#
#
# add_file "templates/databases.html"
#  content [62aed068c3b9a101c1f473866ee73c81b34e3430]
# 
# patch "handlers.py"
#  from [f5978ee498a2bce37a15bdc0e509e8bb56609e33]
#    to [c4dde78e911e10dd9430967cf4508e2b8656ed06]
# 
# patch "templates/base.html"
#  from [47574ccfc9aff518749857eb878ba93c8f2e9f48]
#    to [7b1b4d764b1c6c17ce021c8f9b973947cded4fcf]
# 
# patch "urls.py"
#  from [74ec1a0af57afeb7d98bcf04248d799b8d9b2738]
#    to [cdd1ef4f53a33f703915f1fa5661a79967268bf1]
# 
# patch "viewmtn.py"
#  from [c5366d46df9e87de6c4357412799dc5220e3a0cc]
#    to [74a4f0416cdabd92532bb1ed2f1a6fbe7f52183f]
#
============================================================
--- templates/databases.html	62aed068c3b9a101c1f473866ee73c81b34e3430
+++ templates/databases.html	62aed068c3b9a101c1f473866ee73c81b34e3430
@@ -0,0 +1,24 @@
+#extends base
+
+#def body
+<p>
+ViewMTN has been configured to serve the following databases. 
+You are currently accessing the database <strong>$(dbname)</strong>.
+Change to a database by accessing the corresponding link.
+</p>
+
+<table class="pretty">
+<tr><th>Database</th><th>Description</th></tr>
+#for db in $databases
+<tr>
+  <td valign="top">
+      <a href="$nodb_join($db.name)/">$db.name</a>
+  </td>
+  <td>
+    $db.description
+  </td>
+</tr>
+#end for
+</table>
+
+#end def
============================================================
--- handlers.py	f5978ee498a2bce37a15bdc0e509e8bb56609e33
+++ handlers.py	c4dde78e911e10dd9430967cf4508e2b8656ed06
@@ -755,6 +755,16 @@ class BranchHead(object):
                         anyhead=anyhead,
                         head_links=head_links)
 
+class Databases(object):
+    def GET(self, ctxt):
+        databases = []
+        for k in ctxt.db_summary:
+            databases.append ({'name':k, 'description':ctxt.db_summary[k]})
+        ctxt.render('databases.html',
+                    page_title="Change database", 
+                    databases=databases)
+                    
+
 class MimeIcon(object):
     def GET(self, type, sub_type):
         if not mimeicon:
@@ -768,12 +778,16 @@ class RobotsTxt(object):
             return web.notfound()
 
 class RobotsTxt(object):
-    def GET(self):
+    def GET(self, ctxt):
         web.header('Content-Type', 'text/plain')
         print "User-agent: *"
-        for revision_page in ['tar', 'downloadfile', 'graph', 'file', 'browse', 'diff', 'info', 'graph']:
-            # the goal is just to let a robot trawl through the most recent changes, and deny access 
-            # to expensive pointless things. We don't want a robot indexing every file in every revision, 
-            # as this is an enormous amount of information.
-            for access_method in ['/revision/', '/branch/head/', '/branch/anyhead/', '/branch/changes/from/', '/json/', '/mimeicon/']:
-                print "Disallow:", access_method + revision_page
+        for dbname in [None] + ctxt.db_summary.keys():
+            for revision_page in ['tar', 'downloadfile', 'graph', 'file', 'browse', 'diff', 'info', 'graph']:
+                # the goal is just to let a robot trawl through the most recent changes, and deny access 
+                # to expensive pointless things. We don't want a robot indexing every file in every revision, 
+                # as this is an enormous amount of information.
+                for access_method in ['/revision/', '/branch/head/', '/branch/anyhead/', '/branch/changes/from/', '/json/', '/mimeicon/']:
+                    disallow = access_method + revision_page
+                    if not dbname is None:
+                        disallow = '/' + dbname + disallow
+                    print "Disallow:", disallow
============================================================
--- templates/base.html	47574ccfc9aff518749857eb878ba93c8f2e9f48
+++ templates/base.html	7b1b4d764b1c6c17ce021c8f9b973947cded4fcf
@@ -24,7 +24,11 @@
   <a href="$perdb_join('')">Branches</a> |
   <a href="$perdb_join('tags')">Tags</a> |
   <a href="$perdb_join('help')">Help</a> |
-  <a href="$perdb_join('about')">About</a><br />
+  <a href="$perdb_join('about')">About</a>
+#if $have_multidb
+  | <a href="$perdb_join('databases')">Change DB</a><br />
+#end if
+  <br/>
 
 #block extramenu
 #end block
============================================================
--- urls.py	74ec1a0af57afeb7d98bcf04248d799b8d9b2738
+++ urls.py	cdd1ef4f53a33f703915f1fa5661a79967268bf1
@@ -15,7 +15,6 @@ common_urls = (
 # as their first argument.
 #
 common_urls = (
-    r'robots.txt', 'RobotsTxt',  ## FIXME needs o exclude per-db paths
     r'mimeicon/([A-Za-z0-9][a-z0-9\-\+\.]*)/([A-Za-z0-9][a-z0-9\-\+\.]*)', 'MimeIcon',
 )
 
@@ -28,7 +27,9 @@ perdb_urls = (
     r'about', 'About',
     r'help', 'Help',
     r'tags', 'Tags',
+    r'databases', 'Databases',
     r'json/([A-Za-z]+)/(.*)', 'Json',
+    r'robots.txt', 'RobotsTxt',  ## FIXME needs o exclude per-db paths
 
     r'revision/browse/('+revision_re+')/(.*)', 'RevisionBrowse',
     r'revision/browse/('+revision_re+')()', 'RevisionBrowse',
============================================================
--- viewmtn.py	c5366d46df9e87de6c4357412799dc5220e3a0cc
+++ viewmtn.py	74a4f0416cdabd92532bb1ed2f1a6fbe7f52183f
@@ -50,6 +50,7 @@ class RequestContextFactory(object):
 class RequestContextFactory(object):
     def __init__ (self):
         self.dbstore = { 'ops' : {}, 'branchdivs' : {}, 'dbdescr' : {}}
+        self.db_summary = {}
         self.default = None
         # has the user specified a dbfiles hash? if so, use it
         if hasattr (config, "dbfiles"):
@@ -57,6 +58,7 @@ class RequestContextFactory(object):
                 self.add_to_store(name, ops=mtn.Operations([config.monotone, dbfile]), 
                                         branchdivs=branchdiv.BranchDivisions(), 
                                         dbdescr=description)
+                self.db_summary[name] = description
             if hasattr (config, "defaultdb"):
                 self.default = config.defaultdb
             have_multidb = True
@@ -84,7 +86,12 @@ class RequestContextFactory(object):
         else:
             dbdescr = self.get_from_store("dbdescr", name)
             branchdivs = self.get_from_store("branchdivs", name)
-            return RequestContext(dbname=name, ops=ops, dbdescr=dbdescr, branchdivs=branchdivs, renderer=self.renderer)
+            return RequestContext(dbname=name,
+                                  ops=ops, 
+                                  dbdescr=dbdescr, 
+                                  branchdivs=branchdivs, 
+                                  renderer=self.renderer, 
+                                  db_summary=self.db_summary)
 
 def runfcgi_apache(func):
     web.wsgi.runfcgi(func, None)