Prosody should tell me how to fix dependency problems in a more familiar way for somebody who is not a lua expert

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Delete e.g. lxp extension or export LUA_PATH=""
2. Execute sudo -E prosodyctl start
3. System shows message that lxp is missing

What is the expected output? What do you see instead?

Expected:
**************************
Prosody was unable to find util.hashes
Path that was searched: 
/opt/local/lib/prosody/?.lua;/opt/local/share/luarocks/share/lua/5.1/?.lua;/opt/
local/share/luarocks/share/lua/5.1/?/init.lua;/Users/manuel/.luarocks/share/lua/
5.1/?.lua;/Users/manuel/.luarocks/share/lua/5.1/?/init.lua;/opt/local/share/lua/
5.1//?.lua;/opt/local/share/lua/5.1//?/init.lua;/opt/local/share/lua/5.1/?.lua;/
opt/local/share/lua/5.1/?/init.lua;/opt/local/lib/lua/5.1/?.lua;/opt/local/lib/l
ua/5.1/?/init.lua;
This package can be obtained in the following ways:

    Windows:      Make sure you have hashes.dll from the Prosody distribution in util/
    GNU/Linux:    Run './configure' and 'make' in the Prosody source directory to build util/hashes.so

util.hashes is required for Prosody to run, so we will now exit.
More help can be found on our website, at http://prosody.im/doc/depends
**************************

What version of the product are you using? On what operating system?
Mac OS X 10.10.1 prosody trunk from today

Please provide any additional information below.
I will attach a patch created using the convention from:
http://prosody.im/doc/contribute

Original issue reported on code.google.com by manuel.b...@gmail.com on 7 Dec 2014 at 2:31

[GoogleCodeExporter]

Patch for more extensive error message.

Original comment by manuel.b...@gmail.com on 7 Dec 2014 at 2:37

Attachments:

• prosody-issue453.patch

[GoogleCodeExporter]

Here is a discussion from 4 years ago about a similar problem:

http://www.notadiscussion.com/2009/06/luapath-on-osx.html

Original comment by manuel.b...@gmail.com on 7 Dec 2014 at 2:45

[GoogleCodeExporter]

