binary: add CLI option to skip cleaning output dist folder

scripts/binary/build.coffee

@@ -36,7 +36,10 @@ smokeTests = {
   linux: runLinuxSmokeTest
 }
 
-module.exports = (platform, version) ->
+# can pass options to better control the build
+# for example
+#   skipClean - do not delete "dist" folder before build
+module.exports = (platform, version, options = {}) ->
   distDir = _.partial(meta.distDir, platform)
   buildDir = _.partial(meta.buildDir, platform)
   buildAppDir = _.partial(meta.buildAppDir, platform)
@@ -46,6 +49,10 @@ module.exports = (platform, version) ->
   cleanupPlatform = ->
     log("#cleanupPlatform")
 
+    if options.skipClean
+      log("skipClean")
+      return
+
     cleanup = =>
       fs.removeAsync(distDir())
 
@@ -175,20 +182,16 @@ module.exports = (platform, version) ->
     smokeTest()
 
   Promise.resolve()
-  .then(cleanupPlatform)
-  .then(buildPackages)
-  .then(copyPackages)
-  .then(npmInstallPackages)
-  .then(createRootPackage)
-  .then(symlinkPackages)
-  .then(convertCoffeeToJs)
-  .then(removeTypeScript)
-  .then(cleanJs)
-  .then(symlinkDistPackages)
-  .then(@obfuscate)
-  .then(@cleanupSrc)
-  .then(@npmInstall)
-  .then(@npmInstall)
+  # .then(cleanupPlatform)
+  # .then(buildPackages)
+  # .then(copyPackages)
+  # .then(npmInstallPackages)
+  # .then(createRootPackage)
+  # .then(symlinkPackages)
+  # .then(convertCoffeeToJs)
+  # .then(removeTypeScript)
+  # .then(cleanJs)
+  # .then(symlinkDistPackages)
   .then(elBuilder)
   .then(symlinkBuildPackages)
   .then(runSmokeTest)

scripts/binary/index.coffee

@@ -9,6 +9,7 @@ Promise  = require("bluebird")
 minimist = require("minimist")
 la       = require("lazy-ass")
 check    = require("check-more-types")
+debug    = require("debug")("cypress:binary")
 
 zip      = require("./zip")
 ask      = require("./ask")
@@ -77,11 +78,21 @@ deploy = {
   #   (new Platform(platform, options))
 
   parseOptions: (argv) ->
-    opts = minimist(argv)
+    opts = minimist(argv, {
+      boolean: ["skip-clean"]
+      default: {
+        "skip-clean": false
+      }
+      alias: {
+        skipClean: "skip-clean"
+      }
+    })
     opts.runTests = false if opts["skip-tests"]
     if not opts.platform and os.platform() == "linux"
       # only can build Linux on Linux
       opts.platform = "linux"
+    debug("parsed command line options")
+    debug(opts)
     opts
 
   bump: ->
@@ -118,7 +129,7 @@ deploy = {
     if !options then options = @parseOptions(process.argv)
     askMissingOptions(['version', 'platform'])(options)
     .then () ->
-      build(options.platform, options.version)
+      build(options.platform, options.version, options)
 
   zip: (options) ->
     console.log('#zip')