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ui-blame: free read_sha1_file() buffer after use
[cgit.git] / ui-shared.c
diff --git a/ui-shared.c b/ui-shared.c
index 945d560a300780083e9dabc3f024d2a0dc6eaf5d..9d8f66b9fab89ad63e5bfaac22eb6956567f10dd 100644 (file)
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -1,6 +1,6 @@
 /* ui-shared.c: common web output functions
  *
 /* ui-shared.c: common web output functions
  *
- * Copyright (C) 2006 Lars Hjemli
+ * Copyright (C) 2006-2017 cgit Development Team <cgit@lists.zx2c4.com>
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
@@ -11,9 +11,8 @@
 #include "cmd.h"
 #include "html.h"
 
 #include "cmd.h"
 #include "html.h"
 
-const char cgit_doctype[] =
-"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
-"  \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n";
+static const char cgit_doctype[] =
+"<!DOCTYPE html>\n";
 
 static char *http_date(time_t t)
 {
 
 static char *http_date(time_t t)
 {
@@ -28,14 +27,25 @@ static char *http_date(time_t t)
                   tm->tm_hour, tm->tm_min, tm->tm_sec);
 }
 
                   tm->tm_hour, tm->tm_min, tm->tm_sec);
 }
 
-void cgit_print_error(const char *msg)
+void cgit_print_error(const char *fmt, ...)
 {
 {
+       va_list ap;
+       va_start(ap, fmt);
+       cgit_vprint_error(fmt, ap);
+       va_end(ap);
+}
+
+void cgit_vprint_error(const char *fmt, va_list ap)
+{
+       va_list cp;
        html("<div class='error'>");
        html("<div class='error'>");
-       html_txt(msg);
+       va_copy(cp, ap);
+       html_vtxtf(fmt, cp);
+       va_end(cp);
        html("</div>\n");
 }
 
        html("</div>\n");
 }
 
-const char *cgit_httpscheme()
+const char *cgit_httpscheme(void)
 {
        if (ctx.env.https && !strcmp(ctx.env.https, "on"))
                return "https://";
 {
        if (ctx.env.https && !strcmp(ctx.env.https, "on"))
                return "https://";
@@ -43,58 +53,77 @@ const char *cgit_httpscheme()
                return "http://";
 }
 
                return "http://";
 }
 
-const char *cgit_hosturl()
+char *cgit_hosturl(void)
 {
        if (ctx.env.http_host)
 {
        if (ctx.env.http_host)
-               return ctx.env.http_host;
+               return xstrdup(ctx.env.http_host);
        if (!ctx.env.server_name)
                return NULL;
        if (!ctx.env.server_port || atoi(ctx.env.server_port) == 80)
        if (!ctx.env.server_name)
                return NULL;
        if (!ctx.env.server_port || atoi(ctx.env.server_port) == 80)
-               return ctx.env.server_name;
-       return xstrdup(fmt("%s:%s", ctx.env.server_name, ctx.env.server_port));
+               return xstrdup(ctx.env.server_name);
+       return fmtalloc("%s:%s", ctx.env.server_name, ctx.env.server_port);
 }
 
 }
 
-const char *cgit_rooturl()
+char *cgit_currenturl(void)
+{
+       const char *root = cgit_rooturl();
+       size_t len = strlen(root);
+
+       if (!ctx.qry.url)
+               return xstrdup(root);
+       if (len && root[len - 1] == '/')
+               return fmtalloc("%s%s", root, ctx.qry.url);
+       return fmtalloc("%s/%s", root, ctx.qry.url);
+}
+
+const char *cgit_rooturl(void)
 {
        if (ctx.cfg.virtual_root)
 {
        if (ctx.cfg.virtual_root)
-               return fmt("%s/", ctx.cfg.virtual_root);
+               return ctx.cfg.virtual_root;
        else
                return ctx.cfg.script_name;
 }
 
        else
                return ctx.cfg.script_name;
 }
 
+const char *cgit_loginurl(void)
+{
+       static const char *login_url;
+       if (!login_url)
+               login_url = fmtalloc("%s?p=login", cgit_rooturl());
+       return login_url;
+}
+
 char *cgit_repourl(const char *reponame)
 {
 char *cgit_repourl(const char *reponame)
 {
-       if (ctx.cfg.virtual_root) {
-               return fmt("%s/%s/", ctx.cfg.virtual_root, reponame);
-       } else {
-               return fmt("?r=%s", reponame);
-       }
+       if (ctx.cfg.virtual_root)
+               return fmtalloc("%s%s/", ctx.cfg.virtual_root, reponame);
+       else
+               return fmtalloc("?r=%s", reponame);
 }
 
 char *cgit_fileurl(const char *reponame, const char *pagename,
                   const char *filename, const char *query)
 {
 }
 
 char *cgit_fileurl(const char *reponame, const char *pagename,
                   const char *filename, const char *query)
 {
-       char *tmp;
+       struct strbuf sb = STRBUF_INIT;
        char *delim;
 
        if (ctx.cfg.virtual_root) {
        char *delim;
 
        if (ctx.cfg.virtual_root) {
-               tmp = fmt("%s/%s/%s/%s", ctx.cfg.virtual_root, reponame,
-                         pagename, (filename ? filename:""));
+               strbuf_addf(&sb, "%s%s/%s/%s", ctx.cfg.virtual_root, reponame,
+                           pagename, (filename ? filename:""));
                delim = "?";
        } else {
                delim = "?";
        } else {
-               tmp = fmt("?url=%s/%s/%s", reponame, pagename,
-                         (filename ? filename : ""));
+               strbuf_addf(&sb, "?url=%s/%s/%s", reponame, pagename,
+                           (filename ? filename : ""));
                delim = "&amp;";
        }
        if (query)
                delim = "&amp;";
        }
        if (query)
-               tmp = fmt("%s%s%s", tmp, delim, query);
-       return tmp;
+               strbuf_addf(&sb, "%s%s", delim, query);
+       return strbuf_detach(&sb, NULL);
 }
 
 char *cgit_pageurl(const char *reponame, const char *pagename,
                   const char *query)
 {
 }
 
 char *cgit_pageurl(const char *reponame, const char *pagename,
                   const char *query)
 {
-       return cgit_fileurl(reponame, pagename, 0, query);
+       return cgit_fileurl(reponame, pagename, NULL, query);
 }
 
 const char *cgit_repobasename(const char *reponame)
 }
 
 const char *cgit_repobasename(const char *reponame)
@@ -110,7 +139,7 @@ const char *cgit_repobasename(const char *reponame)
        /* strip trailing slashes */
        while (p && rvbuf[p] == '/') rvbuf[p--] = 0;
        /* strip trailing .git */
        /* strip trailing slashes */
        while (p && rvbuf[p] == '/') rvbuf[p--] = 0;
        /* strip trailing .git */
-       if (p >= 3 && !strncmp(&rvbuf[p-3], ".git", 4)) {
+       if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
                p -= 3; rvbuf[p--] = 0;
        }
        /* strip more trailing slashes if any */
                p -= 3; rvbuf[p--] = 0;
        }
        /* strip more trailing slashes if any */
@@ -122,16 +151,17 @@ const char *cgit_repobasename(const char *reponame)
        return rvbuf;
 }
 
        return rvbuf;
 }
 
-static void site_url(const char *page, const char *search, const char *sort, int ofs)
+static void site_url(const char *page, const char *search, const char *sort, int ofs, int always_root)
 {
        char *delim = "?";
 
