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489 lines (433 loc) · 12.3 KB
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Copy pathflags.go
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489 lines (433 loc) · 12.3 KB
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package types
import (
"flag"
"fmt"
"io"
"reflect"
"strings"
"time"
"github.com/onsi/ginkgo/v2/formatter"
)
type GinkgoFlag struct {
Name string
KeyPath string
SectionKey string
Usage string
UsageArgument string
UsageDefaultValue string
DeprecatedName string
DeprecatedDocLink string
DeprecatedVersion string
ExportAs string
}
type GinkgoFlags []GinkgoFlag
func (f GinkgoFlags) CopyAppend(flags ...GinkgoFlag) GinkgoFlags {
out := GinkgoFlags{}
out = append(out, f...)
out = append(out, flags...)
return out
}
func (f GinkgoFlags) WithPrefix(prefix string) GinkgoFlags {
if prefix == "" {
return f
}
out := GinkgoFlags{}
for _, flag := range f {
if flag.Name != "" {
flag.Name = prefix + "." + flag.Name
}
if flag.DeprecatedName != "" {
flag.DeprecatedName = prefix + "." + flag.DeprecatedName
}
if flag.ExportAs != "" {
flag.ExportAs = prefix + "." + flag.ExportAs
}
out = append(out, flag)
}
return out
}
func (f GinkgoFlags) SubsetWithNames(names ...string) GinkgoFlags {
out := GinkgoFlags{}
for _, flag := range f {
for _, name := range names {
if flag.Name == name {
out = append(out, flag)
break
}
}
}
return out
}
type GinkgoFlagSection struct {
Key string
Style string
Succinct bool
Heading string
Description string
}
type GinkgoFlagSections []GinkgoFlagSection
func (gfs GinkgoFlagSections) Lookup(key string) (GinkgoFlagSection, bool) {
for _, section := range gfs {
if section.Key == key {
return section, true
}
}
return GinkgoFlagSection{}, false
}
type GinkgoFlagSet struct {
flags GinkgoFlags
bindings interface{}
sections GinkgoFlagSections
extraGoFlagsSection GinkgoFlagSection
flagSet *flag.FlagSet
}
// Call NewGinkgoFlagSet to create GinkgoFlagSet that creates and binds to it's own *flag.FlagSet
func NewGinkgoFlagSet(flags GinkgoFlags, bindings interface{}, sections GinkgoFlagSections) (GinkgoFlagSet, error) {
return bindFlagSet(GinkgoFlagSet{
flags: flags,
bindings: bindings,
sections: sections,
}, nil)
}
// Call NewGinkgoFlagSet to create GinkgoFlagSet that extends an existing *flag.FlagSet
func NewAttachedGinkgoFlagSet(flagSet *flag.FlagSet, flags GinkgoFlags, bindings interface{}, sections GinkgoFlagSections, extraGoFlagsSection GinkgoFlagSection) (GinkgoFlagSet, error) {
return bindFlagSet(GinkgoFlagSet{
flags: flags,
bindings: bindings,
sections: sections,
extraGoFlagsSection: extraGoFlagsSection,
}, flagSet)
}
func bindFlagSet(f GinkgoFlagSet, flagSet *flag.FlagSet) (GinkgoFlagSet, error) {
if flagSet == nil {
f.flagSet = flag.NewFlagSet("", flag.ContinueOnError)
//suppress all output as Ginkgo is responsible for formatting usage
f.flagSet.SetOutput(io.Discard)
} else {
f.flagSet = flagSet
//we're piggybacking on an existing flagset (typically go test) so we have limited control
//on user feedback
f.flagSet.Usage = f.substituteUsage
}
for _, flag := range f.flags {
name := flag.Name
deprecatedUsage := "[DEPRECATED]"
deprecatedName := flag.DeprecatedName
if name != "" {
deprecatedUsage = fmt.Sprintf("[DEPRECATED] use --%s instead", name)
} else if flag.Usage != "" {
deprecatedUsage += " " + flag.Usage
}
value, ok := valueAtKeyPath(f.bindings, flag.KeyPath)
if !ok {
return GinkgoFlagSet{}, fmt.Errorf("could not load KeyPath: %s", flag.KeyPath)
}
iface, addr := value.Interface(), value.Addr().Interface()
switch value.Type() {
case reflect.TypeOf(string("")):
if name != "" {
f.flagSet.StringVar(addr.(*string), name, iface.(string), flag.Usage)
}
if deprecatedName != "" {
f.flagSet.StringVar(addr.(*string), deprecatedName, iface.(string), deprecatedUsage)
}
case reflect.TypeOf(int64(0)):
if name != "" {
f.flagSet.Int64Var(addr.(*int64), name, iface.(int64), flag.Usage)
}
if deprecatedName != "" {
f.flagSet.Int64Var(addr.(*int64), deprecatedName, iface.(int64), deprecatedUsage)
}
case reflect.TypeOf(float64(0)):
if name != "" {
