compile all files using the right tsconfig.json

- tsc-wrapper.js is just a wrapper on top of tsc for VS Code,
  that walks up the dirtree until a tsconfig.json is found and
  compiles at that path. necessary for tasks.json configuration
- test compilation will also work with this, but there's an issue with
  test/tsconfig.json

Author: ashwinr

.settings/settings.json

@@ -13,6 +13,7 @@
 		".git",
 		".tscache",
 		"bower_components",
+        "bin",
 		"build",
         "lib",
 		"node_modules"

.settings/tasks.json

@@ -6,23 +6,14 @@
 // ${fileExtname}: the current opened file's extension
 // ${cwd}: the current working directory of the spawned process
 
-// A task runner that calls the Typescipt compiler (tsc) and compiles based on a tsconfig.json file
+// A task runner that calls scripts/tsc-wrapper.js. The wrapper script traverses
+// up the file system until a valid `tsconfig.json` is found, and runs `tsc` from
+// node_modules with that path as the root
 {
 	"version": "0.1.0",
-	
-	// The command is tsc. Assumes that tsc has been installed using npm install -g typescript
-	"command": "${workspaceRoot}/node_modules/typescript/bin/tsc",
-	
-	// The command is a shell script
+	"command": "${workspaceRoot}/scripts/tsc-wrapper.js",
 	"isShellCommand": true,
-
-	// Show the output window only if unrecognized errors occur. 
 	"showOutput": "silent",
-	
-	// Tell the tsc compiler to use the tsconfig.json from the open folder.
-	"args": ["-p", "${fileDirname}"],
-	
-	// use the standard tsc problem matcher to find compile problems
-	// in the output.
+	"args": ["${workspaceRoot}", "${fileDirname}"],
 	"problemMatcher": "$tsc"
 }

scripts/tsc-wrapper.js

@@ -0,0 +1,38 @@
+#!/usr/bin/env node
+
+/* global process */
+
+var execSync = require("child_process").execSync;
+var findup = require("findup-sync");
+var path = require("path");
+var spawnSync = require("child_process").spawnSync;
+
+/* print a buffer to a stream */ 
+function print(buffer, stream) {
+    if (buffer != null) {
+        var output = buffer.toString("utf8");
+        stream.write(output);
+    }
+}
+
+var argv = process.argv;
+if (argv.length < 4) {
+    console.error("insufficient arguments to tsc wrapper");
+    process.exit(1);
+}
+
+var workspacePath = argv[2];
+var filePath = argv[3];
+
+var configPath = path.dirname(findup("tsconfig.json", { cwd: filePath, nocase: true }));
+if (configPath == null) {
+    console.error("tsconfig.json not found");
+    process.exit(2);
+}
+
+var tscPath = path.join(workspacePath, "node_modules", "typescript", "bin", "tsc");
+var tsc = spawnSync(tscPath, ["-p", configPath]);
+
+print(tsc.stdout, process.stdout);
+print(tsc.stderr, process.stderr);
+process.exit(tsc.status);