Merge branch 'jk/diff-graph-cleanup'
[git.git] / builtin / blame.c
index cfae5699051312943d90212fc9cbfda2aafb2288..86100e96627e4f839fb5b627bc09ed4264c36176 100644 (file)
@@ -42,6 +42,7 @@ static int blank_boundary;
 static int incremental;
 static int xdl_opts;
 static int abbrev = -1;
+static int no_whole_file_rename;
 
 static enum date_mode blame_date_mode = DATE_ISO8601;
 static size_t blame_date_width;
@@ -1226,7 +1227,7 @@ static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt)
         * The first pass looks for unrenamed path to optimize for
         * common cases, then we look for renames in the second pass.
         */
-       for (pass = 0; pass < 2; pass++) {
+       for (pass = 0; pass < 2 - no_whole_file_rename; pass++) {
                struct origin *(*find)(struct scoreboard *,
                                       struct commit *, struct origin *);
                find = pass ? find_rename : find_origin;
@@ -1321,30 +1322,31 @@ static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt)
  * Information on commits, used for output.
  */
 struct commit_info {
-       const char *author;
-       const char *author_mail;
+       struct strbuf author;
+       struct strbuf author_mail;
        unsigned long author_time;
-       const char *author_tz;
+       struct strbuf author_tz;
 
        /* filled only when asked for details */
-       const char *committer;
-       const char *committer_mail;
+       struct strbuf committer;
+       struct strbuf committer_mail;
        unsigned long committer_time;
-       const char *committer_tz;
+       struct strbuf committer_tz;
 
-       const char *summary;
+       struct strbuf summary;
 };
 
 /*
  * Parse author/committer line in the commit object buffer
  */
 static void get_ac_line(const char *inbuf, const char *what,
-                       int person_len, char *person,
-                       int mail_len, char *mail,
-                       unsigned long *time, const char **tz)
+       struct strbuf *name, struct strbuf *mail,
+       unsigned long *time, struct strbuf *tz)
 {
-       int len, tzlen, maillen;
-       char *tmp, *endp, *timepos, *mailpos;
+       struct ident_split ident;
+       size_t len, maillen, namelen;
+       char *tmp, *endp;
+       const char *namebuf, *mailbuf;
 
        tmp = strstr(inbuf, what);
        if (!tmp)
@@ -1355,69 +1357,61 @@ static void get_ac_line(const char *inbuf, const char *what,
                len = strlen(tmp);
        else
                len = endp - tmp;
-       if (person_len <= len) {
+
+       if (split_ident_line(&ident, tmp, len)) {
        error_out:
                /* Ugh */
-               *tz = "(unknown)";
-               strcpy(person, *tz);
-               strcpy(mail, *tz);
+               tmp = "(unknown)";
+               strbuf_addstr(name, tmp);
+               strbuf_addstr(mail, tmp);
+               strbuf_addstr(tz, tmp);
                *time = 0;
                return;
        }
-       memcpy(person, tmp, len);
-
-       tmp = person;
-       tmp += len;
-       *tmp = 0;
-       while (person < tmp && *tmp != ' ')
-               tmp--;
-       if (tmp <= person)
-               goto error_out;
-       *tz = tmp+1;
-       tzlen = (person+len)-(tmp+1);
 
-       *tmp = 0;
-       while (person < tmp && *tmp != ' ')
-               tmp--;
-       if (tmp <= person)
-               goto error_out;
-       *time = strtoul(tmp, NULL, 10);
-       timepos = tmp;
+       namelen = ident.name_end - ident.name_begin;
+       namebuf = ident.name_begin;
 
-       *tmp = 0;
-       while (person < tmp && !(*tmp == ' ' && tmp[1] == '<'))
-               tmp--;
-       if (tmp <= person)
-               return;
-       mailpos = tmp + 1;
-       *tmp = 0;
-       maillen = timepos - tmp;
-       memcpy(mail, mailpos, maillen);
+       maillen = ident.mail_end - ident.mail_begin;
+       mailbuf = ident.mail_begin;
 
-       if (!mailmap.nr)
-               return;
+       *time = strtoul(ident.date_begin, NULL, 10);
 
-       /*
-        * mailmap expansion may make the name longer.
-        * make room by pushing stuff down.
-        */
-       tmp = person + person_len - (tzlen + 1);
-       memmove(tmp, *tz, tzlen);
-       tmp[tzlen] = 0;
-       *tz = tmp;
+       len = ident.tz_end - ident.tz_begin;
+       strbuf_add(tz, ident.tz_begin, len);
 