 {
        char *delim = "?";
 
-       if (ctx.cfg.virtual_root) {
-               html_attr(ctx.cfg.virtual_root);
-               if (ctx.cfg.virtual_root[strlen(ctx.cfg.virtual_root) - 1] != '/')
-                       html("/");
-       } else
-               html(ctx.cfg.script_name);
+       if (always_root || page)
+               html_attr(cgit_rooturl());
+       else {
+               char *currenturl = cgit_currenturl();
+               html_attr(currenturl);
+               free(currenturl);
+       }
 
        if (page) {
                htmlf("?p=%s", page);
 
        if (page) {
                htmlf("?p=%s", page);
@@ -156,7 +186,7 @@ static void site_url(const char *page, const char *search, const char *sort, int
 }
 
 static void site_link(const char *page, const char *name, const char *title,
 }
 
 static void site_link(const char *page, const char *name, const char *title,
-                     const char *class, const char *search, const char *sort, int ofs)
+                     const char *class, const char *search, const char *sort, int ofs, int always_root)
 {
        html("<a");
        if (title) {
 {
        html("<a");
        if (title) {
@@ -170,16 +200,16 @@ static void site_link(const char *page, const char *name, const char *title,
                html("'");
        }
        html(" href='");
                html("'");
        }
        html(" href='");
-       site_url(page, search, sort, ofs);
+       site_url(page, search, sort, ofs, always_root);
        html("'>");
        html_txt(name);
        html("</a>");
 }
 
 void cgit_index_link(const char *name, const char *title, const char *class,
        html("'>");
        html_txt(name);
        html("</a>");
 }
 
 void cgit_index_link(const char *name, const char *title, const char *class,
-                    const char *pattern, const char *sort, int ofs)
+                    const char *pattern, const char *sort, int ofs, int always_root)
 {
 {
-       site_link(NULL, name, title, class, pattern, sort, ofs);
+       site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 }
 
 static char *repolink(const char *title, const char *class, const char *page,
 }
 
 static char *repolink(const char *title, const char *class, const char *page,
@@ -201,8 +231,6 @@ static char *repolink(const char *title, const char *class, const char *page,
        html(" href='");
        if (ctx.cfg.virtual_root) {
                html_url_path(ctx.cfg.virtual_root);
        html(" href='");
        if (ctx.cfg.virtual_root) {
                html_url_path(ctx.cfg.virtual_root);
-               if (ctx.cfg.virtual_root[strlen(ctx.cfg.virtual_root) - 1] != '/')
-                       html("/");
                html_url_path(ctx.repo->url);
                if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
                        html("/");
                html_url_path(ctx.repo->url);
                if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
                        html("/");
@@ -213,7 +241,7 @@ static char *repolink(const char *title, const char *class, const char *page,
                                html_url_path(path);
                }
        } else {
                                html_url_path(path);
                }
        } else {
-               html(ctx.cfg.script_name);
+               html_url_path(ctx.cfg.script_name);
                html("?url=");
                html_url_arg(ctx.repo->url);
                if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
                html("?url=");
                html_url_arg(ctx.repo->url);
                if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
@@ -226,7 +254,7 @@ static char *repolink(const char *title, const char *class, const char *page,
                }
                delim = "&amp;";
        }
                }
                delim = "&amp;";
        }
-       if (head && strcmp(head, ctx.repo->defbranch)) {
+       if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
                html(delim);
                html("h=");
                html_url_arg(head);
                html(delim);
                html("h=");
                html_url_arg(head);
@@ -259,9 +287,9 @@ void cgit_summary_link(const char *name, const char *title, const char *class,
 }
 
 void cgit_tag_link(const char *name, const char *title, const char *class,
 }
 
 void cgit_tag_link(const char *name, const char *title, const char *class,
-                  const char *head, const char *rev)
+                  const char *tag)
 {
 {
-       reporevlink("tag", name, title, class, head, rev, NULL);
+       reporevlink("tag", name, title, class, tag, NULL, NULL);
 }
 
 void cgit_tree_link(const char *name, const char *title, const char *class,
 }
 
 void cgit_tree_link(const char *name, const char *title, const char *class,
@@ -276,9 +304,16 @@ void cgit_plain_link(const char *name, const char *title, const char *class,
        reporevlink("plain", name, title, class, head, rev, path);
 }
 
        reporevlink("plain", name, title, class, head, rev, path);
 }
 
+void cgit_blame_link(const char *name, const char *title, const char *class,
+                    const char *head, const char *rev, const char *path)
+{
+       reporevlink("blame", name, title, class, head, rev, path);
+}
+
 void cgit_log_link(const char *name, const char *title, const char *class,
                   const char *head, const char *rev, const char *path,
 void cgit_log_link(const char *name, const char *title, const char *class,
                   const char *head, const char *rev, const char *path,
-                  int ofs, const char *grep, const char *pattern, int showmsg)
+                  int ofs, const char *grep, const char *pattern, int showmsg,
+                  int follow)
 {
        char *delim;
 
 {
        char *delim;
 
@@ -307,23 +342,20 @@ void cgit_log_link(const char *name, const char *title, const char *class,
        if (showmsg) {
                html(delim);
                html("showmsg=1");
        if (showmsg) {
                html(delim);
                html("showmsg=1");
+               delim = "&amp;";
+       }
+       if (follow) {
+               html(delim);
+               html("follow=1");
        }
        html("'>");
        html_txt(name);
        html("</a>");
 }
 
        }
        html("'>");
        html_txt(name);
        html("</a>");
 }
 
-void cgit_commit_link(char *name, const char *title, const char *class,
-                     const char *head, const char *rev, const char *path,
-                     int toggle_ssdiff)
+void cgit_commit_link(const char *name, const char *title, const char *class,
+                     const char *head, const char *rev, const char *path)
 {
 {
-       if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
-               name[ctx.cfg.max_msg_len] = '\0';
-               name[ctx.cfg.max_msg_len - 1] = '.';
-               name[ctx.cfg.max_msg_len - 2] = '.';
-               name[ctx.cfg.max_msg_len - 3] = '.';
-       }
-
        char *delim;
 
        delim = repolink(title, class, "commit", head, path);
        char *delim;
 
