Add and use cgit_tree_link()

This creates a new function used to generate links to 'tree' page and uses
the function everywhere a link to the 'tree' page is generated.

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

5 files changed, 107 insertions, 38 deletions

diff --git a/cgit.h b/cgit.h
index b93e2e8..9a19c97 100644
--- a/cgit.h
+++ b/cgit.h
@@ -156,71 +156,74 @@ extern void cgit_querystring_cb(const char *name, const char *value);
 
 extern int chk_zero(int result, char *msg);
 extern int chk_positive(int result, char *msg);
 
 extern int hextoint(char c);
 
 extern void *cgit_free_commitinfo(struct commitinfo *info);
 
 extern int cgit_diff_files(const unsigned char *old_sha1,
 			   const unsigned char *new_sha1,
 			   linediff_fn fn);
 
 extern void cgit_diff_tree(const unsigned char *old_sha1,
 			   const unsigned char *new_sha1,
 			   filepair_fn fn);
 
 extern void cgit_diff_commit(struct commit *commit, filepair_fn fn);
 
 extern char *fmt(const char *format,...);
 
 extern void html(const char *txt);
 extern void htmlf(const char *format,...);
 extern void html_txt(char *txt);
 extern void html_ntxt(int len, char *txt);
 extern void html_attr(char *txt);
 extern void html_hidden(char *name, char *value);
 extern void html_link_open(char *url, char *title, char *class);
 extern void html_link_close(void);
 extern void html_filemode(unsigned short mode);
 extern int html_include(const char *filename);
 
 extern int cgit_read_config(const char *filename, configfn fn);
 extern int cgit_parse_query(char *txt, configfn fn);
 extern struct commitinfo *cgit_parse_commit(struct commit *commit);
 extern struct taginfo *cgit_parse_tag(struct tag *tag);
 extern void cgit_parse_url(const char *url);
 
 extern char *cache_safe_filename(const char *unsafe);
 extern int cache_lock(struct cacheitem *item);
 extern int cache_unlock(struct cacheitem *item);
 extern int cache_cancel_lock(struct cacheitem *item);
 extern int cache_exist(struct cacheitem *item);
 extern int cache_expired(struct cacheitem *item);
 
 extern char *cgit_repourl(const char *reponame);
 extern char *cgit_pageurl(const char *reponame, const char *pagename,
 			  const char *query);
 
+extern void cgit_tree_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);
 extern void cgit_print_age(time_t t, time_t max_relative, char *format);
 extern void cgit_print_docstart(char *title, struct cacheitem *item);
 extern void cgit_print_docend();
 extern void cgit_print_pageheader(char *title, int show_search);
 extern void cgit_print_snapshot_start(const char *mimetype,
 				      const char *filename,
 				      struct cacheitem *item);
 
 extern void cgit_print_repolist(struct cacheitem *item);
 extern void cgit_print_summary();
 extern void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *path, int pager);
 extern void cgit_print_blob(struct cacheitem *item, const char *hex, char *path);
 extern void cgit_print_tree(const char *rev, char *path);
 extern void cgit_print_commit(const char *hex);
 extern void cgit_print_diff(const char *head, const char *old_hex, const char *new_hex,
 			    char *path);
 extern void cgit_print_snapshot(struct cacheitem *item, const char *hex,
 				const char *format, const char *prefix,
 				const char *filename);
 
 #endif /* CGIT_H */
diff --git a/ui-commit.c b/ui-commit.c
index ed5384d..885f870 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -108,128 +108,130 @@ void print_fileinfo(struct fileinfo *info)
 
 void cgit_count_diff_lines(char *line, int len)
 {
 	if (line && (len > 0)) {
 		if (line[0] == '+')
 			lines_added++;
 		else if (line[0] == '-')
 			lines_removed++;
 	}
 }
 
