Merge branch 'jc/fake-ancestor-with-non-blobs'
[gitweb.git] / pretty.c
index 91bb2d3ef675b12ac5425ae71600e13c1adc34f9..eae57ad9d7f3b06a5a76f9d934825f9824def477 100644 (file)
--- a/pretty.c
+++ b/pretty.c
@@ -387,56 +387,79 @@ void pp_user_info(const struct pretty_print_context *pp,
                  const char *what, struct strbuf *sb,
                  const char *line, const char *encoding)
 {
+       struct strbuf name;
+       struct strbuf mail;
+       struct ident_split ident;
+       int linelen;
+       char *line_end, *date;
+       const char *mailbuf, *namebuf;
+       size_t namelen, maillen;
        int max_length = 78; /* per rfc2822 */
-       char *date;
-       int namelen;
        unsigned long time;
        int tz;
 
        if (pp->fmt == CMIT_FMT_ONELINE)
                return;
-       date = strchr(line, '>');
-       if (!date)
+
+       line_end = strchr(line, '\n');
+       if (!line_end) {
+               line_end = strchr(line, '\0');
+               if (!line_end)
+                       return;
+       }
+
+       linelen = ++line_end - line;
+       if (split_ident_line(&ident, line, linelen))
                return;
-       namelen = ++date - line;
-       time = strtoul(date, &date, 10);
+
+
+       mailbuf = ident.mail_begin;
+       maillen = ident.mail_end - ident.mail_begin;
+       namebuf = ident.name_begin;
+       namelen = ident.name_end - ident.name_begin;
+
+       if (pp->mailmap)
+               map_user(pp->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
+
+       strbuf_init(&mail, 0);
+       strbuf_init(&name, 0);
+
+       strbuf_add(&mail, mailbuf, maillen);
+       strbuf_add(&name, namebuf, namelen);
+
+       namelen = name.len + mail.len + 3; /* ' ' + '<' + '>' */
+       time = strtoul(ident.date_begin, &date, 10);
        tz = strtol(date, NULL, 10);
 
        if (pp->fmt == CMIT_FMT_EMAIL) {
-               char *name_tail = strchr(line, '<');
-               int display_name_length;
-               if (!name_tail)
-                       return;
-               while (line < name_tail && isspace(name_tail[-1]))
-                       name_tail--;
-               display_name_length = name_tail - line;
                strbuf_addstr(sb, "From: ");
-               if (needs_rfc2047_encoding(line, display_name_length, RFC2047_ADDRESS)) {
-                       add_rfc2047(sb, line, display_name_length,
-                                               encoding, RFC2047_ADDRESS);
+               if (needs_rfc2047_encoding(name.buf, name.len, RFC2047_ADDRESS)) {
+                       add_rfc2047(sb, name.buf, name.len,
+                                   encoding, RFC2047_ADDRESS);
                        max_length = 76; /* per rfc2047 */
-               } else if (needs_rfc822_quoting(line, display_name_length)) {
+               } else if (needs_rfc822_quoting(name.buf, name.len)) {
                        struct strbuf quoted = STRBUF_INIT;
-                       add_rfc822_quoted(&quoted, line, display_name_length);
+                       add_rfc822_quoted(&quoted, name.buf, name.len);
                        strbuf_add_wrapped_bytes(sb, quoted.buf, quoted.len,
                                                        -6, 1, max_length);
                        strbuf_release(&quoted);
                } else {
-                       strbuf_add_wrapped_bytes(sb, line, display_name_length,
-                                                       -6, 1, max_length);
+                       strbuf_add_wrapped_bytes(sb, name.buf, name.len,
+                                                -6, 1, max_length);
                }
-               if (namelen - display_name_length + last_line_length(sb) > max_length) {
+               if (namelen - name.len + last_line_length(sb) > max_length)
                        strbuf_addch(sb, '\n');
-                       if (!isspace(name_tail[0]))
-                               strbuf_addch(sb, ' ');
-               }
-               strbuf_add(sb, name_tail, namelen - display_name_length);
-               strbuf_addch(sb, '\n');
+
+               strbuf_addf(sb, " <%s>\n", mail.buf);
        } else {
-               strbuf_addf(sb, "%s: %.*s%.*s\n", what,
+               strbuf_addf(sb, "%s: %.*s%s <%s>\n", what,
                              (pp->fmt == CMIT_FMT_FULLER) ? 4 : 0,
-                             "    ", namelen, line);
+                             "    ", name.buf, mail.buf);
        }
+
+       strbuf_release(&mail);
+       strbuf_release(&name);
+
        switch (pp->fmt) {
        case CMIT_FMT_MEDIUM:
                strbuf_addf(sb, "Date:   %s\n", show_date(time, tz, pp->date_mode));
@@ -501,10 +524,11 @@ static void add_merge_info(const struct pretty_print_context *pp,
        strbuf_addch(sb, '\n');
 }
 
