[PATCH v6 00/10] Add --graft option to git replace

Here is a small series to implement:

        git replace [-f] --graft <commit> [<parent>...]

This patch series goes on top of the patch series that implements --edit.

The changes since v5, thanks to Junio, are:

- new patch 1/10 to clean up redirection style in t6050

- new patches 8/10, 9/10 and 10/10 to check mergetags

- add functions to test parents in patch 3/10 and 7/10

- improve testing signed commits in patch 7/10

- improve warning when removing commit signature in
  patch 6/10

Christian Couder (10):
  replace: cleanup redirection style in tests
  replace: add --graft option
  replace: add test for --graft
  Documentation: replace: add --graft option
  contrib: add convert-grafts-to-replace-refs.sh
  replace: remove signature when using --graft
  replace: add test for --graft with signed commit
  commit: add for_each_mergetag()
  replace: check mergetags when using --graft
  replace: add test for --graft with a mergetag

 Documentation/git-replace.txt             |  10 +++
 builtin/replace.c                         | 126 +++++++++++++++++++++++++++-
 commit.c                                  |  47 +++++++++++
 commit.h                                  |   7 ++
 contrib/convert-grafts-to-replace-refs.sh |  28 +++++++
 log-tree.c                                |  15 +---
 t/t6050-replace.sh                        | 135 ++++++++++++++++++++++++------
 7 files changed, 332 insertions(+), 36 deletions(-)
 create mode 100755 contrib/convert-grafts-to-replace-refs.sh