 void inspect_filepair(struct diff_filepair *pair)
 {
 	files++;
 	lines_added = 0;
 	lines_removed = 0;
 	cgit_diff_files(pair->one->sha1, pair->two->sha1, cgit_count_diff_lines);
 	if (files >= slots) {
 		if (slots == 0)
 			slots = 4;
 		else
 			slots = slots * 2;
 		items = xrealloc(items, slots * sizeof(struct fileinfo));
 	}
 	items[files-1].status = pair->status;
 	hashcpy(items[files-1].old_sha1, pair->one->sha1);
 	hashcpy(items[files-1].new_sha1, pair->two->sha1);
 	items[files-1].old_mode = pair->one->mode;
 	items[files-1].new_mode = pair->two->mode;
 	items[files-1].old_path = xstrdup(pair->one->path);
 	items[files-1].new_path = xstrdup(pair->two->path);
 	items[files-1].added = lines_added;
 	items[files-1].removed = lines_removed;
 	if (lines_added + lines_removed > max_changes)
 		max_changes = lines_added + lines_removed;
 	total_adds += lines_added;
 	total_rems += lines_removed;
 }
 
 
 void cgit_print_commit(const char *hex)
 {
 	struct commit *commit, *parent;
 	struct commitinfo *info;
 	struct commit_list *p;
 	unsigned char sha1[20];
 	char *query;
 	char *filename;
+	char *tmp;
 	int i;
 
 	if (get_sha1(hex, sha1)) {
 		cgit_print_error(fmt("Bad object id: %s", hex));
 		return;
 	}
 	commit = lookup_commit_reference(sha1);
 	if (!commit) {
 		cgit_print_error(fmt("Bad commit reference: %s", hex));
 		return;
 	}
 	info = cgit_parse_commit(commit);
 
 	html("<table class='commit-info'>\n");
 	html("<tr><th>author</th><td>");
 	html_txt(info->author);
 	html(" ");
 	html_txt(info->author_email);
 	html("</td><td class='right'>");
 	cgit_print_date(info->author_date, FMT_LONGDATE);
 	html("</td></tr>\n");
 	html("<tr><th>committer</th><td>");
 	html_txt(info->committer);
 	html(" ");
 	html_txt(info->committer_email);
 	html("</td><td class='right'>");
 	cgit_print_date(info->committer_date, FMT_LONGDATE);
 	html("</td></tr>\n");
-	html("<tr><th>tree</th><td colspan='2' class='sha1'><a href='");
-	query = fmt("h=%s", sha1_to_hex(commit->object.sha1));
-	html_attr(cgit_pageurl(cgit_query_repo, "tree", query));
-	htmlf("'>%s</a></td></tr>\n", sha1_to_hex(commit->tree->object.sha1));
+	html("<tr><th>tree</th><td colspan='2' class='sha1'>");
+	tmp = xstrdup(hex);
+	cgit_tree_link(sha1_to_hex(commit->tree->object.sha1), NULL, NULL,
+		       cgit_query_head, tmp, NULL);
+	html("</td></tr>\n");
       	for (p = commit->parents; p ; p = p->next) {
 		parent = lookup_commit_reference(p->item->object.sha1);
 		if (!parent) {
 			html("<tr><td colspan='3'>");
 			cgit_print_error("Error reading parent commit");
 			html("</td></tr>");
 			continue;
 		}
 		html("<tr><th>parent</th>"
 		     "<td colspan='2' class='sha1'>"
 		     "<a href='");
 		query = fmt("h=%s", sha1_to_hex(p->item->object.sha1));
 		html_attr(cgit_pageurl(cgit_query_repo, "commit", query));
 		htmlf("'>%s</a> (<a href='",
 		      sha1_to_hex(p->item->object.sha1));
 		query = fmt("id=%s&amp;id2=%s", sha1_to_hex(parent->tree->object.sha1),
 			    sha1_to_hex(commit->tree->object.sha1));
 		html_attr(cgit_pageurl(cgit_query_repo, "diff", query));
 		html("'>diff</a>)</td></tr>");
 	}
 	if (cgit_repo->snapshots) {
 		htmlf("<tr><th>download</th><td colspan='2' class='sha1'><a href='");
 		filename = fmt("%s-%s.zip", cgit_query_repo, hex);
 		html_attr(cgit_pageurl(cgit_query_repo, "snapshot",
 				       fmt("id=%s&amp;name=%s", hex, filename)));
 		htmlf("'>%s</a></td></tr>", filename);
 	}
 	html("</table>\n");
 	html("<div class='commit-subject'>");
 	html_txt(info->subject);
 	html("</div>");
 	html("<div class='commit-msg'>");
 	html_txt(info->msg);
 	html("</div>");
 	if (!(commit->parents && commit->parents->next && commit->parents->next->next)) {
 		html("<div class='diffstat-header'>Diffstat</div>");
 		html("<table class='diffstat'>");
 		max_changes = 0;
 		cgit_diff_commit(commit, inspect_filepair);
 		for(i = 0; i<files; i++)
 			print_fileinfo(&items[i]);
 		html("</table>");
 		html("<div class='diffstat-summary'>");
 		htmlf("%d files changed, %d insertions, %d deletions (",
 		      files, total_adds, total_rems);
 		query = fmt("h=%s", hex);
 		html_link_open(cgit_pageurl(cgit_query_repo, "diff", query), NULL, NULL);
 		html("show diff</a>)");
diff --git a/ui-repolist.c b/ui-repolist.c
index e5c6c20..8ade91a 100644
--- a/ui-repolist.c
+++ b/ui-repolist.c
@@ -1,103 +1,100 @@
 /* ui-repolist.c: functions for generating the repolist page
  *
  * Copyright (C) 2006 Lars Hjemli
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  */
 
