Move import processing from the compiler

src/app.js

@@ -424,8 +424,35 @@ var run = function () {
         cb(err || 'Unknown transport error')
       })
   }
+
+  // FIXME: at some point we should invalidate the cache
+  var cachedRemoteFiles = {}
+
+  function handleImportCall (url, cb) {
+    var githubMatch
+    if (editor.hasFile(url)) {
+      cb(null, editor.getFile(url))
+    } else if (url in cachedRemoteFiles) {
+      cb(null, cachedRemoteFiles[url])
+    } else if ((githubMatch = /^(https?:\/\/)?(www.)?github.com\/([^/]*\/[^/]*)\/(.*)/.exec(url))) {
+      handleGithubCall(githubMatch[3], githubMatch[4], function (err, content) {
+        if (err) {
+          cb('Unable to import "' + url + '": ' + err)
+          return
+        }
+
+        cachedRemoteFiles[url] = content
+        cb(null, content)
+      })
+    } else if (/^[^:]*:\/\//.exec(url)) {
+      cb('Unable to import "' + url + '": Unsupported URL')
+    } else {
+      cb('Unable to import "' + url + '": File not found')
+    }
+  }
+
   var executionContext = new ExecutionContext()
-  var compiler = new Compiler(editor, handleGithubCall)
+  var compiler = new Compiler(editor, handleImportCall)
   var formalVerification = new FormalVerification($('#verificationView'), compiler.event)
 
   var offsetToLineColumnConverter = new OffsetToLineColumnConverter(compiler.event)

src/app/compiler.js

@@ -11,14 +11,13 @@ var EventManager = require('../lib/eventManager')
 /*
   trigger compilationFinished, compilerLoaded, compilationStarted
 */
-function Compiler (editor, handleGithubCall) {
+function Compiler (editor, handleImportCall) {
   var self = this
   this.event = new EventManager()
 
   var compileJSON
   var compilerAcceptsMultipleFiles
 
-  var cachedRemoteFiles = {}
   var worker = null
 
   var currentVersion
@@ -219,14 +218,12 @@ function Compiler (editor, handleGithubCall) {
       cb(null, files[editor.getCacheFile()])
       return
     }
+
     // FIXME: This will only match imports if the file begins with one.
     //        It should tokenize by lines and check each.
     // eslint-disable-next-line no-useless-escape
     var importRegex = /^\s*import\s*[\'\"]([^\'\"]+)[\'\"];/g
-    var reloop = false
-    var githubMatch
-    do {
-      reloop = false
+
     for (var fileName in files) {
       var match
       while ((match = importRegex.exec(files[fileName]))) {
@@ -241,39 +238,25 @@ function Compiler (editor, handleGithubCall) {
         }
       }
     }
+
     while (importHints.length > 0) {
       var m = importHints.pop()
       if (m in files) {
         continue
       }
-        if (editor.hasFile(m)) {
-          files[m] = editor.getFile(m)
-          reloop = true
-        } else if (m in cachedRemoteFiles) {
-          files[m] = cachedRemoteFiles[m]
-          reloop = true
-        } else if ((githubMatch = /^(https?:\/\/)?(www.)?github.com\/([^/]*\/[^/]*)\/(.*)/.exec(m))) {
-          handleGithubCall(githubMatch[3], githubMatch[4], function (err, content) {
-            if (err) {
-              cb('Unable to import "' + m + '": ' + err)
-              return
-            }
 
-            cachedRemoteFiles[m] = content
+      handleImportCall(m, function (err, content) {
+        if (err) {
+          cb(err)
+        } else {
           files[m] = content
-
           gatherImports(files, importHints, cb)
+        }
       })
-          return
-        } else if (/^[^:]*:\/\//.exec(m)) {
-          cb('Unable to import "' + m + '": Unsupported URL')
-          return
-        } else {
-          cb('Unable to import "' + m + '": File not found')
+
       return
     }
-      }
-    } while (reloop)
+
     cb(null, { 'sources': files })
   }