affects only 'git-diff' Porcelain, and not lower level
'diff' commands, such as 'git-diff-files'.
+diff.suppress-blank-empty::
+ A boolean to inhibit the standard behavior of printing a space
+ before each empty output line. Defaults to false.
+
diff.external::
If this config variable is set, diff generation is not
performed using the internal diff machinery, but using the
static int diff_detect_rename_default;
static int diff_rename_limit_default = 200;
+static int diff_suppress_blank_empty;
int diff_use_color_default = -1;
static const char *external_diff_cmd_cfg;
int diff_auto_refresh_index = 1;
return 0;
}
+ /* like GNU diff's --suppress-blank-empty option */
+ if (!strcmp(var, "diff.suppress-blank-empty")) {
+ diff_suppress_blank_empty = git_config_bool(var, value);
+ return 0;
+ }
+
if (!prefixcmp(var, "diff.")) {
const char *ep = strrchr(var, '.');
if (ep != var + 4) {
ecbdata->label_path[0] = ecbdata->label_path[1] = NULL;
}
+ if (diff_suppress_blank_empty
+ && len == 2 && line[0] == ' ' && line[1] == '\n') {
+ line[0] = '\n';
+ len = 1;
+ }
+
/* This is not really necessary for now because
* this codepath only deals with two-way diffs.
*/
--- /dev/null
+#!/bin/bash
+#
+# Copyright (c) Jim Meyering
+#
+test_description='diff honors config option, diff.suppress-blank-empty'
+
+. ./test-lib.sh
+
+cat <<\EOF > exp ||
+diff --git a/f b/f
+index 5f6a263..8cb8bae 100644
+--- a/f
++++ b/f
+@@ -1,2 +1,2 @@
+
+-x
++y
+EOF
+exit 1
+
+test_expect_success \
+ "$test_description" \
+ 'printf "\nx\n" > f &&
+ git add f &&
+ git commit -q -m. f &&
+ printf "\ny\n" > f &&
+ git config --bool diff.suppress-blank-empty true &&
+ git diff f > actual &&
+ test_cmp exp actual &&
+ perl -i.bak -p -e "s/^\$/ /" exp &&
+ git config --bool diff.suppress-blank-empty false &&
+ git diff f > actual &&
+ test_cmp exp actual &&
+ git config --bool --unset diff.suppress-blank-empty &&
+ git diff f > actual &&
+ test_cmp exp actual
+ '
+
+test_done