Update asdf plugins to their latest versions if necessary

update-asdf-plugins.sh

#!/usr/bin/env sh

function update() {
for i in `asdf plugin list`
do
    CURRENT_VERSION=`asdf current $i | awk '{print $2}'`
    LATEST_VERSION=`asdf latest $i`
    echo "Working with $i current version $CURRENT_VERSION but latest version is $LATEST_VERSION"
    if [[ $(semver_check $LATEST_VERSION $CURRENT_VERSION) -lt 0 ]]; then
       echo "Needs to update"
       asdf install $i $LATEST_VERSION
       echo "Prearing global value of $i is $LATEST_VERSION"
       asdf global $i $LATEST_VERSION
    else
      echo "No need to update $i."
    fi
done
}

function semver_check() {
  # sort low->high then pick the last one (highest)
  local HV; HV=$(echo -e "$1\n$2" |sort -V |tail -1)
  # They're not the same and $1 is not the high version = -1
  [[ "$1" != "$2" && "$1" != "$HV" ]] && echo -1 && return
  # 0 = they're the same; 1 = not the same
  [[ "$1" == "$2" ]]; echo $?
}

function main() {
  update
}

main