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package command
import (
"fmt"
"io"
"os"
"strings"
"github.com/onsi/ginkgo/v2/formatter"
"github.com/onsi/ginkgo/v2/types"
)
type Program struct {
Name string
Heading string
Commands []Command
DefaultCommand Command
DeprecatedCommands []DeprecatedCommand
//For testing - leave as nil in production
OutWriter io.Writer
ErrWriter io.Writer
Exiter func(code int)
}
type DeprecatedCommand struct {
Name string
Deprecation types.Deprecation
}
func (p Program) RunAndExit(osArgs []string) {
var command Command
deprecationTracker := types.NewDeprecationTracker()
if p.Exiter == nil {
p.Exiter = os.Exit
}
if p.OutWriter == nil {
p.OutWriter = formatter.ColorableStdOut
}
if p.ErrWriter == nil {
p.ErrWriter = formatter.ColorableStdErr
}
defer func() {
exitCode := 0
if r := recover(); r != nil {
details, ok := r.(AbortDetails)
if !ok {
panic(r)
}
if details.Error != nil {
fmt.Fprintln(p.ErrWriter, formatter.F("{{red}}{{bold}}%s %s{{/}} {{red}}failed{{/}}", p.Name, command.Name))
fmt.Fprintln(p.ErrWriter, formatter.Fi(1, details.Error.Error()))
}
if details.EmitUsage {
if details.Error != nil {
fmt.Fprintln(p.ErrWriter, "")
}
command.EmitUsage(p.ErrWriter)
}
exitCode = details.ExitCode
}
command.Flags.ValidateDeprecations(deprecationTracker)
if deprecationTracker.DidTrackDeprecations() {
fmt.Fprintln(p.ErrWriter, deprecationTracker.DeprecationsReport())
}
p.Exiter(exitCode)
return
}()
args, additionalArgs := []string{}, []string{}
foundDelimiter := false
for _, arg := range osArgs[1:] {
if !foundDelimiter {
if arg == "--" {
foundDelimiter = true
continue
}
}
if foundDelimiter {
additionalArgs = append(additionalArgs, arg)
} else {
args = append(args, arg)
}
}
command = p.DefaultCommand
if len(args) > 0 {
p.handleHelpRequestsAndExit(p.OutWriter, args)
if command.Name == args[0] {
args = args[1:]
} else {
for _, deprecatedCommand := range p.DeprecatedCommands {
if deprecatedCommand.Name == args[0] {
deprecationTracker.TrackDeprecation(deprecatedCommand.Deprecation)
return
}
}
for _, tryCommand := range p.Commands {
if tryCommand.Name == args[0] {
command, args = tryCommand, args[1:]
break
}
}
}
}
command.Run(args, additionalArgs)
}
func (p Program) handleHelpRequestsAndExit(writer io.Writer, args []string) {
if len(args) == 0 {
return
}
matchesHelpFlag := func(args ...string) bool {
for _, arg := range args {
if arg == "--help" || arg == "-help" || arg == "-h" || arg == "--h" {
return true
}
}
return false
}
if len(args) == 1 {
if args[0] == "help" || matchesHelpFlag(args[0]) {
p.EmitUsage(writer)
Abort(AbortDetails{})
}
} else {
var name string
if args[0] == "help" || matchesHelpFlag(args[0]) {
name = args[1]
} else if matchesHelpFlag(args[1:]...) {
name = args[0]
} else {
return
}
if p.DefaultCommand.Name == name || p.Name == name {
p.DefaultCommand.EmitUsage(writer)
Abort(AbortDetails{})
}
for _, command := range p.Commands {
if command.Name == name {
command.EmitUsage(writer)
Abort(AbortDetails{})
}
}
fmt.Fprintln(writer, formatter.F("{{red}}Unknown Command: {{bold}}%s{{/}}", name))
fmt.Fprintln(writer, "")
p.EmitUsage(writer)
Abort(AbortDetails{ExitCode: 1})
}
return
}
func (p Program) EmitUsage(writer io.Writer) {
fmt.Fprintln(writer, formatter.F(p.Heading))
fmt.Fprintln(writer, formatter.F("{{gray}}%s{{/}}", strings.Repeat("-", len(p.Heading))))
fmt.Fprintln(writer, formatter.F("For usage information for a command, run {{bold}}%s help COMMAND{{/}}.", p.Name))
fmt.Fprintln(writer, formatter.F("For usage information for the default command, run {{bold}}%s help %s{{/}} or {{bold}}%s help %s{{/}}.", p.Name, p.Name, p.Name, p.DefaultCommand.Name))
fmt.Fprintln(writer, "")
fmt.Fprintln(writer, formatter.F("The following commands are available:"))
fmt.Fprintln(writer, formatter.Fi(1, "{{bold}}%s{{/}} or %s {{bold}}%s{{/}} - {{gray}}%s{{/}}", p.Name, p.Name, p.DefaultCommand.Name, p.DefaultCommand.Usage))
if p.DefaultCommand.ShortDoc != "" {
fmt.Fprintln(writer, formatter.Fi(2, p.DefaultCommand.ShortDoc))
}
for _, command := range p.Commands {
fmt.Fprintln(writer, formatter.Fi(1, "{{bold}}%s{{/}} - {{gray}}%s{{/}}", command.Name, command.Usage))
if command.ShortDoc != "" {
fmt.Fprintln(writer, formatter.Fi(2, command.ShortDoc))
}
}
}
|
