Generate .psci file

Resolves #11

8 files changed, 125 insertions, 19 deletions

diff --git a/README.md b/README.md
index 8a310d5..a45573f 100644
--- a/README.md
+++ b/README.md
@@ -99,3 +99,7 @@ module.exports = config;
 ```
 
 See the [example](https://github.com/ethul/purs-loader/tree/master/example) directory for a complete example.
+
+## Notes
+
+A `.psci` file is generated during each run of the loader.
diff --git a/package.json b/package.json
index 39c743b..f98769e 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "webpack": "^1.8.4"
   },
   "dependencies": {
+    "async": "^1.3.0",
     "glob": "^5.0.3",
     "loader-utils": "^0.2.6"
   }
diff --git a/src/FS.purs b/src/FS.purs
new file mode 100644
index 0000000..a56fe26
--- /dev/null
+++ b/src/FS.purs
@@ -0,0 +1,32 @@
+module PursLoader.FS
+  ( FS()
+  , writeFileUtf8
+  ) where
+
+import Control.Monad.Aff (Aff(), makeAff)
+import Control.Monad.Eff (Eff())
+import Control.Monad.Eff.Exception (Error())
+
+import Data.Function
+
+foreign import data FS :: !
+
+writeFileUtf8 :: forall eff. String -> String -> Aff (fs :: FS | eff) Unit
+writeFileUtf8 filepath contents = makeAff $ runFn4 writeFileUtf8Fn filepath contents
+
+foreign import writeFileUtf8Fn """
+function writeFileUtf8Fn(filepath, contents, errback, callback) {
+  return function(){
+    var fs = require('fs');
+
+    fs.writeFile(filepath, contents, function(error){
+      if (error) errback(error)();
+      else callback()();
+    });
+  };
+}
+""" :: forall eff. Fn4 String
+                       String
+                       (Error -> Eff (fs :: FS | eff) Unit)
+                       (Unit -> Eff (fs :: FS | eff) Unit)
+                       (Eff (fs :: FS | eff) Unit)
diff --git a/src/Glob.purs b/src/Glob.purs
new file mode 100644
index 0000000..392d9e4
--- /dev/null
+++ b/src/Glob.purs
@@ -0,0 +1,33 @@
+module PursLoader.Glob
+  ( Glob()
+  , globAll
+  ) where
+
+import Control.Monad.Aff (Aff(), makeAff)
+import Control.Monad.Eff (Eff())
+import Control.Monad.Eff.Exception (Error())
+
+import Data.Function
+
+foreign import data Glob :: !
+
+globAll :: forall eff. [String] -> Aff (glob :: Glob | eff) [[String]]
+globAll patterns = makeAff $ runFn3 globAllFn patterns
+
+foreign import globAllFn """
+function globAllFn(patterns, errback, callback) {
+  return function(){
+    var glob = require('glob');
+
+    var async = require('async');
+
+    async.map(patterns, glob, function(error, result){
+      if (error) errback(new Error(error))();
+      else callback(result)();
+    });
+  };
+}
+""" :: forall eff. Fn3 [String]
+                       (Error -> Eff (glob :: Glob | eff) Unit)
+                       ([[String]] -> Eff (glob :: Glob | eff) Unit)
+                       (Eff (glob :: Glob | eff) Unit)
diff --git a/src/Loader.purs b/src/Loader.purs
index 0235da9..872a51c 100644
--- a/src/Loader.purs
+++ b/src/Loader.purs
@@ -9,36 +9,72 @@ import Control.Monad.Eff (Eff())
 import Control.Monad.Eff.Class (liftEff)
 import Control.Monad.Eff.Exception (error)
 
-import Data.Array ((!!))
+import Data.Array ((!!), concat)
 import Data.Function (Fn2(), mkFn2)
 import Data.Maybe (Maybe(..), fromMaybe, maybe)
+import Data.String (joinWith)
 import Data.String.Regex (match, noFlags, regex)
 
 import PursLoader.ChildProcess (ChildProcess(), spawn)
+import PursLoader.FS (FS(), writeFileUtf8)
+import PursLoader.Glob (Glob(), globAll)
 import PursLoader.LoaderRef (LoaderRef(), Loader(), async, cacheable, query)
-import PursLoader.LoaderUtil (getRemainingRequest, parseQuery)
-import PursLoader.Options (loaderSrcOption, pscOptions)
+import PursLoader.LoaderUtil (parseQuery)
+import PursLoader.Options (loaderFFIOption, loaderSrcOption, pscOptions)
 
-type Effects eff = (loader :: Loader, cp :: ChildProcess | eff)
+type Effects eff = (cp :: ChildProcess, fs :: FS, glob :: Glob, loader :: Loader | eff)
 
