#       is returned if no API keys are currently configured.  The prefix
  #       argument is an extra variable name prefix to check prior to any
  #       that are already configured.
  #
  # <internal>
  proc getApiKeys { {prefix ""} } {
    global env
    variable autoApiKeys

    #
    # NOTE: If the caller specified a variable name prefix, try to use it
    #       first.
    #
    set prefixes [list]

    if {[string length $prefix] > 0} then {
      lappend prefixes $prefix
    }

    #
    # NOTE: Next, fallback to the variable name prefix for this package.
    #
    lappend prefixes [getLookupVarNamePrefix]

    #
    # NOTE: Try each variable name prefix, in order, until a set of API
    #       keys is found.
    #
    foreach prefix $prefixes {
      #
      # NOTE: If an empty prefix is seen, force it to use the "api_keys"
      #       variable from the global namespace.
      #
      if {[string length $prefix] == 0} then {
        set prefix ::; # TODO: Make non-global?
      }

      #
      # NOTE: Check for the variable, in whatever namespace it resides,
      #       and return its value verbatim if it exists.
      #
      set varName [appendArgs $prefix api_keys]

      if {[info exists $varName]} then {
        return [set $varName]
      }

      #
      # NOTE: Fallback to using an environment variable with the same
      #       base name and returns its value verbatim if it exists.
      #
      set varName [string trim $varName :]

      if {[info exists env($varName)]} then {
        return $env($varName)
      }
    }

    #
    # NOTE: If there is a default list of API keys, just return it.
    #
    if {[info exists autoApiKeys] && [llength $autoApiKeys] > 0} then {
      return $autoApiKeys
    }

    #
    # NOTE: Otherwise, return the system default, which is "anonymous"
    #       packages only (i.e. those without any owners).
    #
    return [list]
  }

  #
  # NOTE: This procedure returns the base URI for the package repository
  #       server.  There are no arguments.
  #
  proc getLookupBaseUri {} {

  # NOTE: This procedure performs initial setup of the package repository
  #       client, using the current configuration parameters.  There are
  #       no arguments.  It may load the Garuda package when evaluated in
  #       native Tcl.  It may load a native Tcl library when evaluated in
  #       Eagle.  It may install the [package unknown] hook.
  #
  proc setupPackageUnknownHandler {} {
    variable autoApiKeys
    variable autoHook
    variable autoLoadTcl
    variable autoRequireGaruda

    #
    # NOTE: Should we attempt to automatically load the Garuda package for
    #       native Tcl?


  #
  # NOTE: This procedure sets up the default values for all configuration
  #       parameters used by the package repository client.  There are no
  #       arguments.
  #
  proc setupPackageUnknownVars {} {
    #
    # NOTE: What is the default set of API keys if none were set explicitly?
    #       This list is subject to change at any time -AND- may be empty or
    #       may contain non-working API keys, please do not rely on it.
    #
    variable autoApiKeys; # DEFAULT: 0000000000000000000000000000000000000000

    if {![info exists autoApiKeys]} then {
      set autoApiKeys [list 0000000000000000000000000000000000000000]
    }

    #
    # NOTE: Automatically install our [package unknown] handler when this
    #       package is loaded?
    #
    variable autoHook; # DEFAULT: true

    if {![info exists autoHook]} then {