It might also be enough to tell the user to execute

$ ./prosodyctl about
Prosody hg:f876d7363bdc

# Prosody directories
Data directory:     ./
Plugin directory:   ./
Config directory:   .
Source directory:   .

# Lua environment
Lua version:                Lua 5.1

Lua module search paths:
  /Users/manuel/Projects/video-consult/workspace/prosody-trunk/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?/init.lua
  /Users/manuel/.luarocks/share/lua/5.1/?.lua
  /Users/manuel/.luarocks/share/lua/5.1/?/init.lua
  /opt/local/share/lua/5.1//?.lua
  /opt/local/share/lua/5.1//?/init.lua
  /opt/local/share/lua/5.1/?.lua
  /opt/local/share/lua/5.1/?/init.lua
  /opt/local/lib/lua/5.1/?.lua
  /opt/local/lib/lua/5.1/?/init.lua
  /Users/manuel/Projects/video-consult/workspace/prosody-trunk/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?/init.lua
  /Users/manuel/.luarocks/share/lua/5.1/?.lua
  /Users/manuel/.luarocks/share/lua/5.1/?/init.lua
  /opt/local/share/lua/5.1//?.lua
  /opt/local/share/lua/5.1//?/init.lua
  /opt/local/share/lua/5.1/?.lua
  /opt/local/share/lua/5.1/?/init.lua
  /opt/local/lib/lua/5.1/?.lua
  /opt/local/lib/lua/5.1/?/init.lua
  /Users/manuel/Projects/video-consult/workspace/prosody-trunk/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?/init.lua
  /Users/manuel/.luarocks/share/lua/5.1/?.lua
  /Users/manuel/.luarocks/share/lua/5.1/?/init.lua
  /opt/local/share/lua/5.1//?.lua
  /opt/local/share/lua/5.1//?/init.lua
  /opt/local/share/lua/5.1/?.lua
  /opt/local/share/lua/5.1/?/init.lua
  /opt/local/lib/lua/5.1/?.lua
  /opt/local/lib/lua/5.1/?/init.lua
  /Users/manuel/Projects/video-consult/workspace/prosody-trunk/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?/init.lua
  /Users/manuel/.luarocks/share/lua/5.1/?.lua
  /Users/manuel/.luarocks/share/lua/5.1/?/init.lua
  /opt/local/share/lua/5.1//?.lua
  /opt/local/share/lua/5.1//?/init.lua
  /opt/local/share/lua/5.1/?.lua
  /opt/local/share/lua/5.1/?/init.lua
  /opt/local/lib/lua/5.1/?.lua
  /opt/local/lib/lua/5.1/?/init.lua
  /opt/local/share/luarocks/share/lua/5.1/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?/init.lua
  /Users/manuel/.luarocks/share/lua/5.1/?.lua
  /Users/manuel/.luarocks/share/lua/5.1/?/init.lua
  /opt/local/share/lua/5.1//?.lua
  /opt/local/share/lua/5.1//?/init.lua
  /opt/local/share/lua/5.1/?.lua
  /opt/local/share/lua/5.1/?/init.lua
  /opt/local/lib/lua/5.1/?.lua
  /opt/local/lib/lua/5.1/?/init.lua
  /opt/local/share/luarocks/share/lua/5.1/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?/init.lua
  /Users/manuel/.luarocks/share/lua/5.1/?.lua
  /Users/manuel/.luarocks/share/lua/5.1/?/init.lua
  /opt/local/share/lua/5.1//?.lua
  /opt/local/share/lua/5.1//?/init.lua
  /opt/local/share/lua/5.1/?.lua
  /opt/local/share/lua/5.1/?/init.lua
  /opt/local/lib/lua/5.1/?.lua
  /opt/local/lib/lua/5.1/?/init.lua
  /opt/local/share/luarocks/share/lua/5.1/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?/init.lua
  /Users/manuel/.luarocks/share/lua/5.1/?.lua
  /Users/manuel/.luarocks/share/lua/5.1/?/init.lua
  /opt/local/share/lua/5.1//?.lua
  /opt/local/share/lua/5.1//?/init.lua
  /opt/local/share/lua/5.1/?.lua
  /opt/local/share/lua/5.1/?/init.lua
  /opt/local/lib/lua/5.1/?.lua
  /opt/local/lib/lua/5.1/?/init.lua
  /opt/local/share/luarocks/share/lua/5.1/?.lua
  /opt/local/share/luarocks/share/lua/5.1/?/init.lua
  /Users/manuel/.luarocks/share/lua/5.1/?.lua
  /Users/manuel/.luarocks/share/lua/5.1/?/init.lua
  /opt/local/share/lua/5.1//?.lua
  /opt/local/share/lua/5.1//?/init.lua
  /opt/local/share/lua/5.1/?.lua
  /opt/local/share/lua/5.1/?/init.lua
  /opt/local/lib/lua/5.1/?.lua
  /opt/local/lib/lua/5.1/?/init.lua

Lua C module search paths:
  /Users/manuel/Projects/video-consult/workspace/prosody-trunk/?.so
  /opt/local/share/luarocks/lib/lua/5.1/?.so
  /Users/manuel/.luarocks/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/loadall.so
  /Users/manuel/Projects/video-consult/workspace/prosody-trunk/util/?.so
  /opt/local/share/luarocks/lib/lua/5.1/?.so
  /Users/manuel/.luarocks/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/loadall.so
  /Users/manuel/Projects/video-consult/workspace/prosody-trunk/util/?.so
  /opt/local/share/luarocks/lib/lua/5.1/?.so
  /Users/manuel/.luarocks/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/loadall.so
  /Users/manuel/Projects/video-consult/workspace/prosody-trunk/?.so
  /opt/local/share/luarocks/lib/lua/5.1/?.so
  /Users/manuel/.luarocks/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/loadall.so
  /opt/local/share/luarocks/lib/lua/5.1/?.so
  /Users/manuel/.luarocks/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/loadall.so
  /opt/local/share/luarocks/lib/lua/5.1/?.so
  /Users/manuel/.luarocks/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/loadall.so
  /opt/local/share/luarocks/lib/lua/5.1/?.so
  /Users/manuel/.luarocks/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/loadall.so
  /opt/local/share/luarocks/lib/lua/5.1/?.so
  /Users/manuel/.luarocks/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/?.so
  /opt/local/lib/lua/5.1/loadall.so

LuaRocks:           Not installed

# Lua module versions
lfs:        LuaFileSystem 1.6.2
lxp:        LuaExpat 1.3.0
socket:     LuaSocket 3.0-rc1
ssl:        0.5.PR

Original comment by manuel.b...@gmail.com on 7 Dec 2014 at 3:23