-static char *get_header(const struct commit *commit, const char *key)
+static char *get_header(const struct commit *commit, const char *msg,
+                       const char *key)
 {
        int key_len = strlen(key);
-       const char *line = commit->buffer;
+       const char *line = msg;
 
        while (line) {
                const char *eol = strchr(line, '\n'), *next;
@@ -565,28 +589,81 @@ char *logmsg_reencode(const struct commit *commit,
        static const char *utf8 = "UTF-8";
        const char *use_encoding;
        char *encoding;
+       char *msg = commit->buffer;
        char *out;
 
+       if (!msg) {
+               enum object_type type;
+               unsigned long size;
+
+               msg = read_sha1_file(commit->object.sha1, &type, &size);
+               if (!msg)
+                       die("Cannot read commit object %s",
+                           sha1_to_hex(commit->object.sha1));
+               if (type != OBJ_COMMIT)
+                       die("Expected commit for '%s', got %s",
+                           sha1_to_hex(commit->object.sha1), typename(type));
+       }
+
        if (!output_encoding || !*output_encoding)
-               return NULL;
-       encoding = get_header(commit, "encoding");
+               return msg;
+       encoding = get_header(commit, msg, "encoding");
        use_encoding = encoding ? encoding : utf8;
-       if (same_encoding(use_encoding, output_encoding))
-               if (encoding) /* we'll strip encoding header later */
-                       out = xstrdup(commit->buffer);
-               else
-                       return NULL; /* nothing to do */
-       else
-               out = reencode_string(commit->buffer,
-                                     output_encoding, use_encoding);
+       if (same_encoding(use_encoding, output_encoding)) {
+               /*
+                * No encoding work to be done. If we have no encoding header
+                * at all, then there's nothing to do, and we can return the
+                * message verbatim (whether newly allocated or not).
+                */
+               if (!encoding)
+                       return msg;
+
+               /*
+                * Otherwise, we still want to munge the encoding header in the
+                * result, which will be done by modifying the buffer. If we
+                * are using a fresh copy, we can reuse it. But if we are using
+                * the cached copy from commit->buffer, we need to duplicate it
+                * to avoid munging commit->buffer.
+                */
+               out = msg;
+               if (out == commit->buffer)
+                       out = xstrdup(out);
+       }
+       else {
+               /*
+                * There's actual encoding work to do. Do the reencoding, which
+                * still leaves the header to be replaced in the next step. At
+                * this point, we are done with msg. If we allocated a fresh
+                * copy, we can free it.
+                */
+               out = reencode_string(msg, output_encoding, use_encoding);
+               if (out && msg != commit->buffer)
+                       free(msg);
+       }
+
+       /*
+        * This replacement actually consumes the buffer we hand it, so we do
+        * not have to worry about freeing the old "out" here.
+        */
        if (out)
                out = replace_encoding_header(out, output_encoding);
 
        free(encoding);
-       return out;
+       /*
+        * If the re-encoding failed, out might be NULL here; in that
+        * case we just return the commit message verbatim.
+        */
+       return out ? out : msg;
+}
+
+void logmsg_free(char *msg, const struct commit *commit)
+{
+       if (msg != commit->buffer)
+               free(msg);
 }
 
-static int mailmap_name(char *email, int email_len, char *name, int name_len)
+static int mailmap_name(const char **email, size_t *email_len,
+                       const char **name, size_t *name_len)
 {
        static struct string_list *mail_map;
        if (!mail_map) {
@@ -603,36 +680,26 @@ static size_t format_person_part(struct strbuf *sb, char part,
        const int placeholder_len = 2;
        int tz;
        unsigned long date = 0;
-       char person_name[1024];
-       char person_mail[1024];
        struct ident_split s;
-       const char *name_start, *name_end, *mail_start, *mail_end;
+       const char *name, *mail;
+       size_t maillen, namelen;
 
        if (split_ident_line(&s, msg, len) < 0)
                goto skip;
 
