Add "ddev launch" command, fixes #910 (#1862)

* Add DDEV_PRIMARY_URL and make accessible to commands
* Add 'ddev launch' command

cmd/ddev/cmd/commands.go

@@ -108,9 +108,10 @@ func makeHostCmd(app *ddevapp.DdevApp, fullPath, name string) func(*cobra.Comman
 			osArgs = os.Args[2:]
 		}
 		var err error
+		// Load environment variables that may be useful for script.
+		app.DockerEnv()
 		if runtime.GOOS == "windows" {
 			// Sadly, not sure how to have a bash interpreter without this.
-			//bashPath := `C:\Program Files\Git\bin\bash.exe`
 			args := []string{fullPath}
 			args = append(args, osArgs...)
 			err = exec.RunInteractiveCommand(windowsBashPath, args)

cmd/ddev/cmd/dotddev_assets/commands/host/launch

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+## Description: Launch a browser with the current site
+## Usage: launch
+## Example: "ddev launch"
+
+case $OSTYPE in
+  linux-gnu)
+    xdg-open ${DDEV_PRIMARY_URL}
+    ;;
+  "darwin"*)
+    open ${DDEV_PRIMARY_URL}
+    ;;
+  "win*"* | "msys"*)
+    start ${DDEV_PRIMARY_URL}
+    ;;
+esac

pkg/ddevapp/ddevapp.go

@@ -1085,6 +1085,7 @@ func (app *DdevApp) DockerEnv() {
 		"DDEV_ROUTER_HTTP_PORT":         app.RouterHTTPPort,
 		"DDEV_ROUTER_HTTPS_PORT":        app.RouterHTTPSPort,
 		"DDEV_XDEBUG_ENABLED":           strconv.FormatBool(app.XdebugEnabled),
+		"DDEV_PRIMARY_URL":              app.GetPrimaryURL(),
 	}
 
 	// Set the mariadb_local command to empty to prevent docker-compose from complaining normally.
@@ -1459,6 +1460,15 @@ func (app *DdevApp) GetAllURLs() (httpURLs []string, httpsURLs []string, allURLs
 	return httpURLs, httpsURLs, append(httpURLs, httpsURLs...)
 }
 
+// GetPrimaryURL() returns the primary URL that can be used, https or http
+func (app *DdevApp) GetPrimaryURL() string {
+	httpURLs, urlList, _ := app.GetAllURLs()
+	if GetCAROOT() == "" {
+		urlList = httpURLs
+	}
+	return urlList[0]
+}
+
 // GetWebContainerDirectHTTPURL returns the URL that can be used without the router to get to web container.
 func (app *DdevApp) GetWebContainerDirectHTTPURL() string {
 	// Get direct address of web container