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89 lines
2.5 KiB
Markdown
89 lines
2.5 KiB
Markdown
docopt-go
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=========
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[](https://travis-ci.org/docopt/docopt.go)
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[](https://coveralls.io/r/docopt/docopt.go)
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[](https://godoc.org/github.com/docopt/docopt.go)
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An implementation of [docopt](http://docopt.org/) in the
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[Go](http://golang.org/) programming language.
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**docopt** helps you create *beautiful* command-line interfaces easily:
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```go
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package main
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import (
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"fmt"
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"github.com/docopt/docopt-go"
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)
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func main() {
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usage := `Naval Fate.
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Usage:
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naval_fate ship new <name>...
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naval_fate ship <name> move <x> <y> [--speed=<kn>]
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naval_fate ship shoot <x> <y>
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naval_fate mine (set|remove) <x> <y> [--moored|--drifting]
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naval_fate -h | --help
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naval_fate --version
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Options:
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-h --help Show this screen.
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--version Show version.
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--speed=<kn> Speed in knots [default: 10].
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--moored Moored (anchored) mine.
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--drifting Drifting mine.`
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arguments, _ := docopt.Parse(usage, nil, true, "Naval Fate 2.0", false)
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fmt.Println(arguments)
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}
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```
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**docopt** parses command-line arguments based on a help message. Don't
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write parser code: a good help message already has all the necessary
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information in it.
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## Installation
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⚠ Use the alias “docopt-go”. To use docopt in your Go code:
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```go
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import "github.com/docopt/docopt-go"
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```
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To install docopt according to your `$GOPATH`:
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```console
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$ go get github.com/docopt/docopt-go
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```
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## API
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```go
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func Parse(doc string, argv []string, help bool, version string,
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optionsFirst bool, exit ...bool) (map[string]interface{}, error)
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```
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Parse `argv` based on the command-line interface described in `doc`.
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Given a conventional command-line help message, docopt creates a parser and
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processes the arguments. See
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https://github.com/docopt/docopt#help-message-format for a description of the
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help message format. If `argv` is `nil`, `os.Args[1:]` is used.
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docopt returns a map of option names to the values parsed from `argv`, and an
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error or `nil`.
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More documentation for docopt is available at
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[GoDoc.org](https://godoc.org/github.com/docopt/docopt.go).
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## Testing
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All tests from the Python version are implemented and passing
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at [Travis CI](https://travis-ci.org/docopt/docopt.go). New
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language-agnostic tests have been added
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to [test_golang.docopt](test_golang.docopt).
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To run tests for docopt-go, use `go test`.
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