Merge branch 'devel' into gogc

compiler/options.nim

@@ -54,6 +54,7 @@ type                          # please make sure we have under 32 options
     optSkipUserConfigFile,    # skip the users's config file
     optSkipParentConfigFiles, # skip parent dir's config files
     optNoMain,                # do not generate a "main" proc
+    optUseColors,             # use colors for hints, warnings, and errors
     optThreads,               # support for multi-threading
     optStdout,                # output to stdout
     optThreadAnalysis,        # thread analysis pass
@@ -145,6 +146,7 @@ const
 var
   gConfigVars* = newStringTable(modeStyleInsensitive)
   gDllOverrides = newStringTable(modeCaseInsensitive)
+  gPrefixDir* = "" # Overrides the default prefix dir in getPrefixDir proc.
   libpath* = ""
   gProjectName* = "" # holds a name like 'nimrod'
   gProjectPath* = "" # holds a path like /home/alice/projects/nimrod/compiler/
@@ -183,8 +185,13 @@ proc getOutFile*(filename, ext: string): string =
   else: result = changeFileExt(filename, ext)
 
 proc getPrefixDir*(): string =
-  ## gets the application directory
-  result = splitPath(getAppDir()).head
+  ## Gets the prefix dir, usually the parent directory where the binary resides.
+  ##
+  ## This is overrided by some tools (namely nimsuggest) via the ``gPrefixDir``
+  ## global.
+  if gPrefixDir != "": result = gPrefixDir
+  else:
+    result = splitPath(getAppDir()).head
 
 proc canonicalizePath*(path: string): string =
   when not FileSystemCaseSensitive: result = path.expandFilename.toLower