        delim = repolink(title, class, "commit", head, path);
@@ -333,9 +365,9 @@ void cgit_commit_link(char *name, const char *title, const char *class,
                html_url_arg(rev);
                delim = "&amp;";
        }
                html_url_arg(rev);
                delim = "&amp;";
        }
-       if ((ctx.qry.ssdiff && !toggle_ssdiff) || (!ctx.qry.ssdiff && toggle_ssdiff)) {
+       if (ctx.qry.difftype) {
                html(delim);
                html(delim);
-               html("ss=1");
+               htmlf("dt=%d", ctx.qry.difftype);
                delim = "&amp;";
        }
        if (ctx.qry.context > 0 && ctx.qry.context != 3) {
                delim = "&amp;";
        }
        if (ctx.qry.context > 0 && ctx.qry.context != 3) {
@@ -349,10 +381,18 @@ void cgit_commit_link(char *name, const char *title, const char *class,
                html("ignorews=1");
                delim = "&amp;";
        }
                html("ignorews=1");
                delim = "&amp;";
        }
+       if (ctx.qry.follow) {
+               html(delim);
+               html("follow=1");
+       }
        html("'>");
        html("'>");
-       if (name[0] != '\0')
-               html_txt(name);
-       else
+       if (name[0] != '\0') {
+               if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
+                       html_ntxt(name, ctx.cfg.max_msg_len - 3);
+                       html("...");
+               } else
+                       html_txt(name);
+       } else
                html_txt("(no commit message)");
        html("</a>");
 }
                html_txt("(no commit message)");
        html("</a>");
 }
@@ -372,7 +412,7 @@ void cgit_snapshot_link(const char *name, const char *title, const char *class,
 
 void cgit_diff_link(const char *name, const char *title, const char *class,
                    const char *head, const char *new_rev, const char *old_rev,
 
 void cgit_diff_link(const char *name, const char *title, const char *class,
                    const char *head, const char *new_rev, const char *old_rev,
-                   const char *path, int toggle_ssdiff)
+                   const char *path)
 {
        char *delim;
 
 {
        char *delim;
 
@@ -389,9 +429,9 @@ void cgit_diff_link(const char *name, const char *title, const char *class,
                html_url_arg(old_rev);
                delim = "&amp;";
        }
                html_url_arg(old_rev);
                delim = "&amp;";
        }
-       if ((ctx.qry.ssdiff && !toggle_ssdiff) || (!ctx.qry.ssdiff && toggle_ssdiff)) {
+       if (ctx.qry.difftype) {
                html(delim);
                html(delim);
-               html("ss=1");
+               htmlf("dt=%d", ctx.qry.difftype);
                delim = "&amp;";
        }
        if (ctx.qry.context > 0 && ctx.qry.context != 3) {
                delim = "&amp;";
        }
        if (ctx.qry.context > 0 && ctx.qry.context != 3) {
@@ -405,6 +445,10 @@ void cgit_diff_link(const char *name, const char *title, const char *class,
                html("ignorews=1");
                delim = "&amp;";
        }
                html("ignorews=1");
                delim = "&amp;";
        }
+       if (ctx.qry.follow) {
+               html(delim);
+               html("follow=1");
+       }
        html("'>");
        html_txt(name);
        html("</a>");
        html("'>");
        html_txt(name);
        html("</a>");
@@ -422,59 +466,62 @@ void cgit_stats_link(const char *name, const char *title, const char *class,
        reporevlink("stats", name, title, class, head, NULL, path);
 }
 
        reporevlink("stats", name, title, class, head, NULL, path);
 }
 
-static void cgit_self_link(char *name, const char *title, const char *class,
-                          struct cgit_context *ctx)
-{
-       if (!strcmp(ctx->qry.page, "repolist"))
-               cgit_index_link(name, title, class, ctx->qry.search, ctx->qry.sort,
-                               ctx->qry.ofs);
-       else if (!strcmp(ctx->qry.page, "summary"))
-               cgit_summary_link(name, title, class, ctx->qry.head);
-       else if (!strcmp(ctx->qry.page, "tag"))
-               cgit_tag_link(name, title, class, ctx->qry.head,
-                             ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL);
-       else if (!strcmp(ctx->qry.page, "tree"))
-               cgit_tree_link(name, title, class, ctx->qry.head,
-                              ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
-                              ctx->qry.path);
-       else if (!strcmp(ctx->qry.page, "plain"))
-               cgit_plain_link(name, title, class, ctx->qry.head,
-                               ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
-                               ctx->qry.path);
-       else if (!strcmp(ctx->qry.page, "log"))
-               cgit_log_link(name, title, class, ctx->qry.head,
-                             ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
-                             ctx->qry.path, ctx->qry.ofs,
-                             ctx->qry.grep, ctx->qry.search,
-                             ctx->qry.showmsg);
-       else if (!strcmp(ctx->qry.page, "commit"))
-               cgit_commit_link(name, title, class, ctx->qry.head,
-                                ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
-                                ctx->qry.path, 0);
-       else if (!strcmp(ctx->qry.page, "patch"))
-               cgit_patch_link(name, title, class, ctx->qry.head,
-                               ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
-                               ctx->qry.path);
-       else if (!strcmp(ctx->qry.page, "refs"))
-               cgit_refs_link(name, title, class, ctx->qry.head,
-                              ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
-                              ctx->qry.path);
-       else if (!strcmp(ctx->qry.page, "snapshot"))
-               cgit_snapshot_link(name, title, class, ctx->qry.head,
-                                  ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
-                                  ctx->qry.path);
-       else if (!strcmp(ctx->qry.page, "diff"))
-               cgit_diff_link(name, title, class, ctx->qry.head,
-                              ctx->qry.sha1, ctx->qry.sha2,
-                              ctx->qry.path, 0);
-       else if (!strcmp(ctx->qry.page, "stats"))
-               cgit_stats_link(name, title, class, ctx->qry.head,
-                               ctx->qry.path);
+static void cgit_self_link(char *name, const char *title, const char *class)
+{
+       if (!strcmp(ctx.qry.page, "repolist"))
+               cgit_index_link(name, title, class, ctx.qry.search, ctx.qry.sort,
+                               ctx.qry.ofs, 1);
+       else if (!strcmp(ctx.qry.page, "summary"))
+               cgit_summary_link(name, title, class, ctx.qry.head);
+       else if (!strcmp(ctx.qry.page, "tag"))
+               cgit_tag_link(name, title, class, ctx.qry.has_sha1 ?
+                              ctx.qry.sha1 : ctx.qry.head);
+       else if (!strcmp(ctx.qry.page, "tree"))
+               cgit_tree_link(name, title, class, ctx.qry.head,
+                              ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
+                              ctx.qry.path);
+       else if (!strcmp(ctx.qry.page, "plain"))
+               cgit_plain_link(name, title, class, ctx.qry.head,
+                               ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
+                               ctx.qry.path);
+       else if (!strcmp(ctx.qry.page, "blame"))
+               cgit_blame_link(name, title, class, ctx.qry.head,
+                               ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
+                               ctx.qry.path);
+       else if (!strcmp(ctx.qry.page, "log"))
+               cgit_log_link(name, title, class, ctx.qry.head,
+                             ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
+                             ctx.qry.path, ctx.qry.ofs,
+                             ctx.qry.grep, ctx.qry.search,
+                             ctx.qry.showmsg, ctx.qry.follow);
+       else if (!strcmp(ctx.qry.page, "commit"))
+               cgit_commit_link(name, title, class, ctx.qry.head,
+                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
+                                ctx.qry.path);
+       else if (!strcmp(ctx.qry.page, "patch"))
+               cgit_patch_link(name, title, class, ctx.qry.head,
+                               ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
+                               ctx.qry.path);
+       else if (!strcmp(ctx.qry.page, "refs"))
+               cgit_refs_link(name, title, class, ctx.qry.head,
+                              ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
+                              ctx.qry.path);
+       else if (!strcmp(ctx.qry.page, "snapshot"))
+               cgit_snapshot_link(name, title, class, ctx.qry.head,
+                                  ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
+                                  ctx.qry.path);
+       else if (!strcmp(ctx.qry.page, "diff"))
+               cgit_diff_link(name, title, class, ctx.qry.head,
+                              ctx.qry.sha1, ctx.qry.sha2,
+                              ctx.qry.path);
+       else if (!strcmp(ctx.qry.page, "stats"))
+               cgit_stats_link(name, title, class, ctx.qry.head,
+                               ctx.qry.path);
        else {
                /* Don't known how to make link for this page */
        else {
                /* Don't known how to make link for this page */
-               repolink(title, class, ctx->qry.page, ctx->qry.head, ctx->qry.path);
+               repolink(title, class, ctx.qry.page, ctx.qry.head, ctx.qry.path);
                html("><!-- cgit_self_link() doesn't know how to make link for page '");
                html("><!-- cgit_self_link() doesn't know how to make link for page '");
-               html_txt(ctx->qry.page);
+               html_txt(ctx.qry.page);
                html("' -->");
                html_txt(name);
                html("</a>");
                html("' -->");
                html_txt(name);
                html("</a>");
@@ -485,12 +532,12 @@ void cgit_object_link(struct object *obj)
 {
        char *page, *shortrev, *fullrev, *name;
 
