1/*
2Copyright The Helm Authors.
3
4Licensed under the Apache License, Version 2.0 (the "License");
5you may not use this file except in compliance with the License.
6You may obtain a copy of the License at
7
8    http://www.apache.org/licenses/LICENSE-2.0
9
10Unless required by applicable law or agreed to in writing, software
11distributed under the License is distributed on an "AS IS" BASIS,
12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13See the License for the specific language governing permissions and
14limitations under the License.
15*/
16
17package main
18
19import (
20	"io"
21	"strings"
22
23	"github.com/gosuri/uitable"
24	"github.com/pkg/errors"
25	"github.com/spf13/cobra"
26
27	"helm.sh/helm/v3/cmd/helm/require"
28	"helm.sh/helm/v3/pkg/cli/output"
29	"helm.sh/helm/v3/pkg/repo"
30)
31
32func newRepoListCmd(out io.Writer) *cobra.Command {
33	var outfmt output.Format
34	cmd := &cobra.Command{
35		Use:     "list",
36		Aliases: []string{"ls"},
37		Short:   "list chart repositories",
38		Args:    require.NoArgs,
39		RunE: func(cmd *cobra.Command, args []string) error {
40			f, err := repo.LoadFile(settings.RepositoryConfig)
41			if isNotExist(err) || len(f.Repositories) == 0 {
42				return errors.New("no repositories to show")
43			}
44
45			return outfmt.Write(out, &repoListWriter{f.Repositories})
46		},
47	}
48
49	bindOutputFlag(cmd, &outfmt)
50
51	return cmd
52}
53
54type repositoryElement struct {
55	Name string `json:"name"`
56	URL  string `json:"url"`
57}
58
59type repoListWriter struct {
60	repos []*repo.Entry
61}
62
63func (r *repoListWriter) WriteTable(out io.Writer) error {
64	table := uitable.New()
65	table.AddRow("NAME", "URL")
66	for _, re := range r.repos {
67		table.AddRow(re.Name, re.URL)
68	}
69	return output.EncodeTable(out, table)
70}
71
72func (r *repoListWriter) WriteJSON(out io.Writer) error {
73	return r.encodeByFormat(out, output.JSON)
74}
75
76func (r *repoListWriter) WriteYAML(out io.Writer) error {
77	return r.encodeByFormat(out, output.YAML)
78}
79
80func (r *repoListWriter) encodeByFormat(out io.Writer, format output.Format) error {
81	// Initialize the array so no results returns an empty array instead of null
82	repolist := make([]repositoryElement, 0, len(r.repos))
83
84	for _, re := range r.repos {
85		repolist = append(repolist, repositoryElement{Name: re.Name, URL: re.URL})
86	}
87
88	switch format {
89	case output.JSON:
90		return output.EncodeJSON(out, repolist)
91	case output.YAML:
92		return output.EncodeYAML(out, repolist)
93	}
94
95	// Because this is a non-exported function and only called internally by
96	// WriteJSON and WriteYAML, we shouldn't get invalid types
97	return nil
98}
99
100// Returns all repos from repos, except those with names matching ignoredRepoNames
101// Inspired by https://stackoverflow.com/a/28701031/893211
102func filterRepos(repos []*repo.Entry, ignoredRepoNames []string) []*repo.Entry {
103	// if ignoredRepoNames is nil, just return repo
104	if ignoredRepoNames == nil {
105		return repos
106	}
107
108	filteredRepos := make([]*repo.Entry, 0)
109
110	ignored := make(map[string]bool, len(ignoredRepoNames))
111	for _, repoName := range ignoredRepoNames {
112		ignored[repoName] = true
113	}
114
115	for _, repo := range repos {
116		if _, removed := ignored[repo.Name]; !removed {
117			filteredRepos = append(filteredRepos, repo)
118		}
119	}
120
121	return filteredRepos
122}
123
124// Provide dynamic auto-completion for repo names
125func compListRepos(prefix string, ignoredRepoNames []string) []string {
126	var rNames []string
127
128	f, err := repo.LoadFile(settings.RepositoryConfig)
129	if err == nil && len(f.Repositories) > 0 {
130		filteredRepos := filterRepos(f.Repositories, ignoredRepoNames)
131		for _, repo := range filteredRepos {
132			if strings.HasPrefix(repo.Name, prefix) {
133				rNames = append(rNames, repo.Name)
134			}
135		}
136	}
137	return rNames
138}
139