-
Notifications
You must be signed in to change notification settings - Fork 219
/
cli.go
212 lines (165 loc) · 6.23 KB
/
cli.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
// Package cli implements the command line interface.
package cli
import (
"context"
"errors"
"fmt"
"html/template"
"os"
"runtime/debug"
"strings"
"time"
"github.com/AlecAivazis/survey/v2/terminal"
"github.com/MakeNowJust/heredoc/v2"
"github.com/kr/text"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"github.com/superfly/flyctl/internal/flag/flagnames"
"github.com/superfly/flyctl/internal/flyerr"
"github.com/superfly/flyctl/internal/metrics"
"github.com/superfly/flyctl/internal/task"
"golang.org/x/term"
"github.com/superfly/flyctl/iostreams"
"github.com/superfly/graphql"
"github.com/superfly/flyctl/internal/httptracing"
"github.com/superfly/flyctl/internal/logger"
term2 "github.com/superfly/flyctl/terminal"
"github.com/superfly/flyctl/internal/command/root"
)
// Run runs the command line interface with the given arguments and reports the
// exit code the application should exit with.
func Run(ctx context.Context, io *iostreams.IOStreams, args ...string) int {
ctx = iostreams.NewContext(ctx, io)
err := logger.InitLogFile()
if err != nil {
term2.Debugf("failed to initialize file logger: %s", err)
} else {
defer func() {
err := logger.CloseLogFile()
if err != nil {
term2.Debugf("failed to close file logger: %s", err)
}
}()
}
ctx = logger.NewContext(ctx, logger.FromEnv(io.ErrOut).AndLogToFile())
// initialize the background task runner early so command preparers can start running stuff immediately
ctx = task.NewWithContext(ctx)
httptracing.Init()
defer httptracing.Finish()
cmd := root.New()
cmd.SetOut(io.Out)
cmd.SetErr(io.ErrOut)
cmd.SetArgs(args)
cmd.SilenceErrors = true
// configure help templates and helpers
cobra.AddTemplateFuncs(template.FuncMap{
"wrapFlagUsages": wrapFlagUsages,
"wrapText": wrapText,
})
cmd.SetUsageTemplate(usageTemplate)
cmd.SetHelpTemplate(helpTemplate)
cs := io.ColorScheme()
cmd, err = cmd.ExecuteContextC(ctx)
if err != nil {
metrics.RecordCommandFinish(cmd)
}
// shutdown background tasks, giving up to 5s for them to finish
task.FromContext(ctx).ShutdownWithTimeout(5 * time.Second)
switch {
case err == nil:
return 0
case errors.Is(err, context.Canceled), errors.Is(err, terminal.InterruptErr):
return 127
case errors.Is(err, context.DeadlineExceeded):
printError(io, cs, cmd, err)
return 126
case isUnchangedError(err):
// This means the deployment was a noop, which is noteworthy but not something we should
// fail CI on. Print a warning and exit 0. Remove this once we're fully on Machines!
printError(io, cs, cmd, err)
return 0
default:
printError(io, cs, cmd, err)
_, _, e := cmd.Find(args)
if e != nil {
fmt.Printf("Run '%v --help' for usage.\n", cmd.CommandPath())
fmt.Println()
}
return 1
}
}
// isUnchangedError returns true if the error returned is an UNCHANGED GraphQL error.
// Remove this once we're fully on Machines!
func isUnchangedError(err error) bool {
var gqlErr *graphql.GraphQLError
if errors.As(err, &gqlErr) {
return gqlErr.Extensions.Code == "UNCHANGED"
}
return false
}
func printError(io *iostreams.IOStreams, cs *iostreams.ColorScheme, cmd *cobra.Command, err error) {
fmt.Fprint(io.ErrOut, cs.Red("Error: "), err.Error(), "\n")
if description := flyerr.GetErrorDescription(err); description != "" && err.Error() != description {
fmt.Fprintln(io.ErrOut, description)
fmt.Fprintln(io.ErrOut)
}
if suggestion := flyerr.GetErrorSuggestion(err); suggestion != "" {
fmt.Fprintln(io.ErrOut, suggestion)
fmt.Fprintln(io.ErrOut)
}
if docURL := flyerr.GetErrorDocUrl(err); docURL != "" {
fmt.Fprintln(io.ErrOut, "View more information at ", docURL)
fmt.Fprintln(io.ErrOut)
}
if bool, err := cmd.Flags().GetBool(flagnames.Debug); err == nil && bool {
fmt.Fprintf(io.ErrOut, "Stacktrace:\n%s\n", debug.Stack())
}
}
// TODO: remove this once generation of the docs has been refactored.
func NewRootCommand() *cobra.Command {
return root.New()
}
func wrapFlagUsages(cmd *pflag.FlagSet) string {
width := helpWidth()
return cmd.FlagUsagesWrapped(width - 1)
}
func wrapText(s string) string {
width := helpWidth()
return strings.TrimSpace(text.Wrap(heredoc.Doc(s), width-1))
}
func helpWidth() int {
fd := int(os.Stdout.Fd())
width := 80
// Get the terminal width and dynamically set
termWidth, _, err := term.GetSize(fd)
if err == nil {
width = termWidth
}
return min(120, width)
}
// identical to the default cobra help template, but utilizes wrapText
// https://github.com/spf13/cobra/blob/fd865a44e3c48afeb6a6dbddadb8a5519173e029/command.go#L580-L582
const helpTemplate = `{{with (or .Long .Short)}}{{. | trimTrailingWhitespaces | wrapText}}
{{end}}{{if or .Runnable .HasSubCommands}}{{.UsageString}}{{end}}`
// identical to the default cobra usage template, but utilizes wrapFlagUsages
// https://github.com/spf13/cobra/blob/fd865a44e3c48afeb6a6dbddadb8a5519173e029/command.go#L539-L568
const usageTemplate = `Usage:{{if .Runnable}}
{{.UseLine}}{{end}}{{if .HasAvailableSubCommands}}
{{.CommandPath}} [command]{{end}}{{if gt (len .Aliases) 0}}
Aliases:
{{.NameAndAliases}}{{end}}{{if .HasExample}}
Examples:
{{.Example}}{{end}}{{if .HasAvailableSubCommands}}{{$cmds := .Commands}}{{if eq (len .Groups) 0}}
Available Commands:{{range $cmds}}{{if (or .IsAvailableCommand (eq .Name "help"))}}
{{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{else}}{{range $group := .Groups}}
{{.Title}}{{range $cmds}}{{if (and (eq .GroupID $group.ID) (or .IsAvailableCommand (eq .Name "help")))}}
{{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{if not .AllChildCommandsHaveGroup}}
Additional Commands:{{range $cmds}}{{if (and (eq .GroupID "") (or .IsAvailableCommand (eq .Name "help")))}}
{{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{end}}{{end}}{{if .HasAvailableLocalFlags}}
Flags:
{{wrapFlagUsages .LocalFlags | trimTrailingWhitespaces}}{{end}}{{if .HasAvailableInheritedFlags}}
Global Flags:
{{wrapFlagUsages .InheritedFlags | trimTrailingWhitespaces}}{{end}}{{if .HasHelpSubCommands}}
Additional help topics:{{range .Commands}}{{if .IsAdditionalHelpTopicCommand}}
{{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableSubCommands}}
Use "{{.CommandPath}} [command] --help" for more information about a command.{{end}}`