 {
        char *page, *shortrev, *fullrev, *name;
 
-       fullrev = sha1_to_hex(obj->sha1);
+       fullrev = oid_to_hex(&obj->oid);
        shortrev = xstrdup(fullrev);
        shortrev[10] = '\0';
        if (obj->type == OBJ_COMMIT) {
                cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
        shortrev = xstrdup(fullrev);
        shortrev[10] = '\0';
        if (obj->type == OBJ_COMMIT) {
                cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
-                                ctx.qry.head, fullrev, NULL, 0);
+                                ctx.qry.head, fullrev, NULL);
                return;
        } else if (obj->type == OBJ_TREE)
                page = "tree";
                return;
        } else if (obj->type == OBJ_TREE)
                page = "tree";
@@ -536,46 +583,54 @@ void cgit_submodule_link(const char *class, char *path, const char *rev)
                        item = lookup_path(list, path);
                }
        }
                        item = lookup_path(list, path);
                }
        }
-       html("<a ");
-       if (class)
-               htmlf("class='%s' ", class);
-       html("href='");
-       if (item) {
-               html_attr(fmt(item->util, rev));
-       } else if (ctx.repo->module_link) {
-               dir = strrchr(path, '/');
-               if (dir)
-                       dir++;
-               else
-                       dir = path;
-               html_attr(fmt(ctx.repo->module_link, dir, rev));
+       if (item || ctx.repo->module_link) {
+               html("<a ");
+               if (class)
+                       htmlf("class='%s' ", class);
+               html("href='");
+               if (item) {
+                       html_attrf(item->util, rev);
+               } else {
+                       dir = strrchr(path, '/');
+                       if (dir)
+                               dir++;
+                       else
+                               dir = path;
+                       html_attrf(ctx.repo->module_link, dir, rev);
+               }
+               html("'>");
+               html_txt(path);
+               html("</a>");
        } else {
        } else {
-               html("#");
+               html("<span");
+               if (class)
+                       htmlf(" class='%s'", class);
+               html(">");
+               html_txt(path);
+               html("</span>");
        }
        }
-       html("'>");
-       html_txt(path);
-       html("</a>");
-       html_txt(fmt(" @ %.7s", rev));
+       html_txtf(" @ %.7s", rev);
        if (item && tail)
                path[len - 1] = tail;
 }
 
        if (item && tail)
                path[len - 1] = tail;
 }
 
-void cgit_print_date(time_t secs, const char *format, int local_time)
+const struct date_mode *cgit_date_mode(enum date_mode_type type)
 {
 {
-       char buf[64];
-       struct tm *time;
+       static struct date_mode mode;
+       mode.type = type;
+       mode.local = ctx.cfg.local_time;
+       return &mode;
+}
 
 
-       if (!secs)
-               return;
-       if (local_time)
-               time = localtime(&secs);
-       else
-               time = gmtime(&secs);
-       strftime(buf, sizeof(buf)-1, format, time);
-       html_txt(buf);
+static void print_rel_date(time_t t, int tz, double value,
+       const char *class, const char *suffix)
+{
+       htmlf("<span class='%s' title='", class);
+       html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
+       htmlf("'>%.0f %s</span>", value, suffix);
 }
 
 }
 
-void cgit_print_age(time_t t, time_t max_relative, const char *format)
+void cgit_print_age(time_t t, int tz, time_t max_relative)
 {
        time_t now, secs;
 
 {
        time_t now, secs;
 
@@ -583,110 +638,142 @@ void cgit_print_age(time_t t, time_t max_relative, const char *format)
                return;
        time(&now);
        secs = now - t;
                return;
        time(&now);
        secs = now - t;
+       if (secs < 0)
+               secs = 0;
 
        if (secs > max_relative && max_relative >= 0) {
 
        if (secs > max_relative && max_relative >= 0) {
-               cgit_print_date(t, format, ctx.cfg.local_time);
+               html("<span title='");
+               html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
+               html("'>");
+               html_txt(show_date(t, tz, cgit_date_mode(DATE_SHORT)));
+               html("</span>");
                return;
        }
 
        if (secs < TM_HOUR * 2) {
                return;
        }
 
        if (secs < TM_HOUR * 2) {
-               htmlf("<span class='age-mins'>%.0f min.</span>",
-                     secs * 1.0 / TM_MIN);
+               print_rel_date(t, tz, secs * 1.0 / TM_MIN, "age-mins", "min.");
                return;
        }
        if (secs < TM_DAY * 2) {
                return;
        }
        if (secs < TM_DAY * 2) {
-               htmlf("<span class='age-hours'>%.0f hours</span>",
-                     secs * 1.0 / TM_HOUR);
+               print_rel_date(t, tz, secs * 1.0 / TM_HOUR, "age-hours", "hours");
                return;
        }
        if (secs < TM_WEEK * 2) {
                return;
        }
        if (secs < TM_WEEK * 2) {
-               htmlf("<span class='age-days'>%.0f days</span>",
-                     secs * 1.0 / TM_DAY);
+               print_rel_date(t, tz, secs * 1.0 / TM_DAY, "age-days", "days");
                return;
        }
        if (secs < TM_MONTH * 2) {
                return;
        }
        if (secs < TM_MONTH * 2) {
-               htmlf("<span class='age-weeks'>%.0f weeks</span>",
-                     secs * 1.0 / TM_WEEK);
+               print_rel_date(t, tz, secs * 1.0 / TM_WEEK, "age-weeks", "weeks");
                return;
        }
        if (secs < TM_YEAR * 2) {
                return;
        }
        if (secs < TM_YEAR * 2) {
-               htmlf("<span class='age-months'>%.0f months</span>",
-                     secs * 1.0 / TM_MONTH);
+               print_rel_date(t, tz, secs * 1.0 / TM_MONTH, "age-months", "months");
                return;
        }
                return;
        }
-       htmlf("<span class='age-years'>%.0f years</span>",
-             secs * 1.0 / TM_YEAR);
+       print_rel_date(t, tz, secs * 1.0 / TM_YEAR, "age-years", "years");
 }
 
