Add config.def.h and make summary length configurable

Makefile

@@ -33,7 +33,11 @@ dist: $(BIN)
 	(cd release/${VERSION}; \
 	tar -czf ../../urmoms-${VERSION}.tar.gz .)
 
-${OBJ}: config.mk ${HDR}
+${OBJ}: config.h config.mk ${HDR}
+
+config.h:
+	@echo creating $@ from config.def.h
+	@cp config.def.h $@
 
 urmoms: urmoms.o
 	${CC} -o $@ urmoms.o ${LDFLAGS}

config.def.h

@@ -0,0 +1,2 @@
+/* See LICENSE file for copyright and license details. */
+static const unsigned summarylen = 70; /* summary length in the log */

urmoms.c

@@ -10,6 +10,7 @@
 #include <string.h>
 #include <unistd.h>
 
+#include "config.h"
 #include "git2.h"
 
 struct commitinfo {
@@ -428,9 +429,9 @@ writelog(FILE *fp)
 		fputs("</td><td>", fp);
 		if (ci->summary) {
 			fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
-			if ((len = strlen(ci->summary)) > 79) {
-				xmlencode(fp, ci->summary, 76);
-				fputs("...", fp);
+			if ((len = strlen(ci->summary)) > summarylen) {
+				xmlencode(fp, ci->summary, summarylen - 1);
+				fputs("…", fp);
 			} else {
 				xmlencode(fp, ci->summary, len);
 			}