use execSync to watch compiled file, issue #6

Author: wclr

lib/check-file-exists.js

@@ -0,0 +1,11 @@
+var fs = require('fs')
+var filePath = process.argv[2]
+
+const handler = function (stat) {
+  if (stat && stat.birthtime.getTime() > 0) {
+    process.exit(0)
+  }
+}
+
+fs.watchFile(filePath, { interval: 100 }, handler)
+fs.stat(filePath, function (err, stat) { handler(stat) })

lib/child-require-hook.js

@@ -1,7 +1,8 @@
 var fs = require('fs')
 var getCompiledPath = require('./get-compiled-path')
 var sep = require('path').sep
-
+var join = require('path').join
+var execSync = require('child_process').execSync
 var compilationId
 var timeThreshold = 10000
 var allowJs = false
@@ -10,6 +11,8 @@ var preferTs = false
 var ignore = [/node_modules/]
 var readyFile
 
+var checkFileScript = join(__dirname, 'check-file-exists.js')
+
 var compile = (code, fileName) => {
   var compiledPath = getCompiledPath(code, fileName, compiledDir)
   process.send({
@@ -18,20 +21,8 @@ var compile = (code, fileName) => {
   })
   var compileRequestFile = [compiledDir, compilationId + '.req'].join(sep)
   fs.writeFileSync(compileRequestFile, [fileName, compiledPath].join('\n'))
-  var compiled
-  var start = new Date().getTime()
-  var passed
-  while (compiled === undefined) {
-    if (fs.existsSync(compiledPath + '.done')) {
-      compiled = fs.readFileSync(compiledPath, 'utf-8')
-    }
-    passed = (new Date().getTime() - start)
-    if (passed > timeThreshold) {
-      throw new Error(
-        'Could not require ' + fileName + ', compiled path:' + compiledPath
-      )
-    }
-  }
+  execSync(['node', checkFileScript, '"' + compiledPath + '.done' + '"'].join(' '), { stdio: 'inherit' })
+  var compiled = fs.readFileSync(compiledPath, 'utf-8')
   return compiled
 }
 

lib/compiler.js

@@ -42,7 +42,7 @@ var compiler = {
   },
   writeChildHookFile: function (options) {
     var fileData = fs.readFileSync(path.join(__dirname, 'child-require-hook.js'), 'utf-8')
-    var compileTimeout = parseInt(options['compile-timeout'])
+    var compileTimeout = parseInt(options['compile-timeout'])    
     if (compileTimeout) {
       fileData = fileData.replace('10000', compileTimeout.toString())
     }
@@ -65,6 +65,7 @@ var compiler = {
     fileData = fileData.replace('./get-compiled-path', path.join(__dirname, 'get-compiled-path').replace(/\\/g, '/'))
     fileData = fileData.replace('var readyFile',
       'var readyFile = "' + compiler.getCompilerReadyFilePath() + '"')
+    fileData = fileData.replace(/__dirname/, '"' + __dirname.replace(/\\/g, '/') + '"')
     fs.writeFileSync(compiler.getChildHookPath(), fileData)
   },
   init: function (options) {

lib/index.js

@@ -135,7 +135,9 @@ module.exports = function (script, scriptArgs, nodeArgs, opts) {
   }
 
   function stop(willTerminate) {
-    child.respawn = true;
+    if (!child || child.stopping) return;
+    child.stopping = true
+    child.respawn = true;    
     child.disconnect();
     if (!willTerminate) child.kill('SIGTERM');
   }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ts-node-dev",
-  "version": "1.0.0-pre.23",
+  "version": "1.0.0-pre.24",
   "description": "Compiles your TS app and restarts when files are modified.",
   "keywords": [
     "restart",