From: Junio C Hamano Date: Mon, 5 Oct 2015 19:30:06 +0000 (-0700) Subject: Merge branch 'ad/bisect-terms' X-Git-Tag: v2.7.0-rc0~148 X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/22dd6eb31f85afebce81c0687e7532e78a12aa9d?hp=-c Merge branch 'ad/bisect-terms' The use of 'good/bad' in "git bisect" made it confusing to use when hunting for a state change that is not a regression (e.g. bugfix). The command learned 'old/new' and then allows the end user to say e.g. "bisect start --term-old=fast --term=new=slow" to find a performance regression. Michael's idea to make 'good/bad' more intelligent does have certain attractiveness ($gname/272867), and makes some of the work on this topic a moot point. * ad/bisect-terms: bisect: allow setting any user-specified in 'git bisect start' bisect: add 'git bisect terms' to view the current terms bisect: add the terms old/new bisect: sanity check on terms --- 22dd6eb31f85afebce81c0687e7532e78a12aa9d diff --combined bisect.c index 041a13d093,f7292cbac4..053d1a2ab9 --- a/bisect.c +++ b/bisect.c @@@ -19,6 -19,7 +19,6 @@@ static struct object_id *current_bad_oi static const char *argv_checkout[] = {"checkout", "-q", NULL, "--", NULL}; static const char *argv_show_branch[] = {"show-branch", NULL, NULL}; -static const char *argv_update_ref[] = {"update-ref", "--no-deref", "BISECT_HEAD", NULL, NULL}; static const char *term_bad; static const char *term_good; @@@ -428,13 -429,10 +428,13 @@@ static int read_bisect_refs(void return for_each_ref_in("refs/bisect/", register_ref, NULL); } +static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES") +static GIT_PATH_FUNC(git_path_bisect_expected_rev, "BISECT_EXPECTED_REV") + static void read_bisect_paths(struct argv_array *array) { struct strbuf str = STRBUF_INIT; - const char *filename = git_path("BISECT_NAMES"); + const char *filename = git_path_bisect_names(); FILE *fp = fopen(filename, "r"); if (!fp) @@@ -655,7 -653,7 +655,7 @@@ static void exit_if_skipped_commits(str static int is_expected_rev(const struct object_id *oid) { - const char *filename = git_path("BISECT_EXPECTED_REV"); + const char *filename = git_path_bisect_expected_rev(); struct stat st; struct strbuf str = STRBUF_INIT; FILE *fp; @@@ -677,16 -675,34 +677,16 @@@ return res; } -static void mark_expected_rev(char *bisect_rev_hex) -{ - int len = strlen(bisect_rev_hex); - const char *filename = git_path("BISECT_EXPECTED_REV"); - int fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600); - - if (fd < 0) - die_errno("could not create file '%s'", filename); - - bisect_rev_hex[len] = '\n'; - write_or_die(fd, bisect_rev_hex, len + 1); - bisect_rev_hex[len] = '\0'; - - if (close(fd) < 0) - die("closing file %s: %s", filename, strerror(errno)); -} - -static int bisect_checkout(char *bisect_rev_hex, int no_checkout) +static int bisect_checkout(const unsigned char *bisect_rev, int no_checkout) { + char bisect_rev_hex[GIT_SHA1_HEXSZ + 1]; - mark_expected_rev(bisect_rev_hex); + memcpy(bisect_rev_hex, sha1_to_hex(bisect_rev), GIT_SHA1_HEXSZ + 1); + update_ref(NULL, "BISECT_EXPECTED_REV", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR); argv_checkout[2] = bisect_rev_hex; if (no_checkout) { - argv_update_ref[3] = bisect_rev_hex; - if (run_command_v_opt(argv_update_ref, RUN_GIT_CMD)) - die("update-ref --no-deref HEAD failed on %s", - bisect_rev_hex); + update_ref(NULL, "BISECT_HEAD", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR); } else { int res; res = run_command_v_opt(argv_checkout, RUN_GIT_CMD); @@@ -730,6 -746,11 +730,11 @@@ static void handle_bad_merge_base(void "This means the bug has been fixed " "between %s and [%s].\n", bad_hex, bad_hex, good_hex); + } else if (!strcmp(term_bad, "new") && !strcmp(term_good, "old")) { + fprintf(stderr, "The merge base %s is new.\n" + "The property has changed " + "between %s and [%s].\n", + bad_hex, bad_hex, good_hex); } else { fprintf(stderr, "The merge base %s is %s.\n" "This means the first '%s' commit is " @@@ -762,11 -783,11 +767,11 @@@ static void handle_skipped_merge_base(c } /* - * "check_merge_bases" checks that merge bases are not "bad". + * "check_merge_bases" checks that merge bases are not "bad" (or "new"). * - * - If one is "bad", it means the user assumed something wrong + * - If one is "bad" (or "new"), it means the user assumed something wrong * and we must exit with a non 0 error code. - * - If one is "good", that's good, we have nothing to do. + * - 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. */ @@@ -788,7 -809,7 +793,7 @@@ static void check_merge_bases(int no_ch handle_skipped_merge_base(mb); } else { printf("Bisecting: a merge base must be tested\n"); - exit(bisect_checkout(sha1_to_hex(mb), no_checkout)); + exit(bisect_checkout(mb, no_checkout)); } } @@@ -932,6 -953,7 +937,6 @@@ int bisect_next_all(const char *prefix struct commit_list *tried; int reaches = 0, all = 0, nr, steps; const unsigned char *bisect_rev; - char bisect_rev_hex[GIT_SHA1_HEXSZ + 1]; read_bisect_terms(&term_bad, &term_good); if (read_bisect_refs()) @@@ -969,10 -991,11 +974,10 @@@ } bisect_rev = revs.commits->item->object.sha1; - memcpy(bisect_rev_hex, sha1_to_hex(bisect_rev), GIT_SHA1_HEXSZ + 1); if (!hashcmp(bisect_rev, current_bad_oid->hash)) { exit_if_skipped_commits(tried, current_bad_oid); - printf("%s is the first %s commit\n", bisect_rev_hex, + printf("%s is the first %s commit\n", sha1_to_hex(bisect_rev), term_bad); show_diff_tree(prefix, revs.commits->item); /* This means the bisection process succeeded. */ @@@ -985,7 -1008,7 +990,7 @@@ "(roughly %d step%s)\n", nr, (nr == 1 ? "" : "s"), steps, (steps == 1 ? "" : "s")); - return bisect_checkout(bisect_rev_hex, no_checkout); + return bisect_checkout(bisect_rev, no_checkout); } static inline int log2i(int n)