Documentation ¶
Overview ¶
Package cmdline provides command line option handling.
Index ¶
- Variables
- func Copyright() string
- func LongVersion() string
- func Parse(command string) ([]string, error)
- func ResolveCopyrightYears() string
- func ShortVersion() string
- type Cmd
- type CmdLine
- func (cl *CmdLine) AddCommand(cmd Cmd)
- func (cl *CmdLine) DisplayUsage()
- func (cl *CmdLine) FatalError(err error)
- func (cl *CmdLine) FatalIfError(err error)
- func (cl *CmdLine) FatalMsg(msg string)
- func (cl *CmdLine) NewGeneralOption(value any) *Option
- func (cl *CmdLine) NewOption(value Value) *Option
- func (cl *CmdLine) Parse(args []string) []string
- func (cl *CmdLine) RunCommand(args []string) error
- func (cl *CmdLine) SetWriter(w io.Writer)
- func (cl *CmdLine) Write(p []byte) (n int, err error)
- type GeneralValue
- type Option
- type Options
- type Value
Constants ¶
This section is empty.
Variables ¶
var ( // AppCmdName holds the application's name as specified on the command line. AppCmdName string // AppName holds the name of the application. By default, this is the same as AppCmdName. AppName string // CopyrightYears holds the years to place in the copyright banner. Instead of setting this explicitly, consider // using CopyrightStartYear and CopyrightEndYear instead. For example, setting CopyrightStartYear early in your // main() method, and allowing the build system to populate CopyrightEndYear for you. CopyrightYears string // CopyrightStartYear holds the starting year to place in the copyright banner. Will not be used if CopyrightYears // is already set. If not set explicitly, will be set to the year of the "vcs.time" build tag, if available. CopyrightStartYear string // CopyrightEndYear holds the ending year to place in the copyright banner. Will not be used if CopyrightYears is // already set. If not set explicitly, will be set to the year of the "vcs.time" build tag, if available. CopyrightEndYear string // CopyrightHolder holds the name of the copyright holder. CopyrightHolder string // License holds the license the software is being distributed under. This is intended to be a simple one line // description, such as "Mozilla Public License 2.0" and not the full license itself. License string // AppVersion holds the application's version information. If not set explicitly, will be the version of the main // module. Unfortunately, this automatic setting only works for binaries created using // "go install <package>@<version>". AppVersion string // GitVersion holds the vcs revision and clean/dirty status. If not set explicitly, will be generated from the value // of the build tags "vcs.revision" and "vcs.modified". GitVersion string // VCSModified is true if the "vcs.modified" build tag is true. VCSModified bool // BuildNumber holds the build number. If not set explicitly, will be generated from the value of the build tag // "vcs.time". BuildNumber string // AppIdentifier holds the uniform type identifier (UTI) for the application. This should contain only alphanumeric // (A-Z,a-z,0-9), hyphen (-), and period (.) characters. The string should also be in reverse-DNS format. For // example, if your company’s domain is ajax.com and you create an application named Hello, you could assign the // string com.ajax.Hello as your AppIdentifier. AppIdentifier string )
Functions ¶
func LongVersion ¶ added in v1.22.0
func LongVersion() string
LongVersion returns a combination of the app version and the build number.
func ResolveCopyrightYears ¶ added in v1.65.0
func ResolveCopyrightYears() string
ResolveCopyrightYears resolves the copyright years. If the CopyrightYears has been explicitly set, that will be returned unmodified. Otherwise, it will be generated based on the values of CopyrightStartYear and CopyrightEndYear.
func ShortVersion ¶ added in v1.22.0
func ShortVersion() string
ShortVersion returns the app version.
Types ¶
type Cmd ¶
type Cmd interface { // Name should return the name of the command as it needs to be entered on the command line. Name() string // Usage should return a description of what the command does. Usage() string // Run will be called to run the command. It will be passed a fresh command line created from the command line that // was parsed to determine this command would be run, along with the arguments that have not yet been consumed. The // first argument, much like an application called from main, will be the name of the command. Run(cmdLine *CmdLine, args []string) error }
Cmd represents a sub-command available on the command-line.
type CmdLine ¶
type CmdLine struct { // UsageSuffix, if set, will be appended to the 'Usage: ' line of the output. UsageSuffix string // Description, if set, will be inserted after the program identity section, before the usage. Description string // UsageTrailer, if set, will be appended to the end of the usage output. UsageTrailer string // contains filtered or unexported fields }
CmdLine holds information about the command line.
func New ¶
New creates a new CmdLine. If 'includeDefaultOptions' is true, help (-h, --help) and version (-v, --version, along with hidden -V, --Version for long variants) options will be added, otherwise, only the help options will be added, although they will be hidden.
func (*CmdLine) AddCommand ¶
AddCommand adds a command to the available commands.
func (*CmdLine) DisplayUsage ¶
func (cl *CmdLine) DisplayUsage()
DisplayUsage displays the program usage information.
func (*CmdLine) FatalError ¶
FatalError emits an error message and causes the program to exit.
func (*CmdLine) FatalIfError ¶
FatalIfError emits an error message and causes the program to exit if err != nil.
func (*CmdLine) NewGeneralOption ¶ added in v1.66.0
NewGeneralOption creates a new Option and attaches it to this CmdLine. Valid value types are: *bool, *int, *int8, *int16, *int32, *int64, *uint, *uint8, *uint16, *uint32, *uint64, *float32, *float64, *string, *time.Duration, *[]bool, *[]uint8, *[]uint16, *[]uint32, *[]uint64, *[]int8, *[]int16, *[]int32, *[]int64, *[]string, *[]time.Duration
func (*CmdLine) Parse ¶
Parse the 'args', filling in any options. Returns the remaining arguments that weren't used for option content.
func (*CmdLine) RunCommand ¶
RunCommand attempts to run a command. Pass in the command line arguments, usually the result from calling Parse().
type GeneralValue ¶ added in v1.66.0
type GeneralValue struct {
Value any
}
GeneralValue holds a general option value. Valid value types are: *bool, *int, *int8, *int16, *int32, *int64, *uint, *uint8, *uint16, *uint32, *uint64, *float32, *float64, *string, *time.Duration, *[]bool, *[]uint8, *[]uint16, *[]uint32, *[]uint64, *[]int8, *[]int16, *[]int32, *[]int64, *[]string, *[]time.Duration
func (*GeneralValue) Set ¶ added in v1.66.0
func (v *GeneralValue) Set(str string) error
Set implements Value
func (*GeneralValue) String ¶ added in v1.66.0
func (v *GeneralValue) String() string
type Option ¶
type Option struct {
// contains filtered or unexported fields
}
Option represents an option available on the command line.
func (*Option) SetArg ¶
SetArg sets the argument name for this option. Returns self for easy chaining.
func (*Option) SetDefault ¶
SetDefault sets the default value for this option. Returns self for easy chaining.