From: Junio C Hamano Date: Tue, 3 Nov 2015 23:13:09 +0000 (-0800) Subject: Merge branch 'mk/blame-first-parent' X-Git-Tag: v2.7.0-rc0~42 X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/6784eb5ad93da15d24a5d111a3d6df618f98532f?ds=inline;hp=-c Merge branch 'mk/blame-first-parent' "git blame" learnt to take "--first-parent" and "--reverse" at the same time when it makes sense. * mk/blame-first-parent: blame: allow blame --reverse --first-parent when it makes sense blame: extract find_single_final blame: test to describe use of blame --reverse --first-parent --- 6784eb5ad93da15d24a5d111a3d6df618f98532f diff --combined builtin/blame.c index 3b80e8fd75,861a5372b9..83612f5b64 --- a/builtin/blame.c +++ b/builtin/blame.c @@@ -6,7 -6,6 +6,7 @@@ */ #include "cache.h" +#include "refs.h" #include "builtin.h" #include "blob.h" #include "commit.h" @@@ -51,7 -50,7 +51,7 @@@ static int xdl_opts static int abbrev = -1; static int no_whole_file_rename; -static enum date_mode blame_date_mode = DATE_ISO8601; +static struct date_mode blame_date_mode = { DATE_ISO8601 }; static size_t blame_date_width; static struct string_list mailmap; @@@ -459,13 -458,12 +459,13 @@@ static void queue_blames(struct scorebo static struct origin *make_origin(struct commit *commit, const char *path) { struct origin *o; - o = xcalloc(1, sizeof(*o) + strlen(path) + 1); + size_t pathlen = strlen(path) + 1; + o = xcalloc(1, sizeof(*o) + pathlen); o->commit = commit; o->refcnt = 1; o->next = commit->util; commit->util = o; - strcpy(o->path, path); + memcpy(o->path, path, pathlen); /* includes NUL */ return o; } @@@ -975,10 -973,7 +975,10 @@@ static void pass_blame_to_parent(struc fill_origin_blob(&sb->revs->diffopt, target, &file_o); num_get_patch++; - diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d); + if (diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d)) + die("unable to generate diff (%s -> %s)", + sha1_to_hex(parent->commit->object.sha1), + sha1_to_hex(target->commit->object.sha1)); /* The rest are the same as the parent */ blame_chunk(&d.dstq, &d.srcq, INT_MAX, d.offset, INT_MAX, parent); *d.dstq = NULL; @@@ -1124,9 -1119,7 +1124,9 @@@ static void find_copy_in_blob(struct sc * file_p partially may match that image. */ memset(split, 0, sizeof(struct blame_entry [3])); - diff_hunks(file_p, &file_o, 1, handle_split_cb, &d); + if (diff_hunks(file_p, &file_o, 1, handle_split_cb, &d)) + die("unable to generate diff (%s)", + sha1_to_hex(parent->commit->object.sha1)); /* remainder, if any, all match the preimage */ handle_split(sb, ent, d.tlno, d.plno, ent->num_lines, parent, split); } @@@ -1841,7 -1834,7 +1841,7 @@@ static const char *format_time(unsigne size_t time_width; int tz; tz = atoi(tz_str); - time_str = show_date(time, tz, blame_date_mode); + time_str = show_date(time, tz, &blame_date_mode); strbuf_addstr(&time_buf, time_str); /* * Add space paddings to time_buf to display a fixed width @@@ -1880,9 -1873,9 +1880,9 @@@ static void emit_porcelain(struct score int cnt; const char *cp; struct origin *suspect = ent->suspect; - char hex[41]; + char hex[GIT_SHA1_HEXSZ + 1]; - strcpy(hex, sha1_to_hex(suspect->commit->object.sha1)); + sha1_to_hex_r(hex, suspect->commit->object.sha1); printf("%s %d %d %d\n", hex, ent->s_lno + 1, @@@ -1918,11 -1911,11 +1918,11 @@@ static void emit_other(struct scoreboar const char *cp; struct origin *suspect = ent->suspect; struct commit_info ci; - char hex[41]; + char hex[GIT_SHA1_HEXSZ + 1]; int show_raw_time = !!(opt & OUTPUT_RAW_TIMESTAMP); get_commit_info(suspect->commit, &ci, 1); - strcpy(hex, sha1_to_hex(suspect->commit->object.sha1)); + sha1_to_hex_r(hex, suspect->commit->object.sha1); cp = nth_line(sb, ent->lno); for (cnt = 0; cnt < ent->num_lines; cnt++) { @@@ -2201,7 -2194,7 +2201,7 @@@ static int git_blame_config(const char if (!strcmp(var, "blame.date")) { if (!value) return config_error_nonbool(var); - blame_date_mode = parse_date_format(value); + parse_date_format(value, &blame_date_mode); return 0; } @@@ -2240,19 -2233,20 +2240,19 @@@ static struct commit_list **append_pare static void append_merge_parents(struct commit_list **tail) { int merge_head; - const char *merge_head_file = git_path("MERGE_HEAD"); struct strbuf line = STRBUF_INIT; - merge_head = open(merge_head_file, O_RDONLY); + merge_head = open(git_path_merge_head(), O_RDONLY); if (merge_head < 0) { if (errno == ENOENT) return; - die("cannot open '%s' for reading", merge_head_file); + die("cannot open '%s' for reading", git_path_merge_head()); } while (!strbuf_getwholeline_fd(&line, merge_head, '\n')) { unsigned char sha1[20]; if (line.len < 40 || get_sha1_hex(line.buf, sha1)) - die("unknown line in '%s': %s", merge_head_file, line.buf); + die("unknown line in '%s': %s", git_path_merge_head(), line.buf); tail = append_parent(tail, sha1); } close(merge_head); @@@ -2402,16 -2396,11 +2402,11 @@@ static struct commit *fake_working_tree return commit; } - static char *prepare_final(struct scoreboard *sb) + static struct object_array_entry *find_single_final(struct rev_info *revs) { int i; - const char *final_commit_name = NULL; - struct rev_info *revs = sb->revs; + struct object_array_entry *found = NULL; - /* - * There must be one and only one positive commit in the - * revs->pending array. - */ for (i = 0; i < revs->pending.nr; i++) { struct object *obj = revs->pending.objects[i].item; if (obj->flags & UNINTERESTING) @@@ -2420,14 -2409,24 +2415,24 @@@ obj = deref_tag(obj, NULL, 0); if (obj->type != OBJ_COMMIT) die("Non commit %s?", revs->pending.objects[i].name); - if (sb->final) + if (found) die("More than one commit to dig from %s and %s?", revs->pending.objects[i].name, - final_commit_name); - sb->final = (struct commit *) obj; - final_commit_name = revs->pending.objects[i].name; + found->name); + found = &(revs->pending.objects[i]); + } + return found; + } + + static char *prepare_final(struct scoreboard *sb) + { + struct object_array_entry *found = find_single_final(sb->revs); + if (found) { + sb->final = (struct commit *) found->item; + return xstrdup(found->name); + } else { + return NULL; } - return xstrdup_or_null(final_commit_name); } static char *prepare_initial(struct scoreboard *sb) @@@ -2503,6 -2502,7 +2508,7 @@@ int cmd_blame(int argc, const char **ar long dashdash_pos, lno; char *final_commit_name = NULL; enum object_type type; + struct commit *final_commit = NULL; static struct string_list range_list; static int output_option = 0, opt = 0; @@@ -2582,13 -2582,13 +2588,13 @@@ parse_done if (cmd_is_annotate) { output_option |= OUTPUT_ANNOTATE_COMPAT; - blame_date_mode = DATE_ISO8601; + blame_date_mode.type = DATE_ISO8601; } else { blame_date_mode = revs.date_mode; } /* The maximum width used to show the dates */ - switch (blame_date_mode) { + switch (blame_date_mode.type) { case DATE_RFC2822: blame_date_width = sizeof("Thu, 19 Oct 2006 16:00:04 -0700"); break; @@@ -2613,12 -2613,10 +2619,12 @@@ fewer display columns. */ blame_date_width = utf8_strwidth(_("4 years, 11 months ago")) + 1; /* add the null */ break; - case DATE_LOCAL: case DATE_NORMAL: blame_date_width = sizeof("Thu Oct 19 16:00:04 2006 -0700"); break; + case DATE_STRFTIME: + blame_date_width = strlen(show_date(0, 0, &blame_date_mode)) + 1; /* add the null */ + break; } blame_date_width -= 1; /* strip the null */ @@@ -2691,12 -2689,12 +2697,12 @@@ sb.commits.compare = compare_commits_by_commit_date; } else if (contents_from) - die("--contents and --children do not blend well."); + die("--contents and --reverse do not blend well."); - else if (revs.first_parent_only) - die("combining --first-parent and --reverse is not supported"); else { final_commit_name = prepare_initial(&sb); sb.commits.compare = compare_commits_by_reverse_commit_date; + if (revs.first_parent_only) + revs.children.name = NULL; } if (!sb.final) { @@@ -2713,6 -2711,14 +2719,14 @@@ else if (contents_from) die("Cannot use --contents with final commit object name"); + if (reverse && revs.first_parent_only) { + struct object_array_entry *entry = find_single_final(sb.revs); + if (!entry) + die("--reverse and --first-parent together require specified latest commit"); + else + final_commit = (struct commit*) entry->item; + } + /* * If we have bottom, this will mark the ancestors of the * bottom commits we would reach while traversing as @@@ -2721,6 -2727,25 +2735,25 @@@ if (prepare_revision_walk(&revs)) die(_("revision walk setup failed")); + if (reverse && revs.first_parent_only) { + struct commit *c = final_commit; + + sb.revs->children.name = "children"; + while (c->parents && + hashcmp(c->object.sha1, sb.final->object.sha1)) { + struct commit_list *l = xcalloc(1, sizeof(*l)); + + l->item = c; + if (add_decoration(&sb.revs->children, + &c->parents->item->object, l)) + die("BUG: not unique item in first-parent chain"); + c = c->parents->item; + } + + if (hashcmp(c->object.sha1, sb.final->object.sha1)) + die("--reverse --first-parent together require range along first-parent chain"); + } + if (is_null_sha1(sb.final->object.sha1)) { o = sb.final->util; sb.final_buf = xmemdupz(o->file.ptr, o->file.size);