Highlight cache usage in resin build

This commit will highlight the usage of the cache when doing a docker
build via `resin build`, which not only helps the user understand what
the build is doing, but also achieves more parity with the cloud
builder.

Change-type: patch
Signed-off-by: Cameron Diver <cameron@resin.io>

CHANGELOG.md

@@ -6,6 +6,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 
 - Add uploading of build logs when present with resin deploy
+- Highlight cache usage in a local build
 
 ### Fixed
 

build/utils/docker.js

@@ -1,5 +1,5 @@
 // Generated by CoffeeScript 1.12.5
-var generateConnectOpts, tarDirectory;
+var cacheHighlightStream, generateConnectOpts, tarDirectory;
 
 exports.appendOptions = function(opts) {
   return opts.concat([
@@ -98,6 +98,30 @@ exports.tarDirectory = tarDirectory = function(dir) {
   });
 };
 
+cacheHighlightStream = function() {
+  var EOL, colors, es, extractArrowMessage;
+  colors = require('colors/safe');
+  es = require('event-stream');
+  EOL = require('os').EOL;
+  extractArrowMessage = function(message) {
+    var arrowTest, match;
+    arrowTest = /^\s*-+>\s*(.+)/i;
+    if ((match = arrowTest.exec(message))) {
+      return match[1];
+    } else {
+      return void 0;
+    }
+  };
+  return es.mapSync(function(data) {
+    var msg;
+    msg = extractArrowMessage(data);
+    if ((msg != null) && msg.toLowerCase() === 'using cache') {
+      data = colors.bgGreen.black(msg);
+    }
+    return data + EOL;
+  });
+};
+
 exports.runBuild = function(params, options, getBundleInfo, logStreams) {
   var Promise, dockerBuild, doodles, es, logging, logs, resolver;
   Promise = require('bluebird');
@@ -115,15 +139,17 @@ exports.runBuild = function(params, options, getBundleInfo, logStreams) {
       var builder, connectOpts, hooks, opts;
       hooks = {
         buildSuccess: function(image) {
+          var doodle;
           if (options.tag != null) {
             console.log("Tagging image as " + options.tag);
           }
+          doodle = doodles.getDoodle();
           console.log();
-          console.log(doodles.getDoodle());
+          console.log(doodle);
           console.log();
           return resolve({
             image: image,
-            log: logs
+            log: logs + '\n' + doodle + '\n'
           });
         },
         buildFailure: reject,
@@ -147,7 +173,7 @@ exports.runBuild = function(params, options, getBundleInfo, logStreams) {
             logs += data.toString();
             return this.emit('data', data);
           });
-          return stream.pipe(es.pipe(throughStream, logStreams.build));
+          return stream.pipe(throughStream).pipe(cacheHighlightStream()).pipe(logStreams.build);
         }
       };
       connectOpts = generateConnectOpts(options);

lib/utils/docker.coffee

@@ -110,6 +110,24 @@ exports.tarDirectory = tarDirectory = (dir) ->
 		pack.finalize()
 		return pack
 
+cacheHighlightStream = ->
+	colors = require('colors/safe')
+	es = require('event-stream')
+	{ EOL } = require('os')
+
+	extractArrowMessage = (message) ->
+		arrowTest = /^\s*-+>\s*(.+)/i
+		if (match = arrowTest.exec(message))
+			match[1]
+		else
+			undefined
+
+	es.mapSync (data) ->
+		msg = extractArrowMessage(data)
+		if msg? and msg.toLowerCase() == 'using cache'
+			data = colors.bgGreen.black(msg)
+		return data + EOL
+
 # Pass in the command line parameters and options and also
 # a function which will return the information about the bundle
 exports.runBuild = (params, options, getBundleInfo, logStreams) ->
@@ -136,11 +154,12 @@ exports.runBuild = (params, options, getBundleInfo, logStreams) ->
 						console.log("Tagging image as #{options.tag}")
 					# Show charlie. In the interest of cloud parity,
 					# use console.log, not the standard logging streams
+					doodle = doodles.getDoodle()
 					console.log()
-					console.log(doodles.getDoodle())
+					console.log(doodle)
 					console.log()
 
-					resolve({ image, log: logs } )
+					resolve({ image, log: logs + '\n' + doodle + '\n' } )
 
 				buildFailure: reject
 				buildStream: (stream) ->
@@ -168,7 +187,10 @@ exports.runBuild = (params, options, getBundleInfo, logStreams) ->
 						logs += data.toString()
 						this.emit('data', data)
 
-					stream.pipe(es.pipe(throughStream, logStreams.build))
+					stream
+					.pipe(throughStream)
+					.pipe(cacheHighlightStream())
+					.pipe(logStreams.build)
 
 			# Create a builder
 			connectOpts = generateConnectOpts(options)