mirror of
https://github.com/strongdm/comply
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115 lines
2.7 KiB
Markdown
115 lines
2.7 KiB
Markdown
`goptions` implements a flexible parser for command line options.
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Key targets were the support for both long and short flag versions, mutually
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exclusive flags, and verbs. Flags and their corresponding variables are defined
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by the tags in a (possibly anonymous) struct.
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# Example
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```go
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package main
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import (
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"github.com/voxelbrain/goptions"
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"os"
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"time"
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)
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func main() {
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options := struct {
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Servers []string `goptions:"-s, --server, obligatory, description='Servers to connect to'"`
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Password string `goptions:"-p, --password, description='Don\\'t prompt for password'"`
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Timeout time.Duration `goptions:"-t, --timeout, description='Connection timeout in seconds'"`
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Help goptions.Help `goptions:"-h, --help, description='Show this help'"`
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goptions.Verbs
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Execute struct {
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Command string `goptions:"--command, mutexgroup='input', description='Command to exectute', obligatory"`
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Script *os.File `goptions:"--script, mutexgroup='input', description='Script to exectute', rdonly"`
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} `goptions:"execute"`
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Delete struct {
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Path string `goptions:"-n, --name, obligatory, description='Name of the entity to be deleted'"`
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Force bool `goptions:"-f, --force, description='Force removal'"`
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} `goptions:"delete"`
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}{ // Default values goes here
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Timeout: 10 * time.Second,
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}
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goptions.ParseAndFail(&options)
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}
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```
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```
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$ go run examples/readme_example.go --help
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Usage: a.out [global options] <verb> [verb options]
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Global options:
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-s, --server Servers to connect to (*)
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-p, --password Don't prompt for password
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-t, --timeout Connection timeout in seconds (default: 10s)
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-h, --help Show this help
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Verbs:
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delete:
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-n, --name Name of the entity to be deleted (*)
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-f, --force Force removal
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execute:
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--command Command to exectute (*)
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--script Script to exectute
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```
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# Quick Reference
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## goptions
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Each field of your struct can be tagged with a `goptions`
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```go
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FieldName type `goptions:"-S, --long, options..."`
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```
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Where the short options (`-S`) are declared with a single dash and
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long options (`--long`) are declared with two dashes. Either or
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both may be declared.
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After the short/long option names are one or more of the following:
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### Global Options
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* description='...'
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* obligatory
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* mutexgroup='GROUP_NAME'
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### os.File specific
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* create
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* append
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* rdonly
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* wronly
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* rdwr
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* excl
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* sync
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* trunc
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* perm=0777
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## Supported Types
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* bool
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* string
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* float64
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* float32
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* int
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* int64
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* int32
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* goptions.Help
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* *os.File
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* *net.TCPAddr
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* *url.URL
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* time.Duration
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---
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Version 2.5.11
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