From: Pranit Bauva <pranit.ba...@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 <negetive-value>`. Follow POSIX conventions to return
<negative-value> to indicate error.
Turn `exit()` to `return` calls in `check_merge_bases()`.
In `check_merge_bases()` there is an early success special case,
so we have introduced special error code `-11` which indicates early
success. This `-11` is converted back to `0` in
`check_good_are_ancestors_of_bad()`.
Mentored-by: Christian Couder <chrisc...@tuxfamily.org>
Mentored by: Johannes Schindelin <johannes.schinde...@gmx.de>
Signed-off-by: Pranit Bauva <pranit.ba...@gmail.com>
Signed-off-by: Tanushree Tumane <tanushreetum...@gmail.com>
---
bisect.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/bisect.c b/bisect.c
index 1f2f3201a3..1134854fe2 100644
--- a/bisect.c
+++ b/bisect.c
@@ -801,13 +801,16 @@ static void handle_skipped_merge_base(const struct
object_id *mb)
* "check_merge_bases" checks that merge bases are not "bad" (or "new").
*
* - If one is "bad" (or "new"), it means the user assumed something wrong
- * and we must exit with a non 0 error code.
+ * and we must return error with a non 0 error code.
* - If one is "good" (or "old"), that's good, we have nothing to do.
* - If one is "skipped", we can't know but we should warn.
* - If we don't know, we should check it out and ask the user to test.
+ * - If a merge base must be tested, on success return -11 a special condition
+ * for early success, this will be converted back to 0 in cmd_bisect__helper.
*/
-static void check_merge_bases(int rev_nr, struct commit **rev, int no_checkout)
+static int check_merge_bases(int rev_nr, struct commit **rev, int no_checkout)
{
+ int res = 0;
struct commit_list *result;
result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1);
@@ -822,11 +825,16 @@ static void check_merge_bases(int rev_nr, struct commit
**rev, int no_checkout)
handle_skipped_merge_base(mb);
} else {
printf(_("Bisecting: a merge base must be tested\n"));
- exit(-bisect_checkout(mb, no_checkout));
+ res = bisect_checkout(mb, no_checkout);
+ if (!res)
+ /* indicate early success */
+ res = -11;
+ break;
}
}
free_commit_list(result);
+ return res;
}
static int check_ancestors(int rev_nr, struct commit **rev, const char *prefix)
@@ -857,7 +865,7 @@ static void check_good_are_ancestors_of_bad(const char
*prefix, int no_checkout)
{
char *filename = git_pathdup("BISECT_ANCESTORS_OK");
struct stat st;
- int fd, rev_nr;
+ int fd, rev_nr, res = 0;
struct commit **rev;
if (!current_bad_oid)
@@ -874,8 +882,10 @@ static void check_good_are_ancestors_of_bad(const char
*prefix, int no_checkout)
/* Check if all good revs are ancestor of the bad rev. */
rev = get_bad_and_good_commits(&rev_nr);
if (check_ancestors(rev_nr, rev, prefix))
- check_merge_bases(rev_nr, rev, no_checkout);
+ res = check_merge_bases(rev_nr, rev, no_checkout);
free(rev);
+ if(res)
+ exit(res == -11 ? 0 : -res);
/* Create file BISECT_ANCESTORS_OK. */
fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600);
--
gitgitgadget
