2 files changed, 38 insertions, 22 deletions

diff --git a/src/luarocks/cfg.lua b/src/luarocks/cfg.lua
index 3b7f9c37..e3d6e74b 100644
--- a/src/luarocks/cfg.lua
+++ b/src/luarocks/cfg.lua
@@ -228,17 +228,33 @@ end
 if not site_config.LUAROCKS_FORCE_CONFIG then
   
    home_config_file_default = home_config_dir.."/config-"..cfg.lua_version..".lua"
-   local list = {
-      os.getenv("LUAROCKS_CONFIG_" .. version_suffix) or os.getenv("LUAROCKS_CONFIG"),
-      home_config_file_default,
-      home_config_dir.."/config.lua",
-   }
-   -- first entry might be a silent nil, check and remove if so
-   if not list[1] then table.remove(list, 1) end
    
-   home_config_file = load_config_file(list)
-   home_config_ok = (home_config_file ~= nil)
+   local config_env_var   = "LUAROCKS_CONFIG_" .. version_suffix
+   local config_env_value = os.getenv(config_env_var)
+   if not config_env_value then
+      config_env_var   = "LUAROCKS_CONFIG"
+      config_env_value = os.getenv(config_env_var)
+   end
+   
+   -- first try environment provided file, so we can explicitly warn when it is missing
+   if config_env_value then 
+      local list = { config_env_value }
+      home_config_file = load_config_file(list)
+      home_config_ok = (home_config_file ~= nil)
+      if not home_config_ok then
+         io.stderr:write("Warning: could not load configuration file `"..config_env_value.."` given in environment variable "..config_env_var.."\n")
+      end
+   end
 
+   -- try the alternative defaults if there was no environment specified file or it didn't work
+   if not home_config_ok then
+      local list = {
+         home_config_file_default,
+         home_config_dir.."/config.lua",
+      }
+      home_config_file = load_config_file(list)
+      home_config_ok = (home_config_file ~= nil)
+   end
 end
 
 
@@ -375,7 +391,7 @@ local defaults = {
 }
 
 if cfg.platforms.windows then
-   local full_prefix = (site_config.LUAROCKS_PREFIX or (os.getenv("PROGRAMFILES")..[[\LuaRocks]])).."\\"..cfg.major_version
+   local full_prefix = (site_config.LUAROCKS_PREFIX or (os.getenv("PROGRAMFILES")..[[\LuaRocks]]))
    extra_luarocks_module_dir = full_prefix.."\\lua\\?.lua"
 
    home_config_file = home_config_file and home_config_file:gsub("\\","/")
diff --git a/src/luarocks/tools/patch.lua b/src/luarocks/tools/patch.lua
index b53bad61..debaf636 100644
--- a/src/luarocks/tools/patch.lua
+++ b/src/luarocks/tools/patch.lua
@@ -200,8 +200,13 @@ function patch.read_patch(filename, data)
     if state == 'hunkbody' then
       -- skip hunkskip and hunkbody code until definition of hunkhead read
 
+      if line:match"^[\r\n]*$" then
+          -- prepend space to empty lines to interpret them as context properly
+          line = " " .. line
+      end
+
       -- process line first
-      if line:match"^[- +\\]" or line:match"^[\r\n]*$" then
+      if line:match"^[- +\\]" then
           -- gather stats about line endings
           local he = files.hunkends[nextfileno]
           if endswith(line, "\r\n") then
@@ -455,16 +460,15 @@ local function find_hunks(file, hunks)
 end
 
 local function check_patched(file, hunks)
-  local matched = true
   local lineno = 1
   local ok, err = pcall(function()
     if #file == 0 then
-      error 'nomatch'
+      error('nomatch', 0)
     end
     for hno, h in ipairs(hunks) do
       -- skip to line just before hunk starts
       if #file < h.starttgt then
-         error 'nomatch'
+        error('nomatch', 0)
       end
       lineno = h.starttgt
       for _, hline in ipairs(h.text) do
@@ -473,22 +477,18 @@ local function check_patched(file, hunks)
           local line = file[lineno]
           lineno = lineno + 1
           if #line == 0 then
-            error 'nomatch'
+            error('nomatch', 0)
           end
           if endlstrip(line) ~= endlstrip(hline:sub(2)) then
             warning(format("file is not patched - failed hunk: %d", hno))
-            error 'nomatch'
+            error('nomatch', 0)
           end
         end
       end
     end
   end)
-  if err == 'nomatch' then
-    matched = false
-  end
-    -- todo: display failed hunk, i.e. expected/found
-
-  return matched
+  -- todo: display failed hunk, i.e. expected/found
+  return err ~= 'nomatch'
 end
 
 local function patch_hunks(srcname, tgtname, hunks)