Added godocs to public methods. (#386)

* Added godocs to public methods.

* Fix gofmt formatting.

bash_completions.go

@@ -10,6 +10,7 @@ import (
 	"github.com/spf13/pflag"
 )
 
+// Annotations for Bash completion.
 const (
 	BashCompFilenameExt     = "cobra_annotation_bash_completion_filename_extensions"
 	BashCompCustom          = "cobra_annotation_bash_completion_custom"
@@ -566,6 +567,7 @@ func gen(cmd *Command, w io.Writer) error {
 	return nil
 }
 
+// GenBashCompletion generates bash completion file and writes to the passed writer.
 func (cmd *Command) GenBashCompletion(w io.Writer) error {
 	if err := preamble(w, cmd.Name()); err != nil {
 		return err
@@ -585,6 +587,7 @@ func nonCompletableFlag(flag *pflag.Flag) bool {
 	return flag.Hidden || len(flag.Deprecated) > 0
 }
 
+// GenBashCompletionFile generates bash completion file.
 func (cmd *Command) GenBashCompletionFile(filename string) error {
 	outFile, err := os.Create(filename)
 	if err != nil {

cobra.go

@@ -37,7 +37,8 @@ var templateFuncs = template.FuncMap{
 
 var initializers []func()
 
-// Automatic prefix matching can be a dangerous thing to automatically enable in CLI tools.
+// EnablePrefixMatching allows to set automatic prefix matching. Automatic prefix matching can be a dangerous thing
+// to automatically enable in CLI tools.
 // Set this to true to enable it.
 var EnablePrefixMatching = false
 

command.go

@@ -129,7 +129,7 @@ type Command struct {
 	DisableFlagParsing bool
 }
 
-// os.Args[1:] by default, if desired, can be overridden
+// SetArgs sets arguments for the command. It is set to os.Args[1:] by default, if desired, can be overridden
 // particularly useful when testing.
 func (c *Command) SetArgs(a []string) {
 	c.args = a
@@ -141,12 +141,12 @@ func (c *Command) SetOutput(output io.Writer) {
 	c.output = &output
 }
 
-// Usage can be defined by application.
+// SetUsageFunc sets usage function. Usage can be defined by application.
 func (c *Command) SetUsageFunc(f func(*Command) error) {
 	c.usageFunc = f
 }
 
-// Can be defined by Application.
+// SetUsageTemplate sets usage template. Can be defined by Application.
 func (c *Command) SetUsageTemplate(s string) {
 	c.usageTemplate = s
 }
@@ -157,16 +157,17 @@ func (c *Command) SetFlagErrorFunc(f func(*Command, error) error) {
 	c.flagErrorFunc = f
 }
 
-// Can be defined by Application
+// SetHelpFunc sets help function. Can be defined by Application
 func (c *Command) SetHelpFunc(f func(*Command, []string)) {
 	c.helpFunc = f
 }
 
+// SetHelpCommand sets help command.
 func (c *Command) SetHelpCommand(cmd *Command) {
 	c.helpCommand = cmd
 }
 
-// Can be defined by Application.
+// SetHelpTemplate sets help template to be used. Application can use it to set custom template.
 func (c *Command) SetHelpTemplate(s string) {
 	c.helpTemplate = s
 }
@@ -183,10 +184,12 @@ func (c *Command) SetGlobalNormalizationFunc(n func(f *flag.FlagSet, name string
 	}
 }
 
+// OutOrStdout returns output to stdout
 func (c *Command) OutOrStdout() io.Writer {
 	return c.getOut(os.Stdout)
 }
 
+// OutOrStderr returns output to stderr
 func (c *Command) OutOrStderr() io.Writer {
 	return c.getOut(os.Stderr)
 }
@@ -265,6 +268,7 @@ func (c *Command) Help() error {
 	return nil
 }
 
+// UsageString return usage string.
 func (c *Command) UsageString() string {
 	tmpOutput := c.output
 	bb := new(bytes.Buffer)
@@ -292,6 +296,7 @@ func (c *Command) FlagErrorFunc() (f func(*Command, error) error) {
 
 var minUsagePadding = 25
 
+// UsagePadding return padding for the usage.
 func (c *Command) UsagePadding() int {
 	if c.parent == nil || minUsagePadding > c.parent.commandsMaxUseLen {
 		return minUsagePadding
@@ -301,7 +306,7 @@ func (c *Command) UsagePadding() int {
 
 var minCommandPathPadding = 11
 
-//
+// CommandPathPadding return padding for the command path.
 func (c *Command) CommandPathPadding() int {
 	if c.parent == nil || minCommandPathPadding > c.parent.commandsMaxCommandPathLen {
 		return minCommandPathPadding
@@ -311,6 +316,7 @@ func (c *Command) CommandPathPadding() int {
 
 var minNamePadding = 11
 
+// NamePadding returns padding for the name.
 func (c *Command) NamePadding() int {
 	if c.parent == nil || minNamePadding > c.parent.commandsMaxNameLen {
 		return minNamePadding
@@ -318,6 +324,7 @@ func (c *Command) NamePadding() int {
 	return c.parent.commandsMaxNameLen
 }
 
+// UsageTemplate returns usage template for the command.
 func (c *Command) UsageTemplate() string {
 	if c.usageTemplate != "" {
 		return c.usageTemplate
@@ -353,6 +360,7 @@ Use "{{.CommandPath}} [command] --help" for more information about a command.{{e
 `
 }
 
+// HelpTemplate return help template for the command.
 func (c *Command) HelpTemplate() string {
 	if c.helpTemplate != "" {
 		return c.helpTemplate
@@ -447,7 +455,7 @@ func argsMinusFirstX(args []string, x string) []string {
 	return args
 }
 
