Enhancements to Revel command

Reformat of code
Allow user to use a mix of command line arguments and flags
Enhance the import tool to detect missing packages in the modules side
Added test cases for all commands

skeleton/app/init.go

@@ -0,0 +1,59 @@
+package app
+
+import (
+	"github.com/revel/revel"
+)
+
+var (
+	// AppVersion revel app version (ldflags)
+	AppVersion string
+
+	// BuildTime revel app build-time (ldflags)
+	BuildTime string
+)
+
+func init() {
+	// Filters is the default set of global filters.
+	revel.Filters = []revel.Filter{
+		revel.PanicFilter,             // Recover from panics and display an error page instead.
+		revel.RouterFilter,            // Use the routing table to select the right Action
+		revel.FilterConfiguringFilter, // A hook for adding or removing per-Action filters.
+		revel.ParamsFilter,            // Parse parameters into Controller.Params.
+		revel.SessionFilter,           // Restore and write the session cookie.
+		revel.FlashFilter,             // Restore and write the flash cookie.
+		revel.ValidationFilter,        // Restore kept validation errors and save new ones from cookie.
+		revel.I18nFilter,              // Resolve the requested language
+		HeaderFilter,                  // Add some security based headers
+		revel.InterceptorFilter,       // Run interceptors around the action.
+		revel.CompressFilter,          // Compress the result.
+		revel.BeforeAfterFilter,       // Call the before and after filter functions
+		revel.ActionInvoker,           // Invoke the action.
+	}
+
+	// Register startup functions with OnAppStart
+	// revel.DevMode and revel.RunMode only work inside of OnAppStart. See Example Startup Script
+	// ( order dependent )
+	// revel.OnAppStart(ExampleStartupScript)
+	// revel.OnAppStart(InitDB)
+	// revel.OnAppStart(FillCache)
+}
+
+// HeaderFilter adds common security headers
+// There is a full implementation of a CSRF filter in
+// https://github.com/revel/modules/tree/master/csrf
+var HeaderFilter = func(c *revel.Controller, fc []revel.Filter) {
+	c.Response.Out.Header().Add("X-Frame-Options", "SAMEORIGIN")
+	c.Response.Out.Header().Add("X-XSS-Protection", "1; mode=block")
+	c.Response.Out.Header().Add("X-Content-Type-Options", "nosniff")
+	c.Response.Out.Header().Add("Referrer-Policy", "strict-origin-when-cross-origin")
+
+	fc[0](c, fc[1:]) // Execute the next filter stage.
+}
+
+//func ExampleStartupScript() {
+//	// revel.DevMod and revel.RunMode work here
+//	// Use this script to check for dev mode and set dev/prod startup scripts here!
+//	if revel.DevMode == true {
+//		// Dev mode
+//	}
+//}