[PATCH v2 00/11] Turn git-bisect to be builtin

["Đoàn Trần Công Danh" <congdanhqx@gmail.com>]

This series finish the git-bisect porting from shell script into a C builtin.

This series can't be applied cleaned on master, it needs to be applied on top
of the series posted at:
https://lore.kernel.org/git/cover.1668097286.git.congdanhqx@gmail.com/
AND the series rs/no-more-run-command-v, which has been integrated to next.

Johannes Schindelin (2):
  bisect--helper: handle states directly
  Turn `git bisect` into a full built-in

Ævar Arnfjörð Bjarmason (4):
  bisect tests: test for v2.30.0 "bisect run" regressions
  bisect: refactor bisect_run() to match CodingGuidelines
  bisect test: test exit codes on bad usage
  bisect--helper: emit usage for "git bisect"

Đoàn Trần Công Danh (5):
  bisect: fix output regressions in v2.30.0
  bisect run: keep some of the post-v2.30.0 output
  bisect-run: verify_good: account for non-negative exit status
  bisect--helper: identify as bisect when report error
  bisect--helper: log: allow arbitrary number of arguments

 Makefile                               |   3 +-
 builtin.h                              |   2 +-
 builtin/{bisect--helper.c => bisect.c} | 126 ++++++++++++---------
 git-bisect.sh                          |   4 -
 git.c                                  |   2 +-
 t/t6030-bisect-porcelain.sh            | 148 +++++++++++++++++++++++++
 6 files changed, 225 insertions(+), 60 deletions(-)
 rename builtin/{bisect--helper.c => bisect.c} (92%)

Range-diff against v1:
 1:  5571bc36b8 !  1:  b6fd4ecd66 bisect tests: test for v2.30.0 "bisect run" regressions
    @@ Commit message
         with 127. That edge case is a bit too insane to preserve, so let's not
         add it to these regression tests.
     
    +    There was another regression that 'git bisect' consumed some options
    +    that was meant to passed down to program run with 'git bisect run'.
    +    Since that regression is breaking user's expectation, it has been fixed
    +    earlier without this patch queued.
    +
         1. 0a4cb1f1f2f (Merge branch 'mr/bisect-in-c-4', 2021-09-23)
         2. d1bbbe45df8 (bisect--helper: reimplement `bisect_run` shell
            function in C, 2021-09-13)
    @@ t/t6030-bisect-porcelain.sh: test_expect_success 'bisect skip: with commit both
     +	test_cmp expect.args actual.args
     +}
     +
    -+test_expect_failure 'git bisect run: args, stdout and stderr with no arguments' '
    -+	test_bisect_run_args <<-\EOF_ARGS 6<<-EOF_OUT 7<<-\EOF_ERR
    ++test_expect_failure 'git bisect run: args, stdout and stderr with no arguments' "
    ++	test_bisect_run_args <<-'EOF_ARGS' 6<<-EOF_OUT 7<<-'EOF_ERR'
     +	EOF_ARGS
     +	running ./run.sh
     +	$HASH4 is the first bad commit
     +	bisect run success
     +	EOF_OUT
     +	EOF_ERR
    -+'
    ++"
     +
    -+test_expect_failure 'git bisect run: args, stdout and stderr: "--" argument' '
    -+	test_bisect_run_args -- <<-\EOF_ARGS 6<<-EOF_OUT 7<<-\EOF_ERR
    ++test_expect_failure 'git bisect run: args, stdout and stderr: "--" argument' "
    ++	test_bisect_run_args -- <<-'EOF_ARGS' 6<<-EOF_OUT 7<<-'EOF_ERR'
     +	<-->
     +	EOF_ARGS
     +	running ./run.sh --
    @@ t/t6030-bisect-porcelain.sh: test_expect_success 'bisect skip: with commit both
     +	bisect run success
     +	EOF_OUT
     +	EOF_ERR
    -+'
    ++"
     +
    -+test_expect_failure 'git bisect run: args, stdout and stderr: "--log foo --no-log bar" arguments' '
    -+	test_bisect_run_args --log foo --no-log bar <<-\EOF_ARGS 6<<-EOF_OUT 7<<-\EOF_ERR
    ++test_expect_failure 'git bisect run: args, stdout and stderr: "--log foo --no-log bar" arguments' "
    ++	test_bisect_run_args --log foo --no-log bar <<-'EOF_ARGS' 6<<-EOF_OUT 7<<-'EOF_ERR'
     +	<--log>
     +	<foo>
     +	<--no-log>
    @@ t/t6030-bisect-porcelain.sh: test_expect_success 'bisect skip: with commit both
     +	bisect run success
     +	EOF_OUT
     +	EOF_ERR
    -+'
    ++"
     +
    -+test_expect_failure 'git bisect run: args, stdout and stderr: "--bisect-start" argument' '
    -+	test_bisect_run_args --bisect-start <<-\EOF_ARGS 6<<-EOF_OUT 7<<-\EOF_ERR
    ++test_expect_failure 'git bisect run: args, stdout and stderr: "--bisect-start" argument' "
    ++	test_bisect_run_args --bisect-start <<-'EOF_ARGS' 6<<-EOF_OUT 7<<-'EOF_ERR'
     +	<--bisect-start>
     +	EOF_ARGS
     +	running ./run.sh --bisect-start
    @@ t/t6030-bisect-porcelain.sh: test_expect_success 'bisect skip: with commit both
     +	bisect run success
     +	EOF_OUT
     +	EOF_ERR
    -+'
    ++"
     +
      # We want to automatically find the commit that
      # added "Another" into hello.
 2:  dc6ed4c453 =  2:  d82c7eaabf bisect: refactor bisect_run() to match CodingGuidelines
 3:  8a815e2311 <  -:  ---------- bisect--helper: pass arg[cv] down to do_bisect_run
 4:  31cd78f538 <  -:  ---------- bisect: fix output regressions in v2.30.0
 5:  5ba3bafdd4 <  -:  ---------- bisect run: keep some of the post-v2.30.0 output
 6:  32ad47ddc5 <  -:  ---------- bisect--helper: remove unused arguments from do_bisect_run
 -:  ---------- >  3:  912f32ceda bisect: fix output regressions in v2.30.0
 -:  ---------- >  4:  17bef3e951 bisect run: keep some of the post-v2.30.0 output
 -:  ---------- >  5:  d6c57af9cc bisect-run: verify_good: account for non-negative exit status
 7:  f212e64288 !  6:  8039b010c8 bisect--helper: pretend we're real bisect when report error
    @@ Metadata
     Author: Đoàn Trần Công Danh <congdanhqx@gmail.com>
     
