flux2/cmd/flux/get.go

/*
Copyright 2020 The Flux authors

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package main

import (
	"context"
	"os"

	"github.com/spf13/cobra"
	apimeta "k8s.io/apimachinery/pkg/api/meta"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"sigs.k8s.io/controller-runtime/pkg/client"

	"github.com/fluxcd/pkg/apis/meta"

	"github.com/fluxcd/flux2/internal/utils"
)

var getCmd = &cobra.Command{
	Use:   "get",
	Short: "Get sources and resources",
	Long:  "The get sub-commands print the statuses of sources and resources.",
}

var allNamespaces bool

func init() {
	getCmd.PersistentFlags().BoolVarP(&allNamespaces, "all-namespaces", "A", false,
		"list the requested object(s) across all namespaces")
	rootCmd.AddCommand(getCmd)
}

type summarisable interface {
	objectContainer
	Len() int
	SummariseAt(i int, includeNamespace bool) []string
	Headers(includeNamespace bool) []string
}

// --- these help with implementations of summarisable

func statusAndMessage(conditions []metav1.Condition) (string, string) {
	if c := apimeta.FindStatusCondition(conditions, meta.ReadyCondition); c != nil {
		return string(c.Status), c.Message
	}
	return string(metav1.ConditionFalse), "waiting to be reconciled"
}

type named interface {
	GetName() string
	GetNamespace() string
}

func nameColumns(item named, includeNamespace bool) []string {
	if includeNamespace {
		return []string{item.GetNamespace(), item.GetName()}
	}
	return []string{item.GetName()}
}

var namespaceHeader = []string{"Namespace"}

type getCommand struct {
	headers []string
	list    summarisable
}

func (get getCommand) run(cmd *cobra.Command, args []string) error {
	ctx, cancel := context.WithTimeout(context.Background(), timeout)
	defer cancel()

	kubeClient, err := utils.KubeClient(kubeconfig, kubecontext)
	if err != nil {
		return err
	}

	var listOpts []client.ListOption
	if !allNamespaces {
		listOpts = append(listOpts, client.InNamespace(namespace))
	}
	err = kubeClient.List(ctx, get.list.AsClientObject(), listOpts...)
	if err != nil {
		return err
	}

	if get.list.Len() == 0 {
		logger.Failuref("no imagerepository objects found in %s namespace", namespace)
		return nil
	}

	header := get.list.Headers(allNamespaces)
	var rows [][]string
	for i := 0; i < get.list.Len(); i++ {
		row := get.list.SummariseAt(i, allNamespaces)
		rows = append(rows, row)
	}
	utils.PrintTable(os.Stdout, header, rows)
	return nil
}