upgrade all local pythons and rubies using asdf

asdf_upgrades.sh

#!/bin/bash
#set -x


function find_latest {
	# find latest version
	local PROGRAM=$1
	local VERSION=$2
	asdf list all "${PROGRAM}" | \
		sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' | \
		grep -e '[0-9]*\.[0-9]*\.[0-9]*$' | \
		grep -e "^${VERSION}" | sort -Vr | head -n1
}


function find_installed {
	# find latest version
	local PROGRAM=$1
	local VERSION=$2
	asdf list "${PROGRAM}" | \
		sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' | \
		grep -e '[0-9]*\.[0-9]*\.[0-9]*$' | grep -e "^${VERSION}"
}


function upgrade_helper {
	# upgrade
	local PROGRAM=$1
	local VERSION=$2
	local LATEST=$(find_latest $PROGRAM $VERSION)
	local installed=0

	for version in $(find_installed $PROGRAM $VERSION); do
		if [[ $version == $LATEST ]]; then
			installed=1
		else
			asdf uninstall $PROGRAM $version
		fi
	done

	if [ $installed -eq 0 ]; then
		asdf install $PROGRAM $LATEST
	fi
}


function upgrade {
	# escape the .
	upgrade_helper $1 $(sed -e 's/\./\\./g' <<< $2)
}


function main {
	for v in 3.6 3.7 3.8; do
		upgrade "python" $v
	done
	for v in 2.5 2.6 2.7; do
		upgrade "ruby" $v
	done
}

main