95 lines
2.7 KiB
Go
95 lines
2.7 KiB
Go
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package kingpin
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import (
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"os"
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"path/filepath"
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)
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var (
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// CommandLine is the default Kingpin parser.
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CommandLine = New(filepath.Base(os.Args[0]), "")
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// Global help flag. Exposed for user customisation.
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HelpFlag = CommandLine.HelpFlag
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// Top-level help command. Exposed for user customisation. May be nil.
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HelpCommand = CommandLine.HelpCommand
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// Global version flag. Exposed for user customisation. May be nil.
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VersionFlag = CommandLine.VersionFlag
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)
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// Command adds a new command to the default parser.
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func Command(name, help string) *CmdClause {
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return CommandLine.Command(name, help)
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}
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// Flag adds a new flag to the default parser.
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func Flag(name, help string) *FlagClause {
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return CommandLine.Flag(name, help)
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}
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// Arg adds a new argument to the top-level of the default parser.
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func Arg(name, help string) *ArgClause {
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return CommandLine.Arg(name, help)
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}
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// Parse and return the selected command. Will call the termination handler if
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// an error is encountered.
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func Parse() string {
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selected := MustParse(CommandLine.Parse(os.Args[1:]))
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if selected == "" && CommandLine.cmdGroup.have() {
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Usage()
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CommandLine.terminate(0)
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}
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return selected
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}
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// Errorf prints an error message to stderr.
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func Errorf(format string, args ...interface{}) {
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CommandLine.Errorf(format, args...)
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}
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// Fatalf prints an error message to stderr and exits.
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func Fatalf(format string, args ...interface{}) {
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CommandLine.Fatalf(format, args...)
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}
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// FatalIfError prints an error and exits if err is not nil. The error is printed
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// with the given prefix.
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func FatalIfError(err error, format string, args ...interface{}) {
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CommandLine.FatalIfError(err, format, args...)
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}
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// FatalUsage prints an error message followed by usage information, then
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// exits with a non-zero status.
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func FatalUsage(format string, args ...interface{}) {
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CommandLine.FatalUsage(format, args...)
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}
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// FatalUsageContext writes a printf formatted error message to stderr, then
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// usage information for the given ParseContext, before exiting.
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func FatalUsageContext(context *ParseContext, format string, args ...interface{}) {
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CommandLine.FatalUsageContext(context, format, args...)
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}
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// Usage prints usage to stderr.
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func Usage() {
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CommandLine.Usage(os.Args[1:])
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}
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// Set global usage template to use (defaults to DefaultUsageTemplate).
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func UsageTemplate(template string) *Application {
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return CommandLine.UsageTemplate(template)
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}
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// MustParse can be used with app.Parse(args) to exit with an error if parsing fails.
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func MustParse(command string, err error) string {
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if err != nil {
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Fatalf("%s, try --help", err)
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}
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return command
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}
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// Version adds a flag for displaying the application version number.
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func Version(version string) *Application {
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return CommandLine.Version(version)
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}
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