diff options
| -rw-r--r-- | src/Hakyll/Init.hs | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/Hakyll/Init.hs b/src/Hakyll/Init.hs index 9d90f31..71055f0 100644 --- a/src/Hakyll/Init.hs +++ b/src/Hakyll/Init.hs @@ -9,7 +9,7 @@ import Control.Arrow (first) import Control.Monad (forM_) import Data.Char (isAlphaNum, isNumber) import Data.List (foldl') -import Data.List (intercalate) +import Data.List (intercalate, isPrefixOf) import Data.Version (Version (..)) import System.Directory (canonicalizePath, copyFile) import System.Environment (getArgs, getProgName) @@ -31,7 +31,13 @@ main = do files <- getRecursiveContents (const $ return False) srcDir case args of - [dstDir] -> do + -- When the argument begins with hyphens, it's more likely that the user + -- intends to attempt some arguments like ("--help", "-h", "--version", etc.) + -- rather than create directory with that name. + -- If dstDir begins with hyphens, the guard will prevent it from creating + -- directory with that name so we can fall to the second alternative + -- which prints a usage info for user. + [dstDir] | not ("-" `isPrefixOf` dstDir) -> do forM_ files $ \file -> do let dst = dstDir </> file src = srcDir </> file |