Explicitly set local encoding to UTF-8 in site.hs (#255)

This change makes sure that the site executable *always* expects UTF-8, regardless of any locale environment variables. This should avoid problems like #29 and #249 in a more robust way than trying to set the right environment variables in `buildAndWatch` or `shell.nix`.

The diff ended up a bit noisy because of indentation changes; the key change was adding `Encoding.setLocaleEncoding Encoding.utf8` to the beginning of `main`.

I tested this by reproducing the Unicode error (using `nix-shell --pure`) and checking that the Haskell code change fixes the problem.

buildAndWatch

@@ -12,7 +12,6 @@ function buildAndWatchWithNix() {
         exit 1
     fi
 
-    export LC_ALL=C.UTF-8       # fix locale error with Hakyll (see #29)
     nix-build -A builder && \
         ./result/bin/haskell-org-site clean && \
         ./result/bin/haskell-org-site build && \

builder/site.hs

@@ -1,68 +1,71 @@
 --------------------------------------------------------------------------------
-{-# LANGUAGE TypeApplications #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TypeApplications  #-}
 import           Data.Aeson
 import qualified Data.ByteString.Lazy          as BL
 import           Data.Monoid                   ((<>))
 import           Data.Time.Calendar
 import           Data.Time.Clock
+import qualified GHC.IO.Encoding               as Encoding
 import           Hakyll
 import           Hakyll.Core.Compiler
 import           Hakyll.Core.Compiler.Internal
 import           Hakyll.Core.Provider
 import           System.FilePath.Posix
 import           Testimonial
 
-
 --------------------------------------------------------------------------------
 main :: IO ()
-main = mkContext >>= \ctx -> hakyllWith configuration $ do
-  match "testimonials/logos/*" $ do
-    route idRoute
-    compile copyFileCompiler
-
-  match "testimonials/*.yaml" $ do
-    compile parseTestimonialCompiler
-
-  create ["testimonials.json"] $ do
-    route idRoute
-    compile $ do
-      testimonials <- loadAll @Testimonial "testimonials/*.yaml"
-      item <- (makeItem . BL.unpack . encode . map itemBody) testimonials
-      saveSnapshot "_final" item
-      pure item
-
-  match "img/*" $ do
-    route   idRoute
-    compile copyFileCompiler
-
-  match "css/*" $ do
-    route   idRoute
-    compile compressCssCompiler
-
-  match "js/*" $ do
-    route   idRoute
-    compile copyFileCompiler
-
-  match "index.html" $ do
-    route idRoute
-    compile $ do
-      testimonials <- loadAll @Testimonial "testimonials/*.yaml"
-      let
-        indexCtx = listField "testimonials" testimonialContext (pure testimonials) `mappend`
-                   ctx
-      defCompiler indexCtx
-
-  match ("**/*.markdown" .||. "*.markdown") $ do
-    route cleanRoute
-    compile $ mdCompiler ctx
-
-  match "*.pdf" $ do
-    route   idRoute
-    compile copyFileCompiler
-
-  match "templates/*" $
-    compile templateCompiler
+main = do
+  Encoding.setLocaleEncoding Encoding.utf8
+  ctx <- mkContext
+  hakyllWith configuration $ do
+    match "testimonials/logos/*" $ do
+      route idRoute
+      compile copyFileCompiler
+
+    match "testimonials/*.yaml" $ do
+      compile parseTestimonialCompiler
+
+    create ["testimonials.json"] $ do
+      route idRoute
+      compile $ do
+        testimonials <- loadAll @Testimonial "testimonials/*.yaml"
+        item <- (makeItem . BL.unpack . encode . map itemBody) testimonials
+        saveSnapshot "_final" item
+        pure item
+
+    match "img/*" $ do
+      route   idRoute
+      compile copyFileCompiler
+
+    match "css/*" $ do
+      route   idRoute
+      compile compressCssCompiler
+
+    match "js/*" $ do
+      route   idRoute
+      compile copyFileCompiler
+
+    match "index.html" $ do
+      route idRoute
+      compile $ do
+        testimonials <- loadAll @Testimonial "testimonials/*.yaml"
+        let
+          indexCtx = listField "testimonials" testimonialContext (pure testimonials) `mappend`
+                     ctx
+        defCompiler indexCtx
+
+    match ("**/*.markdown" .||. "*.markdown") $ do
+      route cleanRoute
+      compile $ mdCompiler ctx
+
+    match "*.pdf" $ do
+      route   idRoute
+      compile copyFileCompiler
+
+    match "templates/*" $
+      compile templateCompiler
 
 
 configuration :: Configuration

default.nix

@@ -18,9 +18,6 @@ let
       ] ./.;
     buildInputs = [ builder pkgs.linkchecker ];
 
-    LOCALE_ARCHIVE = "${pkgs.glibcLocales}/lib/locale/locale-archive";
-    LC_ALL = "C.UTF-8";
-
     buildPhase = ''
       ${builder}/bin/haskell-org-site build
     '';