 }
 
-void cgit_print_http_headers(struct cgit_context *ctx)
+void cgit_print_http_headers(void)
 {
 {
-       if (ctx->env.no_http && !strcmp(ctx->env.no_http, "1"))
+       if (ctx.env.no_http && !strcmp(ctx.env.no_http, "1"))
                return;
 
                return;
 
-       if (ctx->page.status)
-               htmlf("Status: %d %s\n", ctx->page.status, ctx->page.statusmsg);
-       if (ctx->page.mimetype && ctx->page.charset)
-               htmlf("Content-Type: %s; charset=%s\n", ctx->page.mimetype,
-                     ctx->page.charset);
-       else if (ctx->page.mimetype)
-               htmlf("Content-Type: %s\n", ctx->page.mimetype);
-       if (ctx->page.size)
-               htmlf("Content-Length: %zd\n", ctx->page.size);
-       if (ctx->page.filename)
-               htmlf("Content-Disposition: inline; filename=\"%s\"\n",
-                     ctx->page.filename);
-       htmlf("Last-Modified: %s\n", http_date(ctx->page.modified));
-       htmlf("Expires: %s\n", http_date(ctx->page.expires));
-       if (ctx->page.etag)
-               htmlf("ETag: \"%s\"\n", ctx->page.etag);
+       if (ctx.page.status)
+               htmlf("Status: %d %s\n", ctx.page.status, ctx.page.statusmsg);
+       if (ctx.page.mimetype && ctx.page.charset)
+               htmlf("Content-Type: %s; charset=%s\n", ctx.page.mimetype,
+                     ctx.page.charset);
+       else if (ctx.page.mimetype)
+               htmlf("Content-Type: %s\n", ctx.page.mimetype);
+       if (ctx.page.size)
+               htmlf("Content-Length: %zd\n", ctx.page.size);
+       if (ctx.page.filename) {
+               html("Content-Disposition: inline; filename=\"");
+               html_header_arg_in_quotes(ctx.page.filename);
+               html("\"\n");
+       }
+       if (!ctx.env.authenticated)
+               html("Cache-Control: no-cache, no-store\n");
+       htmlf("Last-Modified: %s\n", http_date(ctx.page.modified));
+       htmlf("Expires: %s\n", http_date(ctx.page.expires));
+       if (ctx.page.etag)
+               htmlf("ETag: \"%s\"\n", ctx.page.etag);
        html("\n");
        html("\n");
-       if (ctx->env.request_method && !strcmp(ctx->env.request_method, "HEAD"))
+       if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
                exit(0);
 }
 
                exit(0);
 }
 
-void cgit_print_docstart(struct cgit_context *ctx)
+void cgit_redirect(const char *url, bool permanent)
+{
+       htmlf("Status: %d %s\n", permanent ? 301 : 302, permanent ? "Moved" : "Found");
+       html("Location: ");
+       html_url_path(url);
+       html("\n\n");
+}
+
+static void print_rel_vcs_link(const char *url)
 {
 {
-       if (ctx->cfg.embedded) {
-               if (ctx->cfg.header)
-                       html_include(ctx->cfg.header);
+       html("<link rel='vcs-git' href='");
+       html_attr(url);
+       html("' title='");
+       html_attr(ctx.repo->name);
+       html(" Git repository'/>\n");
+}
+
+void cgit_print_docstart(void)
+{
+       char *host = cgit_hosturl();
+
+       if (ctx.cfg.embedded) {
+               if (ctx.cfg.header)
+                       html_include(ctx.cfg.header);
                return;
        }
 
                return;
        }
 
-       const char *host = cgit_hosturl();
        html(cgit_doctype);
        html(cgit_doctype);
-       html("<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>\n");
+       html("<html lang='en'>\n");
        html("<head>\n");
        html("<title>");
        html("<head>\n");
        html("<title>");
-       html_txt(ctx->page.title);
+       html_txt(ctx.page.title);
        html("</title>\n");
        htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
        html("</title>\n");
        htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
-       if (ctx->cfg.robots && *ctx->cfg.robots)
-               htmlf("<meta name='robots' content='%s'/>\n", ctx->cfg.robots);
+       if (ctx.cfg.robots && *ctx.cfg.robots)
+               htmlf("<meta name='robots' content='%s'/>\n", ctx.cfg.robots);
        html("<link rel='stylesheet' type='text/css' href='");
        html("<link rel='stylesheet' type='text/css' href='");
-       html_attr(ctx->cfg.css);
+       html_attr(ctx.cfg.css);
        html("'/>\n");
        html("'/>\n");
-       if (ctx->cfg.favicon) {
+       if (ctx.cfg.favicon) {
                html("<link rel='shortcut icon' href='");
                html("<link rel='shortcut icon' href='");
-               html_attr(ctx->cfg.favicon);
+               html_attr(ctx.cfg.favicon);
                html("'/>\n");
        }
                html("'/>\n");
        }
-       if (host && ctx->repo && ctx->qry.head) {
+       if (host && ctx.repo && ctx.qry.head) {
+               char *fileurl;
+               struct strbuf sb = STRBUF_INIT;
+               strbuf_addf(&sb, "h=%s", ctx.qry.head);
+
                html("<link rel='alternate' title='Atom feed' href='");
                html(cgit_httpscheme());
                html("<link rel='alternate' title='Atom feed' href='");
                html(cgit_httpscheme());
-               html_attr(cgit_hosturl());
-               html_attr(cgit_fileurl(ctx->repo->url, "atom", ctx->qry.vpath,
-                                      fmt("h=%s", ctx->qry.head)));
+               html_attr(host);
+               fileurl = cgit_fileurl(ctx.repo->url, "atom", ctx.qry.vpath,
+                                      sb.buf);
+               html_attr(fileurl);
                html("' type='application/atom+xml'/>\n");
                html("' type='application/atom+xml'/>\n");
+               strbuf_release(&sb);
+               free(fileurl);
        }
        }
-       if (ctx->cfg.head_include)
-               html_include(ctx->cfg.head_include);
+       if (ctx.repo)
+               cgit_add_clone_urls(print_rel_vcs_link);
+       if (ctx.cfg.head_include)
+               html_include(ctx.cfg.head_include);
        html("</head>\n");
        html("<body>\n");
        html("</head>\n");
        html("<body>\n");
-       if (ctx->cfg.header)
-               html_include(ctx->cfg.header);
+       if (ctx.cfg.header)
+               html_include(ctx.cfg.header);
+       free(host);
 }
 
