build(travis): add travis log folding for verbose tasks

tools/build/dartanalyzer.js

@@ -4,12 +4,15 @@ var spawn = require('child_process').spawn;
 var path = require('path');
 var glob = require('glob');
 var fs = require('fs');
+var travisFoldStart = require('../travis/travis-fold');
 var util = require('./util');
 var yaml = require('js-yaml');
 
 module.exports = function(gulp, plugins, config) {
   return function() {
+    var travisFoldEnd = travisFoldStart(`dartanalyzer-${config.use_ddc ? 'ddc' : ''}-${config.dest}`);
     var tempFile = '_analyzer.dart';
+
     return util.forEachSubDirSequential(config.dest, function(dir) {
       var pubspecContents = fs.readFileSync(path.join(dir, 'pubspec.yaml'));
       var pubspec = yaml.safeLoad(pubspecContents);
@@ -36,7 +39,7 @@ module.exports = function(gulp, plugins, config) {
         analyze(dir, defer.makeNodeResolver());
       }
       return defer.promise;
-    });
+    }).then(travisFoldEnd);
 
     function analyze(dirName, done, useDdc) {
       // TODO remove --package-warnings once dartanalyzer handles transitive libraries

tools/build/pubget.js

@@ -1,6 +1,8 @@
 var util = require('./util');
 var spawn = require('child_process').spawn;
 var path = require('path');
+var travisFoldStart = require('../travis/travis-fold');
+
 
 module.exports = {
   dir: pubGetDir,
@@ -9,15 +11,19 @@ module.exports = {
 
 function pubGetDir(gulp, plugins, config) {
   return function() {
+    var travisFoldEnd = travisFoldStart(`pubget-${config.dir}`);
+
     return util.processToPromise(spawn(config.command, ['upgrade'], {
       stdio: 'inherit',
       cwd: config.dir
-    }));
+    })).then(travisFoldEnd);
   };
 };
 
 function pubGetSubDir(gulp, plugins, config) {
   return function() {
+    var travisFoldEnd = travisFoldStart(`pubget-${config.command}-${config.dir}`);
+
     // We need to execute pubspec serially as otherwise we can get into trouble
     // with the pub cache...
     return util.forEachSubDirSequential(config.dir, function(subDir) {
@@ -25,6 +31,6 @@ function pubGetSubDir(gulp, plugins, config) {
         stdio: 'inherit',
         cwd: subDir
       }));
-    });
+    }).then(travisFoldEnd);
   };
 };

tools/travis/travis-fold.js

@@ -0,0 +1,12 @@
+module.exports = function travisFoldStart(name) {
+  if (process.env.TRAVIS) console.log('travis_fold:start:' + encode(name));
+
+  return function travisFoldEnd() {
+    if (process.env.TRAVIS) console.log('travis_fold:end:' + encode(name));
+  }
+};
+
+
+function encode(name) {
+  return name.replace(/\W/g, '-').replace(/-$/, '');
+}