Change buildrun create command to have random name

There could be the use case that a user will run multiple buildruns
while due to frequent changes during development cycles. It can be
cumbersome to come up with a unused name for the buildrun every time.

Change code to accept either one or no buildrun name. In case none is
provided, come up with a random name for the buildrun.

pkg/shp/cmd/buildrun/create.go

@@ -2,13 +2,15 @@ package buildrun
 
 import (
 	"fmt"
+	"strings"
 
 	buildv1alpha1 "github.com/shipwright-io/build/pkg/apis/build/v1alpha1"
 	"github.com/shipwright-io/cli/pkg/shp/cmd/runner"
 	"github.com/shipwright-io/cli/pkg/shp/flags"
 	"github.com/shipwright-io/cli/pkg/shp/params"
 	"github.com/shipwright-io/cli/pkg/shp/resource"
 	"github.com/spf13/cobra"
+	"k8s.io/apimachinery/pkg/util/rand"
 	"k8s.io/cli-runtime/pkg/genericclioptions"
 )
 
@@ -35,11 +37,26 @@ func (c *CreateCommand) Cmd() *cobra.Command {
 // Complete checks if the arguments is informing the BuildRun name.
 func (c *CreateCommand) Complete(params *params.Params, args []string) error {
 	switch len(args) {
+	case 0:
+		var randomName = func(name, suffix string) string {
+			return fmt.Sprintf("%s%s-%s", name, suffix, rand.String(5))
+		}
+
+		switch {
+		case strings.HasSuffix(c.buildRunSpec.BuildRef.Name, "build"):
+			c.name = randomName(c.buildRunSpec.BuildRef.Name, "run")
+
+		default:
+			c.name = randomName(c.buildRunSpec.BuildRef.Name, "-buildrun")
+		}
+
 	case 1:
 		c.name = args[0]
+
 	default:
-		return fmt.Errorf("wrong amount of arguments, expected only one")
+		return fmt.Errorf("wrong amount of arguments, expected only one (specific name) or none (random name)")
 	}
+
 	return nil
 }
 

vendor/modules.txt

@@ -261,6 +261,7 @@ k8s.io/apimachinery/pkg/util/json
 k8s.io/apimachinery/pkg/util/mergepatch
 k8s.io/apimachinery/pkg/util/naming
 k8s.io/apimachinery/pkg/util/net
+k8s.io/apimachinery/pkg/util/rand
 k8s.io/apimachinery/pkg/util/runtime
 k8s.io/apimachinery/pkg/util/sets
 k8s.io/apimachinery/pkg/util/strategicpatch