WIP: foundations for app deploy

client/stack/stack.go

@@ -0,0 +1,104 @@
+package stack
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+	"unicode"
+
+	abraClient "coopcloud.tech/abra/client"
+	"coopcloud.tech/abra/client/convert"
+	"github.com/docker/cli/opts"
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/filters"
+	"github.com/docker/docker/api/types/swarm"
+	"github.com/docker/docker/client"
+)
+
+type StackStatus struct {
+	Services []swarm.Service
+	Err      error
+}
+
+func getStackFilter(namespace string) filters.Args {
+	filter := filters.NewArgs()
+	filter.Add("label", convert.LabelNamespace+"="+namespace)
+	return filter
+}
+
+func getStackServiceFilter(namespace string) filters.Args {
+	return getStackFilter(namespace)
+}
+
+func getStackFilterFromOpt(namespace string, opt opts.FilterOpt) filters.Args {
+	filter := opt.Value()
+	filter.Add("label", convert.LabelNamespace+"="+namespace)
+	return filter
+}
+
+func getAllStacksFilter() filters.Args {
+	filter := filters.NewArgs()
+	filter.Add("label", convert.LabelNamespace)
+	return filter
+}
+
+func getStackServices(ctx context.Context, apiclient client.APIClient, namespace string) ([]swarm.Service, error) {
+	return apiclient.ServiceList(ctx, types.ServiceListOptions{Filters: getStackServiceFilter(namespace)})
+}
+
+func GetAllDeployedServices(contextName string) StackStatus {
+	cl, err := abraClient.NewClientWithContext(contextName)
+	if err != nil {
+		if strings.Contains(err.Error(), "does not exist") {
+			// No local context found, bail out gracefully
+			return StackStatus{[]swarm.Service{}, nil}
+		}
+		return StackStatus{[]swarm.Service{}, err}
+	}
+	ctx := context.Background()
+	services, err := cl.ServiceList(ctx, types.ServiceListOptions{Filters: getAllStacksFilter()})
+	if err != nil {
+		return StackStatus{[]swarm.Service{}, err}
+	}
+	return StackStatus{services, nil}
+}
+
+func checkDaemonIsSwarmManager(contextName string) error {
+	cl, err := abraClient.NewClientWithContext(contextName)
+	if err != nil {
+		return err
+	}
+	info, err := cl.Info(context.Background())
+	if err != nil {
+		return err
+	}
+	if !info.Swarm.ControlAvailable {
+		return errors.New("this server is not a swarm manager. Did you run \"abra server init\"?")
+	}
+	return nil
+}
+
+// validateStackName checks if the provided string is a valid stack name (namespace).
+// It currently only does a rudimentary check if the string is empty, or consists
+// of only whitespace and quoting characters.
+func validateStackName(namespace string) error {
+	v := strings.TrimFunc(namespace, quotesOrWhitespace)
+	if v == "" {
+		return fmt.Errorf("invalid stack name: %q", namespace)
+	}
+	return nil
+}
+
+func quotesOrWhitespace(r rune) bool {
+	return unicode.IsSpace(r) || r == '"' || r == '\''
+}
+
+func DeployStack(namespace string) {
+}
+
+// TODO: Prune services from stack
+
+func pruneServices() error {
+	return nil
+}