A new option --stat-graph-width=<width> can be used to limit the width
of the graph part even is more space is available. Up to <width>
columns will be used for the graph.
If commits changing a lot of lines are displayed in a wide terminal
window (200 or more columns), and the +- graph uses the full width,
the output can be hard to comfortably scan with a horizontal movement
of human eyes. Messages wrapped to about 80 columns would be
interspersed with very long +- lines. It makes sense to limit the
width of the graph part to a fixed value (e.g. 70 columns), even if
more columns are available.
Signed-off-by: Zbigniew Jędrzejewski-Szmek <zbyszek@xxxxxxxxx>
---
Documentation/diff-options.txt | 2 ++
diff.c | 23 +++++++++++++++++++++--
diff.h | 1 +
t/t4052-stat-output.sh | 6 ++++++
4 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 6b9408f..d34efd5 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -59,6 +59,8 @@ endif::git-format-patch[]
or 80 columns if not connected to a terminal, and can be
overriden by `<width>`. The width of the filename part can be
limited by giving another width `<name-width>` after a comma.
+ The width of the graph part can be limited by using
+ `--stat-graph-width=<width>`.
By giving a third parameter `<count>`, you can limit the
output to the first `<count>` lines, followed by `...` if
there are more.
diff --git a/diff.c b/diff.c
index 318e070..9012c09 100644
--- a/diff.c
+++ b/diff.c
@@ -1421,13 +1421,15 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
/*
* We have width = stat_width or term_columns() columns total.
* We want a maximum of min(max_len, stat_name_width) for the name part.
+ * We want a maximum of min(max_change, stat_graph_width) for the +- part.
* We also need 1 for " " and 4 + decimal_width(max_change)
* for " | NNNN " and one the empty column at the end, altogether
* 6 + decimal_width(max_change).
*
* If there's not enough space, we will use the smaller of
* stat_name_width (if set) and 5/8*width for the filename,
- * and the rest for constant elements + graph part.
+ * and the rest for constant elements + graph part, but no more
+ * than stat_graph_width for the graph part.
* (5/8 gives 50 for filename and 30 for the constant parts + graph
* for the standard terminal size).
*
@@ -1452,7 +1454,9 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
/*
* First assign sizes that are wanted, ignoring available width.
*/
- graph_width = max_change;
+ graph_width = (options->stat_graph_width &&
+ options->stat_graph_width < max_change) ?
+ options->stat_graph_width : max_change;
name_width = (options->stat_name_width > 0 &&
options->stat_name_width < max_len) ?
options->stat_name_width : max_len;
@@ -1463,6 +1467,9 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
if (name_width + number_width + 6 + graph_width > width) {
if (graph_width > width * 3/8 - number_width - 6)
graph_width = width * 3/8 - number_width - 6;
+ if (options->stat_graph_width &&
+ graph_width > options->stat_graph_width)
+ graph_width = options->stat_graph_width;
if (name_width > width - number_width - 6 - graph_width)
name_width = width - number_width - 6 - graph_width;
else
@@ -3332,6 +3339,7 @@ static int stat_opt(struct diff_options *options, const char **av)
char *end;
int width = options->stat_width;
int name_width = options->stat_name_width;
+ int graph_width = options->stat_graph_width;
int count = options->stat_count;
int argcount = 1;
@@ -3360,6 +3368,16 @@ static int stat_opt(struct diff_options *options, const char **av)
name_width = strtoul(av[1], &end, 10);
argcount = 2;
}
+ } else if (!prefixcmp(arg, "-graph-width")) {
+ arg += strlen("-graph-width");
+ if (*arg == '=')
+ graph_width = strtoul(arg + 1, &end, 10);
+ else if (!*arg && !av[1])
+ die("Option '--stat-graph-width' requires a value");
+ else if (!*arg) {
+ graph_width = strtoul(av[1], &end, 10);
+ argcount = 2;
+ }
} else if (!prefixcmp(arg, "-count")) {
arg += strlen("-count");
if (*arg == '=')
@@ -3385,6 +3403,7 @@ static int stat_opt(struct diff_options *options, const char **av)
return 0;
options->output_format |= DIFF_FORMAT_DIFFSTAT;
options->stat_name_width = name_width;
+ options->stat_graph_width = graph_width;
options->stat_width = width;
options->stat_count = count;
return argcount;
diff --git a/diff.h b/diff.h
index 7af5f1e..e6a782c 100644
--- a/diff.h
+++ b/diff.h
@@ -129,6 +129,7 @@ struct diff_options {
int stat_width;
int stat_name_width;
+ int stat_graph_width;
int stat_count;
const char *word_regex;
enum diff_words_type word_diff;
diff --git a/t/t4052-stat-output.sh b/t/t4052-stat-output.sh
index 84be8bd..e606202 100755
--- a/t/t4052-stat-output.sh
+++ b/t/t4052-stat-output.sh
@@ -135,6 +135,12 @@ do
grep " | " output >actual &&
test_cmp expect actual
'
+
+ test_expect_success "$cmd --stat-graph--width with big change" '
+ git $cmd $args --stat-graph-width=26 >output
+ grep " | " output >actual &&
+ test_cmp expect actual
+ '
done <<\EOF
format-patch -1 --stdout
diff HEAD^ HEAD --stat
--
1.7.9.2.332.g05f13
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