add some wording to soothe users about installing GHC.

radix · radix · commit b7cbd985907f · 2015-08-27T11:54:26.000-05:00
diff --git a/README.md b/README.md
@@ -10,7 +10,7 @@ projects. It is aimed at Haskellers both new and experienced.
 
 It features:
 
-* Installing GHC automatically.
+* Installing GHC automatically, in an isolated location.
 * Installing packages needed for your project.
 * Building your project.
 * Testing your project.
@@ -48,7 +48,8 @@ You may be prompted to run some of the following along the way:
 * `stack init` to create a stack configuration file for an existing project.
   stack will figure out what Stackage release (LTS or nightly) is appropriate
   for the dependencies.
-* `stack setup` to download and install the correct GHC version. (For
+* `stack setup` to download and install the correct GHC version in an isolated
+  location that won't interfere with any system-level installations. (For
   information on installation paths, please use the `stack path` command.)
 
 If you just want to install an executable using stack, then all you have
diff --git a/src/Stack/Setup.hs b/src/Stack/Setup.hs
@@ -610,6 +610,8 @@ downloadAndInstallGHC menv si wanted versionCheck = do
             case platform of
                 Platform _ os | isWindows os -> installGHCWindows
                 _ -> installGHCPosix
+    $logInfo "Preparing to install GHC to an isolated location."
+    $logInfo "This will not interfere with any system-level installation."
     downloadAndInstallTool si downloadInfo $(mkPackageName "ghc") selectedVersion installer
 
 getOSKey :: (MonadReader env m, MonadThrow m, HasConfig env, MonadLogger m, MonadIO m, MonadCatch m, MonadBaseControl IO m)