 moduleRegex = regex "(?:^|\\n)module\\s+([\\w\\.]+)" noFlags { ignoreCase = true }
 
 pscCommand = "psc"
 
+psciCommand = "psci"
+
+psciFilename = ".psci"
+
 (!!!) = flip (!!)
 
+foreign import cwd "var cwd = process.cwd();" :: String
+
+foreign import relative """
+function relative(from) {
+  return function(to){
+    var path = require('path');
+    return path.relative(from, to);
+  };
+}
+""" :: String -> String -> String
+
+mkPsci :: [[String]] -> [[String]] -> String
+mkPsci srcs ffis = joinWith "\n" ((loadModule <$> concat srcs) <> (loadForeign <$> concat ffis))
+  where
+    loadModule :: String -> String
+    loadModule a = ":m " ++ relative cwd a
+
+    loadForeign :: String -> String
+    loadForeign a = ":f " ++ relative cwd a
+
 loader' :: forall eff. LoaderRef -> String -> Aff (Effects eff) (Maybe String)
 loader' ref source = do
   liftEff $ cacheable ref
 
-  let request = getRemainingRequest ref
-      parsed = parseQuery $ query ref
+  let parsed = parseQuery $ query ref
       srcs = fromMaybe [] (loaderSrcOption parsed)
+      ffis = fromMaybe [] (loaderFFIOption parsed)
       opts = pscOptions parsed
-      moduleName = match moduleRegex source >>= (!!!) 1
-      result = (\a -> "module.exports = require('" ++ a ++ "');") <$> moduleName
 
   spawn pscCommand (srcs <> opts)
+
+  srcss <- globAll srcs
+  ffiss <- globAll ffis
+
+  let psciFile = mkPsci srcss ffiss
+
+  writeFileUtf8 psciFilename psciFile
+
+  let moduleName = match moduleRegex source >>= (!!!) 1
+      result = (\a -> "module.exports = require('" ++ a ++ "');") <$> moduleName
+
   return result
 
 loader :: forall eff. LoaderRef -> String -> Eff (Effects eff) Unit
diff --git a/src/LoaderUtil.purs b/src/LoaderUtil.purs
index f22be44..86be124 100644
--- a/src/LoaderUtil.purs
+++ b/src/LoaderUtil.purs
@@ -1,18 +1,11 @@
 module PursLoader.LoaderUtil
-  ( getRemainingRequest
-  , parseQuery
+  ( parseQuery
   ) where
 
 import Data.Foreign (Foreign())
 
 import PursLoader.LoaderRef (LoaderRef())
 
-foreign import getRemainingRequest """
-function getRemainingRequest(ref){
-  var loaderUtils = require('loader-utils');
-  return loaderUtils.getRemainingRequest(ref);
-}""" :: LoaderRef -> String
-
 foreign import parseQuery """
 function parseQuery(query){
   var loaderUtils = require('loader-utils');
diff --git a/src/Options.purs b/src/Options.purs
index be21877..51e9be5 100644
--- a/src/Options.purs
+++ b/src/Options.purs
@@ -1,6 +1,7 @@
 module PursLoader.Options
   ( pscOptions
   , loaderSrcOption
+  , loaderFFIOption
   ) where
 
 import Data.Array (concat)
@@ -101,3 +102,6 @@ pscOptions query = either (const []) fold parsed
 
 loaderSrcOption :: Foreign -> Maybe [String]
 loaderSrcOption query = either (const Nothing) (\(Options a) -> runNullOrUndefined a.src) (read query)
+
+loaderFFIOption :: Foreign -> Maybe [String]
+loaderFFIOption query = either (const Nothing) (\(Options a) -> runNullOrUndefined a.ffi) (read query)
diff --git a/webpack.config.js b/webpack.config.js
index 11b9069..a39832f 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -4,6 +4,8 @@ var path = require('path');
 
 var webpack = require('webpack');
 
+var packageJson = require('./package.json');
+
 var noErrorsPlugin = webpack.NoErrorsPlugin;
 
 var dedupePlugin = webpack.optimize.DedupePlugin;
@@ -12,9 +14,10 @@ var config
   = { cache: true
     , target: 'node'
     , entry: { index: './entry' }
-    , externals: { 'glob': 'commonjs glob'
-                 , 'loader-utils': 'commonjs loader-utils'
-                 }
+    , externals: Object.keys(packageJson.dependencies).reduce(function(b, a){
+                   b[a] = 'commonjs ' + a;
+                   return b;
+                 }, {})
     , output: { path: __dirname
               , filename: '[name].js'
               , libraryTarget: 'commonjs2'