[PATCH v2 0/8] completion: add option completion for most builtin commands

This series adds option completion for many more commands. More importantly it introduces a generic completion function __git_complete_common(). With --git-completion-helper providing more and more information in future, this function can start to replace many other _git_xxx() in this file.

Nguyễn Thái Ngọc Duy (8):
  git.c: move cmd_struct declaration up
  git.c: add hidden option --list-parseopt-builtins
  completion: mention the oldest version we need to support
  completion: factor out _git_xxx calling code
  completion: add --option completion for most builtin commands
  completion: delete option-only completion commands
  completion: use __gitcomp_builtin in _git_ls_tree
  completion: use __gitcomp_builtin in _git_cherry

 contrib/completion/git-completion.bash |  75 +++++++++++----
 git.c                                  | 122 +++++++++++++------------
 t/t9902-completion.sh                  |   6 ++
 3 files changed, 127 insertions(+), 76 deletions(-)