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@ -3,6 +3,7 @@ package cli
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import (
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"flag"
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"fmt"
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"io/ioutil"
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"reflect"
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"runtime"
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"strconv"
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@ -45,6 +46,10 @@ var FlagNamePrefixer FlagNamePrefixFunc = prefixedNames
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// details. This is used by the default FlagStringer.
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var FlagEnvHinter FlagEnvHintFunc = withEnvHint
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// FlagFileHinter annotates flag help message with the environment variable
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// details. This is used by the default FlagStringer.
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var FlagFileHinter FlagFileHintFunc = withFileHint
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// FlagsByName is a slice of Flag.
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type FlagsByName []Flag
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@ -120,15 +125,9 @@ func (f GenericFlag) Apply(set *flag.FlagSet) {
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// provided by the user for parsing by the flag
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func (f GenericFlag) ApplyWithError(set *flag.FlagSet) error {
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val := f.Value
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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if err := val.Set(envVal); err != nil {
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return fmt.Errorf("could not parse %s as value for flag %s: %s", envVal, f.Name, err)
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}
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break
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}
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if fileEnvVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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if err := val.Set(fileEnvVal); err != nil {
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return fmt.Errorf("could not parse %s as value for flag %s: %s", fileEnvVal, f.Name, err)
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}
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}
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@ -171,21 +170,15 @@ func (f StringSliceFlag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f StringSliceFlag) ApplyWithError(set *flag.FlagSet) error {
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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newVal := &StringSlice{}
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for _, s := range strings.Split(envVal, ",") {
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s = strings.TrimSpace(s)
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if err := newVal.Set(s); err != nil {
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return fmt.Errorf("could not parse %s as string value for flag %s: %s", envVal, f.Name, err)
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}
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}
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f.Value = newVal
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break
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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newVal := &StringSlice{}
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for _, s := range strings.Split(envVal, ",") {
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s = strings.TrimSpace(s)
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if err := newVal.Set(s); err != nil {
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return fmt.Errorf("could not parse %s as string value for flag %s: %s", envVal, f.Name, err)
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}
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}
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f.Value = newVal
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}
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eachName(f.Name, func(name string) {
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@ -234,21 +227,15 @@ func (f IntSliceFlag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f IntSliceFlag) ApplyWithError(set *flag.FlagSet) error {
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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newVal := &IntSlice{}
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for _, s := range strings.Split(envVal, ",") {
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s = strings.TrimSpace(s)
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if err := newVal.Set(s); err != nil {
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return fmt.Errorf("could not parse %s as int slice value for flag %s: %s", envVal, f.Name, err)
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}
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}
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f.Value = newVal
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break
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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newVal := &IntSlice{}
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for _, s := range strings.Split(envVal, ",") {
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s = strings.TrimSpace(s)
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if err := newVal.Set(s); err != nil {
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return fmt.Errorf("could not parse %s as int slice value for flag %s: %s", envVal, f.Name, err)
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}