-       name_start = s.name_begin;
-       name_end = s.name_end;
-       mail_start = s.mail_begin;
-       mail_end = s.mail_end;
-
-       if (part == 'N' || part == 'E') { /* mailmap lookup */
-               snprintf(person_name, sizeof(person_name), "%.*s",
-                        (int)(name_end - name_start), name_start);
-               snprintf(person_mail, sizeof(person_mail), "%.*s",
-                        (int)(mail_end - mail_start), mail_start);
-               mailmap_name(person_mail, sizeof(person_mail), person_name, sizeof(person_name));
-               name_start = person_name;
-               name_end = name_start + strlen(person_name);
-               mail_start = person_mail;
-               mail_end = mail_start +  strlen(person_mail);
-       }
+       name = s.name_begin;
+       namelen = s.name_end - s.name_begin;
+       mail = s.mail_begin;
+       maillen = s.mail_end - s.mail_begin;
+
+       if (part == 'N' || part == 'E') /* mailmap lookup */
+               mailmap_name(&mail, &maillen, &name, &namelen);
        if (part == 'n' || part == 'N') {       /* name */
-               strbuf_add(sb, name_start, name_end-name_start);
+               strbuf_add(sb, name, namelen);
                return placeholder_len;
        }
        if (part == 'e' || part == 'E') {       /* email */
-               strbuf_add(sb, mail_start, mail_end-mail_start);
+               strbuf_add(sb, mail, maillen);
                return placeholder_len;
        }
 
@@ -960,12 +1027,19 @@ static size_t format_commit_one(struct strbuf *sb, const char *placeholder,
        switch (placeholder[0]) {
        case 'C':
                if (placeholder[1] == '(') {
-                       const char *end = strchr(placeholder + 2, ')');
+                       const char *begin = placeholder + 2;
+                       const char *end = strchr(begin, ')');
                        char color[COLOR_MAXLEN];
+
                        if (!end)
                                return 0;
-                       color_parse_mem(placeholder + 2,
-                                       end - (placeholder + 2),
+                       if (!prefixcmp(begin, "auto,")) {
+                               if (!want_color(c->pretty_ctx->color))
+                                       return end - placeholder + 1;
+                               begin += 5;
+                       }
+                       color_parse_mem(begin,
+                                       end - begin,
                                        "--pretty format", color);
                        strbuf_addstr(sb, color);
                        return end - placeholder + 1;
@@ -1257,14 +1331,11 @@ void format_commit_message(const struct commit *commit,
        context.pretty_ctx = pretty_ctx;
        context.wrap_start = sb->len;
        context.message = logmsg_reencode(commit, output_enc);
-       if (!context.message)
-               context.message = commit->buffer;
 
        strbuf_expand(sb, format, format_commit_item, &context);
        rewrap_message_tail(sb, &context, 0, 0, 0);
 
-       if (context.message != commit->buffer)
-               free(context.message);
+       logmsg_free(context.message, commit);
        free(context.signature.gpg_output);
        free(context.signature.signer);
 }
@@ -1294,7 +1365,7 @@ static void pp_header(const struct pretty_print_context *pp,
                        continue;
                }
 
-               if (!memcmp(line, "parent ", 7)) {
+               if (!prefixcmp(line, "parent ")) {
                        if (linelen != 48)
                                die("bad parent line in commit");
                        continue;
@@ -1318,11 +1389,11 @@ static void pp_header(const struct pretty_print_context *pp,
                 * FULL shows both authors but not dates.
                 * FULLER shows both authors and dates.
                 */
-               if (!memcmp(line, "author ", 7)) {
+               if (!prefixcmp(line, "author ")) {
                        strbuf_grow(sb, linelen + 80);
                        pp_user_info(pp, "Author", sb, line + 7, encoding);
                }
-               if (!memcmp(line, "committer ", 10) &&
+               if (!prefixcmp(line, "committer ") &&
                    (pp->fmt == CMIT_FMT_FULL || pp->fmt == CMIT_FMT_FULLER)) {
                        strbuf_grow(sb, linelen + 80);
                        pp_user_info(pp, "Commit", sb, line + 10, encoding);
@@ -1411,7 +1482,7 @@ void pretty_print_commit(const struct pretty_print_context *pp,
 {
        unsigned long beginning_of_body;
        int indent = 4;
-       const char *msg = commit->buffer;
+       const char *msg;
        char *reencoded;
        const char *encoding;
        int need_8bit_cte = pp->need_8bit_cte;
@@ -1422,10 +1493,7 @@ void pretty_print_commit(const struct pretty_print_context *pp,
        }
 
        encoding = get_log_output_encoding();
-       reencoded = logmsg_reencode(commit, encoding);
-       if (reencoded) {
-               msg = reencoded;
-       }
+       msg = reencoded = logmsg_reencode(commit, encoding);
 
        if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
                indent = 0;
@@ -1482,7 +1550,7 @@ void pretty_print_commit(const struct pretty_print_context *pp,
        if (pp->fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
                strbuf_addch(sb, '\n');
 
-       free(reencoded);
+       logmsg_free(reencoded, commit);
 }
 
 void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,