Shell functions to manage OpenEmu shaders. Copy into your .zshrc file. Requires fzf. Not tested in bash.

oeshader.sh

# OpenEmu shader functions. Requires fzf.
function oeshader.search {
  defaults find videoShader.openemu | grep $@
}
function oeshader.copy {
  local source=`oeshader.ls ${@:-1} | fzf --header="Select source:"`
  if [[ -n $source ]]; then
    oeshader.search -oE "system\.[a-z0-9]*" | sort -u |
      fzf -m --header="Apply settings from \"${source##*.}\"." |
        while read -r k; do
          defaults write org.openemu.OpenEmu videoShader.openemu.$k.${source##*.}.params\
            -string `defaults read org.openemu.OpenEmu videoShader.openemu.$source.params`
          echo "added $k.${source##*.}"
        done
  fi
}
function oeshader.clear {
  oeshader.ls ${@:-1} | fzf -m --header="Clear item(s):" |
    while read -r k; do
      defaults delete org.openemu.OpenEmu videoShader.openemu.$k.params
      echo "cleared $k"
    done
}
function oeshader.ls {
  local i=${@:-1}
  local options=( system preset \(preset\|system\) )
  oeshader.search --color=never -oE "$options[$i](\.[^.]*){2}"
}
function oeshader.ls-all {
  oeshader.ls 3
}
function oeshader.ls-preset {
  oeshader.ls 2
}
function oeshader.apply-preset {
  oeshader.copy 2
}
# Optionally pass in the label.
# No validation involved. Stick to alphanumeric characters and spaces. Dot's are a big no no.
function oeshader.add-preset {
  local source=`oeshader.ls 3 | fzf --header="Select source:"`
  local k=${@:-default}
  if [[ -n $source ]]; then
    defaults write org.openemu.OpenEmu videoShader.openemu.preset.$k.${source##*.}.params\
      -string `defaults read org.openemu.OpenEmu videoShader.openemu.$source.params`
    echo "added preset.$k.${source##*.}"
  fi
}
function oeshader.clear-preset {
  oeshader.clear 2
}

More info...