1 files changed, 135 insertions, 41 deletions

diff --git a/pretty.c b/pretty.c
index 92b2870..25efbca 100644
--- a/pretty.c
+++ b/pretty.c
@@ -16,6 +16,7 @@ static struct cmt_fmt_map {
 	const char *name;
 	enum cmit_fmt format;
 	int is_tformat;
+	int expand_tabs_in_log;
 	int is_alias;
 	const char *user_format;
 } *commit_formats;
@@ -87,13 +88,14 @@ static int git_pretty_formats_config(const char *var, const char *value, void *c
 static void setup_commit_formats(void)
 {
 	struct cmt_fmt_map builtin_formats[] = {
-		{ "raw",	CMIT_FMT_RAW,		0 },
-		{ "medium",	CMIT_FMT_MEDIUM,	0 },
-		{ "short",	CMIT_FMT_SHORT,		0 },
-		{ "email",	CMIT_FMT_EMAIL,		0 },
-		{ "fuller",	CMIT_FMT_FULLER,	0 },
-		{ "full",	CMIT_FMT_FULL,		0 },
-		{ "oneline",	CMIT_FMT_ONELINE,	1 }
+		{ "raw",	CMIT_FMT_RAW,		0,	0 },
+		{ "medium",	CMIT_FMT_MEDIUM,	0,	8 },
+		{ "short",	CMIT_FMT_SHORT,		0,	0 },
+		{ "email",	CMIT_FMT_EMAIL,		0,	0 },
+		{ "mboxrd",	CMIT_FMT_MBOXRD,	0,	0 },
+		{ "fuller",	CMIT_FMT_FULLER,	0,	8 },
+		{ "full",	CMIT_FMT_FULL,		0,	8 },
+		{ "oneline",	CMIT_FMT_ONELINE,	1,	0 }
 	};
 	commit_formats_len = ARRAY_SIZE(builtin_formats);
 	builtin_formats_len = commit_formats_len;
@@ -172,6 +174,7 @@ void get_commit_format(const char *arg, struct rev_info *rev)
 
 	rev->commit_format = commit_format->format;
 	rev->use_terminator = commit_format->is_tformat;
+	rev->expand_tabs_in_log_default = commit_format->expand_tabs_in_log;
 	if (commit_format->format == CMIT_FMT_USERFORMAT) {
 		save_user_format(rev, commit_format->user_format,
 				 commit_format->is_tformat);
@@ -442,7 +445,7 @@ void pp_user_info(struct pretty_print_context *pp,
 	if (pp->mailmap)
 		map_user(pp->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
 
-	if (pp->fmt == CMIT_FMT_EMAIL) {
+	if (cmit_fmt_is_mail(pp->fmt)) {
 		if (pp->from_ident && ident_cmp(pp->from_ident, &ident)) {
 			struct strbuf buf = STRBUF_INIT;
 
@@ -492,6 +495,7 @@ void pp_user_info(struct pretty_print_context *pp,
 			    show_ident_date(&ident, &pp->date_mode));
 		break;
 	case CMIT_FMT_EMAIL:
+	case CMIT_FMT_MBOXRD:
 		strbuf_addf(sb, "Date: %s\n",
 			    show_ident_date(&ident, DATE_MODE(RFC2822)));
 		break;
@@ -505,7 +509,7 @@ void pp_user_info(struct pretty_print_context *pp,
 	}
 }
 
-static int is_empty_line(const char *line, int *len_p)
+static int is_blank_line(const char *line, int *len_p)
 {
 	int len = *len_p;
 	while (len && isspace(line[len - 1]))
@@ -514,14 +518,14 @@ static int is_empty_line(const char *line, int *len_p)
 	return !len;
 }
 
-static const char *skip_empty_lines(const char *msg)
+const char *skip_blank_lines(const char *msg)
 {
 	for (;;) {
 		int linelen = get_one_line(msg);
 		int ll = linelen;
 		if (!linelen)
 			break;
-		if (!is_empty_line(msg, &ll))
+		if (!is_blank_line(msg, &ll))
 			break;
 		msg += linelen;
 	}
@@ -533,7 +537,7 @@ static void add_merge_info(const struct pretty_print_context *pp,
 {
 	struct commit_list *parent = commit->parents;
 
-	if ((pp->fmt == CMIT_FMT_ONELINE) || (pp->fmt == CMIT_FMT_EMAIL) ||
+	if ((pp->fmt == CMIT_FMT_ONELINE) || (cmit_fmt_is_mail(pp->fmt)) ||
 	    !parent || !parent->next)
 		return;
 
@@ -873,7 +877,7 @@ const char *format_subject(struct strbuf *sb, const char *msg,
 		int linelen = get_one_line(line);
 
 		msg += linelen;
-		if (!linelen || is_empty_line(line, &linelen))
+		if (!linelen || is_blank_line(line, &linelen))
 			break;
 
 		if (!sb)
@@ -892,11 +896,11 @@ static void parse_commit_message(struct format_commit_context *c)
 	const char *msg = c->message + c->message_off;
 	const char *start = c->message;
 
