@matheusbsbs / matheus-bagliano / commits / ffcb4e94d3

bisect: do not run show-branch just to show the current commit

In scripted versions of "git bisect", we used "git show-branch" to describe a single commit in the bisect log and also to the interactive user after checking out the next version to be tested. The former use of "git show-branch" was lost when the helper function that wrote bisect log entries was rewritten at 0f30233a (bisect--helper: `bisect_write` shell function in C, 2019-01-02) in C But we've kept the latter ever since 0871984d (bisect: make "git bisect" use new "--next-all" bisect-helper function, 2009-05-09) started using the faithful C-rewrite introduced at ef24c7ca (bisect--helper: add "--next-exit" to output bisect results, 2009-04-19). Showing "[<full hex>] <subject>" is simple enough with our helper pretty.c::format_commit_message() and spawning show-branch is an overkill. Let's lose one external process. Signed-off-by: Junio C Hamano <gitster@pobox.com>

Junio C Hamano committed Jul 27, 2021 at 11:22 UTC ffcb4e94d309db2889dac1d3dcbd0f4b2a0f6390
1 file changed +8 -8
bisect.c
+8 -8
index af2863d044..2b8b6546e9 100644 --- a/bisect.c +++ b/bisect.c @@ -23,7 +23,6 @@ static struct oid_array skipped_revs; static struct object_id *current_bad_oid; static const char *argv_checkout[] = {"checkout", "-q", NULL, "--", NULL}; -static const char *argv_show_branch[] = {"show-branch", NULL, NULL}; static const char *term_bad; static const char *term_good; @@ -729,6 +728,9 @@ static enum bisect_error bisect_checkout(const struct object_id *bisect_rev, int { 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; oid_to_hex_r(bisect_rev_hex, bisect_rev); update_ref(NULL, "BISECT_EXPECTED_REV", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR); @@ -748,13 +750,11 @@ static enum bisect_error bisect_checkout(const struct object_id *bisect_rev, int return -abs(res); } - argv_show_branch[1] = bisect_rev_hex; - res = run_command_v_opt(argv_show_branch, 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). - */ + commit = lookup_commit_reference(the_repository, bisect_rev); + format_commit_message(commit, "[%H] %s%n", &commit_msg, &pp); + fputs(commit_msg.buf, stdout); + strbuf_release(&commit_msg); + return -abs(res); }