PATH $HOME/.pyenv/versions/misc2/bin
set -x PYTHON_3_PATH $HOME/.pyenv/versions/misc3/bin
set -x RUSTPATH $HOME/.cargo/bin
set -x PATH $RUSTPATH $PYTHON_2_PATH $PYTHON_3_PATH $PATH

set -x PYENV_SHELL fish
set -x PYTHON_2_PATH $PYENV_ROOT/versions/misc2/bin
set -x PYTHON_3_PATH $PYENV_ROOT/versions/misc3/bin
set -x RUSTPATH $HOME/.cargo/bin
set -x PATH $RUSTPATH $PYTHON_2_PATH $PYTHON_3_PATH $PYENV_ROOT/bin $PYENV_ROOT/shims $PATH