-	msg = skip_empty_lines(msg);
+	msg = skip_blank_lines(msg);
 	c->subject_off = msg - start;
 
 	msg = format_subject(NULL, msg, NULL);
-	msg = skip_empty_lines(msg);
+	msg = skip_blank_lines(msg);
 	c->body_off = msg - start;
 
 	c->commit_message_parsed = 1;
@@ -1020,9 +1024,15 @@ static size_t parse_padding_placeholder(struct strbuf *sb,
 		int width;
 		if (!end || end == start)
 			return 0;
-		width = strtoul(start, &next, 10);
+		width = strtol(start, &next, 10);
 		if (next == start || width == 0)
 			return 0;
+		if (width < 0) {
+			if (to_column)
+				width += term_columns();
+			if (width < 0)
+				return 0;
+		}
 		c->padding = to_column ? -width : width;
 		c->flush_type = flush_type;
 
@@ -1055,13 +1065,15 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 	const struct commit *commit = c->commit;
 	const char *msg = c->message;
 	struct commit_list *p;
-	int h1, h2;
+	int ch;
 
 	/* these are independent of the commit */
 	switch (placeholder[0]) {
 	case 'C':
 		if (starts_with(placeholder + 1, "(auto)")) {
-			c->auto_color = 1;
+			c->auto_color = want_color(c->pretty_ctx->color);
+			if (c->auto_color && sb->len)
+				strbuf_addstr(sb, GIT_COLOR_RESET);
 			return 7; /* consumed 7 bytes, "C(auto)" */
 		} else {
 			int ret = parse_color(sb, placeholder, c);
@@ -1079,14 +1091,11 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 		return 1;
 	case 'x':
 		/* %x00 == NUL, %x0a == LF, etc. */
-		if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
-		    h1 <= 16 &&
-		    0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
-		    h2 <= 16) {
-			strbuf_addch(sb, (h1<<4)|h2);
-			return 3;
-		} else
+		ch = hex2chr(placeholder + 1);
+		if (ch < 0)
 			return 0;
+		strbuf_addch(sb, ch);
+		return 3;
 	case 'w':
 		if (placeholder[1] == '(') {
 			unsigned long width = 0, indent1 = 0, indent2 = 0;
@@ -1133,8 +1142,8 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 			strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
 			return 1;
 		}
-		strbuf_addstr(sb, find_unique_abbrev(commit->object.oid.hash,
-						     c->pretty_ctx->abbrev));
+		strbuf_add_unique_abbrev(sb, commit->object.oid.hash,
+					 c->pretty_ctx->abbrev);
 		strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
 		c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
 		return 1;
@@ -1144,8 +1153,8 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 	case 't':		/* abbreviated tree hash */
 		if (add_again(sb, &c->abbrev_tree_hash))
 			return 1;
-		strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.oid.hash,
-						     c->pretty_ctx->abbrev));
+		strbuf_add_unique_abbrev(sb, commit->tree->object.oid.hash,
+					 c->pretty_ctx->abbrev);
 		c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
 		return 1;
 	case 'P':		/* parent hashes */
@@ -1161,9 +1170,8 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 		for (p = commit->parents; p; p = p->next) {
 			if (p != commit->parents)
 				strbuf_addch(sb, ' ');
-			strbuf_addstr(sb, find_unique_abbrev(
-					p->item->object.oid.hash,
-					c->pretty_ctx->abbrev));
+			strbuf_add_unique_abbrev(sb, p->item->object.oid.hash,
+						 c->pretty_ctx->abbrev);
 		}
 		c->abbrev_parent_hashes.len = sb->len -
 		                              c->abbrev_parent_hashes.off;
@@ -1297,6 +1305,7 @@ static size_t format_and_pad_commit(struct strbuf *sb, /* in UTF-8 */
 		if (!start)
 			start = sb->buf;
 		occupied = utf8_strnwidth(start, -1, 1);
+		occupied += c->pretty_ctx->graph_width;
 		padding = (-padding) - occupied;
 	}
 	while (1) {
@@ -1612,7 +1621,7 @@ void pp_title_line(struct pretty_print_context *pp,
 	if (pp->after_subject) {
 		strbuf_addstr(sb, pp->after_subject);
 	}
-	if (pp->fmt == CMIT_FMT_EMAIL) {
+	if (cmit_fmt_is_mail(pp->fmt)) {
 		strbuf_addch(sb, '\n');
 	}
 
@@ -1629,6 +1638,82 @@ void pp_title_line(struct pretty_print_context *pp,
 	strbuf_release(&title);
 }
 
