How to use execsync - 10 common examples

"use strict";

var sh = require('execSync').run;

var shOutput = require('execSync').exec;
var file, command, fileChanged;

var object = require('../../hooks/data/update');
for (var i in object) {
    file = object[i].file;
    command = object[i].command;
    fileChanged = (shOutput('git diff HEAD@{1} --stat -- ' + file + ' | wc -l').stdout > 0);

    if (fileChanged) {
        console.log(file + ' has changed, dependencies will be updated.'); // jshint ignore:line
        sh(command);
    }
}
process.exit(0);

sh.run('bundle install --path vendor');
        this.installDependencies({
          callback: function () {
            console.log('\u001b[2J\u001b[0;0H');
            console.log(chalk.yellow('★ ') + chalk.green('Installation Complete!\n') +
              '  ▪ Move into the ' + chalk.cyan(dir) + ' directory\n' +
              '  ▪ Run ' + chalk.yellow('gulp') + ' to start working with Style Prototypes!');
          }
        });
      }

      //////////////////////////////
      // If the --git flag is passed, initialize git and add for initial commit
      //////////////////////////////
      if (this.options['git']) {
        sh.run('git init');
        sh.run('git add . && git commit -m "Style Prototype Generation"');
      }
    });
  },

_(fold+1).times(function(n){
			// _.each(parameters,  function(value, key, list){ 

				foldcom = " for [i=2:"+ (_.size(classifiers) + 1)+"] \'"+dir+value+"-fold"+n+"\' using 1:i with linespoints linecolor i pt "+n+" ps 3"
				com = "gnuplot -p -e \"reset; set term png truecolor size 1024,1024; set grid ytics; set grid xtics; set key bottom right; set output \'"+dir + value+"fold"+n+".png\'; set key autotitle columnhead; plot "+foldcom +"\""
				result = execSync.run(com)

				plotfor = plotfor + foldcom + ", "
				// fs.writeFileSync(dir+value+"-fold"+n, header, 'utf-8', function(err) {console.log("error "+err); return 0 })
				// },this)
			},this)
			plotfor = plotfor.substring(0,plotfor.length-2);

this.on('end', function () {
      //////////////////////////////
      // If the --git flag is passed, initialize git and add for initial commit
      //////////////////////////////
      if (this.options['git']) {
        sh.run('git init');
        sh.run('git add . && git commit -m "Mr. Poole\'s Generation"');
      }
    });
  },

end: function () {
    //////////////////////////////
    // If the --git flag is passed, initialize git and add for initial commit
    //////////////////////////////
    if (this.options['git']) {
      sh.run('git init');
      sh.run('git add . && git commit -m "North Generation"');
    }
  }
});

if(options.apache_scheme === 'vhost'){

			// vhost setting
			var vhostTemplate = grunt.file.read(__dirname + '/../templates/vhost.ejs'),
				newVhostFile = options.vhost_dir + '/' + options.site_slug + '.conf',
				vhostData = {
					slug: options.site_slug,
					hostName: hostName,
					docRoot: options.doc_root,
					logsDir: options.logs_dir
				},
				vhostContents = ejs.render(vhostTemplate, vhostData);

			// create the vhost file
			grunt.hpLog.subhead('Creating virtualhost file...');
			execSync.run( sudo.apply('echo "' + vhostContents.replace('"', '\"') + '" > ' + newVhostFile ) );


			// Point host name to localhost in hosts file
			grunt.hpLog.subhead('Defining "' + hostName + '" in hosts file...');

			if( hostExists(hostName, '127.0.0.1') ){
				grunt.hpLog.ok('Host already defined.');
			}else{

				var lhLine = '\n127.0.0.1	' + hostName;
				execSync.run( sudo.apply('echo "' + lhLine + '" >> /etc/hosts') );

				grunt.hpLog.ok('Host defined.');

			}

var traceFile = path.join(benchOutputDir, 'mem-trace');
    var cliArgs = [
        lifetimeAnalysisScript,
        "--no-progress",
//        "--ref-trace",
        "--ref",
        "--trace",
        traceFile,
        ">",
        path.join(benchOutputDir, 'enhanced-trace')
    ];
    var cliStr = "export LIFETIME_ANALYSIS_OPTS=\" -Xmx2G -Dtesting=no\" && " + cliArgs.join(' ');
    var result = new fastStats.Stats();
    for (var i = 0; i < NUM_ENHANCED_RUNS; i++) {
        var time = Date.now();
        sh.run(cliStr);
        result.push(Date.now() - time);
    }
    return result;
}

function execSync(cmd) {
    if (cp.execSync) {
        // node v0.12; use the built-in functionality
        try {
            cp.execSync(cmd);
            return false;
        } catch (e) {
            return true;
        }
    } else {
        // node v0.10; fall back on execSync package
        return require("execSync").run(cmd);
    }
}

function execSync(cmd) {
       /* var FFI = require("node-ffi");
        var libc = new FFI.Library(null, {
            "system": ["int32", ["string"]]
        });

        var run = libc.system;
        run(cmd);*/
	es = require('execSync')
	es.run(cmd)
    }

}).then(function (result) {
            checkResult(result);
            traceFile = result.traceFile;
            execSync.run("wc -l " + traceFile);
            console.log("---Record")
            console.log(result.stdout);
            console.log(result.stderr);
            return jalangi.replay(traceFile);
        }).then(function (result) {
            checkResult(result);