RVM plugin

plugins/rvm/rvm.fish

+function rvm -d 'Ruby enVironment Manager'
+  # run RVM and capture the resulting environment
+  set -l env_file (mktemp -t rvm.fish.XXXXXXXXXX)
+  bash -c 'source ~/.rvm/scripts/rvm; rvm "$@"; status=$?; env > "$0"; exit $status' $env_file $argv
+
+  # apply rvm_* and *PATH variables from the captured environment
+  and eval (grep '^rvm\|^[^=]*PATH' $env_file | sed '/^[^=]*PATH/y/:/ /; s/^/set -xg /; s/=/ /; s/$/ ;/; s/(//; s/)//')
+  # clean up
+  rm -f $env_file
+end