gulp - How to get process.kill run when restarting due to changes -


i want use gulp run task, alway restart change, fail test.js listen port of 9001 when restarting, port used. want focus on restart event , kill listen event, right way? here code:

gulp.task('report', ['clean-build-app-dev', 'validate-devserver-scripts'], function(){     plugins.nodemon({ script: 'server/server.js', ext: 'js', args:['--ignore', 'test/'], env: { node_env: 'development' } })         .on('start', function () {             plugins.nodemon({ script: 'test/phantomflow/test/test.js', args:['--delay', '2.5', '--ignore', 'test/'], stdout: false })             .on('readable', function() {                 this.stdout.on('data', function(chunk) {                     if (/completed /.test(chunk)) {                         // plugins.nodemon({ script: 'test/phantomflow/test/test.js', args:['report', '--delay', '2', '--ignore', 'test/'] }); // run twice, use exec instand, know how solve it?                         const { exec } = require('child_process');                         exec('node test/phantomflow/test/test.js report', ['--delay', '2', '--ignore', 'test/']);                     }                     process.stdout.write(chunk);                 });                 this.stderr.pipe(process.stderr);             })             .on('restart', function() {                 console.log('* sigusr2 detected_________11111111111111___________________');                 // process.once('sigusr2', function () {                 //       // gracefulshutdown(function () {                 //       //   process.kill(process.pid, 'sigusr2');                 //       // });                 //     });                 process.once('sigusr2', function(code) {                         console.log('* sigusr2 detected_____________22222222222222222_______________');                         process.kill(process.pid, 'sigusr2');                     });             });         }); });

the error below：

[17:07:45] [nodemon] restarting due changes... * sigusr2 detected_________11111111111111___________________ [17:07:45] [nodemon] starting `node test/phantomflow/test/test.js --delay 2.5 --ignore test/` parallelising 1 test files on 1 processes.  picking job: flows\carepilotweb.test.js events.js:160       throw er; // unhandled 'error' event       ^  error: listen eaddrinuse :::9001     @ object.exports._errnoexception (util.js:1026:11)     @ exports._exceptionwithhostport (util.js:1049:20)     @ server._listen2 (net.js:1257:14)     @ listen (net.js:1293:10)     @ server.listen (net.js:1389:5)     @ function.app.listen (c:\workspace\deleteme_0420\carepilot-web\test\phantomflow\node_modules\connect\lib\proto.js:232:24)     @ object.<anonymous> (c:\workspace\deleteme_0420\carepilot-web\test\phantomflow\test\test.js:46:4)     @ module._compile (module.js:570:32)     @ object.module._extensions..js (module.js:579:10)     @ module.load (module.js:487:32) [17:07:46] [nodemon] app crashed - waiting file changes before starting...

how log changed file name? or can anyway prevent watch / restart? sometime may restart in loop without stopping when there no change. how solve it, can give me suggestion, thanks.

edit: when change task file this, work:

gulp.task('report-debug', /*['clean-build-app-dev', 'validate-devserver-scripts'],*/ function(){     // start nodemon load test.js     plugins.nodemon({ script: 'server/server.js', ext: 'js', watch: ['server/'], args:['--ignore', 'test/'], env: { node_env: 'development' } })         .on('start', function () {             plugins.nodemon({ script: 'test/phantomflow/test/test.js', watch: ['server/'], args:['debug', '--ignore', 'test/'], stdout: false })             .on('readable', function() {                 this.stdout.on('data', function(chunk) {                     if (/completed /.test(chunk)) {                         const { exec } = require('child_process');                         exec('node test/phantomflow/test/test.js report', ['--ignore', 'test/']);                     }                     process.stdout.write(chunk);                 });                 this.stderr.pipe(process.stderr);             });         }); });

this kind code works too:

gulp.task('report', ['clean-build-app-dev', 'validate-devserver-scripts'], function(){     // start nodemon load test.js     var ls, innerls;     plugins.nodemon({ script: 'server/server.js', ext: 'js', args:['--ignore', 'test/', '--ignore', 'gulpfile.js'], env: { node_env: 'development' } })         .on('start', function () {             const { spawn } = require('child_process');             ls = spawn('node', ['test/phantomflow/test/test.js']);              ls.stdout.on('data', (data) => {                 if (/completed /.test(data)) {                         // const { exec } = require('child_process');                         // exec('node test/phantomflow/test/test.js report', ['--delay', '2', '--ignore', 'test/']);                         innerls = spawn('node', ['test/phantomflow/test/test.js', 'report']);                     }                     process.stdout.write(data);             });              ls.stderr.on('data', (data) => {               console.log(`stderr: ${data}`);             });              ls.on('close', (code) => {               console.log(`child process exited code ${code}`);             });         })         .on('restart', function() {             if(ls) ls.kill('sigint');             if(innerls) innerls.kill('sigint');         }); });


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