diff options
Diffstat (limited to 'usage.go')
| -rw-r--r-- | usage.go | 30 |
1 files changed, 5 insertions, 25 deletions
@@ -9,37 +9,17 @@ import ( "strings" ) -// Usage prints usage information to stdout and exits with status zero -func Usage(dest ...interface{}) { - if err := WriteUsage(os.Stdout, dest...); err != nil { - fmt.Println(err) - } - os.Exit(0) -} - // Fail prints usage information to stdout and exits with non-zero status -func Fail(msg string, dest ...interface{}) { +func (p *Parser) Fail(msg string) { fmt.Println(msg) - if err := WriteUsage(os.Stdout, dest...); err != nil { - fmt.Println(err) - } + p.WriteUsage(os.Stdout) os.Exit(1) } // WriteUsage writes usage information to the given writer -func WriteUsage(w io.Writer, dest ...interface{}) error { - spec, err := extractSpec(dest...) - if err != nil { - return err - } - writeUsage(w, filepath.Base(os.Args[0]), spec) - return nil -} - -// writeUsage writes usage information to the given writer -func writeUsage(w io.Writer, cmd string, specs []*spec) { +func (p *Parser) WriteUsage(w io.Writer) { var positionals, options []*spec - for _, spec := range specs { + for _, spec := range p.spec { if spec.positional { positionals = append(positionals, spec) } else { @@ -47,7 +27,7 @@ func writeUsage(w io.Writer, cmd string, specs []*spec) { } } - fmt.Fprint(w, "usage: %s ", cmd) + fmt.Fprintf(w, "usage: %s ", filepath.Base(os.Args[0])) // write the option component of the one-line usage message for _, spec := range options { |