-
Notifications
You must be signed in to change notification settings - Fork 61
/
help.go
242 lines (209 loc) · 7.03 KB
/
help.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
// SPDX-License-Identifier: MIT
//
// Copyright (c) 2019 GitHub Inc.
// 2022 Unikraft GmbH.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package cmdutil
import (
"bytes"
"fmt"
"strings"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"kraftkit.sh/internal/cmdfactory"
"kraftkit.sh/internal/text"
)
func rootUsageFunc(command *cobra.Command) error {
command.Printf("Usage: %s", command.UseLine())
subcommands := command.Commands()
if len(subcommands) > 0 {
command.Print("\n\nAvailable commands:\n")
for _, c := range subcommands {
if c.Hidden {
continue
}
command.Printf(" %s\n", c.Name())
}
return nil
}
// TODO: Introduce flag groupings (e.g. "Global Flags" and "Subcommand Flags")
flagUsages := command.LocalFlags().FlagUsagesWrapped(80)
if flagUsages != "" {
command.Println("\n\nFlags:")
command.Print(text.Indent(dedent(flagUsages), " "))
}
return nil
}
func rootFlagErrorFunc(cmd *cobra.Command, err error) error {
if err == pflag.ErrHelp {
return err
}
return FlagErrorWrap(err)
}
var hasFailed bool
// HasFailed signals that the main process should exit with non-zero status
func HasFailed() bool {
return hasFailed
}
// Display helpful error message in case subcommand name was mistyped.
// This matches Cobra's behavior for root command, which Cobra
// confusingly doesn't apply to nested commands.
func nestedSuggestFunc(command *cobra.Command, arg string) {
command.Printf("unknown command %q for %q\n", arg, command.CommandPath())
var candidates []string
if arg == "help" {
candidates = []string{"--help"}
} else {
if command.SuggestionsMinimumDistance <= 0 {
command.SuggestionsMinimumDistance = 2
}
candidates = command.SuggestionsFor(arg)
}
if len(candidates) > 0 {
command.Print("\nDid you mean this?\n")
for _, c := range candidates {
command.Printf("\t%s\n", c)
}
}
command.Print("\n")
_ = rootUsageFunc(command)
}
func isRootCmd(command *cobra.Command) bool {
return command != nil && !command.HasParent()
}
func rootHelpFunc(f *cmdfactory.Factory, command *cobra.Command, args []string) {
cs := f.IOStreams.ColorScheme()
if isRootCmd(command.Parent()) && len(args) >= 2 && args[1] != "--help" && args[1] != "-h" {
nestedSuggestFunc(command, args[1])
hasFailed = true
return
}
coreCommands := []string{}
actionsCommands := []string{}
additionalCommands := []string{}
for _, c := range command.Commands() {
if c.Short == "" {
continue
}
if c.Hidden {
continue
}
s := rpad(c.Name()+":", c.NamePadding()) + c.Short
if _, ok := c.Annotations["IsCore"]; ok {
coreCommands = append(coreCommands, s)
} else if _, ok := c.Annotations["IsActions"]; ok {
actionsCommands = append(actionsCommands, s)
} else {
additionalCommands = append(additionalCommands, s)
}
}
// If there are no core commands, assume everything is a core command
if len(coreCommands) == 0 {
coreCommands = additionalCommands
additionalCommands = []string{}
}
type helpEntry struct {
Title string
Body string
}
longText := command.Long
if longText == "" {
longText = command.Short
}
if longText != "" && command.LocalFlags().Lookup("jq") != nil {
longText = strings.TrimRight(longText, "\n") +
"\n\nFor more information about output formatting flags, see `gh help formatting`."
}
helpEntries := []helpEntry{}
if longText != "" {
helpEntries = append(helpEntries, helpEntry{"", longText})
}
helpEntries = append(helpEntries, helpEntry{"USAGE", command.UseLine()})
if len(coreCommands) > 0 {
helpEntries = append(helpEntries, helpEntry{"CORE COMMANDS", strings.Join(coreCommands, "\n")})
}
if len(actionsCommands) > 0 {
helpEntries = append(helpEntries, helpEntry{"ACTIONS COMMANDS", strings.Join(actionsCommands, "\n")})
}
if len(additionalCommands) > 0 {
helpEntries = append(helpEntries, helpEntry{"ADDITIONAL COMMANDS", strings.Join(additionalCommands, "\n")})
}
flagUsages := command.LocalFlags().FlagUsagesWrapped(80)
if flagUsages != "" {
helpEntries = append(helpEntries, helpEntry{"FLAGS", dedent(flagUsages)})
}
inheritedFlagUsages := command.InheritedFlags().FlagUsagesWrapped(80)
if inheritedFlagUsages != "" {
helpEntries = append(helpEntries, helpEntry{"INHERITED FLAGS", dedent(inheritedFlagUsages)})
}
if _, ok := command.Annotations["help:arguments"]; ok {
helpEntries = append(helpEntries, helpEntry{"ARGUMENTS", command.Annotations["help:arguments"]})
}
if command.Example != "" {
helpEntries = append(helpEntries, helpEntry{"EXAMPLES", command.Example})
}
if _, ok := command.Annotations["help:environment"]; ok {
helpEntries = append(helpEntries, helpEntry{"ENVIRONMENT VARIABLES", command.Annotations["help:environment"]})
}
helpEntries = append(helpEntries, helpEntry{"LEARN MORE", fmt.Sprintf(`
Use '%s <command> <subcommand> --help' for more information about a command.
Read the manual at https://unikraft.org/docs/`, f.RootCmd.Name())})
if _, ok := command.Annotations["help:feedback"]; ok {
helpEntries = append(helpEntries, helpEntry{"FEEDBACK", command.Annotations["help:feedback"]})
}
out := command.OutOrStdout()
for _, e := range helpEntries {
if e.Title != "" {
// If there is a title, add indentation to each line in the body
fmt.Fprintln(out, cs.Bold(e.Title))
fmt.Fprintln(out, text.Indent(strings.Trim(e.Body, "\r\n"), " "))
} else {
// If there is no title print the body as is
fmt.Fprintln(out, e.Body)
}
fmt.Fprintln(out)
}
}
// rpad adds padding to the right of a string.
func rpad(s string, padding int) string {
template := fmt.Sprintf("%%-%ds ", padding)
return fmt.Sprintf(template, s)
}
func dedent(s string) string {
lines := strings.Split(s, "\n")
minIndent := -1
for _, l := range lines {
if len(l) == 0 {
continue
}
indent := len(l) - len(strings.TrimLeft(l, " "))
if minIndent == -1 || indent < minIndent {
minIndent = indent
}
}
if minIndent <= 0 {
return s
}
var buf bytes.Buffer
for _, l := range lines {
fmt.Fprintln(&buf, strings.TrimPrefix(l, strings.Repeat(" ", minIndent)))
}
return strings.TrimSuffix(buf.String(), "\n")
}