 #include "cgit.h"
 #include <time.h>
 
 
 time_t read_agefile(char *path)
 {
 	FILE *f;
 	static char buf[64], buf2[64];
 
 	if (!(f = fopen(path, "r")))
 		return -1;
 	fgets(buf, sizeof(buf), f);
 	fclose(f);
 	if (parse_date(buf, buf2, sizeof(buf2)))
 		return strtoul(buf2, NULL, 10);
 	else
 		return 0;
 }
 
 static void print_modtime(struct repoinfo *repo)
 {
 	char *path;
 	struct stat s;
 
 	path = fmt("%s/%s", repo->path, cgit_agefile);
 	if (stat(path, &s) == 0) {
 		cgit_print_age(read_agefile(path), -1, NULL);
 		return;
 	}
 
 	path = fmt("%s/refs/heads/%s", repo->path, repo->defbranch);
 	if (stat(path, &s) != 0)
 		return;
 	cgit_print_age(s.st_mtime, -1, NULL);
 }
 
 void cgit_print_repolist(struct cacheitem *item)
 {
-	struct repoinfo *repo;
 	int i;
 	char *last_group = NULL;
 
 	cgit_print_docstart(cgit_root_title, item);
 	cgit_print_pageheader(cgit_root_title, 0);
 
 	html("<table class='list nowrap'>");
 	if (cgit_index_header) {
 		html("<tr class='nohover'><td colspan='5' class='include-block'>");
 		html_include(cgit_index_header);
 		html("</td></tr>");
 	}
 	html("<tr class='nohover'>"
 	     "<th class='left'>Name</th>"
 	     "<th class='left'>Description</th>"
 	     "<th class='left'>Owner</th>"
 	     "<th class='left'>Idle</th>"
 	     "<th>Links</th></tr>\n");
 