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}
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f.Value = newVal
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}
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eachName(f.Name, func(name string) {
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@ -297,21 +284,15 @@ func (f Int64SliceFlag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f Int64SliceFlag) ApplyWithError(set *flag.FlagSet) error {
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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newVal := &Int64Slice{}
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for _, s := range strings.Split(envVal, ",") {
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s = strings.TrimSpace(s)
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if err := newVal.Set(s); err != nil {
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return fmt.Errorf("could not parse %s as int64 slice value for flag %s: %s", envVal, f.Name, err)
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}
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}
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f.Value = newVal
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break
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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newVal := &Int64Slice{}
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for _, s := range strings.Split(envVal, ",") {
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s = strings.TrimSpace(s)
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if err := newVal.Set(s); err != nil {
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return fmt.Errorf("could not parse %s as int64 slice value for flag %s: %s", envVal, f.Name, err)
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}
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}
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f.Value = newVal
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}
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eachName(f.Name, func(name string) {
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@ -332,23 +313,15 @@ func (f BoolFlag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f BoolFlag) ApplyWithError(set *flag.FlagSet) error {
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val := false
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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if envVal == "" {
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val = false
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break
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}
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envValBool, err := strconv.ParseBool(envVal)
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if err != nil {
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return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
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}
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val = envValBool
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break
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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if envVal == "" {
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val = false
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} else {
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envValBool, err := strconv.ParseBool(envVal)
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if err != nil {
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return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
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}
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val = envValBool
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}
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}
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@ -372,23 +345,16 @@ func (f BoolTFlag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f BoolTFlag) ApplyWithError(set *flag.FlagSet) error {
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val := true
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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if envVal == "" {
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val = false
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break
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}
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envValBool, err := strconv.ParseBool(envVal)
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if err != nil {
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return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
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}
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val = envValBool
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break
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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if envVal == "" {
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val = false
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} else {
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envValBool, err := strconv.ParseBool(envVal)
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if err != nil {
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return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
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}
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val = envValBool
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}
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}
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@ -411,14 +377,8 @@ func (f StringFlag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f StringFlag) ApplyWithError(set *flag.FlagSet) error {
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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f.Value = envVal
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break
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}
