blame: show "previous" information in --porcelain/--incremental format
[gitweb.git] / builtin-blame.c
index 4ea343189fdad035318e94ce0c6c2ec16b62ba7f..e386120596efb9f0fc9ed7e2c5bd2f05f3f1df5f 100644 (file)
@@ -38,7 +38,6 @@ static int show_root;
 static int reverse;
 static int blank_boundary;
 static int incremental;
-static int cmd_is_annotate;
 static int xdl_opts = XDF_NEED_MINIMAL;
 static struct string_list mailmap;
 
@@ -74,6 +73,7 @@ static unsigned blame_copy_score;
  */
 struct origin {
        int refcnt;
+       struct origin *previous;
        struct commit *commit;
        mmfile_t file;
        unsigned char blob_sha1[20];
@@ -115,6 +115,8 @@ static inline struct origin *origin_incref(struct origin *o)
 static void origin_decref(struct origin *o)
 {
        if (o && --o->refcnt <= 0) {
+               if (o->previous)
+                       origin_decref(o->previous);
                free(o->file.ptr);
                free(o);
        }
@@ -465,7 +467,6 @@ struct patch {
 };
 
 struct blame_diff_state {
-       struct xdiff_emit_state xm;
        struct patch *ret;
        unsigned hunk_post_context;
        unsigned hunk_in_pre_context : 1;
@@ -528,15 +529,12 @@ static struct patch *compare_buffer(mmfile_t *file_p, mmfile_t *file_o,
        xpp.flags = xdl_opts;
        memset(&xecfg, 0, sizeof(xecfg));
        xecfg.ctxlen = context;
-       ecb.outf = xdiff_outf;
-       ecb.priv = &state;
        memset(&state, 0, sizeof(state));
-       state.xm.consume = process_u_diff;
        state.ret = xmalloc(sizeof(struct patch));
        state.ret->chunks = NULL;
        state.ret->num = 0;
 
-       xdi_diff(file_p, file_o, &xpp, &xecfg, &ecb);
+       xdi_diff_outf(file_p, file_o, process_u_diff, &state, &xpp, &xecfg, &ecb);
 
        if (state.ret->num) {
                struct chunk *chunk;
@@ -1137,6 +1135,8 @@ static int find_copy_in_parent(struct scoreboard *sb,
 
                        if (!DIFF_FILE_VALID(p->one))
                                continue; /* does not exist in parent */
+                       if (S_ISGITLINK(p->one->mode))
+                               continue; /* ignore git links */
                        if (porigin && !strcmp(p->one->path, porigin->path))
                                /* find_move already dealt with this path */
                                continue;
@@ -1295,6 +1295,10 @@ static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt)
                struct origin *porigin = sg_origin[i];
                if (!porigin)
                        continue;
+               if (!origin->previous) {
+                       origin_incref(porigin);
+                       origin->previous = porigin;
+               }
                if (pass_blame_to_parent(sb, origin, porigin))
                        goto finish;
        }
@@ -1493,6 +1497,39 @@ static void write_filename_info(const char *path)
        write_name_quoted(path, stdout, '\n');
 }
 
+/*
+ * Porcelain/Incremental format wants to show a lot of details per
+ * commit.  Instead of repeating this every line, emit it only once,
+ * the first time each commit appears in the output.
+ */
+static int emit_one_suspect_detail(struct origin *suspect)
+{
+       struct commit_info ci;
+
+       if (suspect->commit->object.flags & METAINFO_SHOWN)
+               return 0;
+
+       suspect->commit->object.flags |= METAINFO_SHOWN;
+       get_commit_info(suspect->commit, &ci, 1);
+       printf("author %s\n", ci.author);
+       printf("author-mail %s\n", ci.author_mail);
+       printf("author-time %lu\n", ci.author_time);
+       printf("author-tz %s\n", ci.author_tz);
+       printf("committer %s\n", ci.committer);
+       printf("committer-mail %s\n", ci.committer_mail);
+       printf("committer-time %lu\n", ci.committer_time);
+       printf("committer-tz %s\n", ci.committer_tz);
+       printf("summary %s\n", ci.summary);
+       if (suspect->commit->object.flags & UNINTERESTING)
+               printf("boundary\n");
+       if (suspect->previous) {
+               struct origin *prev = suspect->previous;
+               printf("previous %s ", sha1_to_hex(prev->commit->object.sha1));
+               write_name_quoted(prev->path, stdout, '\n');
+       }
+       return 1;
+}
+
 /*
  * The blame_entry is found to be guilty for the range.  Mark it
  * as such, and show it in incremental output.
@@ -1508,22 +1545,7 @@ static void found_guilty_entry(struct blame_entry *ent)
                printf("%s %d %d %d\n",
                       sha1_to_hex(suspect->commit->object.sha1),
                       ent->s_lno + 1, ent->lno + 1, ent->num_lines);
-               if (!(suspect->commit->object.flags & METAINFO_SHOWN)) {
-                       struct commit_info ci;
-                       suspect->commit->object.flags |= METAINFO_SHOWN;
-                       get_commit_info(suspect->commit, &ci, 1);
-                       printf("author %s\n", ci.author);
-                       printf("author-mail %s\n", ci.author_mail);
-                       printf("author-time %lu\n", ci.author_time);
-                       printf("author-tz %s\n", ci.author_tz);
-                       printf("committer %s\n", ci.committer);
-                       printf("committer-mail %s\n", ci.committer_mail);
-                       printf("committer-time %lu\n", ci.committer_time);
-                       printf("committer-tz %s\n", ci.committer_tz);
-                       printf("summary %s\n", ci.summary);
-                       if (suspect->commit->object.flags & UNINTERESTING)
-                               printf("boundary\n");
-               }
+               emit_one_suspect_detail(suspect);
                write_filename_info(suspect->path);
                maybe_flush_or_die(stdout, "stdout");
        }
@@ -1630,24 +1652,8 @@ static void emit_porcelain(struct scoreboard *sb, struct blame_entry *ent)
               ent->s_lno + 1,
               ent->lno + 1,
               ent->num_lines);
-       if (!(suspect->commit->object.flags & METAINFO_SHOWN)) {
-               struct commit_info ci;
-               suspect->commit->object.flags |= METAINFO_SHOWN;
-               get_commit_info(suspect->commit, &ci, 1);
-               printf("author %s\n", ci.author);
-               printf("author-mail %s\n", ci.author_mail);
-               printf("author-time %lu\n", ci.author_time);
-               printf("author-tz %s\n", ci.author_tz);
-               printf("committer %s\n", ci.committer);
-               printf("committer-mail %s\n", ci.committer_mail);
-               printf("committer-time %lu\n", ci.committer_time);
-               printf("committer-tz %s\n", ci.committer_tz);
-               write_filename_info(suspect->path);
-               printf("summary %s\n", ci.summary);
-               if (suspect->commit->object.flags & UNINTERESTING)
-                       printf("boundary\n");
-       }
-       else if (suspect->commit->object.flags & MORE_THAN_ONE_PATH)
+       if (emit_one_suspect_detail(suspect) ||
+           (suspect->commit->object.flags & MORE_THAN_ONE_PATH))
                write_filename_info(suspect->path);
 