f.flagSet.Float64Var(addr.(*float64), name, iface.(float64), flag.Usage)
}
if deprecatedName != "" {
f.flagSet.Float64Var(addr.(*float64), deprecatedName, iface.(float64), deprecatedUsage)
}
case reflect.TypeOf(int(0)):
if name != "" {
f.flagSet.IntVar(addr.(*int), name, iface.(int), flag.Usage)
}
if deprecatedName != "" {
f.flagSet.IntVar(addr.(*int), deprecatedName, iface.(int), deprecatedUsage)
}
case reflect.TypeOf(bool(true)):
if name != "" {
f.flagSet.BoolVar(addr.(*bool), name, iface.(bool), flag.Usage)
}
if deprecatedName != "" {
f.flagSet.BoolVar(addr.(*bool), deprecatedName, iface.(bool), deprecatedUsage)
}
case reflect.TypeOf(time.Duration(0)):
if name != "" {
f.flagSet.DurationVar(addr.(*time.Duration), name, iface.(time.Duration), flag.Usage)
}
if deprecatedName != "" {
f.flagSet.DurationVar(addr.(*time.Duration), deprecatedName, iface.(time.Duration), deprecatedUsage)
}
case reflect.TypeOf([]string{}):
if name != "" {
f.flagSet.Var(stringSliceVar{value}, name, flag.Usage)
}
if deprecatedName != "" {
f.flagSet.Var(stringSliceVar{value}, deprecatedName, deprecatedUsage)
}
default:
return GinkgoFlagSet{}, fmt.Errorf("unsupported type %T", iface)
}
}
return f, nil
}
func (f GinkgoFlagSet) IsZero() bool {
return f.flagSet == nil
}
func (f GinkgoFlagSet) WasSet(name string) bool {
found := false
f.flagSet.Visit(func(f *flag.Flag) {
if f.Name == name {
found = true
}
})
return found
}
func (f GinkgoFlagSet) Lookup(name string) *flag.Flag {
return f.flagSet.Lookup(name)
}
func (f GinkgoFlagSet) Parse(args []string) ([]string, error) {
if f.IsZero() {
return args, nil
}
err := f.flagSet.Parse(args)
if err != nil {
return []string{}, err
}
return f.flagSet.Args(), nil
}
func (f GinkgoFlagSet) ValidateDeprecations(deprecationTracker *DeprecationTracker) {
if f.IsZero() {
return
}
f.flagSet.Visit(func(flag *flag.Flag) {
for _, ginkgoFlag := range f.flags {
if ginkgoFlag.DeprecatedName != "" && strings.HasSuffix(flag.Name, ginkgoFlag.DeprecatedName) {
message := fmt.Sprintf("--%s is deprecated", ginkgoFlag.DeprecatedName)
if ginkgoFlag.Name != "" {
message = fmt.Sprintf("--%s is deprecated, use --%s instead", ginkgoFlag.DeprecatedName, ginkgoFlag.Name)
} else if ginkgoFlag.Usage != "" {
message += " " + ginkgoFlag.Usage
}
deprecationTracker.TrackDeprecation(Deprecation{
Message: message,
DocLink: ginkgoFlag.DeprecatedDocLink,
Version: ginkgoFlag.DeprecatedVersion,
})
}
}
})
}
func (f GinkgoFlagSet) Usage() string {
if f.IsZero() {
return ""
}
groupedFlags := map[GinkgoFlagSection]GinkgoFlags{}
ungroupedFlags := GinkgoFlags{}
managedFlags := map[string]bool{}
extraGoFlags := []*flag.Flag{}
for _, flag := range f.flags {
managedFlags[flag.Name] = true
managedFlags[flag.DeprecatedName] = true
if flag.Name == "" {
continue
}
section, ok := f.sections.Lookup(flag.SectionKey)
if ok {
groupedFlags[section] = append(groupedFlags[section], flag)
} else {
ungroupedFlags = append(ungroupedFlags, flag)
}
}
f.flagSet.VisitAll(func(flag *flag.Flag) {
if !managedFlags[flag.Name] {
extraGoFlags = append(extraGoFlags, flag)
}
})
out := ""
for _, section := range f.sections {
flags := groupedFlags[section]
if len(flags) == 0 {
continue
}
out += f.usageForSection(section)
if section.Succinct {
succinctFlags := []string{}
for _, flag := range flags {
if flag.Name != "" {
succinctFlags = append(succinctFlags, fmt.Sprintf("--%s", flag.Name))
}
}
out += formatter.Fiw(1, formatter.COLS, section.Style+strings.Join(succinctFlags, ", ")+"{{/}}\n")
} else {
for _, flag := range flags {
out += f.usageForFlag(flag, section.Style)
}
}
out += "\n"
}
if len(ungroupedFlags) > 0 {
for _, flag := range ungroupedFlags {
out += f.usageForFlag(flag, "")
}
out += "\n"
}
if len(extraGoFlags) > 0 {
out += f.usageForSection(f.extraGoFlagsSection)
for _, goFlag := range extraGoFlags {
out += f.usageForGoFlag(goFlag)
}
}
return out
}
func (f GinkgoFlagSet) substituteUsage() {
fmt.Fprintln(f.flagSet.Output(), f.Usage())
}
func valueAtKeyPath(root interface{}, keyPath string) (reflect.Value, bool) {
if len(keyPath) == 0 {
return reflect.Value{}, false
}
val := reflect.ValueOf(root)
components := strings.Split(keyPath, ".")