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}
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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f.Value = envVal
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}
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eachName(f.Name, func(name string) {
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@ -440,18 +400,12 @@ func (f IntFlag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f IntFlag) ApplyWithError(set *flag.FlagSet) error {
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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envValInt, err := strconv.ParseInt(envVal, 0, 64)
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if err != nil {
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return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
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}
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f.Value = int(envValInt)
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break
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}
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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envValInt, err := strconv.ParseInt(envVal, 0, 64)
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if err != nil {
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return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
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}
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f.Value = int(envValInt)
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}
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eachName(f.Name, func(name string) {
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@ -473,19 +427,13 @@ func (f Int64Flag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f Int64Flag) ApplyWithError(set *flag.FlagSet) error {
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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envValInt, err := strconv.ParseInt(envVal, 0, 64)
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if err != nil {
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return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
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}
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f.Value = envValInt
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break
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}
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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envValInt, err := strconv.ParseInt(envVal, 0, 64)
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if err != nil {
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return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
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}
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f.Value = envValInt
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}
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eachName(f.Name, func(name string) {
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@ -507,19 +455,13 @@ func (f UintFlag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f UintFlag) ApplyWithError(set *flag.FlagSet) error {
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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envValInt, err := strconv.ParseUint(envVal, 0, 64)
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if err != nil {
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return fmt.Errorf("could not parse %s as uint value for flag %s: %s", envVal, f.Name, err)
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}
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f.Value = uint(envValInt)
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break
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}
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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envValInt, err := strconv.ParseUint(envVal, 0, 64)
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if err != nil {
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return fmt.Errorf("could not parse %s as uint value for flag %s: %s", envVal, f.Name, err)
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}
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f.Value = uint(envValInt)
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}
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eachName(f.Name, func(name string) {
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@ -541,19 +483,13 @@ func (f Uint64Flag) Apply(set *flag.FlagSet) {
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// ApplyWithError populates the flag given the flag set and environment
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func (f Uint64Flag) ApplyWithError(set *flag.FlagSet) error {
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if f.EnvVar != "" {
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for _, envVar := range strings.Split(f.EnvVar, ",") {
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envVar = strings.TrimSpace(envVar)
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if envVal, ok := syscall.Getenv(envVar); ok {
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envValInt, err := strconv.ParseUint(envVal, 0, 64)
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if err != nil {
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return fmt.Errorf("could not parse %s as uint64 value for flag %s: %s", envVal, f.Name, err)
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}
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f.Value = uint64(envValInt)
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break
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}
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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envValInt, err := strconv.ParseUint(envVal, 0, 64)
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if err != nil {