 	for (i=0; i<cgit_repolist.count; i++) {
-		repo = &cgit_repolist.repos[i];
-		if ((last_group == NULL && repo->group != NULL) ||
-		    (last_group != NULL && repo->group == NULL) ||
-		    (last_group != NULL && repo->group!= NULL &&
-		     strcmp(repo->group, last_group))) {
+		cgit_repo = &cgit_repolist.repos[i];
+		if ((last_group == NULL && cgit_repo->group != NULL) ||
+		    (last_group != NULL && cgit_repo->group == NULL) ||
+		    (last_group != NULL && cgit_repo->group != NULL &&
+		     strcmp(cgit_repo->group, last_group))) {
 			html("<tr class='nohover'><td colspan='4' class='repogroup'>");
-			html_txt(repo->group);
+			html_txt(cgit_repo->group);
 			html("</td></tr>");
-			last_group = repo->group;
+			last_group = cgit_repo->group;
 		}
 		htmlf("<tr><td class='%s'>",
-		      repo->group ? "sublevel-repo" : "toplevel-repo");
-		html_link_open(cgit_repourl(repo->url), repo->desc, NULL);
-		html_txt(repo->name);
+		      cgit_repo->group ? "sublevel-repo" : "toplevel-repo");
+		html_link_open(cgit_repourl(cgit_repo->url), NULL, NULL);
+		html_txt(cgit_repo->name);
 		html_link_close();
 		html("</td><td>");
-		html_ntxt(cgit_max_repodesc_len, repo->desc);
+		html_ntxt(cgit_max_repodesc_len, cgit_repo->desc);
 		html("</td><td>");
-		html_txt(repo->owner);
+		html_txt(cgit_repo->owner);
 		html("</td><td>");
-		print_modtime(repo);
+		print_modtime(cgit_repo);
 		html("</td><td>");
-		html_link_open(cgit_repourl(repo->url),
+		html_link_open(cgit_repourl(cgit_repo->url),
 			       "Summary", "button");
 		html("S</a>");
-		html_link_open(cgit_pageurl(repo->name, "log", NULL),
+		html_link_open(cgit_pageurl(cgit_repo->name, "log", NULL),
 			       "Log", "button");
 		html("L</a>");
-		html_link_open(cgit_pageurl(repo->name, "tree", NULL),
-			       "Files", "button");
-		html("F</a>");
+		cgit_tree_link("F", "Files", "button", NULL, NULL, NULL);
 		html("</td></tr>\n");
 	}
 	html("</table>");
 	cgit_print_docend();
 }
diff --git a/ui-shared.c b/ui-shared.c
index aba93e8..9ab6409 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -42,96 +42,160 @@ void cgit_print_error(char *msg)
 
 char *cgit_rooturl()
 {
 	if (cgit_virtual_root)
 		return fmt("%s/", cgit_virtual_root);
 	else
 		return cgit_script_name;
 }
 
 char *cgit_repourl(const char *reponame)
 {
 	if (cgit_virtual_root) {
 		return fmt("%s/%s/", cgit_virtual_root, reponame);
 	} else {
 		return fmt("?r=%s", reponame);
 	}
 }
 
 char *cgit_pageurl(const char *reponame, const char *pagename,
 		   const char *query)
 {
 	if (cgit_virtual_root) {
 		if (query)
 			return fmt("%s/%s/%s/?%s", cgit_virtual_root, reponame,
 				   pagename, query);
 		else
 			return fmt("%s/%s/%s/", cgit_virtual_root, reponame,
 				   pagename);
 	} else {
 		if (query)
 			return fmt("?r=%s&amp;p=%s&amp;%s", reponame, pagename, query);
 		else
 			return fmt("?r=%s&amp;p=%s", reponame, pagename);
 	}
 }
 
 char *cgit_currurl()
 {
 	if (!cgit_virtual_root)
 		return cgit_script_name;
 	else if (cgit_query_page)
 		return fmt("%s/%s/%s/", cgit_virtual_root, cgit_query_repo, cgit_query_page);
 	else if (cgit_query_repo)
 		return fmt("%s/%s/", cgit_virtual_root, cgit_query_repo);
 	else
 		return fmt("%s/", cgit_virtual_root);
 }
 
+static char *repolink(char *title, char *class, char *page, char *head,
+		      char *path)
+{
+	char *delim = "?";
+
+	html("<a");
+	if (title) {
+		html(" title='");
+		html_attr(title);
+		html("'");
+	}
+	if (class) {
+		html(" class='");
+		html_attr(class);
+		html("'");
+	}
+	html(" href='");
+	if (cgit_virtual_root) {
+		html_attr(cgit_virtual_root);
+		if (cgit_virtual_root[strlen(cgit_virtual_root) - 1] != '/')
+			html("/");
+		html_attr(cgit_repo->url);
+		if (cgit_repo->url[strlen(cgit_repo->url) - 1] != '/')
+			html("/");
+		html(page);
+		html("/");
+		if (path)
+			html_attr(path);
+	} else {
+		html(cgit_script_name);
+		html("?url=");
+		html_attr(cgit_repo->url);
+		if (cgit_repo->url[strlen(cgit_repo->url) - 1] != '/')
+			html("/");
+		html(page);
+		html("/");
+		if (path)
+			html_attr(path);
+		delim = "&amp;";
+	}
+	if (head && head != cgit_query_head) {
+		html(delim);
+		html("h=");
+		html_attr(head);
+		delim = "&amp;";
+	}
+	return fmt("%s", delim);
+}
+
+void cgit_tree_link(char *name, char *title, char *class, char *head,
+		    char *rev, char *path)
+{
+	char *delim;
+
+	delim = repolink(title, class, "tree", head, path);
+	if (rev && rev != cgit_query_head) {
+		html(delim);
+		html("id=");
+		html_attr(rev);
+	}
+	html("'>");
+	html_txt(name);
+	html("</a>");
+}
 
