X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=diff.c;h=18fa7a712cc3a40ae8ce30295e5daf72bf015c95;hb=d6096f17d2d5d9ccb453aabf8edc6ee238b166fc;hp=a6c143251c8cd7da84400b960cb153b6f24c2ae6;hpb=8a3f524bf2ac534b313a7d8e70cc164cef744949;p=git.git

diff --git a/diff.c b/diff.c
index a6c143251..18fa7a712 100644
--- a/diff.c
+++ b/diff.c
@@ -20,6 +20,7 @@
 
 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;
@@ -176,6 +177,12 @@ int git_diff_basic_config(const char *var, const char *value, void *cb)
 		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) {
@@ -575,6 +582,12 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 		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.
 	 */
@@ -1368,6 +1381,8 @@ static struct builtin_funcname_pattern {
 	const char *name;
 	const char *pattern;
 } builtin_funcname_pattern[] = {
+	{ "bibtex", "\\(@[a-zA-Z]\\{1,\\}[ \t]*{\\{0,1\\}[ \t]*[^ \t\"@',\\#}{~%]*\\).*$" },
+	{ "html", "^\\s*\\(<[Hh][1-6]\\s.*>.*\\)$" },
 	{ "java", "!^[ 	]*\\(catch\\|do\\|for\\|if\\|instanceof\\|"
 			"new\\|return\\|switch\\|throw\\|while\\)\n"
 			"^[ 	]*\\(\\([ 	]*"
@@ -1379,9 +1394,9 @@ static struct builtin_funcname_pattern {
 			"\\|"
 			"^\\(.*=[ \t]*\\(class\\|record\\).*\\)$"
 			},
-	{ "bibtex", "\\(@[a-zA-Z]\\{1,\\}[ \t]*{\\{0,1\\}[ \t]*[^ \t\"@',\\#}{~%]*\\).*$" },
-	{ "tex", "^\\(\\\\\\(\\(sub\\)*section\\|chapter\\|part\\)\\*\\{0,1\\}{.*\\)$" },
+	{ "python", "^\\s*\\(\\(class\\|def\\)\\s.*\\)$" },
 	{ "ruby", "^\\s*\\(\\(class\\|module\\|def\\)\\s.*\\)$" },
+	{ "tex", "^\\(\\\\\\(\\(sub\\)*section\\|chapter\\|part\\)\\*\\{0,1\\}{.*\\)$" },
 };
 
 static const char *diff_funcname_pattern(struct diff_filespec *one)
@@ -1615,6 +1630,7 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
 		xdemitcb_t ecb;
 
 		memset(&xecfg, 0, sizeof(xecfg));
+		xecfg.ctxlen = 1; /* at least one context line */
 		xpp.flags = XDF_NEED_MINIMAL;
 		xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data,
 			      &xpp, &xecfg, &ecb);