 }
 
-void cgit_print_docend()
+void cgit_print_docend(void)
 {
        html("</div> <!-- class=content -->\n");
        if (ctx.cfg.embedded) {
 {
        html("</div> <!-- class=content -->\n");
        if (ctx.cfg.embedded) {
@@ -698,16 +785,66 @@ void cgit_print_docend()
        if (ctx.cfg.footer)
                html_include(ctx.cfg.footer);
        else {
        if (ctx.cfg.footer)
                html_include(ctx.cfg.footer);
        else {
-               htmlf("<div class='footer'>generated  by cgit %s at ",
+               htmlf("<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit %s</a> at ",
                        cgit_version);
                        cgit_version);
-               cgit_print_date(time(NULL), FMT_LONGDATE, ctx.cfg.local_time);
+               html_txt(show_date(time(NULL), 0, cgit_date_mode(DATE_ISO8601)));
                html("</div>\n");
        }
        html("</div> <!-- id=cgit -->\n");
        html("</body>\n</html>\n");
 }
 
                html("</div>\n");
        }
        html("</div> <!-- id=cgit -->\n");
        html("</body>\n</html>\n");
 }
 
-static int print_branch_option(const char *refname, const unsigned char *sha1,
+void cgit_print_error_page(int code, const char *msg, const char *fmt, ...)
+{
+       va_list ap;
+       ctx.page.expires = ctx.cfg.cache_dynamic_ttl;
+       ctx.page.status = code;
+       ctx.page.statusmsg = msg;
+       cgit_print_layout_start();
+       va_start(ap, fmt);
+       cgit_vprint_error(fmt, ap);
+       va_end(ap);
+       cgit_print_layout_end();
+}
+
+void cgit_print_layout_start(void)
+{
+       cgit_print_http_headers();
+       cgit_print_docstart();
+       cgit_print_pageheader();
+}
+
+void cgit_print_layout_end(void)
+{
+       cgit_print_docend();
+}
+
+static void add_clone_urls(void (*fn)(const char *), char *txt, char *suffix)
+{
+       struct strbuf **url_list = strbuf_split_str(txt, ' ', 0);
+       int i;
+
+       for (i = 0; url_list[i]; i++) {
+               strbuf_rtrim(url_list[i]);
+               if (url_list[i]->len == 0)
+                       continue;
+               if (suffix && *suffix)
+                       strbuf_addf(url_list[i], "/%s", suffix);
+               fn(url_list[i]->buf);
+       }
+
+       strbuf_list_free(url_list);
+}
+
+void cgit_add_clone_urls(void (*fn)(const char *))
+{
+       if (ctx.repo->clone_url)
+               add_clone_urls(fn, expand_macros(ctx.repo->clone_url), NULL);
+       else if (ctx.cfg.clone_prefix)
+               add_clone_urls(fn, ctx.cfg.clone_prefix, ctx.repo->url);
+}
+
+static int print_branch_option(const char *refname, const struct object_id *oid,
                               int flags, void *cb_data)
 {
        char *name = (char *)refname;
                               int flags, void *cb_data)
 {
        char *name = (char *)refname;
@@ -718,13 +855,14 @@ static int print_branch_option(const char *refname, const unsigned char *sha1,
 void cgit_add_hidden_formfields(int incl_head, int incl_search,
                                const char *page)
 {
 void cgit_add_hidden_formfields(int incl_head, int incl_search,
                                const char *page)
 {
-       char *url;
-
        if (!ctx.cfg.virtual_root) {
        if (!ctx.cfg.virtual_root) {
-               url = fmt("%s/%s", ctx.qry.repo, page);
+               struct strbuf url = STRBUF_INIT;
+
+               strbuf_addf(&url, "%s/%s", ctx.qry.repo, page);
                if (ctx.qry.vpath)
                if (ctx.qry.vpath)
-                       url = fmt("%s/%s", url, ctx.qry.vpath);
-               html_hidden("url", url);
+                       strbuf_addf(&url, "/%s", ctx.qry.vpath);
+               html_hidden("url", url.buf);
+               strbuf_release(&url);
        }
 
        if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
        }
 
        if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
@@ -746,47 +884,50 @@ void cgit_add_hidden_formfields(int incl_head, int incl_search,
        }
 }
 
        }
 }
 
-static const char *hc(struct cgit_context *ctx, const char *page)
+static const char *hc(const char *page)
 {
 {
-       return strcmp(ctx->qry.page, page) ? NULL : "active";
+       if (!ctx.qry.page)
+               return NULL;
+
+       return strcmp(ctx.qry.page, page) ? NULL : "active";
 }
 
 }
 
-static void cgit_print_path_crumbs(struct cgit_context *ctx, char *path)
+static void cgit_print_path_crumbs(char *path)
 {
 {
-       char *old_path = ctx->qry.path;
+       char *old_path = ctx.qry.path;
        char *p = path, *q, *end = path + strlen(path);
 
        char *p = path, *q, *end = path + strlen(path);
 
-       ctx->qry.path = NULL;
-       cgit_self_link("root", NULL, NULL, ctx);
-       ctx->qry.path = p = path;
+       ctx.qry.path = NULL;
+       cgit_self_link("root", NULL, NULL);
+       ctx.qry.path = p = path;
        while (p < end) {
                if (!(q = strchr(p, '/')))
                        q = end;
                *q = '\0';
                html_txt("/");
        while (p < end) {
                if (!(q = strchr(p, '/')))
                        q = end;
                *q = '\0';
                html_txt("/");
-               cgit_self_link(p, NULL, NULL, ctx);
+               cgit_self_link(p, NULL, NULL);
                if (q < end)
                        *q = '/';
                p = q + 1;
        }
                if (q < end)
                        *q = '/';
                p = q + 1;
        }
-       ctx->qry.path = old_path;
+       ctx.qry.path = old_path;
 }
 
 }
 
-static void print_header(struct cgit_context *ctx)
+static void print_header(void)
 {
        char *logo = NULL, *logo_link = NULL;
 
        html("<table id='header'>\n");
        html("<tr>\n");
 
 {
        char *logo = NULL, *logo_link = NULL;
 
        html("<table id='header'>\n");
        html("<tr>\n");
 
