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bisect--helper: finish porting bisect_start() to C

Browse source 
Add the subcommand to `git bisect--helper` and call it from
git-bisect.sh.

With the conversion of `bisect_auto_next()` from shell to C in a
previous commit, `bisect_start()` can now be fully ported to C.

So let's complete the `--bisect-start` subcommand of
`git bisect--helper` so that it fully implements `bisect_start()`,
and let's use this subcommand in `git-bisect.sh` instead of
`bisect_start()`.

Note that the `eval` in the changed line of `git-bisect.sh` cannot be
dropped: it is necessary because the `rev` and the `tail`
variables may contain multiple, quoted arguments that need to be
passed to `bisect--helper` (without the quotes, naturally).

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>
Reviewed-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Pranit Bauva 2020-10-15 15:38:32 +02:00 committed by Junio C Hamano
parent 517ecb3161
commit 88ad372fc0
2 changed files with 29 additions and 38 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
builtin/bisect--helper.c
View file

@ -85,6 +85,19 @@ static int one_of(const char *term, ...)
return res;
}
/*
* return code BISECT_INTERNAL_SUCCESS_MERGE_BASE
* and BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND are codes
* that indicate special success.
*/
static int is_bisect_success(enum bisect_error res)
{
return !res ||
res == BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND ||
res == BISECT_INTERNAL_SUCCESS_MERGE_BASE;
}
static int write_in_file(const char *path, const char *mode, const char *format, va_list args)
{
FILE *fp = NULL;
@ -609,12 +622,13 @@ static enum bisect_error bisect_auto_next(struct bisect_terms *terms, const char
return bisect_next(terms, prefix);
}
static int bisect_start(struct bisect_terms *terms, const char **argv, int argc)
static enum bisect_error bisect_start(struct bisect_terms *terms, const char **argv, int argc)
{
int no_checkout = 0;
int first_parent_only = 0;
int i, has_double_dash = 0, must_write_terms = 0, bad_seen = 0;
int flags, pathspec_pos, res = 0;
int flags, pathspec_pos;
enum bisect_error res = BISECT_OK;
struct string_list revs = STRING_LIST_INIT_DUP;
struct string_list states = STRING_LIST_INIT_DUP;
struct strbuf start_head = STRBUF_INIT;
@ -754,14 +768,7 @@ static int bisect_start(struct bisect_terms *terms, const char **argv, int argc)
* Get rid of any old bisect state.
*/
if (bisect_clean_state())
return -1;
/*
* In case of mistaken revs or checkout error, or signals received,
* "bisect_auto_next" below may exit or misbehave.
* We have to trap this to be able to clean up using
* "bisect_clean_state".
*/
return BISECT_FAILED;
/*
* Write new start state
@ -778,7 +785,7 @@ static int bisect_start(struct bisect_terms *terms, const char **argv, int argc)
}
if (update_ref(NULL, "BISECT_HEAD", &oid, NULL, 0,
UPDATE_REFS_MSG_ON_ERR)) {
res = -1;
res = BISECT_FAILED;
goto finish;
}
}
@ -790,25 +797,31 @@ static int bisect_start(struct bisect_terms *terms, const char **argv, int argc)
for (i = 0; i < states.nr; i++)
if (bisect_write(states.items[i].string,
revs.items[i].string, terms, 1)) {
res = -1;
res = BISECT_FAILED;
goto finish;
}
if (must_write_terms && write_terms(terms->term_bad,
terms->term_good)) {
res = -1;
res = BISECT_FAILED;
goto finish;
}
res = bisect_append_log_quoted(argv);
if (res)
res = -1;
res = BISECT_FAILED;
finish:
string_list_clear(&revs, 0);
string_list_clear(&states, 0);
strbuf_release(&start_head);
strbuf_release(&bisect_names);
if (res)
return res;
res = bisect_auto_next(terms, NULL);
if (!is_bisect_success(res))
bisect_clean_state();
return res;
}

26
git-bisect.sh
View file

@ -49,27 +49,6 @@ bisect_head()
fi
}
bisect_start() {
git bisect--helper --bisect-start $@ || exit
#
# Change state.
# In case of mistaken revs or checkout error, or signals received,
# "bisect_auto_next" below may exit or misbehave.
# We have to trap this to be able to clean up using
# "bisect_clean_state".
#
trap 'git bisect--helper --bisect-clean-state' 0
trap 'exit 255' 1 2 3 15
#
# Check if we can proceed to the next bisect state.
#
git bisect--helper --bisect-auto-next || exit
trap '-' 0
}
bisect_skip() {
all=''
for arg in "$@"
@ -163,8 +142,7 @@ bisect_replay () {
get_terms
case "$command" in
start)
cmd="bisect_start $rev $tail"
eval "$cmd" ;;
eval "git bisect--helper --bisect-start $rev $tail" ;;
"$TERM_GOOD"|"$TERM_BAD"|skip)
git bisect--helper --bisect-write "$command" "$rev" "$TERM_GOOD" "$TERM_BAD" || exit;;
terms)
@ -264,7 +242,7 @@ case "$#" in
help)
git bisect -h ;;
start)
bisect_start "$@" ;;
git bisect--helper --bisect-start "$@" ;;
bad|good|new|old|"$TERM_BAD"|"$TERM_GOOD")
bisect_state "$cmd" "$@" ;;
skip)