refacotr how we handle files already parsed

lib/core/file.js

@@ -15,11 +15,16 @@ class File {
   }
 
   parseFileForImport(content, isHttpContract, callback) {
+    const self = this;
     if (typeof isHttpContract === 'function') {
       callback = isHttpContract;
       isHttpContract = false;
     }
-    const self = this;
+    if (self.parsedImports) {
+      // We already parsed this file
+      return callback();
+    }
+    self.parsedImports = true;
     if (self.filename.indexOf('.sol') < 0) {
       // Only supported in Solidity
       return callback();
@@ -98,20 +103,15 @@ class File {
       content = fs.readFileSync(this.path).toString();
     } else if (this.type === File.types.custom) {
       return this.resolver((theContent) => {
-        if (!this.parsedImports) {
-          this.parsedImports = true;
-          return this.parseFileForImport(content, () => {
-            callback(theContent);
-          });
-        }
-        callback(theContent);
+        this.parseFileForImport(content, () => {
+          callback(theContent);
+        });
       });
     } else if (this.type === File.types.http) {
       return this.downloadFile(this.filename, this.path, (content) => {
         if (!content) {
           return callback(content);
         }
-        this.parsedImports = true;
         this.path = this.filename;
         this.type = File.types.dapp_file;
         callback(content);
@@ -119,13 +119,9 @@ class File {
     } else {
       throw new Error("unknown file: " + this.filename);
     }
-    if (!this.parsedImports) {
-      this.parsedImports = true;
-      return this.parseFileForImport(content, () => {
-        callback(content);
-      });
-    }
-    callback(content);
+    return this.parseFileForImport(content, () => {
+      callback(content);
+    });
   }
 
 }

test/file.js

@@ -59,5 +59,27 @@ describe('embark.File', function () {
         done();
       });
     });
+
+    it('should find all the imports but only once if called twice', function (done) {
+      const contract = fs.readFileSync('./test/contracts/contract_with_http_import.sol').toString();
+      const file = new File({filename: '.embark/contracts/embark-framework/embark/master/test_app/app/contracts/simple_storage.sol',
+        path: 'https://raw.githubusercontent.com/embark-framework/embark/develop/test_apps/test_app/app/contracts/simple_storage.sol'});
+      const downloadFileStub = sinon.stub(file, 'downloadFile')
+        .callsFake((path, url, cb) => {
+          cb();
+        });
+
+      file.parseFileForImport(contract, () => {
+        // Parse again
+        file.parseFileForImport(contract, () => {
+          assert.strictEqual(downloadFileStub.callCount, 1);
+          assert.strictEqual(downloadFileStub.firstCall.args[0],
+            '.embark/contracts/embark-framework/embark/develop/test_apps/contracts_app/contracts/contract_args.sol');
+          assert.strictEqual(downloadFileStub.firstCall.args[1],
+            'https://raw.githubusercontent.com/embark-framework/embark/develop/test_apps/contracts_app/contracts/contract_args.sol');
+          done();
+        });
+      });
+    });
   });
 });