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return fmt.Errorf("could not parse %s as uint64 value for flag %s: %s", envVal, f.Name, err)
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|
|
|
}
|
|
|
|
|
|
|
|
|
|
f.Value = uint64(envValInt)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
eachName(f.Name, func(name string) {
|
|
|
|
@ -575,19 +511,13 @@ func (f DurationFlag) Apply(set *flag.FlagSet) {
|
|
|
|
|
|
|
|
|
|
// ApplyWithError populates the flag given the flag set and environment
|
|
|
|
|
func (f DurationFlag) ApplyWithError(set *flag.FlagSet) error {
|
|
|
|
|
if f.EnvVar != "" {
|
|
|
|
|
for _, envVar := range strings.Split(f.EnvVar, ",") {
|
|
|
|
|
envVar = strings.TrimSpace(envVar)
|
|
|
|
|
if envVal, ok := syscall.Getenv(envVar); ok {
|
|
|
|
|
envValDuration, err := time.ParseDuration(envVal)
|
|
|
|
|
if err != nil {
|
|
|
|
|
return fmt.Errorf("could not parse %s as duration for flag %s: %s", envVal, f.Name, err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
f.Value = envValDuration
|
|
|
|
|
break
|
|
|
|
|
}
|
|
|
|
|
if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
|
|
|
|
|
envValDuration, err := time.ParseDuration(envVal)
|
|
|
|
|
if err != nil {
|
|
|
|
|
return fmt.Errorf("could not parse %s as duration for flag %s: %s", envVal, f.Name, err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
f.Value = envValDuration
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
eachName(f.Name, func(name string) {
|
|
|
|
@ -609,19 +539,13 @@ func (f Float64Flag) Apply(set *flag.FlagSet) {
|
|
|
|
|
|
|
|
|
|
// ApplyWithError populates the flag given the flag set and environment
|
|
|
|
|
func (f Float64Flag) ApplyWithError(set *flag.FlagSet) error {
|
|
|
|
|
if f.EnvVar != "" {
|
|
|
|
|
for _, envVar := range strings.Split(f.EnvVar, ",") {
|
|
|
|
|
envVar = strings.TrimSpace(envVar)
|
|
|
|
|
if envVal, ok := syscall.Getenv(envVar); ok {
|
|
|
|
|
envValFloat, err := strconv.ParseFloat(envVal, 10)
|
|
|
|
|
if err != nil {
|
|
|
|
|
return fmt.Errorf("could not parse %s as float64 value for flag %s: %s", envVal, f.Name, err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
f.Value = float64(envValFloat)
|
|
|
|
|
break
|
|
|
|
|
}
|
|
|
|
|
if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
|
|
|
|
|
envValFloat, err := strconv.ParseFloat(envVal, 10)
|
|
|
|
|
if err != nil {
|
|
|
|
|
return fmt.Errorf("could not parse %s as float64 value for flag %s: %s", envVal, f.Name, err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
f.Value = float64(envValFloat)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
eachName(f.Name, func(name string) {
|
|
|
|
@ -705,6 +629,14 @@ func withEnvHint(envVar, str string) string {
|
|
|
|
|
return str + envText
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func withFileHint(filePath, str string) string {
|
|
|
|
|
fileText := ""
|
|
|
|
|
if filePath != "" {
|
|
|
|
|
fileText = fmt.Sprintf(" [%s]", filePath)
|
|
|
|
|
}
|
|
|
|
|
return str + fileText
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func flagValue(f Flag) reflect.Value {
|
|
|
|
|
fv := reflect.ValueOf(f)
|
|
|
|
|
for fv.Kind() == reflect.Ptr {
|
|
|
|
@ -718,14 +650,29 @@ func stringifyFlag(f Flag) string {
|
|
|
|
|
|
|
|
|
|
switch f.(type) {
|
|
|
|
|
case IntSliceFlag:
|
|
|
|
|
return FlagEnvHinter(fv.FieldByName("EnvVar").String(),
|
|
|
|
|
stringifyIntSliceFlag(f.(IntSliceFlag)))
|
|
|
|
|
return FlagFileHinter(
|
|
|
|
|
fv.FieldByName("FilePath").String(),
|
|
|
|
|
FlagEnvHinter(
|
|
|
|
|
fv.FieldByName("EnvVar").String(),
|
|
|
|
|
stringifyIntSliceFlag(f.(IntSliceFlag)),
|
|
|
|
|
),
|
|
|
|
|
)
|
|
|
|
|
case Int64SliceFlag:
|
|
|
|
|
return FlagEnvHinter(fv.FieldByName("EnvVar").String(),
|
|
|
|
|
stringifyInt64SliceFlag(f.(Int64SliceFlag)))
|
|
|
|
|
return FlagFileHinter(
|
|
|
|
|
fv.FieldByName("FilePath").String(),
|
|
|
|
|
FlagEnvHinter(
|
|
|
|
|
fv.FieldByName("EnvVar").String(),
|
|
|
|
|
stringifyInt64SliceFlag(f.(Int64SliceFlag)),
|
|
|
|
|
),
|
|
|
|
|
)
|
|
|
|
|
case StringSliceFlag:
|
|
|
|
|
return FlagEnvHinter(fv.FieldByName("EnvVar").String(),
|
|
|
|
|
stringifyStringSliceFlag(f.(StringSliceFlag)))
|
|
|
|
|
return FlagFileHinter(
|
|
|
|
|
fv.FieldByName("FilePath").String(),
|
|
|
|
|
FlagEnvHinter(
|
|
|
|
|
fv.FieldByName("EnvVar").String(),
|
|
|
|
|
stringifyStringSliceFlag(f.(StringSliceFlag)),
|
|
|
|
|
),
|
|
|
|
|
)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
placeholder, usage := unquoteUsage(fv.FieldByName("Usage").String())
|
|
|
|
@ -752,8 +699,13 @@ func stringifyFlag(f Flag) string {
|
|
|
|
|
|
|
|
|
|
usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultValueString))
|
|
|
|
|
|
|
|
|
|
return FlagEnvHinter(fv.FieldByName("EnvVar").String(),
|
|
|
|
|
fmt.Sprintf("%s\t%s", FlagNamePrefixer(fv.FieldByName("Name").String(), placeholder), usageWithDefault))
|
|
|
|
|
return FlagFileHinter(
|
|
|
|
|
fv.FieldByName("FilePath").String(),
|
|
|
|
|
FlagEnvHinter(
|
|
|
|
|
fv.FieldByName("EnvVar").String(),
|
|
|
|
|
fmt.Sprintf("%s\t%s", FlagNamePrefixer(fv.FieldByName("Name").String(), placeholder), usageWithDefault),
|
|
|
|
|
),
|
|
|
|
|
)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func stringifyIntSliceFlag(f IntSliceFlag) string {
|
|
|
|
@ -805,3 +757,18 @@ func stringifySliceFlag(usage, name string, defaultVals []string) string {
|
|
|
|
|
usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultVal))
|
|
|
|
|
return fmt.Sprintf("%s\t%s", FlagNamePrefixer(name, placeholder), usageWithDefault)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func flagFromFileEnv(filePath, envName string) (val string, ok bool) {
|
|
|
|
|
for _, envVar := range strings.Split(envName, ",") {
|
|
|
|
|
envVar = strings.TrimSpace(envVar)
|
|
|
|
|
if envVal, ok := syscall.Getenv(envVar); ok {
|
|
|
|
|
return envVal, true
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
for _, fileVar := range strings.Split(filePath, ",") {
|
|
|
|
|
if data, err := ioutil.ReadFile(fileVar); err == nil {
|
|
|
|
|
return string(data), true
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return "", false
|
|
|
|
|
}
|
|
|
|
|