Get and maybe update a VS Code setting

code_settings.sh

# Usage: codeSettings <key> [<value>]
codeSettings() {
  SETTINGS_DIR="$HOME/Library/Application Support/Code/User"
  FILE="$SETTINGS_DIR/settings.json"
  
  KEY=$1
  VALUE=$2
  
  if ! command -v jq &> /dev/null; then
    echo -e "ERROR\n\tjq must be installed to process JSON"
    return 1
  fi

  if [ -z "$KEY" ]; then
    echo -e "ERROR\n\tUsage: codeSettings <key> [<value>]"
    return 1
  fi

  # Validate JSON first
  jq < "$FILE" &> /dev/null

  KEY_VALUE=$(jq ".\"$KEY\"" < "$FILE")

  if [ "$KEY_VALUE" = "null" ]; then
    echo "Key does not exist: \"$KEY\""
  else
    echo -e "Key exists:\n\t\"$KEY\": $KEY_VALUE"
  fi

  if [ "$KEY_VALUE" = "\"$VALUE\"" ]; then
    echo "Key already has desired value, skipping"
  elif [ "$VALUE" != "" ]; then
    # Backup file (you'll have to delete backup manually)
    cp "$FILE" "$FILE.bak"
    
    echo -e "Adding value to key:\n\t\"$KEY\": \"$VALUE\""
    jq ". += { \"$KEY\": \"$VALUE\" }" < "$FILE" > "$FILE.tmp"
    mv "$FILE.tmp" "$FILE"
  fi
}