There should be support for specific renaming of namespaces, for restoring from either archives and directory dumps. Currently, renaming isn't really possible with archives. With a directory dump, tinkering with the files can yield renaming, but isn't ideal.

Overview of potential changes:

• five new command line options:
  • '--nsExclude <ns-pattern>' excludes matching namespaces. Can be used in
    multiplicity.
  • '--nsInclude <ns-pattern>' includes matching namespaces. Can be used in
    multiplicity. Includes are processed before excludes, permitting their
    use in combination.
  • '--nsFrom <ns-pattern>' and '--nsTo <ns-pattern>' correspond to each
    other according to the order in which they are specified. Can be used in
    multiplicity.
  • '--dryRun' stops the program before any restoring begins.
• deprecated options:
  • --db, --collection, --excludeCollection, --excludeCollectionsWithPrefix
• namespace pattern: <ns-pattern>
  • permits includes/excludes/renames to refer to any namespace that
    matches a pattern comprised of wild cards, which match their smallest
    valid occurrence.
  • for all includes, all excludes, and simple replacements, asterisks may
    be used as wild cards. Replacements correspond linearly to matches.
    Literal asterisks and backslashes (*, \) must be backslash-escaped.
    • examples:
      • --nsFrom 'prod.*' --nsTo 'staging.*'
      • --nsFrom '*.user*' --nsTo '*.member*'
      • --nsExclude 'tests.*' --nsExclude '*.test*'
      • --nsInclude 'internal.*' --nsExclude '*.top_secret'
  • for more complex replacements, dollar sign-delimited wild cards can
    assign a matching variable in the form of '$var$'. Replacements do not
    need to be linear.
    • examples:
      • --nsFrom '$db$.user$stuff$' --nsTo 'user.$stuff$.$db$'
      • --nsFrom 'test_$stack$.$coll$' --nsTo 'recover.$stack$.$coll$'