+static int pp_utf8_width(const char *start, const char *end)
+{
+	int width = 0;
+	size_t remain = end - start;
+
+	while (remain) {
+		int n = utf8_width(&start, &remain);
+		if (n < 0 || !start)
+			return -1;
+		width += n;
+	}
+	return width;
+}
+
+static void strbuf_add_tabexpand(struct strbuf *sb, int tabwidth,
+				 const char *line, int linelen)
+{
+	const char *tab;
+
+	while ((tab = memchr(line, '\t', linelen)) != NULL) {
+		int width = pp_utf8_width(line, tab);
+
+		/*
+		 * If it wasn't well-formed utf8, or it
+		 * had characters with badly defined
+		 * width (control characters etc), just
+		 * give up on trying to align things.
+		 */
+		if (width < 0)
+			break;
+
+		/* Output the data .. */
+		strbuf_add(sb, line, tab - line);
+
+		/* .. and the de-tabified tab */
+		strbuf_addchars(sb, ' ', tabwidth - (width % tabwidth));
+
+		/* Skip over the printed part .. */
+		linelen -= tab + 1 - line;
+		line = tab + 1;
+	}
+
+	/*
+	 * Print out everything after the last tab without
+	 * worrying about width - there's nothing more to
+	 * align.
+	 */
+	strbuf_add(sb, line, linelen);
+}
+
+/*
+ * pp_handle_indent() prints out the intendation, and
+ * the whole line (without the final newline), after
+ * de-tabifying.
+ */
+static void pp_handle_indent(struct pretty_print_context *pp,
+			     struct strbuf *sb, int indent,
+			     const char *line, int linelen)
+{
+	strbuf_addchars(sb, ' ', indent);
+	if (pp->expand_tabs_in_log)
+		strbuf_add_tabexpand(sb, pp->expand_tabs_in_log, line, linelen);
+	else
+		strbuf_add(sb, line, linelen);
+}
+
+static int is_mboxrd_from(const char *line, int len)
+{
+	/*
+	 * a line matching /^From $/ here would only have len == 4
+	 * at this point because is_empty_line would've trimmed all
+	 * trailing space
+	 */
+	return len > 4 && starts_with(line + strspn(line, ">"), "From ");
+}
+
 void pp_remainder(struct pretty_print_context *pp,
 		  const char **msg_p,
 		  struct strbuf *sb,
@@ -1643,7 +1728,7 @@ void pp_remainder(struct pretty_print_context *pp,
 		if (!linelen)
 			break;
 
-		if (is_empty_line(line, &linelen)) {
+		if (is_blank_line(line, &linelen)) {
 			if (first)
 				continue;
 			if (pp->fmt == CMIT_FMT_SHORT)
@@ -1653,8 +1738,17 @@ void pp_remainder(struct pretty_print_context *pp,
 
 		strbuf_grow(sb, linelen + indent + 20);
 		if (indent)
-			strbuf_addchars(sb, ' ', indent);
-		strbuf_add(sb, line, linelen);
+			pp_handle_indent(pp, sb, indent, line, linelen);
+		else if (pp->expand_tabs_in_log)
+			strbuf_add_tabexpand(sb, pp->expand_tabs_in_log,
+					     line, linelen);
+		else {
+			if (pp->fmt == CMIT_FMT_MBOXRD &&
+					is_mboxrd_from(line, linelen))
+				strbuf_addch(sb, '>');
+
+			strbuf_add(sb, line, linelen);
+		}
 		strbuf_addch(sb, '\n');
 	}
 }
@@ -1678,14 +1772,14 @@ void pretty_print_commit(struct pretty_print_context *pp,
 	encoding = get_log_output_encoding();
 	msg = reencoded = logmsg_reencode(commit, NULL, encoding);
 
-	if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
+	if (pp->fmt == CMIT_FMT_ONELINE || cmit_fmt_is_mail(pp->fmt))
 		indent = 0;
 
 	/*
 	 * We need to check and emit Content-type: to mark it
 	 * as 8-bit if we haven't done so.
 	 */
-	if (pp->fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
+	if (cmit_fmt_is_mail(pp->fmt) && need_8bit_cte == 0) {
 		int i, ch, in_body;
 
 		for (in_body = i = 0; (ch = msg[i]); i++) {
@@ -1710,10 +1804,10 @@ void pretty_print_commit(struct pretty_print_context *pp,
 	}
 
 	/* Skip excess blank lines at the beginning of body, if any... */
-	msg = skip_empty_lines(msg);
+	msg = skip_blank_lines(msg);
 
 	/* These formats treat the title line specially. */
-	if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
+	if (pp->fmt == CMIT_FMT_ONELINE || cmit_fmt_is_mail(pp->fmt))
 		pp_title_line(pp, &msg, sb, encoding, need_8bit_cte);
 
 	beginning_of_body = sb->len;
@@ -1730,7 +1824,7 @@ void pretty_print_commit(struct pretty_print_context *pp,
 	 * format.  Make sure we did not strip the blank line
 	 * between the header and the body.
 	 */
-	if (pp->fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
+	if (cmit_fmt_is_mail(pp->fmt) && sb->len <= beginning_of_body)
 		strbuf_addch(sb, '\n');
 
 	unuse_commit_buffer(commit, reencoded);