From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
To: Miriam Rubio <mirucam@gmail.com>
Cc: git@vger.kernel.org, Pranit Bauva <pranit.bauva@gmail.com>,
Christian Couder <chriscool@tuxfamily.org>,
Tanushree Tumane <tanushreetumane@gmail.com>
Subject: Re: [PATCH 06/29] bisect: libify `exit_if_skipped_commits` to `error_if_skipped*` and its dependents
Date: Mon, 20 Jan 2020 22:57:40 +0100 (CET) [thread overview]
Message-ID: <nycvar.QRO.7.76.6.2001202253450.46@tvgsbejvaqbjf.bet> (raw)
In-Reply-To: <20200120143800.900-7-mirucam@gmail.com>
Hi Miriam,
On Mon, 20 Jan 2020, Miriam Rubio wrote:
> From: Pranit Bauva <pranit.bauva@gmail.com>
>
> Since we want to get rid of git-bisect.sh it would be necessary to
> convert those exit() calls to return statements so that errors can be
> reported.
>
> Emulate try catch in C by converting `exit(<positive-value>)` to
> `return <negative-value>`. Follow POSIX conventions to return
> <negative-value> to indicate error.
Good.
> Modify `cmd_bisect_helper()` to handle these negative returns.
>
> Turn `exit()` to `return` calls in `exit_if_skipped_commits()` and rename
> the method to `error_if_skipped_commits()`.
I would remove these two sentences, as I deem it obvious from the
rationale above that this needs to be done, and the patch repeats it.
>
> Handle this return in dependant function `bisect_next_all()`.
>
> Mentored-by: Christian Couder <chriscool@tuxfamily.org>
> Mentored-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
> Signed-off-by: Pranit Bauva <pranit.bauva@gmail.com>
> Signed-off-by: Tanushree Tumane <tanushreetumane@gmail.com>
> Signed-off-by: Miriam Rubio <mirucam@gmail.com>
> ---
> bisect.c | 23 ++++++++++++++++-------
> 1 file changed, 16 insertions(+), 7 deletions(-)
>
> diff --git a/bisect.c b/bisect.c
> index 83cb5b3a98..2ac0463327 100644
> --- a/bisect.c
> +++ b/bisect.c
> @@ -661,11 +661,11 @@ static void bisect_common(struct rev_info *revs)
> mark_edges_uninteresting(revs, NULL, 0);
> }
>
> -static void exit_if_skipped_commits(struct commit_list *tried,
> +static int error_if_skipped_commits(struct commit_list *tried,
> const struct object_id *bad)
> {
> if (!tried)
> - return;
> + return 0;
>
> printf("There are only 'skip'ped commits left to test.\n"
> "The first %s commit could be any of:\n", term_bad);
> @@ -676,7 +676,13 @@ static void exit_if_skipped_commits(struct commit_list *tried,
> if (bad)
> printf("%s\n", oid_to_hex(bad));
> printf(_("We cannot bisect more!\n"));
> - exit(2);
> +
> + /*
> + * We don't want to clean the bisection state
> + * as we need to get back to where we started
> + * by using `git bisect reset`.
> + */
> + return -2;
This comment is a good indicator that the constant `-2` here is a "magic"
number and it would most likely make sense to turn the return type from an
`int` into an `enum` instead.
> }
>
> static int is_expected_rev(const struct object_id *oid)
> @@ -949,7 +955,7 @@ int bisect_next_all(struct repository *r, const char *prefix, int no_checkout)
> {
> struct rev_info revs;
> struct commit_list *tried;
> - int reaches = 0, all = 0, nr, steps;
> + int reaches = 0, all = 0, nr, steps, res;
> struct object_id *bisect_rev;
> char *steps_msg;
>
> @@ -972,8 +978,9 @@ int bisect_next_all(struct repository *r, const char *prefix, int no_checkout)
> * We should exit here only if the "bad"
> * commit is also a "skip" commit.
> */
> - exit_if_skipped_commits(tried, NULL);
> -
> + res = error_if_skipped_commits(tried, NULL);
> + if (res)
> + exit(-res);
So we still `exit()` in `libgit.a`? I hoped for a more thorough
libification.
Besides, the `if (res)` probably wants to be an `if (res < 0)`, right?
