compiler: add log messages for early steps

This adds some messages signaling that the compiler is doing something
when it is enumerating the input tree and reading metadata files, which
may take a while on systems with slow IO such as when using a network
share.

GitHub: closes #344

1 files changed, 5 insertions, 1 deletions

diff --git a/compiler/src/Compiler.hs b/compiler/src/Compiler.hs
index 4111f02..d92d8e9 100644
--- a/compiler/src/Compiler.hs
+++ b/compiler/src/Compiler.hs
@@ -85,7 +85,8 @@ loadGalleryIndex path =
   doesFileExist path >>= bool (return Nothing) decodeIndex
   where
     decodeIndex =
-      JSON.eitherDecodeFileStrict path
+      putStrLn ("Loading previous index:\t" ++ path)
+      >>  JSON.eitherDecodeFileStrict path
       >>= either (\err -> warn err >> return Nothing) (return . Just)
     warn = putStrLn . ("Warning:\tUnable to reuse existing index as cache: " ++)
 
@@ -136,10 +137,13 @@ compileGallery configPath inputDirPath outputDirPath outputIndexPath excludedDir
   do
     config <- readConfig $ inputGalleryConf configPath
 
+    putStrLn "Inventorying input files"
     inputDir <- readDirectory inputDirPath
     excludedCanonicalDirs <- mapM canonicalizePath excludedDirs
+
     let sourceFilter = galleryDirFilter config excludedCanonicalDirs
     let sourceTree = filterDir sourceFilter inputDir
+    putStrLn "Reading input metadata"
     inputTree <- readInputTree sourceTree
     let curatedInputTree = filterInputTree (inputTreeFilter config) inputTree