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@ -74,7 +74,8 @@ type GenericFlag struct {
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// help text to the user (uses the String() method of the generic flag to show
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// the value)
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func (f GenericFlag) String() string {
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s %v\t%v", prefixedNames(f.Name), f.FormatValueHelp(), f.Usage))
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placeholder, usage := unquoteUsage(f.Usage)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s %v\t%v", prefixedNames(f.Name, placeholder), f.FormatValueHelp(), usage))
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}
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func (f GenericFlag) FormatValueHelp() string {
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@ -143,7 +144,8 @@ type StringSliceFlag struct {
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func (f StringSliceFlag) String() string {
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firstName := strings.Trim(strings.Split(f.Name, ",")[0], " ")
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pref := prefixFor(firstName)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s [%v]\t%v", prefixedNames(f.Name), pref+firstName+" option "+pref+firstName+" option", f.Usage))
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placeholder, usage := unquoteUsage(f.Usage)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s [%v]\t%v", prefixedNames(f.Name, placeholder), pref+firstName+" option "+pref+firstName+" option", usage))
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}
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// Apply populates the flag given the flag set and environment
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@ -212,7 +214,8 @@ type IntSliceFlag struct {
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func (f IntSliceFlag) String() string {
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firstName := strings.Trim(strings.Split(f.Name, ",")[0], " ")
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pref := prefixFor(firstName)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s [%v]\t%v", prefixedNames(f.Name), pref+firstName+" option "+pref+firstName+" option", f.Usage))
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placeholder, usage := unquoteUsage(f.Usage)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s [%v]\t%v", prefixedNames(f.Name, placeholder), pref+firstName+" option "+pref+firstName+" option", usage))
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}
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// Apply populates the flag given the flag set and environment
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@ -257,7 +260,8 @@ type BoolFlag struct {
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// String returns a readable representation of this value (for usage defaults)
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func (f BoolFlag) String() string {
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name), f.Usage))
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placeholder, usage := unquoteUsage(f.Usage)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name, placeholder), usage))
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}
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// Apply populates the flag given the flag set and environment
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@ -300,7 +304,8 @@ type BoolTFlag struct {
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// String returns a readable representation of this value (for usage defaults)
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func (f BoolTFlag) String() string {
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name), f.Usage))
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placeholder, usage := unquoteUsage(f.Usage)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name, placeholder), usage))
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}
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// Apply populates the flag given the flag set and environment
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@ -343,7 +348,8 @@ type StringFlag struct {
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// String returns the usage
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func (f StringFlag) String() string {
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s %v\t%v", prefixedNames(f.Name), f.FormatValueHelp(), f.Usage))
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placeholder, usage := unquoteUsage(f.Usage)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s %v\t%v", prefixedNames(f.Name, placeholder), f.FormatValueHelp(), usage))
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}
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func (f StringFlag) FormatValueHelp() string {
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@ -391,7 +397,8 @@ type IntFlag struct {
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// String returns the usage
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func (f IntFlag) String() string {
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage))
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placeholder, usage := unquoteUsage(f.Usage)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name, placeholder), f.Value, usage))
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}
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// Apply populates the flag given the flag set and environment
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@ -434,7 +441,8 @@ type DurationFlag struct {
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// String returns a readable representation of this value (for usage defaults)
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func (f DurationFlag) String() string {
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage))
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placeholder, usage := unquoteUsage(f.Usage)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name, placeholder), f.Value, usage))
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}
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// Apply populates the flag given the flag set and environment
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@ -477,7 +485,8 @@ type Float64Flag struct {
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// String returns the usage
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func (f Float64Flag) String() string {
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage))
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placeholder, usage := unquoteUsage(f.Usage)
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return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name, placeholder), f.Value, usage))
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}
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// Apply populates the flag given the flag set and environment
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@ -517,16 +526,37 @@ func prefixFor(name string) (prefix string) {
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return
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}
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func prefixedNames(fullName string) (prefixed string) {
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// Returns the placeholder, if any, and the unquoted usage string.
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func unquoteUsage(usage string) (string, string) {
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for i := 0; i < len(usage); i++ {
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if usage[i] == '`' {
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for j := i + 1; j < len(usage); j++ {
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if usage[j] == '`' {
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name := usage[i+1 : j]
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usage = usage[:i] + name + usage[j+1:]
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return name, usage
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}
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}
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break
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}
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}
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return "", usage
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}
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func prefixedNames(fullName, placeholder string) string {
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var prefixed string
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parts := strings.Split(fullName, ",")
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for i, name := range parts {
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name = strings.Trim(name, " ")
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prefixed += prefixFor(name) + name
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if placeholder != "" {
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prefixed += " " + placeholder
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}
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if i < len(parts)-1 {
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prefixed += ", "
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}
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}
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return
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return prefixed
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}
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func withEnvHint(envVar, str string) string {
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