Ciao,
Johannes
> printf(_("%s was both %s and %s\n"),
> oid_to_hex(current_bad_oid),
> term_good,
> @@ -990,7 +997,9 @@ int bisect_next_all(struct repository *r, const char *prefix, int no_checkout)
> bisect_rev = &revs.commits->item->object.oid;
>
> if (oideq(bisect_rev, current_bad_oid)) {
> - exit_if_skipped_commits(tried, current_bad_oid);
> + res = error_if_skipped_commits(tried, current_bad_oid);
> + if (res)
> + exit(-res);
> printf("%s is the first %s commit\n", oid_to_hex(bisect_rev),
> term_bad);
> show_diff_tree(r, prefix, revs.commits->item);
> --
> 2.21.1 (Apple Git-122.3)
>
>
next prev parent reply other threads:[~2020-01-20 21:57 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 14:37 [Outreachy][PATCH 00/29] Finish converting git bisect to C part 1 Miriam Rubio
2020-01-20 14:37 ` [PATCH 01/29] bisect--helper: convert `vocab_*` char pointers to char arrays Miriam Rubio
2020-01-20 14:37 ` [PATCH 02/29] bisect--helper: change `retval` to `res` Miriam Rubio
2020-01-20 14:37 ` [PATCH 03/29] bisect: use the standard 'if (!var)' way to check for 0 Miriam Rubio
2020-01-20 14:37 ` [PATCH 04/29] run-command: make `exists_in_PATH()` non-static Miriam Rubio
2020-01-20 14:37 ` [PATCH 05/29] bisect--helper: introduce new `decide_next()` function Miriam Rubio
2020-01-20 14:37 ` [PATCH 06/29] bisect: libify `exit_if_skipped_commits` to `error_if_skipped*` and its dependents Miriam Rubio
2020-01-20 21:57 ` Johannes Schindelin [this message]
2020-01-21 6:40 ` Christian Couder
2020-01-21 10:00 ` Miriam R.
2020-01-20 14:37 ` [PATCH 07/29] bisect: libify `bisect_checkout` Miriam Rubio
2020-01-20 14:37 ` [PATCH 08/29] bisect: libify `check_merge_bases` and its dependents Miriam Rubio
2020-01-20 22:09 ` Johannes Schindelin
2020-01-21 9:59 ` Miriam R.
2020-01-20 14:37 ` [PATCH 09/29] bisect: libify `check_good_are_ancestors_of_bad` " Miriam Rubio
2020-01-20 22:20 ` Johannes Schindelin
2020-01-21 6:59 ` Christian Couder
2020-01-21 10:00 ` Miriam R.
2020-01-20 14:37 ` [PATCH 10/29] bisect: libify `handle_bad_merge_base` " Miriam Rubio
2020-01-20 22:23 ` Johannes Schindelin
2020-01-21 7:05 ` Christian Couder
2020-01-21 10:00 ` Miriam R.
2020-01-20 14:37 ` [PATCH 11/29] bisect: libify `bisect_next_all` Miriam Rubio
2020-01-20 22:29 ` Johannes Schindelin
2020-01-21 7:15 ` Christian Couder
2020-01-30 15:18 ` Johannes Schindelin
2020-01-20 14:37 ` [PATCH 12/29] bisect--helper: reimplement `bisect_next` and `bisect_auto_next` shell functions in C Miriam Rubio
2020-01-30 22:47 ` Johannes Schindelin
2020-01-31 10:53 ` Miriam R.
2020-02-17 7:20 ` Christian Couder
2020-02-17 22:00 ` Johannes Schindelin
2020-01-20 14:37 ` [PATCH 13/29] bisect--helper: finish porting `bisect_start()` to C Miriam Rubio
2020-01-20 14:37 ` [PATCH 14/29] bisect--helper: retire `--bisect-clean-state` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 15/29] bisect--helper: retire `--next-all` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 16/29] bisect--helper: reimplement `bisect_autostart` shell function in C Miriam Rubio
2020-01-20 14:37 ` [PATCH 17/29] bisect--helper: reimplement `bisect_state` & `bisect_head` shell functions " Miriam Rubio
2020-01-20 14:37 ` [PATCH 18/29] bisect--helper: retire `--check-expected-revs` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 19/29] bisect--helper: retire `--write-terms` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 20/29] bisect--helper: reimplement `bisect_log` shell function in C Miriam Rubio
2020-01-20 14:37 ` [PATCH 21/29] bisect--helper: reimplement `bisect_replay` " Miriam Rubio
2020-01-20 14:37 ` [PATCH 22/29] bisect--helper: retire `--bisect-write` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 23/29] bisect--helper: use `res` instead of return in BISECT_RESET case option Miriam Rubio
2020-01-20 14:37 ` [PATCH 24/29] bisect--helper: retire `--bisect-autostart` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 25/29] bisect--helper: retire `--bisect-auto-next` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 26/29] bisect--helper: reimplement `bisect_skip` shell function in C Miriam Rubio
2020-01-20 14:37 ` [PATCH 27/29] bisect--helper: retire `--check-and-set-terms` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 28/29] bisect--helper: reimplement `bisect_visualize()`shell function in C Miriam Rubio
2020-01-20 14:38 ` [PATCH 29/29] bisect--helper: reimplement `bisect_run` shell " Miriam Rubio
2020-01-20 21:41 ` [Outreachy][PATCH 00/29] Finish converting git bisect to C part 1 Johannes Schindelin
2020-01-20 23:24 ` Christian Couder
2020-01-30 15:12 ` Johannes Schindelin
2020-01-30 21:12 ` Junio C Hamano
2020-01-21 8:44 ` Miriam R.
2020-01-30 15:13 ` Johannes Schindelin
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