Add cgit_commit_link() + support for id=sha1 to commit view

This adds a function to generate links to the commit page and extends said
page to use id from querystring as primary revision specified (fallback to
h).

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

cgit.c

@@ -100,7 +100,7 @@ static void cgit_print_repo_page(struct cacheitem *item)
 		cgit_print_tree(cgit_query_sha1, cgit_query_path);
 		break;
 	case CMD_COMMIT:
-		cgit_print_commit(cgit_query_head);
+		cgit_print_commit(cgit_query_sha1);
 		break;
 	case CMD_DIFF:
 		cgit_print_diff(cgit_query_head, cgit_query_sha1, cgit_query_sha2,

cgit.h

@@ -205,6 +205,8 @@ 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_commit_link(char *name, char *title, char *class, char *head,
+			     char *rev);
 
 extern void cgit_print_error(char *msg);
 extern void cgit_print_date(time_t secs, char *format);

ui-commit.c

@@ -156,6 +156,9 @@ void cgit_print_commit(const char *hex)
 	char *tmp;
 	int i;
 
+	if (!hex)
+		hex = cgit_query_head;
+
 	if (get_sha1(hex, sha1)) {
 		cgit_print_error(fmt("Bad object id: %s", hex));
 		return;

ui-log.c

@@ -31,11 +31,8 @@ void print_commit(struct commit *commit)
 	html("<tr><td>");
 	cgit_print_age(commit->date, TM_WEEK * 2, FMT_SHORTDATE);
 	html("</td><td>");
-	char *qry = fmt("h=%s", sha1_to_hex(commit->object.sha1));
-	char *url = cgit_pageurl(cgit_query_repo, "commit", qry);
-	html_link_open(url, NULL, NULL);
-	html_ntxt(cgit_max_msg_len, info->subject);
-	html_link_close();
+	cgit_commit_link(info->subject, NULL, NULL, cgit_query_head,
+			 sha1_to_hex(commit->object.sha1));
 	if (cgit_repo->enable_log_filecount) {
 		files = 0;
 		lines = 0;

ui-shared.c

@@ -136,7 +136,7 @@ static char *repolink(char *title, char *class, char *page, char *head,
 	return fmt("%s", delim);
 }
 
-static char *reporevlink(char *page, char *name, char *title, char *class,
+static void reporevlink(char *page, char *name, char *title, char *class,
 			char *head, char *rev, char *path)
 {
 	char *delim;
@@ -164,6 +164,18 @@ void cgit_log_link(char *name, char *title, char *class, char *head,
 	reporevlink("log", name, title, class, head, rev, path);
 }
 
+void cgit_commit_link(char *name, char *title, char *class, char *head,
+		      char *rev)
+{
+	if (strlen(name) > cgit_max_msg_len && cgit_max_msg_len >= 15) {
+		name[cgit_max_msg_len] = '\0';
+		name[cgit_max_msg_len - 1] = '.';
+		name[cgit_max_msg_len - 2] = '.';
+		name[cgit_max_msg_len - 3] = '.';
+	}
+	reporevlink("commit", name, title, class, head, rev, NULL);
+}
+
 void cgit_print_date(time_t secs, char *format)
 {
 	char buf[64];

ui-summary.c

@@ -15,8 +15,10 @@ static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
 {
 	struct commit *commit;
 	struct commitinfo *info;
-	char buf[256], *url;
+	char buf[256];
+	char *ref;
 
+	ref = xstrdup(refname);
 	strncpy(buf, refname, sizeof(buf));
 	commit = lookup_commit(sha1);
 	// object is not really parsed at this point, because of some fallout
@@ -25,17 +27,13 @@ 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>");
-		cgit_log_link(refname, NULL, NULL, refname, NULL, NULL);
+		cgit_log_link(ref, NULL, NULL, ref, NULL, NULL);
 		html("</td><td>");
 		cgit_print_age(commit->date, -1, NULL);
 		html("</td><td>");
 		html_txt(info->author);
 		html("</td><td>");
-		url = cgit_pageurl(cgit_query_repo, "commit",
-				   fmt("h=%s", sha1_to_hex(sha1)));
-		html_link_open(url, NULL, NULL);
-		html_ntxt(cgit_max_msg_len, info->subject);
-		html_link_close();
+		cgit_commit_link(info->subject, NULL, NULL, ref, NULL);
 		html("</td></tr>\n");
 		cgit_free_commitinfo(info);
 	} else {
@@ -45,6 +43,7 @@ static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
 		htmlf("*** bad ref %s ***", sha1_to_hex(sha1));
 		html("</td></tr>\n");
 	}
+	free(ref);
 	return 0;
 }
 
@@ -54,8 +53,9 @@ static void cgit_print_object_ref(struct object *obj)
 	char *page, *arg, *url;
 
 	if (obj->type == OBJ_COMMIT) {
-		page = "commit";
-		arg = "h";
+                cgit_commit_link(fmt("commit %s", sha1_to_hex(obj->sha1)), NULL, NULL,
+				 cgit_query_head, sha1_to_hex(obj->sha1));
+		return;
 	} else if (obj->type == OBJ_TREE) {
 		page = "tree";
 		arg = "id";

ui-tree.c

@@ -58,7 +58,6 @@ static int ls_item(const unsigned char *sha1, const char *base, int baselen,
 	char *fullpath;
 	enum object_type type;
 	unsigned long size = 0;
-	char *url, *qry;
 
 	name = xstrdup(pathname);
 	fullpath = fmt("%s%s%s", cgit_query_path ? cgit_query_path : "",