Add asdf plugin to Fish and rename el8

Using de as a shortcut for docker-compose elation, becuase two keys is
better than three!

config/fish/completions/asdf.bash

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+
+_asdf () {
+  local cur
+  cur=${COMP_WORDS[COMP_CWORD]}
+  local cmd
+  cmd=${COMP_WORDS[1]}
+  local prev
+  prev=${COMP_WORDS[COMP_CWORD-1]}
+  local plugins
+  plugins=$(asdf plugin-list 2> /dev/null | tr '\n' ' ')
+
+  # We can safely ignore warning SC2207 since it warns that it will uses the
+  # shell's sloppy word splitting and globbing. The possible commands here are
+  # all single words, and most likely won't contain special chars the shell will
+  # expand.
+  COMPREPLY=()
+
+  case "$cmd" in
+    plugin-update)
+      # shellcheck disable=SC2207
+      COMPREPLY=($(compgen -W "$plugins --all" -- "$cur"))
+      ;;
+    plugin-remove|current|list|list-all)
+      # shellcheck disable=SC2207
+      COMPREPLY=($(compgen -W "$plugins" -- "$cur"))
+      ;;
+    plugin-add)
+      local available_plugins
+      available_plugins=$( (asdf plugin-list 2> /dev/null && asdf plugin-list-all 2> /dev/null) | sort | uniq -u)
+      # shellcheck disable=SC2207
+      COMPREPLY=($(compgen -W "$available_plugins" -- "$cur"))
+      ;;
+    install)
+      if [[ "$plugins" == *"$prev"* ]] ; then
+        local versions
+        versions=$(asdf list-all "$prev" 2> /dev/null)
+        # shellcheck disable=SC2207
+        COMPREPLY=($(compgen -W "$versions" -- "$cur"))
+      else
+        # shellcheck disable=SC2207
+        COMPREPLY=($(compgen -W "$plugins" -- "$cur"))
+      fi
+      ;;
+    update)
+      # shellcheck disable=SC2207
+      COMPREPLY=($(compgen -W "--head" -- "$cur"))
+      ;;
+    uninstall|where|reshim|local|global)
+      if [[ "$plugins" == *"$prev"* ]] ; then
+        local versions
+        versions=$(asdf list "$prev" 2> /dev/null)
+        # shellcheck disable=SC2207
+        COMPREPLY=($(compgen -W "$versions" -- "$cur"))
+      else
+        # shellcheck disable=SC2207
+        COMPREPLY=($(compgen -W "$plugins" -- "$cur"))
+      fi
+      ;;
+    *)
+      local cmds='current global help install list list-all local plugin-add plugin-list plugin-list-all plugin-remove plugin-update reshim uninstall update where which '
+      # shellcheck disable=SC2207
+      COMPREPLY=($(compgen -W "$cmds" -- "$cur"))
+      ;;
+  esac
+
+  return 0
+}
+
+complete -F _asdf asdf