[PATCH v8 0/6] Finish converting git bisect to C part 2 subset 1

These patches correspond to a second part of patch series of Outreachy project "Finish converting `git bisect` from shell to C" started by Pranit Bauva and Tanushree Tumane (https://public-inbox.org/git/pull.117.git.gitgitgadget@gmail.com) and continued by me.

This patch series version is composed by the first six patches of the previous version due to a bug discovered during the test stage, that affects the rest of the patches and that needs to be fixed before sending them.

These patch series emails were generated from: https://gitlab.com/mirucam/git/commits/git-bisect-work-part2-v8-subset1.

I would like to thank Johannes Schindelin for reviewing this patch series and to Christian Couder for his advice and help.

General changes ---------------

* Rebased on 385c171a01, (Fifteenth batch, 2020-09-18) to update command
help messages.

Specific changes ----------------

[4/6] bisect--helper: reimplement `bisect_autostart` shell function in C

* Amend commit message.
* Change to `return -1` when we cannot autostart.
* Add `|| exit` to bisect-autostart call in shell script.

---

[6/6] bisect--helper: reimplement `bisect_next` and `bisect_auto_next` shell
 functions in C
 
* Amend commit message.
* Amend new modes order in cmdmode enum.
* Add `|| exit` to bisect-auto-next call in shell script.

 
---

Miriam Rubio (4):
  bisect--helper: BUG() in cmd_*() on invalid subcommand
  bisect--helper: use '-res' in 'cmd_bisect__helper' return
  bisect--helper: introduce new `write_in_file()` function
  bisect: call 'clear_commit_marks_all()' in 'bisect_next_all()'

Pranit Bauva (2):
  bisect--helper: reimplement `bisect_autostart` shell function in C
  bisect--helper: reimplement `bisect_next` and `bisect_auto_next` shell
    functions in C

 bisect.c                 |  13 +-
 builtin/bisect--helper.c | 269 +++++++++++++++++++++++++++++++++++++--
 git-bisect.sh            |  70 +---------
 3 files changed, 274 insertions(+), 78 deletions(-)