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bisect--helper: reimplement bisect_next and bisect_auto_next shell functions in C

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Reimplement the `bisect_next()` and the `bisect_auto_next()` shell functions
in C and add the subcommands to `git bisect--helper` to call them from
git-bisect.sh .

bisect_auto_next() function returns an enum bisect_error type as whole
`git bisect` can exit with an error code when bisect_next() does.

Return an error when `bisect_next()` fails, that fix a bug on shell script
version.

Using `--bisect-next` and `--bisect-auto-next` subcommands is a
temporary measure to port shell function to C so as to use the existing
test suite. As more functions are ported, `--bisect-auto-next`
subcommand will be retired and will be called by some other methods.

Mentored-by: Lars Schneider <larsxschneider@gmail.com>
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>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Pranit Bauva
2020-09-24 14:33:40 +02:00
committed by Junio C Hamano
parent c7a7f48f4f
commit 517ecb3161
3 changed files with 191 additions and 47 deletions
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11
bisect.c
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@@ -988,8 +988,11 @@ void read_bisect_terms(const char **read_bad, const char **read_good)
* the bisection process finished successfully.
* In this case the calling function or command should not turn a
* BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND return code into an error or a non zero exit code.
* If no_checkout is non-zero, the bisection process does not
* checkout the trial commit but instead simply updates BISECT_HEAD.
*
* Checking BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND
* in bisect_helper::bisect_next() and only transforming it to 0 at
* the end of bisect_helper::cmd_bisect__helper() helps bypassing
* all the code related to finding a commit to test.
*/
enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
{
@@ -999,6 +1002,10 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
enum bisect_error res = BISECT_OK;
struct object_id *bisect_rev;
char *steps_msg;
/*
* If no_checkout is non-zero, the bisection process does not
* checkout the trial commit but instead simply updates BISECT_HEAD.
*/
int no_checkout = ref_exists("BISECT_HEAD");
unsigned bisect_flags = 0;