[PATCH v4 00/13] Finish converting git bisect to C part 2

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.

These patch series emails were generated from: https://gitlab.com/mirucam/git/commits/git-bisect-work-part2-v4.

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

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

* Rebase on master branch: f402ea6816 (The fifth batch, 2020-06-25)
* Improve commit messages.

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

[3/12] bisect--helper: introduce new `write_in_file()` function

* Add a wrapper for "w" mode.
* Adapt calls to new wrapper.

--

[4/12] bisect--helper: reimplement `bisect_autostart` shell function in C

* Add file_is_not_empty() function and call.
* Change fprintf to fprintf_ln.
* !isatty(STDIN_FILENO) returns 0 instead of 1.
* Change bisect_autostart() return implementation.
* Move bisect_autostart() previous header declaration to patch [6/12].
* Change some error and user messages.

-- [5/12] bisect: call 'clear_commit_marks_all()' in 'bisect_next_all()'

* New patch splitted from [6/12] patch.

--

[6/12] bisect--helper: reimplement `bisect_next` and `bisect_auto_next` shell functions in C

* Add struct add_bisect_ref_data.
* Add wrapper append_to_file() and adapt calls.
* Remove register_good_ref() and prepare_rev_argv() functions.
* Add add_bisect_ref() function.
* Reimplementation of prepare_revs() function.
* Include process_skipped_commits() code in bisect_skipped_commits().
* Use lookup_commit_reference_by_name() instead of lookup_commit_reference().

--

[7/12] bisect--helper: finish porting `bisect_start()` to C

* Amend code comments.
* Add is_bisect_success() function and call.
* git-bisect.sh: merge with master changes.

--

[10/12] bisect--helper: reimplement `bisect_state` & `bisect_head` shell functions in C

* Remove bisect_head() function.
* Add mark_for_removal() function.
* Reimplement bisect_state().

--
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 (9):
  bisect--helper: reimplement `bisect_autostart` shell function in C
  bisect--helper: reimplement `bisect_next` and `bisect_auto_next` shell
    functions in C
  bisect--helper: finish porting `bisect_start()` to C
  bisect--helper: retire `--bisect-clean-state` subcommand
  bisect--helper: retire `--next-all` subcommand
  bisect--helper: reimplement `bisect_state` & `bisect_head` shell
    functions in C
  bisect--helper: retire `--check-expected-revs` subcommand
  bisect--helper: retire `--write-terms` subcommand
  bisect--helper: retire `--bisect-autostart` subcommand

 bisect.c                 |   8 +
 builtin/bisect--helper.c | 452 ++++++++++++++++++++++++++++++++-------
 git-bisect.sh            | 145 +------------
 3 files changed, 387 insertions(+), 218 deletions(-)