 void cgit_print_date(time_t secs, char *format)
 {
 	char buf[64];
 	struct tm *time;
 
 	time = gmtime(&secs);
 	strftime(buf, sizeof(buf)-1, format, time);
 	html_txt(buf);
 }
 
 void cgit_print_age(time_t t, time_t max_relative, char *format)
 {
 	time_t now, secs;
 
 	time(&now);
 	secs = now - t;
 
 	if (secs > max_relative && max_relative >= 0) {
 		cgit_print_date(t, format);
 		return;
 	}
 
 	if (secs < TM_HOUR * 2) {
 		htmlf("<span class='age-mins'>%.0f min.</span>",
 		      secs * 1.0 / TM_MIN);
 		return;
 	}
 	if (secs < TM_DAY * 2) {
 		htmlf("<span class='age-hours'>%.0f hours</span>",
 		      secs * 1.0 / TM_HOUR);
 		return;
 	}
 	if (secs < TM_WEEK * 2) {
 		htmlf("<span class='age-days'>%.0f days</span>",
 		      secs * 1.0 / TM_DAY);
 		return;
 	}
 	if (secs < TM_MONTH * 2) {
 		htmlf("<span class='age-weeks'>%.0f weeks</span>",
 		      secs * 1.0 / TM_WEEK);
 		return;
 	}
 	if (secs < TM_YEAR * 2) {
 		htmlf("<span class='age-months'>%.0f months</span>",
 		      secs * 1.0 / TM_MONTH);
 		return;
 	}
diff --git a/ui-tree.c b/ui-tree.c
index db0bef6..3b82374 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -10,196 +10,199 @@
 
 char *curr_rev;
 char *match_path;
 int header = 0;
 
 static void print_object(const unsigned char *sha1, char *path)
 {
 	enum object_type type;
 	unsigned char *buf;
 	unsigned long size, lineno, start, idx;
 
 	type = sha1_object_info(sha1, &size);
 	if (type == OBJ_BAD) {
 		cgit_print_error(fmt("Bad object name: %s",
 				     sha1_to_hex(sha1)));
 		return;
 	}
 
 	buf = read_sha1_file(sha1, &type, &size);
 	if (!buf) {
 		cgit_print_error(fmt("Error reading object %s",
 				     sha1_to_hex(sha1)));
 		return;
 	}
 
 	html("<table class='blob'>\n");
 	idx = 0;
 	start = 0;
 	lineno = 0;
 	while(idx < size) {
 		if (buf[idx] == '\n') {
 			buf[idx] = '\0';
 			htmlf("<tr><td class='no'>%d</td><td class='txt'>",
 			      ++lineno);
 			html_txt(buf + start);
 			html("</td></tr>\n");
 			start = idx + 1;
 		}
 		idx++;
 	}
 	html("</table>\n");
 }
 
