[PATCH v1 0/5] Filter combination

This implements combining of filters. In any command which accepts the --filter flag, this patch allows specifying multiple filter flags or using the "combine:..." filter-spec form.

Combining filters means that only objects which are accepted by all filters get shown or included.

Compared to the RFC version of this patch set, the following notable changes and additions were made:

 - Simplification of the logic to execute combined filters.
 - Addition of test cases for existing logic and new logic.
 - Allowing to specify multiple --filter flags rather than requiring the
   combine: filter-spec form.
 - Require escaping a large number of reserved characters in "combine:..."
   filter specs in case we decide to do anything interesting with the filter
   language later.

Thank you,

Matthew DeVore (5):
  list-objects-filter: refactor into a context struct
  list-objects-filter-options: error is localizeable
  list-objects-filter: implement composite filters
  list-objects-filter-options: move error check up
  list-objects-filter-options: allow mult. --filter

 Documentation/rev-list-options.txt     |  14 ++
 builtin/fetch-pack.c                   |   5 +-
 builtin/rev-list.c                     |   5 +-
 contrib/completion/git-completion.bash |   2 +-
 fetch-pack.c                           |   5 +-
 list-objects-filter-options.c          | 252 +++++++++++++++++++++--
 list-objects-filter-options.h          |  17 +-
 list-objects-filter.c                  | 270 ++++++++++++++++---------
 list-objects-filter.h                  |  31 ++-
 list-objects.c                         |  45 ++---
 t/t5616-partial-clone.sh               |  19 ++
 t/t6112-rev-list-filters-objects.sh    | 193 +++++++++++++++++-
 transport.c                            |   5 +-
 upload-pack.c                          |  10 +-
 14 files changed, 708 insertions(+), 165 deletions(-)