Use output file instead of parsing stdout

scripts/travis-bench.js

@@ -1,4 +1,5 @@
 const path = require('path');
+const fs = require('fs');
 const childProcess = require('child_process');
 const fetch = require('node-fetch');
 
@@ -14,6 +15,8 @@ if (pullRequest === 'false') {
     process.exit(0);
 }
 
+const outputFile = path.join(process.cwd(), 'tmp', 'output.txt');
+
 const args = [
     `--capabilities=${JSON.stringify([
 /*            {
@@ -59,13 +62,12 @@ const args = [
             },
     ])}`,
     `--server=http://${username}:${accessKey}@ondemand.saucelabs.com/wd/hub`,
-    `--custom=${process.cwd()}`
+    `--custom=${process.cwd()}`,
+    `--output=${outputFile}`,
 ];
 
-let stdout;
-
 try {
-    stdout = childProcess.execFileSync(path.join(__dirname, 'benchmark.sh'), args, {
+    childProcess.execFileSync(path.join(__dirname, 'benchmark.sh'), args, {
         cwd: process.cwd(),
         stdio: 'inherit'
     });
@@ -73,33 +75,6 @@ try {
     console.error('An error occurred running the benchmark!');
 }
 
-if (typeof stdout !== 'string') {
-    stdout = stdout.toString('utf8');
-}
-
-const outputs = [];
-let index = 0;
-let started = false;
-
-// parse the output to find what we want
-const split = stdout.split('\n');
-split.forEach((line, lineNum) => {
-    if (started) {
-        if (line.indexOf('Running capability') === 0 || line.indexOf('Took ') === 0) {
-            started = false;
-            index++;
-        } else {
-            if (outputs.length <= index) {
-                outputs[index] = [];
-            }
-            outputs[index].push(line);
-        }
-    } else if (lineNum > 0 && line === '' && split[lineNum - 1].indexOf('Testing ') === 0) {
-        started = true;
-    }
-});
-
-if (pullRequest !== 'false') {
 const githubUsername = 'Svelte-Bot';
 const id = 29757693;
 const githubToken = process.env.GITHUB_ACCESS_TOKEN;
@@ -123,9 +98,7 @@ if (pullRequest !== 'false') {
         }
 
         if (addComment) {
-                const contents = '<details><summary>Benchmark Results</summary>' + 
-                    outputs.map(output => output.join('\n')).join('\n----------------------------------------------------------------------\n') +
-                    '</details>';
+            const contents = '<details><summary>Benchmark Results</summary>' + fs.readFileSync(outputFile) + '</details>';
             if (editId === null) {
                 return fetch(`https://${githubUsername}:${githubToken}@api.github.com/repos/sveltejs/svelte/issues/${pullRequest}/comments`, {
                     method: 'POST',
@@ -143,4 +116,3 @@ if (pullRequest !== 'false') {
             }
         }
     });
-}