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bisect: simplify return code from bisect_checkout()

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The function was designed to return only BISECT_OK (0) or
BISECT_FAILED (-1) and no other values, but there were two issues:

 - The comment misspelled BISECT_FAILED as BISECT_FAILURE, even
   though the logic it described (i.e. any non-zero return should be
   reported as a single BISECT_FAILED) was correct.

 - It took the return value from run_command_v_opt(), and assumed it
   was either -1 or 1 upon error, which is not the case; it can relay
   errors from wait_or_whine(), which can report exit status of the
   child process.

Translate any error return from run_command_v_opt() to BISECT_FAILED,
and simplify the resulting code by losing the 'res' variable that is
no longer needed.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2021-07-28 10:07:02 -07:00
parent ffcb4e94d3
commit 1fcc40cd1d
1 changed files with 4 additions and 6 deletions
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10
bisect.c
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@ -727,7 +727,6 @@ static int is_expected_rev(const struct object_id *oid)
static enum bisect_error bisect_checkout(const struct object_id *bisect_rev, int no_checkout)
{
char bisect_rev_hex[GIT_MAX_HEXSZ + 1];
enum bisect_error res = BISECT_OK;
struct commit *commit;
struct pretty_print_context pp = {0};
struct strbuf commit_msg = STRBUF_INIT;
@ -740,14 +739,13 @@ static enum bisect_error bisect_checkout(const struct object_id *bisect_rev, int
update_ref(NULL, "BISECT_HEAD", bisect_rev, NULL, 0,
UPDATE_REFS_DIE_ON_ERR);
} else {
res = run_command_v_opt(argv_checkout, RUN_GIT_CMD);
if (res)
if (run_command_v_opt(argv_checkout, RUN_GIT_CMD))
/*
* Errors in `run_command()` itself, signaled by res < 0,
* and errors in the child process, signaled by res > 0
* can both be treated as regular BISECT_FAILURE (-1).
* can both be treated as regular BISECT_FAILED (-1).
*/
return -abs(res);
return BISECT_FAILED;
}
commit = lookup_commit_reference(the_repository, bisect_rev);
@ -755,7 +753,7 @@ static enum bisect_error bisect_checkout(const struct object_id *bisect_rev, int
fputs(commit_msg.buf, stdout);
strbuf_release(&commit_msg);
return -abs(res);
return BISECT_OK;
}
static struct commit *get_commit_reference(struct repository *r,