[cypress.rake] Add cypress.env.json generation

Cypress handles environment variables itself, so `process.env` isn't
available.

As a result, "Option 2" is what is being done here:

https://docs.cypress.io/guides/guides/environment-variables.html#Option-2-cypress-env-json

which makes sure a default config file exists as part of the `setup`
step for running the specs.  A `file` task is used here to only run it
if the file doesn't exist, but makes it a dependency for the `:setup`
task.

By default, screenshots are disabledin CI, but enabled in dev.

The cypress.env.json file is also ignored by git, so local edits can
happen and can be customized for each developer.  On CI, it will just be
copied in and the defaults from `.cypress.ci.env.json` will be what is
conifigured in that environment.

.cypress.ci.env.json

@@ -0,0 +1,3 @@
+{
+  "disable_screenshots": "true"
+}

.cypress.dev.env.json

@@ -0,0 +1,3 @@
+{
+  "disable_screenshots": "false"
+}

.gitignore

@@ -21,3 +21,4 @@ config/webpack/paths.json
 *.sw[po]
 cypress/screenshots
 cypress/videos
+cypress.env.json

cypress/support/index.js

@@ -19,8 +19,6 @@ import './commands'
 // Alternatively you can use CommonJS syntax:
 // require('./commands')
 
-const { env } = require('process')
-
-if (env.TRAVIS || env.CI) {
-  Cypress.Screenshot.defaults({screenshotOnRunFailure: false})
-}
+Cypress.Screenshot.defaults({
+  screenshotOnRunFailure: !(Cypress.env('disable_screenshots') == 'true')
+})

lib/tasks/manageiq/cypress.rake

@@ -1,3 +1,5 @@
+CYPRESS_ENV_FILE = File.expand_path(File.join("..", "..", "..", "cypress.env.json"), __dir__) unless defined?(CYPRESS_ENV_FILE)
+
 namespace :cypress do
   desc "Run cypress tests"
   task :ui => 'ui:run'
@@ -25,11 +27,21 @@ namespace :cypress do
       Rake::Task["#{app_prefix}integration:stop_server"].invoke
     end
 
-    task :setup do |rake_task|
+    task :setup => CYPRESS_ENV_FILE do |rake_task|
       app_prefix = rake_task.name.chomp('cypress:ui:setup')
       Rake::Task["#{app_prefix}integration:start_server"].invoke
     end
 
+    file CYPRESS_ENV_FILE do |cypress_env_json_file|
+      unless File.exist?(CYPRESS_ENV_FILE)
+        cypress_dir         = File.dirname(CYPRESS_ENV_FILE)
+        cypress_env_example = ".cypress.dev.env.json"
+        cypress_env_example = ".cypress.ci.env.json" if ENV['CI'] || ENV['TRAVIS']
+
+        cp File.join(cypress_dir, cypress_env_example), cypress_env_json_file.name
+      end
+    end
+
     desc "Run cypress tests in 'development' mode"
     task :dev => 'dev:run'