tools: hakyll isn't in lts 7, use nightly for hakyll-std

Also compile it when run interpreted.

Makefile

@@ -875,7 +875,7 @@ hakyll-std site/hakyll-std/hakyll-std: \
 	site/hakyll-std/hakyll-std.hs \
 	site/hakyll-std/TableOfContents.hs \
 		$(call def-help,hakyll-std, build a generic hakyll site builder script )
-	cd site/hakyll-std; ./hakyll-std.hs >/dev/null && stack ghc hakyll-std.hs
+	cd site/hakyll-std; ./hakyll-std.hs
 
 site-build: site/hakyll-std/hakyll-std site/manual.md \
 	$(call def-help,site-build, generate the hledger.org website with hakyll-std )

Shake.hs

@@ -264,19 +264,14 @@ main = do
     hakyllstd %> \out -> do
       let dir = takeDirectory out
       need [out <.> "hs", dir </> "TableOfContents.hs"] -- XXX hard-coded dep
-      -- install libs via shebang line
-      -- XXX 2016/10/29 why has this started giving
-      -- "./hakyll-std.hs: createProcess: runInteractiveProcess: exec: does not exist (No such file or directory))"
       unit $ liftIO $
-        cmd (Cwd dir) "./hakyll-std.hs --version"
+        cmd (Cwd dir) "./hakyll-std.hs"
         `catch` (\(e::IOException) -> putStr $ unlines $
           ["I could not run ./hakyll-std.hs in "++dir++" to install Hakyll."
           ,"If you see a hakyll-std build error after this, please do it manually:"
-          ,"$ (cd site/hakyll-std; ./hakyll-std.hs --version)"
+          ,"$ (cd site/hakyll-std; ./hakyll-std.hs)"
           ,"and try again."
           ])
-      -- compile
-      cmd (Cwd dir) "stack ghc hakyll-std"
 
     -- cleanup
 

site/hakyll-std/hakyll-std.hs

@@ -1,6 +1,11 @@
 #!/usr/bin/env stack
-{- stack runghc --verbosity info --package hakyll --package pandoc -}  -- pandoc-1.17.0.3
-{-# LANGUAGE OverloadedStrings #-}
+{- stack exec --verbosity info
+   --resolver nightly
+   --package hakyll
+   --package pandoc
+   -- ghc
+-}
+
 {- |
 
 A simple hakyll website builder suitable for software project sites,
@@ -31,6 +36,8 @@ $ hakyll-std [--help|clean|build|preview|...]   # standard hakyll options
 
 -}
 
+{-# LANGUAGE OverloadedStrings #-}
+
 import Control.Monad
 import Data.Default
 import Hakyll