Add server endpoint to list applications (#379)

Will be used for cloud shell installer health indicators, and maybe local installer

Author: michaeljguarino

pkg/application/waiter.go

@@ -16,6 +16,21 @@ const (
 	waitTime = 5 * 60 * time.Second
 )
 
+func ListAll(kubeConf *rest.Config) ([]v1beta1.Application, error) {
+	apps, err := NewForConfig(kubeConf)
+	if err != nil {
+		return nil, err
+	}
+
+	client := apps.Applications("")
+	l, err := client.List(context.Background(), metav1.ListOptions{})
+	if err != nil {
+		return nil, err
+	}
+
+	return l.Items, nil
+}
+
 func Waiter(kubeConf *rest.Config, repo string, appFunc func(app *v1beta1.Application) (bool, error), timeout func() error) error {
 	conf := config.Read()
 	ctx := context.Background()

pkg/server/applications.go

@@ -0,0 +1,25 @@
+package server
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/pluralsh/plural/pkg/application"
+	"github.com/pluralsh/plural/pkg/kubernetes"
+)
+
+func listApplications(c *gin.Context) error {
+	kubeConf, err := kubernetes.KubeConfig()
+	if err != nil {
+		return err
+	}
+
+	apps, err := application.ListAll(kubeConf)
+	if err != nil {
+		return err
+	}
+
+	c.Header("Content-Type", "application/json")
+	c.JSON(http.StatusOK, apps)
+	return nil
+}

pkg/server/server.go

@@ -20,6 +20,7 @@ func SetUpRouter() *gin.Engine {
 		v1.POST("/setup", serverFunc(setupCli))
 		v1.GET("/health", healthcheck)
 		v1.GET("/configuration", serverFunc(configuration))
+		v1.GET("/applications", serverFunc(listApplications))
 		v1.POST("/context/configuration", serverFunc(contextConfiguration))
 	}
 	return r