      ## Commit message ##
    -    bisect--helper: pretend we're real bisect when report error
    +    bisect--helper: identify as bisect when report error
     
         In a later change, we will convert the bisect--helper to be builtin
    -    bisect. Let's start by pretending it's the real bisect when reporting
    +    bisect. Let's start by self-identifying it's the real bisect when reporting
         error.
     
    +    This change is safe since 'git bisect--helper' is an implementation
    +    detail, users aren't expected to call 'git bisect--helper'.
    +
         Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
     
      ## builtin/bisect--helper.c ##
    @@ builtin/bisect--helper.c: static int bisect_run(struct bisect_terms *terms, cons
      }
      
     @@ builtin/bisect--helper.c: static int cmd_bisect__terms(int argc, const char **argv, const char *prefix UNU
    - 	struct bisect_terms terms = { .term_good = NULL, .term_bad = NULL };
    + 	struct bisect_terms terms = { 0 };
      
      	if (argc > 1)
     -		return error(_("--bisect-terms requires 0 or 1 argument"));
    @@ builtin/bisect--helper.c: static int cmd_bisect__terms(int argc, const char **ar
      	free_terms(&terms);
      	return res;
     @@ builtin/bisect--helper.c: static int cmd_bisect__next(int argc, const char **argv UNUSED, const char *pref
    - 	struct bisect_terms terms = { .term_good = NULL, .term_bad = NULL };
    + 	struct bisect_terms terms = { 0 };
      
      	if (argc)
     -		return error(_("--bisect-next requires 0 arguments"));
    @@ builtin/bisect--helper.c: static int cmd_bisect__state(int argc, const char **ar
      }
      
     @@ builtin/bisect--helper.c: static int cmd_bisect__run(int argc, const char **argv, const char *prefix UNUSE
    - 	struct bisect_terms terms = { .term_good = NULL, .term_bad = NULL };
    + 	struct bisect_terms terms = { 0 };
      
      	if (!argc)
     -		return error(_("bisect run failed: no command provided."));
 8:  4c1beb8bf8 =  7:  7c43abfcef bisect test: test exit codes on bad usage
 9:  b494a4cf4e =  8:  4500867d56 bisect--helper: emit usage for "git bisect"
10:  a53e0c61ca !  9:  3752c0348b bisect--helper: make `state` optional
    @@ Metadata
     Author: Johannes Schindelin <Johannes.Schindelin@gmx.de>
     
      ## Commit message ##
    -    bisect--helper: make `state` optional
    +    bisect--helper: handle states directly
     
         In preparation for making `git bisect` a real built-in, let's prepare
         the `bisect--helper` built-in to handle `git bisect--helper good` and
    -    `git bisect--helper bad`, i.e. do not require the `state` subcommand to
    -    be passed explicitly.
    +    `git bisect--helper bad`, i.e. eliminate the need of `state` subcommand.
     
         Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
         Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
     
      ## builtin/bisect--helper.c ##
    +@@ builtin/bisect--helper.c: static int cmd_bisect__next(int argc, const char **argv UNUSED, const char *pref
    + 	return res;
    + }
    + 
    +-static int cmd_bisect__state(int argc, const char **argv, const char *prefix UNUSED)
    +-{
    +-	int res;
    +-	struct bisect_terms terms = { 0 };
    +-
    +-	set_terms(&terms, "bad", "good");
    +-	get_terms(&terms);
    +-	res = bisect_state(&terms, argv, argc);
    +-	free_terms(&terms);
    +-	return res;
    +-}
    +-
    + static int cmd_bisect__log(int argc, const char **argv UNUSED, const char *prefix UNUSED)
    + {
    + 	if (argc)
    +@@ builtin/bisect--helper.c: int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
    + 		OPT_SUBCOMMAND("terms", &fn, cmd_bisect__terms),
    + 		OPT_SUBCOMMAND("start", &fn, cmd_bisect__start),
    + 		OPT_SUBCOMMAND("next", &fn, cmd_bisect__next),
    +-		OPT_SUBCOMMAND("state", &fn, cmd_bisect__state),
    + 		OPT_SUBCOMMAND("log", &fn, cmd_bisect__log),
    + 		OPT_SUBCOMMAND("replay", &fn, cmd_bisect__replay),
    + 		OPT_SUBCOMMAND("skip", &fn, cmd_bisect__skip),
     @@ builtin/bisect--helper.c: int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
      		OPT_SUBCOMMAND("run", &fn, cmd_bisect__run),
      		OPT_END()
11:  8037667da0 <  -:  ---------- bisect--helper: remove subcommand state
12:  3b13350977 = 10:  de3075eff9 bisect--helper: log: allow arbitrary number of arguments
13:  0441cf2554 = 11:  dadca7adbe Turn `git bisect` into a full built-in
-- 
2.38.1.157.gedabe22e0a