Merge branch 'nd/graph-width-padded' into maint

"log --graph --format=" learned that "%>|(N)" specifies the width
relative to the terminal's left edge, not relative to the area to
draw text that is to the right of the ancestry-graph section.  It
also now accepts negative N that means the column limit is relative
to the right border.

* nd/graph-width-padded:
  pretty.c: support <direction>|(<negative number>) forms
  pretty: pass graph width to pretty formatting for use in '%>|(N)'

Author: gitster

commit.h

@@ -161,6 +161,7 @@ struct pretty_print_context {
 	 * should not be counted on by callers.
 	 */
 	struct string_list in_body_headers;
+	int graph_width;
 };
 
 struct userformat_want {

graph.c

@@ -669,6 +669,13 @@ static void graph_output_padding_line(struct git_graph *graph,
 	graph_pad_horizontally(graph, sb, graph->num_new_columns * 2);
 }
 
+
+int graph_width(struct git_graph *graph)
+{
+	return graph->width;
+}
+
+
 static void graph_output_skip_line(struct git_graph *graph, struct strbuf *sb)
 {
 	/*

graph.h

@@ -67,6 +67,11 @@ int graph_is_commit_finished(struct git_graph const *graph);
 int graph_next_line(struct git_graph *graph, struct strbuf *sb);
 
 
+/*
+ * Return current width of the graph in on-screen characters.
+ */
+int graph_width(struct git_graph *graph);
+
 /*
  * graph_show_*: helper functions for printing to stdout
  */

log-tree.c

@@ -687,6 +687,8 @@ void show_log(struct rev_info *opt)
 	ctx.output_encoding = get_log_output_encoding();
 	if (opt->from_ident.mail_begin && opt->from_ident.name_begin)
 		ctx.from_ident = &opt->from_ident;
+	if (opt->graph)
+		ctx.graph_width = graph_width(opt->graph);
 	pretty_print_commit(&ctx, commit, &msgbuf);
 
 	if (opt->add_signoff)

pretty.c

@@ -1022,9 +1022,15 @@ 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;
 
@@ -1299,6 +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) {

t/t4205-log-pretty-formats.sh

@@ -176,6 +176,17 @@ EOF
 	test_cmp expected actual
 '
 
+test_expect_success 'left alignment formatting at the nth column' '
+	COLUMNS=50 git log --pretty="tformat:%h %<|(-10)%s" >actual &&
+	qz_to_tab_space <<EOF >expected &&
+$head1 message two                    Z
+$head2 message one                    Z
+$head3 add bar                        Z
+$head4 $(commit_msg)            Z
+EOF
+	test_cmp expected actual
+'
+
 test_expect_success 'left alignment formatting at the nth column. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%h %<|(40)%s" >actual &&
 	qz_to_tab_space <<EOF | iconv -f utf-8 -t $test_encoding >expected &&
@@ -308,6 +319,17 @@ EOF
 	test_cmp expected actual
 '
 
+test_expect_success 'right alignment formatting at the nth column' '
+	COLUMNS=50 git log --pretty="tformat:%h %>|(-10)%s" >actual &&
+	qz_to_tab_space <<EOF >expected &&
+$head1                      message two
+$head2                      message one
+$head3                          add bar
+$head4              $(commit_msg)
+EOF
+	test_cmp expected actual
+'
+
 test_expect_success 'right alignment formatting at the nth column. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%h %>|(40)%s" >actual &&
 	qz_to_tab_space <<EOF | iconv -f utf-8 -t $test_encoding >expected &&
@@ -319,6 +341,19 @@ EOF
 	test_cmp expected actual
 '
 
+# Note: Space between 'message' and 'two' should be in the same column
+# as in previous test.
+test_expect_success 'right alignment formatting at the nth column with --graph. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --graph --pretty="tformat:%h %>|(40)%s" >actual &&
+	iconv -f utf-8 -t $test_encoding >expected <<EOF&&
+* $head1                    message two
+* $head2                    message one
+* $head3                        add bar
+* $head4            $(commit_msg)
+EOF
+	test_cmp expected actual
+'
+
 test_expect_success 'right alignment formatting with no padding' '
 	git log --pretty="tformat:%>(1)%s" >actual &&
 	cat <<EOF >expected &&
@@ -330,6 +365,17 @@ EOF
 	test_cmp expected actual
 '
 
+test_expect_success 'right alignment formatting with no padding and with --graph' '
+	git log --graph --pretty="tformat:%>(1)%s" >actual &&
+	cat <<EOF >expected &&
+* message two
+* message one
+* add bar
+* $(commit_msg)
+EOF
+	test_cmp expected actual
+'
+
 test_expect_success 'right alignment formatting with no padding. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%>(1)%s" >actual &&
 	cat <<EOF | iconv -f utf-8 -t $test_encoding >expected &&
@@ -373,6 +419,17 @@ EOF
 	test_cmp expected actual
 '
 
+test_expect_success 'center alignment formatting at the nth column' '
+	COLUMNS=70 git log --pretty="tformat:%h %><|(-30)%s" >actual &&
+	qz_to_tab_space <<EOF >expected &&
+$head1           message two          Z
+$head2           message one          Z
+$head3             add bar            Z
+$head4       $(commit_msg)      Z
+EOF
+	test_cmp expected actual
+'
+
 test_expect_success 'center alignment formatting at the nth column. i18n.logOutputEncoding' '
 	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%h %><|(40)%s" >actual &&
 	qz_to_tab_space <<EOF | iconv -f utf-8 -t $test_encoding >expected &&