100 lines
1.6 KiB
Go
100 lines
1.6 KiB
Go
package cmd
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import (
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"fmt"
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"os"
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"path/filepath"
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"go.fifitido.net/cmd/opts"
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)
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type Command struct {
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name string
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shortDescription string
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longDescription string
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aliases []string
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arguments []*Argument
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opts opts.Set
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subcommands Set
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parent *Command
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run func(args []string)
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isRoot bool
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}
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func NewRoot(options ...Option) *Command {
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cmd := &Command{isRoot: true}
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cmd.ApplyOptions(options...)
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return cmd
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}
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func New(name string, options ...Option) *Command {
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cmd := &Command{name: name}
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cmd.ApplyOptions(options...)
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return cmd
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}
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func (c *Command) ApplyOptions(options ...Option) {
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for _, option := range options {
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option(c)
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}
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}
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func (c *Command) Root() *Command {
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if c.isRoot {
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return c
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}
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return c.parent.Root()
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}
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func (c *Command) CommandPath() string {
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if c.parent == nil {
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return filepath.Base(os.Args[0])
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}
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return c.parent.CommandPath() + " " + c.name
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}
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func (c *Command) CanRun() bool {
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return c.run != nil
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}
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func (c *Command) Run(args []string) {
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c.run(args)
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}
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func (c *Command) Execute(args []string) {
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if c.isRoot {
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args = args[1:]
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}
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parser := opts.NewParser(args, c.opts, false)
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restArgs, err := parser.Parse()
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if err != nil {
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fmt.Println(err.Error())
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c.ShowHelp()
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os.Exit(1)
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}
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if len(restArgs) > 0 {
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sc, ok := c.subcommands.Get(restArgs[0])
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if ok {
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sc.Execute(restArgs[1:])
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return
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}
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}
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helpOpt, ok := opts.Globals().GetBool("help")
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if ok && helpOpt.Value() {
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c.ShowHelp()
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return
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}
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if c.CanRun() {
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c.Run(restArgs)
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return
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}
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c.ShowHelp()
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}
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