-       if (ctx->repo && ctx->repo->logo && *ctx->repo->logo)
-               logo = ctx->repo->logo;
+       if (ctx.repo && ctx.repo->logo && *ctx.repo->logo)
+               logo = ctx.repo->logo;
        else
        else
-               logo = ctx->cfg.logo;
-       if (ctx->repo && ctx->repo->logo_link && *ctx->repo->logo_link)
-               logo_link = ctx->repo->logo_link;
+               logo = ctx.cfg.logo;
+       if (ctx.repo && ctx.repo->logo_link && *ctx.repo->logo_link)
+               logo_link = ctx.repo->logo_link;
        else
        else
-               logo_link = ctx->cfg.logo_link;
+               logo_link = ctx.cfg.logo_link;
        if (logo && *logo) {
                html("<td class='logo' rowspan='2'><a href='");
                if (logo_link && *logo_link)
        if (logo && *logo) {
                html("<td class='logo' rowspan='2'><a href='");
                if (logo_link && *logo_link)
@@ -799,102 +940,128 @@ static void print_header(struct cgit_context *ctx)
        }
 
        html("<td class='main'>");
        }
 
        html("<td class='main'>");
-       if (ctx->repo) {
-               cgit_index_link("index", NULL, NULL, NULL, NULL, 0);
+       if (ctx.repo) {
+               cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
                html(" : ");
                html(" : ");
-               cgit_summary_link(ctx->repo->name, ctx->repo->name, NULL, NULL);
-               html("</td><td class='form'>");
-               html("<form method='get' action=''>\n");
-               cgit_add_hidden_formfields(0, 1, ctx->qry.page);
-               html("<select name='h' onchange='this.form.submit();'>\n");
-               for_each_branch_ref(print_branch_option, ctx->qry.head);
-               html("</select> ");
-               html("<input type='submit' name='' value='switch'/>");
-               html("</form>");
+               cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
+               if (ctx.env.authenticated) {
+                       html("</td><td class='form'>");
+                       html("<form method='get'>\n");
+                       cgit_add_hidden_formfields(0, 1, ctx.qry.page);
+                       html("<select name='h' onchange='this.form.submit();'>\n");
+                       for_each_branch_ref(print_branch_option, ctx.qry.head);
+                       if (ctx.repo->enable_remote_branches)
+                               for_each_remote_ref(print_branch_option, ctx.qry.head);
+                       html("</select> ");
+                       html("<input type='submit' value='switch'/>");
+                       html("</form>");
+               }
        } else
        } else
-               html_txt(ctx->cfg.root_title);
+               html_txt(ctx.cfg.root_title);
        html("</td></tr>\n");
 
        html("<tr><td class='sub'>");
        html("</td></tr>\n");
 
        html("<tr><td class='sub'>");
-       if (ctx->repo) {
-               html_txt(ctx->repo->desc);
+       if (ctx.repo) {
+               html_txt(ctx.repo->desc);
                html("</td><td class='sub right'>");
                html("</td><td class='sub right'>");
-               html_txt(ctx->repo->owner);
+               html_txt(ctx.repo->owner);
        } else {
        } else {
-               if (ctx->cfg.root_desc)
-                       html_txt(ctx->cfg.root_desc);
-               else if (ctx->cfg.index_info)
-                       html_include(ctx->cfg.index_info);
+               if (ctx.cfg.root_desc)
+                       html_txt(ctx.cfg.root_desc);
+               else if (ctx.cfg.index_info)
+                       html_include(ctx.cfg.index_info);
        }
        html("</td></tr></table>\n");
 }
 
        }
        html("</td></tr></table>\n");
 }
 
-void cgit_print_pageheader(struct cgit_context *ctx)
+void cgit_print_pageheader(void)
 {
        html("<div id='cgit'>");
 {
        html("<div id='cgit'>");
-       if (!ctx->cfg.noheader)
-               print_header(ctx);
+       if (!ctx.env.authenticated || !ctx.cfg.noheader)
+               print_header();
 
        html("<table class='tabs'><tr><td>\n");
 
        html("<table class='tabs'><tr><td>\n");
-       if (ctx->repo) {
-               cgit_summary_link("summary", NULL, hc(ctx, "summary"),
-                                 ctx->qry.head);
-               cgit_refs_link("refs", NULL, hc(ctx, "refs"), ctx->qry.head,
-                              ctx->qry.sha1, NULL);
-               cgit_log_link("log", NULL, hc(ctx, "log"), ctx->qry.head,
-                             NULL, ctx->qry.vpath, 0, NULL, NULL,
-                             ctx->qry.showmsg);
-               cgit_tree_link("tree", NULL, hc(ctx, "tree"), ctx->qry.head,
-                              ctx->qry.sha1, ctx->qry.vpath);
-               cgit_commit_link("commit", NULL, hc(ctx, "commit"),
-                                ctx->qry.head, ctx->qry.sha1, ctx->qry.vpath, 0);
-               cgit_diff_link("diff", NULL, hc(ctx, "diff"), ctx->qry.head,
-                              ctx->qry.sha1, ctx->qry.sha2, ctx->qry.vpath, 0);
-               if (ctx->repo->max_stats)
-                       cgit_stats_link("stats", NULL, hc(ctx, "stats"),
-                                       ctx->qry.head, ctx->qry.vpath);
-               if (ctx->repo->readme)
+       if (ctx.env.authenticated && ctx.repo) {
+               if (ctx.repo->readme.nr)
                        reporevlink("about", "about", NULL,
                        reporevlink("about", "about", NULL,
-                                   hc(ctx, "about"), ctx->qry.head, NULL,
+                                   hc("about"), ctx.qry.head, NULL,
                                    NULL);
                                    NULL);
+               cgit_summary_link("summary", NULL, hc("summary"),
+                                 ctx.qry.head);
+               cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
+                              ctx.qry.sha1, NULL);
+               cgit_log_link("log", NULL, hc("log"), ctx.qry.head,
+                             NULL, ctx.qry.vpath, 0, NULL, NULL,
+                             ctx.qry.showmsg, ctx.qry.follow);
+               if (ctx.qry.page && !strcmp(ctx.qry.page, "blame"))
+                       cgit_blame_link("blame", NULL, hc("blame"), ctx.qry.head,
+                                       ctx.qry.sha1, ctx.qry.vpath);
+               else
+                       cgit_tree_link("tree", NULL, hc("tree"), ctx.qry.head,
+                                      ctx.qry.sha1, ctx.qry.vpath);
+               cgit_commit_link("commit", NULL, hc("commit"),
+                                ctx.qry.head, ctx.qry.sha1, ctx.qry.vpath);
+               cgit_diff_link("diff", NULL, hc("diff"), ctx.qry.head,
+                              ctx.qry.sha1, ctx.qry.sha2, ctx.qry.vpath);
+               if (ctx.repo->max_stats)
+                       cgit_stats_link("stats", NULL, hc("stats"),
+                                       ctx.qry.head, ctx.qry.vpath);
+               if (ctx.repo->homepage) {
+                       html("<a href='");
+                       html_attr(ctx.repo->homepage);
+                       html("'>homepage</a>");
+               }
                html("</td><td class='form'>");
                html("<form class='right' method='get' action='");
                html("</td><td class='form'>");
                html("<form class='right' method='get' action='");
-               if (ctx->cfg.virtual_root)
-                       html_url_path(cgit_fileurl(ctx->qry.repo, "log",
-                                                  ctx->qry.vpath, NULL));
+               if (ctx.cfg.virtual_root) {
+                       char *fileurl = cgit_fileurl(ctx.qry.repo, "log",
+                                                  ctx.qry.vpath, NULL);
+                       html_url_path(fileurl);
+                       free(fileurl);
+               }
                html("'>\n");
                cgit_add_hidden_formfields(1, 0, "log");
                html("<select name='qt'>\n");
                html("'>\n");
                cgit_add_hidden_formfields(1, 0, "log");
                html("<select name='qt'>\n");
-               html_option("grep", "log msg", ctx->qry.grep);
-               html_option("author", "author", ctx->qry.grep);
-               html_option("committer", "committer", ctx->qry.grep);
-               html_option("range", "range", ctx->qry.grep);
+               html_option("grep", "log msg", ctx.qry.grep);
+               html_option("author", "author", ctx.qry.grep);
+               html_option("committer", "committer", ctx.qry.grep);
+               html_option("range", "range", ctx.qry.grep);
                html("</select>\n");
                html("</select>\n");
-               html("<input class='txt' type='text' size='10' name='q' value='");
-               html_attr(ctx->qry.search);
+               html("<input class='txt' type='search' size='10' name='q' value='");
+               html_attr(ctx.qry.search);
                html("'/>\n");
                html("<input type='submit' value='search'/>\n");
                html("</form>\n");
                html("'/>\n");
                html("<input type='submit' value='search'/>\n");
                html("</form>\n");
-       } else {
-               site_link(NULL, "index", NULL, hc(ctx, "repolist"), NULL, NULL, 0);
-               if (ctx->cfg.root_readme)
-                       site_link("about", "about", NULL, hc(ctx, "about"),
-                                 NULL, NULL, 0);
+       } else if (ctx.env.authenticated) {
+               char *currenturl = cgit_currenturl();
+               site_link(NULL, "index", NULL, hc("repolist"), NULL, NULL, 0, 1);
+               if (ctx.cfg.root_readme)
+                       site_link("about", "about", NULL, hc("about"),
+                                 NULL, NULL, 0, 1);
                html("</td><td class='form'>");
                html("<form method='get' action='");
                html("</td><td class='form'>");
                html("<form method='get' action='");
-               html_attr(cgit_rooturl());
+               html_attr(currenturl);
                html("'>\n");
                html("'>\n");
-               html("<input type='text' name='q' size='10' value='");
-               html_attr(ctx->qry.search);
+               html("<input type='search' name='q' size='10' value='");
+               html_attr(ctx.qry.search);
                html("'/>\n");
                html("<input type='submit' value='search'/>\n");
                html("</form>");
                html("'/>\n");
                html("<input type='submit' value='search'/>\n");
                html("</form>");
+               free(currenturl);
        }
        html("</td></tr></table>\n");
        }
        html("</td></tr></table>\n");
-       if (ctx->qry.vpath) {
+       if (ctx.env.authenticated && ctx.repo && ctx.qry.vpath) {
                html("<div class='path'>");
                html("path: ");
                html("<div class='path'>");
                html("path: ");
-               cgit_print_path_crumbs(ctx, ctx->qry.vpath);
+               cgit_print_path_crumbs(ctx.qry.vpath);
+               if (ctx.cfg.enable_follow_links && !strcmp(ctx.qry.page, "log")) {
+                       html(" (");
+                       ctx.qry.follow = !ctx.qry.follow;
+                       cgit_self_link(ctx.qry.follow ? "follow" : "unfollow",
+                                       NULL, NULL);
+                       ctx.qry.follow = !ctx.qry.follow;
+                       html(")");
+               }
                html("</div>");
        }
        html("<div class='content'>");
                html("</div>");
        }
        html("<div class='content'>");
@@ -915,24 +1082,74 @@ void cgit_print_filemode(unsigned short mode)
        html_fileperm(mode);
 }
 