for _, component := range components {
val = reflect.Indirect(val)
switch val.Kind() {
case reflect.Map:
val = val.MapIndex(reflect.ValueOf(component))
if val.Kind() == reflect.Interface {
val = reflect.ValueOf(val.Interface())
}
case reflect.Struct:
val = val.FieldByName(component)
default:
return reflect.Value{}, false
}
if (val == reflect.Value{}) {
return reflect.Value{}, false
}
}
return val, true
}
func (f GinkgoFlagSet) usageForSection(section GinkgoFlagSection) string {
out := formatter.F(section.Style + "{{bold}}{{underline}}" + section.Heading + "{{/}}\n")
if section.Description != "" {
out += formatter.Fiw(0, formatter.COLS, section.Description+"\n")
}
return out
}
func (f GinkgoFlagSet) usageForFlag(flag GinkgoFlag, style string) string {
argument := flag.UsageArgument
defValue := flag.UsageDefaultValue
if argument == "" {
value, _ := valueAtKeyPath(f.bindings, flag.KeyPath)
switch value.Type() {
case reflect.TypeOf(string("")):
argument = "string"
case reflect.TypeOf(int64(0)), reflect.TypeOf(int(0)):
argument = "int"
case reflect.TypeOf(time.Duration(0)):
argument = "duration"
case reflect.TypeOf(float64(0)):
argument = "float"
case reflect.TypeOf([]string{}):
argument = "string"
}
}
if argument != "" {
argument = "[" + argument + "] "
}
if defValue != "" {
defValue = fmt.Sprintf("(default: %s)", defValue)
}
hyphens := "--"
if len(flag.Name) == 1 {
hyphens = "-"
}
out := formatter.Fi(1, style+"%s%s{{/}} %s{{gray}}%s{{/}}\n", hyphens, flag.Name, argument, defValue)
out += formatter.Fiw(2, formatter.COLS, "{{light-gray}}%s{{/}}\n", flag.Usage)
return out
}
func (f GinkgoFlagSet) usageForGoFlag(goFlag *flag.Flag) string {
//Taken directly from the flag package
out := fmt.Sprintf(" -%s", goFlag.Name)
name, usage := flag.UnquoteUsage(goFlag)
if len(name) > 0 {
out += " " + name
}
if len(out) <= 4 {
out += "\t"
} else {
out += "\n \t"
}
out += strings.ReplaceAll(usage, "\n", "\n \t")
out += "\n"
return out
}
type stringSliceVar struct {
slice reflect.Value
}
func (ssv stringSliceVar) String() string { return "" }
func (ssv stringSliceVar) Set(s string) error {
ssv.slice.Set(reflect.AppendSlice(ssv.slice, reflect.ValueOf([]string{s})))
return nil
}
//given a set of GinkgoFlags and bindings, generate flag arguments suitable to be passed to an application with that set of flags configured.
func GenerateFlagArgs(flags GinkgoFlags, bindings interface{}) ([]string, error) {
result := []string{}
for _, flag := range flags {
name := flag.ExportAs
if name == "" {
name = flag.Name
}
if name == "" {
continue
}
value, ok := valueAtKeyPath(bindings, flag.KeyPath)
if !ok {
return []string{}, fmt.Errorf("could not load KeyPath: %s", flag.KeyPath)
}
iface := value.Interface()
switch value.Type() {
case reflect.TypeOf(string("")):
if iface.(string) != "" {
result = append(result, fmt.Sprintf("--%s=%s", name, iface))
}
case reflect.TypeOf(int64(0)):
if iface.(int64) != 0 {
result = append(result, fmt.Sprintf("--%s=%d", name, iface))
}
case reflect.TypeOf(float64(0)):
if iface.(float64) != 0 {
result = append(result, fmt.Sprintf("--%s=%f", name, iface))
}
case reflect.TypeOf(int(0)):
if iface.(int) != 0 {
result = append(result, fmt.Sprintf("--%s=%d", name, iface))
}
case reflect.TypeOf(bool(true)):
if iface.(bool) {
result = append(result, fmt.Sprintf("--%s", name))
}
case reflect.TypeOf(time.Duration(0)):
if iface.(time.Duration) != time.Duration(0) {
result = append(result, fmt.Sprintf("--%s=%s", name, iface))
}
case reflect.TypeOf([]string{}):
strings := iface.([]string)
for _, s := range strings {
result = append(result, fmt.Sprintf("--%s=%s", name, s))
}
default:
return []string{}, fmt.Errorf("unsupported type %T", iface)
}
}
return result, nil
}