/
completer.go
246 lines (216 loc) · 5.39 KB
/
completer.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
package kube
import (
"os"
"strings"
"github.com/c-bata/go-prompt"
"github.com/c-bata/go-prompt/completer"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
)
func NewCompleter() (*Completer, error) {
loadingRules := clientcmd.NewDefaultClientConfigLoadingRules()
loader := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
loadingRules,
&clientcmd.ConfigOverrides{},
)
config, err := loader.ClientConfig()
if err != nil {
return nil, err
}
namespace, _, err := loader.Namespace()
if err != nil {
return nil, err
}
client, err := kubernetes.NewForConfig(config)
if err != nil {
return nil, err
}
namespaces, err := client.CoreV1().Namespaces().List(metav1.ListOptions{})
if err != nil {
if statusError, ok := err.(*errors.StatusError); ok && statusError.Status().Code == 403 {
namespaces = nil
} else {
return nil, err
}
}
return &Completer{
namespace: namespace,
namespaceList: namespaces,
client: client,
}, nil
}
type Completer struct {
namespace string
namespaceList *corev1.NamespaceList
client *kubernetes.Clientset
}
func (c *Completer) Complete(d prompt.Document) []prompt.Suggest {
if d.TextBeforeCursor() == "" {
return []prompt.Suggest{}
}
args := strings.Split(d.TextBeforeCursor(), " ")
w := d.GetWordBeforeCursor()
// If PIPE is in text before the cursor, returns empty suggestions.
for i := range args {
if args[i] == "|" {
return []prompt.Suggest{}
}
}
// If word before the cursor starts with "-", returns CLI flag options.
if strings.HasPrefix(w, "-") {
return optionCompleter(args, strings.HasPrefix(w, "--"))
}
// Return suggestions for option
if suggests, found := c.completeOptionArguments(d); found {
return suggests
}
namespace := checkNamespaceArg(d)
if namespace == "" {
namespace = c.namespace
}
commandArgs, skipNext := excludeOptions(args)
if skipNext {
// when type 'get pod -o ', we don't want to complete pods. we want to type 'json' or other.
// So we need to skip argumentCompleter.
return []prompt.Suggest{}
}
return c.argumentsCompleter(namespace, commandArgs)
}
func checkNamespaceArg(d prompt.Document) string {
args := strings.Split(d.Text, " ")
var found bool
for i := 0; i < len(args); i++ {
if found {
return args[i]
}
if args[i] == "--namespace" || args[i] == "-n" {
found = true
continue
}
}
return ""
}
/* Option arguments */
var yamlFileCompleter = completer.FilePathCompleter{
IgnoreCase: true,
Filter: func(fi os.FileInfo) bool {
if fi.IsDir() {
return true
}
if strings.HasSuffix(fi.Name(), ".yaml") || strings.HasSuffix(fi.Name(), ".yml") {
return true
}
return false
},
}
func getPreviousOption(d prompt.Document) (cmd, option string, found bool) {
args := strings.Split(d.TextBeforeCursor(), " ")
l := len(args)
if l >= 2 {
option = args[l-2]
}
if strings.HasPrefix(option, "-") {
return args[0], option, true
}
return "", "", false
}
func (c *Completer) completeOptionArguments(d prompt.Document) ([]prompt.Suggest, bool) {
cmd, option, found := getPreviousOption(d)
if !found {
return []prompt.Suggest{}, false
}
// namespace
if option == "-n" || option == "--namespace" {
return prompt.FilterHasPrefix(
getNameSpaceSuggestions(c.namespaceList),
d.GetWordBeforeCursor(),
true,
), true
}
// filename
switch cmd {
case "get", "describe", "create", "delete", "replace", "patch",
"edit", "apply", "expose", "rolling-update", "rollout",
"label", "annotate", "scale", "convert", "autoscale", "top":
if option == "-f" || option == "--filename" {
return yamlFileCompleter.Complete(d), true
}
}
// container
switch cmd {
case "exec", "logs", "run", "attach", "port-forward", "cp":
if option == "-c" || option == "--container" {
cmdArgs := getCommandArgs(d)
var suggestions []prompt.Suggest
if cmdArgs == nil || len(cmdArgs) < 2 {
suggestions = getContainerNamesFromCachedPods(c.client, c.namespace)
} else {
suggestions = getContainerName(c.client, c.namespace, cmdArgs[1])
}
return prompt.FilterHasPrefix(
suggestions,
d.GetWordBeforeCursor(),
true,
), true
}
}
return []prompt.Suggest{}, false
}
func getCommandArgs(d prompt.Document) []string {
args := strings.Split(d.TextBeforeCursor(), " ")
// If PIPE is in text before the cursor, returns empty.
for i := range args {
if args[i] == "|" {
return nil
}
}
commandArgs, _ := excludeOptions(args)
return commandArgs
}
func excludeOptions(args []string) ([]string, bool) {
l := len(args)
if l == 0 {
return nil, false
}
cmd := args[0]
filtered := make([]string, 0, l)
var skipNextArg bool
for i := 0; i < len(args); i++ {
if skipNextArg {
skipNextArg = false
continue
}
if cmd == "logs" && args[i] == "-f" {
continue
}
for _, s := range []string{
"-f", "--filename",
"-n", "--namespace",
"-s", "--server",
"--kubeconfig",
"--cluster",
"--user",
"-o", "--output",
"-c",
"--container",
} {
if strings.HasPrefix(args[i], s) {
if strings.Contains(args[i], "=") {
// we can specify option value like '-o=json'
skipNextArg = false
} else {
skipNextArg = true
}
continue
}
}
if strings.HasPrefix(args[i], "-") {
continue
}
filtered = append(filtered, args[i])
}
return filtered, skipNextArg
}