# 
# patch "ChangeLog"
#  from [7bfe89370da9649f8bd5a0dc518a65cf3d148e72]
#    to [22c31e72a7a1fcd26f530206819b9e8baa8d3af6]
# 
# patch "app_state.cc"
#  from [34d5aae11fc52ae3b384e3b0450bc9f314413fd5]
#    to [843ebcf38ec1ce9d803a7317695f8bfc1db72b7a]
# 
# patch "app_state.hh"
#  from [687cd3f0e9ff0229173f5b0815f28056f1068b65]
#    to [ad40f04b056e67723f755a752d17e0ab7107dac4]
# 
# patch "commands.cc"
#  from [c19d66fa4ae9d7fe6236b91707f8cc665557ccba]
#    to [668364db356c8b18906474160174ee9b30d7d699]
# 
--- ChangeLog
+++ ChangeLog
@@ -1,5 +1,12 @@
 2005-07-16  Nathaniel Smith  <address@hidden>
 
+	* app_state.{cc,hh} (require_working_copy): Take an optional
+	argument to give more details about why a working copy was
+	required.
+	* commands.cc (log): Give said details.
+
+2005-07-16  Nathaniel Smith  <address@hidden>
+
 	* monotone.texi (CVS Phrasebook): Include 'log'.
 
 2005-07-16  Nathaniel Smith  <address@hidden>
--- app_state.cc
+++ app_state.cc
@@ -86,9 +86,11 @@
 }
 
 void 
-app_state::require_working_copy()
+app_state::require_working_copy(std::string const & explanation)
 {
-  N(found_working_copy, F("working copy directory required but not found"));
+  N(found_working_copy,
+    F("working copy directory required but not found%s%s")
+    % (explanation ? "\n" : "") % explanation);
   write_options();
 }
 
--- app_state.hh
+++ app_state.hh
@@ -52,7 +52,7 @@
   fs::path pidfile;
 
   void allow_working_copy();
-  void require_working_copy();
+  void require_working_copy(std::string const & explanation = "");
   void create_working_copy(std::string const & dir);
 
   file_path prefix(utf8 const & path);
--- commands.cc
+++ commands.cc
@@ -3601,7 +3601,7 @@
   file_path file;
 
   if (app.revision_selectors.size() == 0)
-    app.require_working_copy();
+    app.require_working_copy("try passing a --revision to start at");
 
   if (args.size() > 1)
     throw usage(name);