        cp = nth_line(sb, ent->lno);
@@ -1686,7 +1692,7 @@ static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
                if (suspect->commit->object.flags & UNINTERESTING) {
                        if (blank_boundary)
                                memset(hex, ' ', length);
-                       else if (!cmd_is_annotate) {
+                       else if (!(opt & OUTPUT_ANNOTATE_COMPAT)) {
                                length--;
                                putchar('^');
                        }
@@ -1791,7 +1797,7 @@ static int prepare_lines(struct scoreboard *sb)
 
 /*
  * Add phony grafts for use with -S; this is primarily to
- * support git-cvsserver that wants to give a linear history
+ * support git's cvsserver that wants to give a linear history
  * to its clients.
  */
 static int read_ancestry(const char *graft_file)
@@ -1884,36 +1890,6 @@ static void sanity_check_refcnt(struct scoreboard *sb)
                        baa = 1;
                }
        }
-       for (ent = sb->ent; ent; ent = ent->next) {
-               /* Mark the ones that haven't been checked */
-               if (0 < ent->suspect->refcnt)
-                       ent->suspect->refcnt = -ent->suspect->refcnt;
-       }
-       for (ent = sb->ent; ent; ent = ent->next) {
-               /*
-                * ... then pick each and see if they have the the
-                * correct refcnt.
-                */
-               int found;
-               struct blame_entry *e;
-               struct origin *suspect = ent->suspect;
-
-               if (0 < suspect->refcnt)
-                       continue;
-               suspect->refcnt = -suspect->refcnt; /* Unmark */
-               for (found = 0, e = sb->ent; e; e = e->next) {
-                       if (e->suspect != suspect)
-                               continue;
-                       found++;
-               }
-               if (suspect->refcnt != found) {
-                       fprintf(stderr, "%s in %s has refcnt %d, not %d\n",
-                               ent->suspect->path,
-                               sha1_to_hex(ent->suspect->commit->object.sha1),
-                               ent->suspect->refcnt, found);
-                       baa = 2;
-               }
-       }
        if (baa) {
                int opt = 0160;
                find_alignment(sb, &opt);
@@ -2065,7 +2041,7 @@ static struct commit *fake_working_tree_commit(const char *path, const char *con
        struct commit *commit;
        struct origin *origin;
        unsigned char head_sha1[20];
-       struct strbuf buf;
+       struct strbuf buf = STRBUF_INIT;
        const char *ident;
        time_t now;
        int size, len;
@@ -2085,7 +2061,6 @@ static struct commit *fake_working_tree_commit(const char *path, const char *con
 
        origin = make_origin(commit, path);
 
-       strbuf_init(&buf, 0);
        if (!contents_from || strcmp("-", contents_from)) {
                struct stat st;
                const char *read_from;
@@ -2317,8 +2292,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
        };
 
        struct parse_opt_ctx_t ctx;
-
-       cmd_is_annotate = !strcmp(argv[0], "annotate");
+       int cmd_is_annotate = !strcmp(argv[0], "annotate");
 
        git_config(git_blame_config, NULL);
        init_revisions(&revs, NULL);
@@ -2346,6 +2320,9 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 parse_done:
        argc = parse_options_end(&ctx);
 
+       if (cmd_is_annotate)
+               output_option |= OUTPUT_ANNOTATE_COMPAT;
+
        if (DIFF_OPT_TST(&revs.diffopt, FIND_COPIES_HARDER))
                opt |= (PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE |
                        PICKAXE_BLAME_COPY_HARDER);