        /*
         * Now, convert both name and e-mail using mailmap
         */
-       if (map_user(&mailmap, mail+1, mail_len-1, person, tmp-person-1)) {
-               /* Add a trailing '>' to email, since map_user returns plain emails
-                  Note: It already has '<', since we replace from mail+1 */
-               mailpos = memchr(mail, '\0', mail_len);
-               if (mailpos && mailpos-mail < mail_len - 1) {
-                       *mailpos = '>';
-                       *(mailpos+1) = '\0';
-               }
-       }
+       map_user(&mailmap, &mailbuf, &maillen,
+                &namebuf, &namelen);
+
+       strbuf_addf(mail, "<%.*s>", (int)maillen, mailbuf);
+       strbuf_add(name, namebuf, namelen);
+}
+
+static void commit_info_init(struct commit_info *ci)
+{
+
+       strbuf_init(&ci->author, 0);
+       strbuf_init(&ci->author_mail, 0);
+       strbuf_init(&ci->author_tz, 0);
+       strbuf_init(&ci->committer, 0);
+       strbuf_init(&ci->committer_mail, 0);
+       strbuf_init(&ci->committer_tz, 0);
+       strbuf_init(&ci->summary, 0);
+}
+
+static void commit_info_destroy(struct commit_info *ci)
+{
+
+       strbuf_release(&ci->author);
+       strbuf_release(&ci->author_mail);
+       strbuf_release(&ci->author_tz);
+       strbuf_release(&ci->committer);
+       strbuf_release(&ci->committer_mail);
+       strbuf_release(&ci->committer_tz);
+       strbuf_release(&ci->summary);
 }
 
 static void get_commit_info(struct commit *commit,
@@ -1426,57 +1420,32 @@ static void get_commit_info(struct commit *commit,
 {
        int len;
        const char *subject, *encoding;
-       char *reencoded, *message;
-       static char author_name[1024];
-       static char author_mail[1024];
-       static char committer_name[1024];
-       static char committer_mail[1024];
-       static char summary_buf[1024];
+       char *message;
+
+       commit_info_init(ret);
 
-       /*
-        * We've operated without save_commit_buffer, so
-        * we now need to populate them for output.
-        */
-       if (!commit->buffer) {
-               enum object_type type;
-               unsigned long size;
-               commit->buffer =
-                       read_sha1_file(commit->object.sha1, &type, &size);
-               if (!commit->buffer)
-                       die("Cannot read commit %s",
-                           sha1_to_hex(commit->object.sha1));
-       }
        encoding = get_log_output_encoding();
-       reencoded = logmsg_reencode(commit, encoding);
-       message   = reencoded ? reencoded : commit->buffer;
-       ret->author = author_name;
-       ret->author_mail = author_mail;
+       message = logmsg_reencode(commit, encoding);
        get_ac_line(message, "\nauthor ",
-                   sizeof(author_name), author_name,
-                   sizeof(author_mail), author_mail,
+                   &ret->author, &ret->author_mail,
                    &ret->author_time, &ret->author_tz);
 
        if (!detailed) {
-               free(reencoded);
+               logmsg_free(message, commit);
                return;
        }
 
-       ret->committer = committer_name;
-       ret->committer_mail = committer_mail;
        get_ac_line(message, "\ncommitter ",
-                   sizeof(committer_name), committer_name,
-                   sizeof(committer_mail), committer_mail,
+                   &ret->committer, &ret->committer_mail,
                    &ret->committer_time, &ret->committer_tz);
 
-       ret->summary = summary_buf;
        len = find_commit_subject(message, &subject);
-       if (len && len < sizeof(summary_buf)) {
-               memcpy(summary_buf, subject, len);
-               summary_buf[len] = 0;
-       } else {
-               sprintf(summary_buf, "(%s)", sha1_to_hex(commit->object.sha1));
-       }
-       free(reencoded);
+       if (len)
+               strbuf_add(&ret->summary, subject, len);
+       else
+               strbuf_addf(&ret->summary, "(%s)", sha1_to_hex(commit->object.sha1));
+
+       logmsg_free(message, commit);
 }
 
 /*
@@ -1504,15 +1473,15 @@ static int emit_one_suspect_detail(struct origin *suspect, int repeat)
 
