data dir checks to fix installation with scarf

app/Main.hs

@@ -8,16 +8,34 @@ import           Paths_toodles
 import           Server
 import           Types
 
+import           Control.Monad            (when)
 import           Data.IORef               (newIORef)
 import           Data.Maybe               (fromMaybe)
 import qualified Data.Text                as T (unpack)
 import           Network.Wai.Handler.Warp (run)
+import           System.Directory
+import           System.Environment
+import           System.FilePath.Posix
 import           Text.Printf              (printf)
 
 main :: IO ()
 main = do
-  dataDir <- getDataDir
-  licenseRead <- readLicense (dataDir ++ "/toodles-license-public-key.pem") "/etc/toodles/license.json"
+  dataDirLocal <- (return . takeDirectory) =<< getExecutablePath
+  dataDirBuilt <- getDataDir
+  useBinaryLocalDataDir <- doesDirectoryExist $ dataDirLocal <> "/web"
+  useBuiltDataDir <- doesDirectoryExist $ dataDirBuilt <> "/web"
+  when
+    (not useBuiltDataDir && not useBuiltDataDir)
+    (fail
+       "Couldn't initialize toodles, no valid data directory found. Please file a bug on Github.")
+  let dataDir =
+        if useBinaryLocalDataDir
+          then dataDirLocal
+          else dataDirBuilt
+  licenseRead <-
+    readLicense
+      (dataDir ++ "/toodles-license-public-key.pem")
+      "/etc/toodles/license.json"
   let license = (either (BadLicense) (id) licenseRead)
   userArgs <- toodlesArgs >>= setAbsolutePath
   case userArgs of

package.yaml

@@ -1,5 +1,5 @@
 name:                toodles
-version:             1.2.1
+version:             1.2.2
 github:              "aviaviavi/toodles"
 license:             MIT
 author:              "Avi Press"
@@ -92,6 +92,7 @@ executables:
     - cmdargs ==0.10.20
     - directory ==1.3.1.5
     - extra ==1.6.13
+    - filepath ==1.4.2
     - megaparsec ==6.5.0
     - process >=1.6.3.0
     - regex-posix ==0.95.2

toodles.cabal

@@ -4,7 +4,7 @@ cabal-version: 1.12
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: f1065a51b86ff48993a22be460338247dcf2d32b7beb90b72f0e4e23622d3f8c
+-- hash: f68cfaef2046d66fb1295333e3b53e62da19f337ca7e7d1e2019158db31b32cf
 
 name:           toodles
 version:        1.2.1
@@ -102,6 +102,7 @@ executable toodles
     , cmdargs ==0.10.20
     , directory ==1.3.1.5
     , extra ==1.6.13
+    , filepath ==1.4.2
     , megaparsec ==6.5.0
     , process >=1.6.3.0
     , regex-posix ==0.95.2