-// find the target command given the args and command tree
+// Find finds the target command given the args and command tree
 // Meant to be run on the highest node. Only searches down.
 func (c *Command) Find(args []string) (*Command, []string, error) {
 	if c == nil {
@@ -515,6 +523,7 @@ func (c *Command) Find(args []string) (*Command, []string, error) {
 	return commandFound, a, nil
 }
 
+// SuggestionsFor provides suggestions for the typedName.
 func (c *Command) SuggestionsFor(typedName string) []string {
 	suggestions := []string{}
 	for _, cmd := range c.commands {
@@ -535,6 +544,7 @@ func (c *Command) SuggestionsFor(typedName string) []string {
 	return suggestions
 }
 
+// VisitParents visits all parents of the command and invokes fn on each parent.
 func (c *Command) VisitParents(fn func(*Command)) {
 	var traverse func(*Command) *Command
 
@@ -550,6 +560,7 @@ func (c *Command) VisitParents(fn func(*Command)) {
 	traverse(c)
 }
 
+// Root finds root command.
 func (c *Command) Root() *Command {
 	var findRoot func(*Command) *Command
 
@@ -674,7 +685,7 @@ func (c *Command) errorMsgFromParse() string {
 	return ""
 }
 
-// Call execute to use the args (os.Args[1:] by default)
+// Execute Call execute to use the args (os.Args[1:] by default)
 // and run through the command tree finding appropriate matches
 // for commands and then corresponding flags.
 func (c *Command) Execute() error {
@@ -682,6 +693,7 @@ func (c *Command) Execute() error {
 	return err
 }
 
+// ExecuteC executes the command.
 func (c *Command) ExecuteC() (cmd *Command, err error) {
 
 	// Regardless of what command execute is called on, run on Root only
@@ -779,7 +791,7 @@ func (c *Command) initHelpCmd() {
 	c.AddCommand(c.helpCommand)
 }
 
-// Used for testing.
+// ResetCommands used for testing.
 func (c *Command) ResetCommands() {
 	c.commands = nil
 	c.helpCommand = nil
@@ -902,7 +914,7 @@ func (c *Command) UseLine() string {
 	return str + c.Use
 }
 
-// For use in determining which flags have been assigned to which commands
+// DebugFlags used to determine which flags have been assigned to which commands
 // and which persist.
 func (c *Command) DebugFlags() {
 	c.Println("DebugFlags called on", c.Name())
@@ -970,10 +982,12 @@ func (c *Command) HasAlias(s string) bool {
 	return false
 }
 
+// NameAndAliases returns string containing name and all aliases
 func (c *Command) NameAndAliases() string {
 	return strings.Join(append([]string{c.Name()}, c.Aliases...), ", ")
 }
 
+// HasExample determines if the command has example.
 func (c *Command) HasExample() bool {
 	return len(c.Example) > 0
 }
@@ -1070,7 +1084,7 @@ func (c *Command) GlobalNormalizationFunc() func(f *flag.FlagSet, name string) f
 	return c.globNormFunc
 }
 
-// Flage returns the complete FlagSet that applies
+// Flags returns the complete FlagSet that applies
 // to this command (local and persistent declared here and by all parents).
 func (c *Command) Flags() *flag.FlagSet {
 	if c.flags == nil {
@@ -1170,44 +1184,44 @@ func (c *Command) ResetFlags() {
 	c.pflags.SetOutput(c.flagErrorBuf)
 }
 
-// Does the command contain any flags (local plus persistent from the entire structure).
+// HasFlags checks if the command contains any flags (local plus persistent from the entire structure).
 func (c *Command) HasFlags() bool {
 	return c.Flags().HasFlags()
 }
 
-// Does the command contain persistent flags.
+// HasPersistentFlags checks if the command contains persistent flags.
 func (c *Command) HasPersistentFlags() bool {
 	return c.PersistentFlags().HasFlags()
 }
 
-// Does the command has flags specifically declared locally.
+// HasLocalFlags checks if the command has flags specifically declared locally.
 func (c *Command) HasLocalFlags() bool {
 	return c.LocalFlags().HasFlags()
 }
 
-// Does the command have flags inherited from its parent command.
+// HasInheritedFlags checks if the command has flags inherited from its parent command.
 func (c *Command) HasInheritedFlags() bool {
 	return c.InheritedFlags().HasFlags()
 }
 
-// Does the command contain any flags (local plus persistent from the entire
+// HasAvailableFlags checks if the command contains any flags (local plus persistent from the entire
 // structure) which are not hidden or deprecated.
 func (c *Command) HasAvailableFlags() bool {
 	return c.Flags().HasAvailableFlags()
 }
 
-// Does the command contain persistent flags which are not hidden or deprecated.
+// HasAvailablePersistentFlags checks if the command contains persistent flags which are not hidden or deprecated.
 func (c *Command) HasAvailablePersistentFlags() bool {
 	return c.PersistentFlags().HasAvailableFlags()
 }
 
-// Does the command has flags specifically declared locally which are not hidden
+// HasAvailableLocalFlags checks if the command has flags specifically declared locally which are not hidden
 // or deprecated.
 func (c *Command) HasAvailableLocalFlags() bool {
 	return c.LocalFlags().HasAvailableFlags()
 }
 
-// Does the command have flags inherited from its parent command which are
+// HasAvailableInheritedFlags checks if the command has flags inherited from its parent command which are
 // not hidden or deprecated.
 func (c *Command) HasAvailableInheritedFlags() bool {
 	return c.InheritedFlags().HasAvailableFlags()