 
 static int ls_item(const unsigned char *sha1, const char *base, int baselen,
 		   const char *pathname, unsigned int mode, int stage)
 {
 	char *name;
+	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 : "",
+		       cgit_query_path ? "/" : "", name);
+
 	type = sha1_object_info(sha1, &size);
 	if (type == OBJ_BAD && !S_ISDIRLNK(mode)) {
 		htmlf("<tr><td colspan='3'>Bad object: %s %s</td></tr>",
 		      name,
 		      sha1_to_hex(sha1));
 		return 0;
 	}
-	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, "tree", qry);
+
 	html("<tr><td class='filemode'>");
 	html_filemode(mode);
 	html("</td><td ");
 	if (S_ISDIRLNK(mode)) {
 		htmlf("class='ls-mod'><a href='");
 		html_attr(fmt(cgit_repo->module_link,
 			      name,
 			      sha1_to_hex(sha1)));
+		html("'>");
+		html_txt(name);
+		html("</a>");
 	} else if (S_ISDIR(mode)) {
-		html("class='ls-dir'><a href='");
-		html_attr(url);
+		html("class='ls-dir'>");
+		cgit_tree_link(name, NULL, NULL, cgit_query_head,
+			       curr_rev, fullpath);
 	} else {
-		html("class='ls-blob'><a href='");
-		html_attr(url);
+		html("class='ls-blob'>");
+		cgit_tree_link(name, NULL, NULL, cgit_query_head,
+			       curr_rev, fullpath);
 	}
-	htmlf("'>%s</a></td>", name);
-	htmlf("<td class='filesize'>%li</td>", size);
+	htmlf("</td><td class='filesize'>%li</td>", size);
 
 	html("<td class='links'><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("' class='button'>H</a></td>");
 	html("</tr>\n");
 	free(name);
 	return 0;
 }
 
 static void ls_head()
 {
 	html("<table class='list'>\n");
 	html("<tr class='nohover'>");
 	html("<th class='left'>Mode</th>");
 	html("<th class='left'>Name</th>");
 	html("<th class='right'>Size</th>");
 	html("<th/>");
 	html("</tr>\n");
 	header = 1;
 }
 
 static void ls_tail()
 {
 	if (!header)
 		return;
 	html("</table>\n");
 	header = 0;
 }
 
 static void ls_tree(const unsigned char *sha1, char *path)
 {
 	struct tree *tree;
 
 	tree = parse_tree_indirect(sha1);
 	if (!tree) {
 		cgit_print_error(fmt("Not a tree object: %s",
 				     sha1_to_hex(sha1)));
 		return;
 	}
 
 	ls_head();
 	read_tree_recursive(tree, "", 0, 1, NULL, ls_item);
 	ls_tail();
 }
 
 
 static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
 		     const char *pathname, unsigned mode, int stage)
 {
 	static int state;
 	static char buffer[PATH_MAX];
 	char *url;
 
 	if (state == 0) {
 		memcpy(buffer, base, baselen);
 		strcpy(buffer+baselen, pathname);
 		url = cgit_pageurl(cgit_query_repo, "tree",
 				   fmt("h=%s&amp;path=%s", curr_rev, buffer));
-		htmlf(" / <a href='");
-		html_attr(url);
-		html("'>");
-		html_txt(xstrdup(pathname));
-		html("</a>");
+		html("/");
+		cgit_tree_link(xstrdup(pathname), NULL, NULL, cgit_query_head,
+			       curr_rev, buffer);
 
 		if (strcmp(match_path, buffer))
 			return READ_TREE_RECURSIVE;
 
 		if (S_ISDIR(mode)) {
 			state = 1;
 			ls_head();
 			return READ_TREE_RECURSIVE;
 		} else {
 			print_object(sha1, buffer);
 			return 0;
 		}
 	}
 	ls_item(sha1, base, baselen, pathname, mode, stage);
 	return 0;
 }
 
 
 /*
  * Show a tree or a blob
  *   rev:  the commit pointing at the root tree object
  *   path: path to tree or blob
  */
 void cgit_print_tree(const char *rev, char *path)
 {
 	unsigned char sha1[20];
 	struct commit *commit;
 	const char *paths[] = {path, NULL};
 
 	if (!rev)
 		rev = cgit_query_head;
 
 	curr_rev = xstrdup(rev);
 	if (get_sha1(rev, sha1)) {
 		cgit_print_error(fmt("Invalid revision name: %s", rev));
 		return;
 	}
 	commit = lookup_commit_reference(sha1);
 	if (!commit || parse_commit(commit)) {
 		cgit_print_error(fmt("Invalid commit reference: %s", rev));
 		return;
 	}
 
 	html("path: <a href='");
 	html_attr(cgit_pageurl(cgit_query_repo, "tree", fmt("h=%s", rev)));
 	html("'>root</a>");
 
 	if (path == NULL) {