compiler: add option to include static web app in the output

GitHub: closes #6

5 files changed, 65 insertions, 11 deletions

diff --git a/compiler/app/Main.hs b/compiler/app/Main.hs
index 1773073..24d8aad 100644
--- a/compiler/app/Main.hs
+++ b/compiler/app/Main.hs
@@ -22,37 +22,73 @@
 
 module Main where
 
-import Paths_ldgallery_compiler (version)
+import Paths_ldgallery_compiler (version, getDataFileName)
 import Data.Version (showVersion)
+import System.FilePath ((</>))
 import System.Console.CmdArgs
+
 import Compiler
+import Files (readDirectory, copyTo)
 
 
 data Options = Options
   { inputDir :: String
   , outputDir :: String
-  , rebuild :: Bool
+  , rebuilAll :: Bool
+  , withViewer :: Bool
   } deriving (Show, Data, Typeable)
 
 options = Options
   { inputDir = "./"
       &= typDir
+      &= explicit
+      &= name "i"
+      &= name "input-dir"
       &= help "Gallery source directory (default=./)"
   , outputDir = "./out"
       &= typDir
+      &= explicit
+      &= name "o"
+      &= name "output-dir"
       &= help "Generated gallery output path (default=./out)"
-  , rebuild = False
+  , rebuilAll = False
+      &= explicit
+      &= name "r"
+      &= name "rebuild-all"
       &= help "Invalidate cache and recompile everything"
+  , withViewer = False
+      &= explicit
+      &= name "w"
+      &= name "with-viewer"
+      &= help "Include the static web viewer in the output"
   }
-    &= summary ("ldgallery v" ++ (showVersion version) ++ " - a static gallery generator with tags")
-    &= program "ldgallery"
-    &= help "Compile a gallery"
-    &= helpArg [explicit, name "h", name "help"]
-    &= versionArg [explicit, name "v", name "version"]
+
+  &= summary ("ldgallery v" ++ (showVersion version) ++ " - a static gallery generator with tags")
+  &= program "ldgallery"
+  &= help "Compile a gallery"
+  &= helpArg [explicit, name "h", name "help"]
+  &= versionArg [explicit, name "version"]
 
 
 main :: IO ()
 main =
   do
     opts <- cmdArgs options
-    compileGallery (inputDir opts) (outputDir opts) (rebuild opts)
+    compileGallery (inputDir opts) (galleryOutputDir "gallery" opts) (rebuilAll opts)
+    if (withViewer opts) then copyViewer (outputDir opts) else noop
+
+  where
+    galleryOutputDir :: FilePath -> Options -> FilePath
+    galleryOutputDir gallerySubdir opts =
+      if withViewer opts then outputBase </> gallerySubdir else outputBase
+      where outputBase = outputDir opts
+
+    copyViewer :: FilePath -> IO ()
+    copyViewer target =
+      putStrLn "Copying viewer webapp"
+      >>  getDataFileName "viewer"
+      >>= readDirectory
+      >>= copyTo target
+
+    noop :: IO ()
+    noop = return ()
diff --git a/compiler/data/.gitignore b/compiler/data/.gitignore
new file mode 100644
index 0000000..dd4395c
--- /dev/null
+++ b/compiler/data/.gitignore
@@ -0,0 +1 @@
+viewer
diff --git a/compiler/data/readme.md b/compiler/data/readme.md
new file mode 100644
index 0000000..9aded74
--- /dev/null
+++ b/compiler/data/readme.md
@@ -0,0 +1 @@
+Link `../../viewer/dist` to `./viewer` for full distribution.
diff --git a/compiler/package.yaml b/compiler/package.yaml
index 90c4ea5..0b03887 100644
--- a/compiler/package.yaml
+++ b/compiler/package.yaml
@@ -27,6 +27,9 @@ dependencies:
 - JuicyPixels-extra
 - parallel-io
 
+data-dir: data
+data-files: ["**/*"]
+
 library:
   source-dirs: src
 
diff --git a/compiler/src/Files.hs b/compiler/src/Files.hs
index a6649c8..a658ded 100644
--- a/compiler/src/Files.hs
+++ b/compiler/src/Files.hs
@@ -19,6 +19,7 @@
 {-# LANGUAGE
     DuplicateRecordFields
   , DeriveGeneric
+  , NamedFieldPuns
 #-}
 
 module Files
@@ -27,7 +28,8 @@ module Files
   , fileName, maybeFileName, subPaths, pathLength
   , localPath, webPath
   , FSNode(..), AnchoredFSNode(..)
-  , nodePath, nodeName, isHidden, flattenDir, filterDir, readDirectory
+  , nodePath, nodeName, isHidden, flattenDir, filterDir
+  , readDirectory, copyTo
   , ensureParentDir, remove, isOutdated
   ) where
 
@@ -46,7 +48,8 @@ import System.Directory
   , getModificationTime
   , listDirectory
   , createDirectoryIfMissing
-  , removePathForcibly )
+  , removePathForcibly
+  , copyFile )
 
 import qualified System.FilePath
 import qualified System.FilePath.Posix
@@ -146,6 +149,16 @@ readDirectory root = mkNode (Path []) >>= return . AnchoredFSNode root
       >>= mapM (mkNode . ((</) path))
       >>= return . Dir path
 
+copyTo :: FilePath -> AnchoredFSNode -> IO ()
+copyTo target AnchoredFSNode{anchor, root} = copyNode root
+  where
+    copyNode :: FSNode -> IO ()
+    copyNode (File path) =
+      copyFile (localPath $ anchor /> path) (localPath $ target /> path)
+
+    copyNode (Dir path items) =
+      createDirectoryIfMissing True (localPath $ target /> path)
+      >> mapM_ copyNode items
 
 ensureParentDir :: (FileName -> a -> IO b) -> FileName -> a -> IO b
 ensureParentDir writer filePath a =