        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 %s\n", ci.author.buf);
+       printf("author-mail %s\n", ci.author_mail.buf);
        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("author-tz %s\n", ci.author_tz.buf);
+       printf("committer %s\n", ci.committer.buf);
+       printf("committer-mail %s\n", ci.committer_mail.buf);
        printf("committer-time %lu\n", ci.committer_time);
-       printf("committer-tz %s\n", ci.committer_tz);
-       printf("summary %s\n", ci.summary);
+       printf("committer-tz %s\n", ci.committer_tz.buf);
+       printf("summary %s\n", ci.summary.buf);
        if (suspect->commit->object.flags & UNINTERESTING)
                printf("boundary\n");
        if (suspect->previous) {
@@ -1520,6 +1489,9 @@ static int emit_one_suspect_detail(struct origin *suspect, int repeat)
                printf("previous %s ", sha1_to_hex(prev->commit->object.sha1));
                write_name_quoted(prev->path, stdout, '\n');
        }
+
+       commit_info_destroy(&ci);
+
        return 1;
 }
 
@@ -1706,11 +1678,11 @@ static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
                if (opt & OUTPUT_ANNOTATE_COMPAT) {
                        const char *name;
                        if (opt & OUTPUT_SHOW_EMAIL)
-                               name = ci.author_mail;
+                               name = ci.author_mail.buf;
                        else
-                               name = ci.author;
+                               name = ci.author.buf;
                        printf("\t(%10s\t%10s\t%d)", name,
-                              format_time(ci.author_time, ci.author_tz,
+                              format_time(ci.author_time, ci.author_tz.buf,
                                           show_raw_time),
                               ent->lno + 1 + cnt);
                } else {
@@ -1729,14 +1701,14 @@ static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
                                const char *name;
                                int pad;
                                if (opt & OUTPUT_SHOW_EMAIL)
-                                       name = ci.author_mail;
+                                       name = ci.author_mail.buf;
                                else
-                                       name = ci.author;
+                                       name = ci.author.buf;
                                pad = longest_author - utf8_strwidth(name);
                                printf(" (%s%*s %10s",
                                       name, pad, "",
                                       format_time(ci.author_time,
-                                                  ci.author_tz,
+                                                  ci.author_tz.buf,
                                                   show_raw_time));
                        }
                        printf(" %*d) ",
@@ -1751,6 +1723,8 @@ static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
 
        if (sb->final_buf_size && cp[-1] != '\n')
                putchar('\n');
+
+       commit_info_destroy(&ci);
 }
 
 static void output(struct scoreboard *sb, int option)
@@ -1875,9 +1849,9 @@ static void find_alignment(struct scoreboard *sb, int *option)
                        suspect->commit->object.flags |= METAINFO_SHOWN;
                        get_commit_info(suspect->commit, &ci, 1);
                        if (*option & OUTPUT_SHOW_EMAIL)
-                               num = utf8_strwidth(ci.author_mail);
+                               num = utf8_strwidth(ci.author_mail.buf);
                        else
-                               num = utf8_strwidth(ci.author);
+                               num = utf8_strwidth(ci.author.buf);
                        if (longest_author < num)
                                longest_author = num;
                }
@@ -1889,6 +1863,8 @@ static void find_alignment(struct scoreboard *sb, int *option)
                        longest_dst_lines = num;
                if (largest_score < ent_score(sb, e))
                        largest_score = ent_score(sb, e);
+
+               commit_info_destroy(&ci);
        }
        max_orig_digits = decimal_width(longest_src_lines);
        max_digits = decimal_width(longest_dst_lines);
@@ -2403,6 +2379,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
        init_revisions(&revs, NULL);
        revs.date_mode = blame_date_mode;
        DIFF_OPT_SET(&revs.diffopt, ALLOW_TEXTCONV);
+       DIFF_OPT_SET(&revs.diffopt, FOLLOW_RENAMES);
 
        save_commit_buffer = 0;
        dashdash_pos = 0;
@@ -2426,6 +2403,8 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
                parse_revision_opt(&revs, &ctx, options, blame_opt_usage);
        }
 parse_done:
+       no_whole_file_rename = !DIFF_OPT_TST(&revs.diffopt, FOLLOW_RENAMES);
+       DIFF_OPT_CLR(&revs.diffopt, FOLLOW_RENAMES);
        argc = parse_options_end(&ctx);
 
        if (0 < abbrev)