Add git_log_link() and fix bug in generic repolink function

The generic repolink function compared head with cgit_query_head, which
almost always would be the same pointer. The test now compares with
repo.defbranch, which is the wanted behavour.

Bug discovered while adding cgit_log_link(), so this commit also contain
that change.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgit.h

@@ -203,6 +203,8 @@ extern char *cgit_pageurl(const char *reponame, const char *pagename,
 
 extern void cgit_tree_link(char *name, char *title, char *class, char *head,
 			   char *rev, char *path);
+extern void cgit_log_link(char *name, char *title, char *class, char *head,
+			  char *rev, char *path);
 
 extern void cgit_print_error(char *msg);
 extern void cgit_print_date(time_t secs, char *format);

ui-repolist.c

@@ -89,9 +89,7 @@ void cgit_print_repolist(struct cacheitem *item)
 		html_link_open(cgit_repourl(cgit_repo->url),
 			       "Summary", "button");
 		html("S</a>");
-		html_link_open(cgit_pageurl(cgit_repo->name, "log", NULL),
-			       "Log", "button");
-		html("L</a>");
+		cgit_log_link("L", "Log", "button", NULL, NULL, NULL);
 		cgit_tree_link("F", "Files", "button", NULL, NULL, NULL);
 		html("</td></tr>\n");
 	}

ui-shared.c

@@ -127,7 +127,7 @@ static char *repolink(char *title, char *class, char *page, char *head,
 			html_attr(path);
 		delim = "&";
 	}
-	if (head && strcmp(head, cgit_query_head)) {
+	if (head && strcmp(head, cgit_repo->defbranch)) {
 		html(delim);
 		html("h=");
 		html_attr(head);
@@ -136,12 +136,12 @@ static char *repolink(char *title, char *class, char *page, char *head,
 	return fmt("%s", delim);
 }
 
-void cgit_tree_link(char *name, char *title, char *class, char *head,
-		    char *rev, char *path)
+static char *reporevlink(char *page, char *name, char *title, char *class,
+			 char *head, char *rev, char *path)
 {
 	char *delim;
 
-	delim = repolink(title, class, "tree", head, path);
+	delim = repolink(title, class, page, head, path);
 	if (rev && strcmp(rev, cgit_query_head)) {
 		html(delim);
 		html("id=");
@@ -152,6 +152,18 @@ void cgit_tree_link(char *name, char *title, char *class, char *head,
 	html("</a>");
 }
 
+void cgit_tree_link(char *name, char *title, char *class, char *head,
+		    char *rev, char *path)
+{
+	reporevlink("tree", name, title, class, head, rev, path);
+}
+
+void cgit_log_link(char *name, char *title, char *class, char *head,
+		   char *rev, char *path)
+{
+	reporevlink("log", name, title, class, head, rev, path);
+}
+
 void cgit_print_date(time_t secs, char *format)
 {
 	char buf[64];

ui-summary.c

@@ -25,11 +25,7 @@ static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
 	if (commit && !parse_commit(commit)){
 		info = cgit_parse_commit(commit);
 		html("<tr><td>");
-		url = cgit_pageurl(cgit_query_repo, "log",
-				   fmt("h=%s", refname));
-		html_link_open(url, NULL, NULL);
-		html_txt(buf);
-		html_link_close();
+		cgit_log_link(refname, NULL, NULL, refname, NULL, NULL);
 		html("</td><td>");
 		cgit_print_age(commit->date, -1, NULL);
 		html("</td><td>");

ui-tree.c

@@ -92,14 +92,10 @@ static int ls_item(const unsigned char *sha1, const char *base, int baselen,
 	}
 	htmlf("</td><td class='ls-size'>%li</td>", size);
 
-	html("<td><a href='");
-	qry = fmt("h=%s&amp;path=%s%s%s", curr_rev,
-		  cgit_query_path ? cgit_query_path : "",
-		  cgit_query_path ? "/" : "", pathname);
-	url = cgit_pageurl(cgit_query_repo, "log", qry);
-	html_attr(url);
-	html("' title='Log' class='button'>L</a></td>");
-	html("</tr>\n");
+	html("<td>");
+	cgit_log_link("L", "Log", "button", cgit_query_head, curr_rev,
+		      fullpath);
+	html("</td></tr>\n");
 	free(name);
 	return 0;
 }