fixes comilation with sync fs based request

Author: wclr

README.md

@@ -1,6 +1,6 @@
 # ts-node-dev 
 
-> Tweacked version of [node-dev](https://github.com/fgnass/node-dev) that uses [ts-node](https://github.com/TypeStrong/ts-node) under the hood. 
+> Tweaked version of [node-dev](https://github.com/fgnass/node-dev) that uses [ts-node](https://github.com/TypeStrong/ts-node) under the hood. 
 
 It restarts target node process when any of required files changes (as standard `node-dev`) but shares [Typescript](https://github.com/Microsoft/TypeScript/) compilation process between restarts. This significantly increases speed of restarting comparing to `node-dev -r ts-node/register ...`, `nodemon -x ts-node ...` variations because there is no need to instantiate `ts-node` compilation each time.
 

lib/child-require-hook.js

@@ -2,6 +2,7 @@ var fs = require('fs')
 var getCompiledPath = require('./get-compiled-path')
 var sep = require('path').sep
 
+var compilationId
 var timeThreshold = 10000
 var allowJs = false
 var compiledDir
@@ -15,6 +16,8 @@ var compile = (code, fileName) => {
     compile: fileName,
     compiledPath: compiledPath
   })
+  var compileRequestFile = [compiledDir, compilationId + '.req'].join(sep)
+  fs.writeFileSync(compileRequestFile, [fileName, compiledPath].join('\n'))
   var compiled
   var start = new Date().getTime()
   var passed

lib/compiler.js

@@ -20,9 +20,15 @@ var comilationInstanceStampt = new Date().getTime()
 var compiler = {
   allowJs: false,
   tsConfigPath: '',
+  getCompilationId: function () {
+    return comilationInstanceStampt
+  },
   getCompiledDir: function () {
     return path.join(tmpDir, 'compiled').replace(/\\/g, '/')
   },
+  getCompileReqFilePath: function () {
+    return path.join(compiler.getCompiledDir(), compiler.getCompilationId() + '.req')
+  },
   getCompilerReadyFilePath: function () {
     return path.join(os.tmpdir(), 'ts-node-dev-ready-' + comilationInstanceStampt)
       .replace(/\\/g, '/')
@@ -54,6 +60,7 @@ var compiler = {
           .map(ignore => 'new RegExp("' + ignore + '")').join(', ') + ']'
       fileData = fileData.replace('var ignore = [/node_modules/]', 'var ignore = ' + ignoreVal)
     }
+    fileData = fileData.replace('var compilationId', 'var compilationId = "' + compiler.getCompilationId() + '"')
     fileData = fileData.replace('var compiledDir', 'var compiledDir = "' + compiler.getCompiledDir() + '"')
     fileData = fileData.replace('./get-compiled-path', path.join(__dirname, 'get-compiled-path').replace(/\\/g, '/'))
     fileData = fileData.replace('var readyFile',

lib/index.js

@@ -2,7 +2,8 @@ var fork = require('child_process').fork;
 var filewatcher = require('filewatcher');
 var ipc = require('./ipc');
 var resolveMain = require('./resolveMain');
-var compiler = require('./compiler')
+var compiler = require('./compiler');
+var fs = require('fs');
 
 module.exports = function (script, scriptArgs, nodeArgs, opts) {  
   compiler.init(opts)
@@ -71,7 +72,33 @@ module.exports = function (script, scriptArgs, nodeArgs, opts) {
       env: process.env
     });
 
-    child.on('message', compiler.compile);
+    var compileReqWatcher = filewatcher({ forcePolling: opts.poll });
+    var currentCompilePath
+    fs.writeFileSync(compiler.getCompileReqFilePath(), '');
+    compileReqWatcher.add(compiler.getCompileReqFilePath());
+    compileReqWatcher.on('change', function (file) {      
+      fs.readFile(file, 'utf-8', function (err, data) {
+        var split = data.split('\n')
+        var compile = split[0]
+        var compiledPath = split[1]
+        if (currentCompilePath == compiledPath) return
+        currentCompilePath = compiledPath
+        // console.log('compileReqWatcher file change', compile);
+        if (compiledPath) {
+          compiler.compile({
+            compile: compile,
+            compiledPath: compiledPath
+          })
+        }
+      })
+    })
+    child.on('message', function (message) {
+      if (currentCompilePath == message.compiledPath) return
+      currentCompilePath = message.compiledPath
+      // console.log('message comile', message.compile);
+      compiler.compile(message)
+    });
+    
     child.on('exit', function (code) {
       if (!child.respawn) process.exit(code);
       child = undefined;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ts-node-dev",
-  "version": "1.0.0-pre.15",
+  "version": "1.0.0-pre.16",
   "description": "Compiles your TS app and restarts when files are modified.",
   "keywords": [
     "restart",