        html_fileperm(mode);
 }
 
+void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
+                                 const char *ref)
+{
+       struct object_id oid;
+
+       /*
+        * Prettify snapshot names by stripping leading "v" or "V" if the tag
+        * name starts with {v,V}[0-9] and the prettify mapping is injective,
+        * i.e. each stripped tag can be inverted without ambiguities.
+        */
+       if (get_oid(fmt("refs/tags/%s", ref), &oid) == 0 &&
+           (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
+           ((get_oid(fmt("refs/tags/%s", ref + 1), &oid) == 0) +
+            (get_oid(fmt("refs/tags/v%s", ref + 1), &oid) == 0) +
+            (get_oid(fmt("refs/tags/V%s", ref + 1), &oid) == 0) == 1))
+               ref++;
+
+       strbuf_addf(filename, "%s-%s", base, ref);
+}
+
 void cgit_print_snapshot_links(const char *repo, const char *head,
                               const char *hex, int snapshots)
 {
        const struct cgit_snapshot_format* f;
 void cgit_print_snapshot_links(const char *repo, const char *head,
                               const char *hex, int snapshots)
 {
        const struct cgit_snapshot_format* f;
-       char *prefix;
-       char *filename;
-       unsigned char sha1[20];
-
-       if (get_sha1(fmt("refs/tags/%s", hex), sha1) == 0 &&
-           (hex[0] == 'v' || hex[0] == 'V') && isdigit(hex[1]))
-               hex++;
-       prefix = xstrdup(fmt("%s-%s", cgit_repobasename(repo), hex));
+       struct strbuf filename = STRBUF_INIT;
+       size_t prefixlen;
+
+       cgit_compose_snapshot_prefix(&filename, cgit_repobasename(repo), hex);
+       prefixlen = filename.len;
        for (f = cgit_snapshot_formats; f->suffix; f++) {
                if (!(snapshots & f->bit))
                        continue;
        for (f = cgit_snapshot_formats; f->suffix; f++) {
                if (!(snapshots & f->bit))
                        continue;
-               filename = fmt("%s%s", prefix, f->suffix);
-               cgit_snapshot_link(filename, NULL, NULL, NULL, NULL, filename);
+               strbuf_setlen(&filename, prefixlen);
+               strbuf_addstr(&filename, f->suffix);
+               cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL,
+                                  filename.buf);
                html("<br/>");
        }
                html("<br/>");
        }
-       free(prefix);
+       strbuf_release(&filename);
+}
+
+void cgit_set_title_from_path(const char *path)
+{
+       size_t path_len, path_index, path_last_end;
+       char *new_title;
+
+       if (!path)
+               return;
+
+       path_len = strlen(path);
+       new_title = xmalloc(path_len + 3 + strlen(ctx.page.title) + 1);
+       new_title[0] = '\0';
+
+       for (path_index = path_len, path_last_end = path_len; path_index-- > 0;) {
+               if (path[path_index] == '/') {
+                       if (path_index == path_len - 1) {
+                               path_last_end = path_index - 1;
+                               continue;
+                       }
+                       strncat(new_title, &path[path_index + 1], path_last_end - path_index - 1);
+                       strcat(new_title, "\\");
+                       path_last_end = path_index;
+               }
+       }
+       if (path_last_end)
+               strncat(new_title, path, path_last_end);
+
+       strcat(new_title, " - ");
+       strcat(new_title, ctx.page.title);
+       ctx.page.title = new_title;
 }
 }
A hyperfast web frontend for git repositories written in C.