62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package repl
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import (
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"io"
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"reflect"
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"slices"
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"ucl.lmika.dev/ucl"
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)
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type CommandOpt interface {
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config(cmdName string, r *REPL)
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}
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type REPL struct {
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inst *ucl.Inst
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commandDocs map[string]Doc
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typePrinters map[reflect.Type]func(w io.Writer, v any, brief bool) error
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}
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func New(opts ...ucl.InstOption) *REPL {
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r := &REPL{
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commandDocs: make(map[string]Doc),
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typePrinters: make(map[reflect.Type]func(w io.Writer, v any, brief bool) error),
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}
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instOpts := append(slices.Clone(opts), ucl.WithCustomEchoPrinter(r.echoPrinter))
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r.inst = ucl.New(instOpts...)
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r.SetCommand("help", r.helpBuiltin, Doc{
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Brief: "displays help about a command",
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Usage: "[command]",
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Args: []ArgDoc{
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{Name: "command", Brief: "command to display detailed help for"},
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},
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Detailed: `
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When used without arguments, 'help' will display the list of known commands,
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along with a brief description on what each one does.
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When used with an argument, 'help' will display a more detailed explanation
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of what each command does.
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`,
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})
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AddTypePrinter(r, func(w io.Writer, t NoResults, concise bool) error { return nil })
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return r
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}
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func (r *REPL) Inst() *ucl.Inst {
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return r.inst
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}
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func (r *REPL) SetCommand(name string, fn ucl.BuiltinHandler, opts ...CommandOpt) {
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r.commandDocs[name] = Doc{}
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for _, opt := range opts {
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opt.config(name, r)
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}
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r.inst.SetBuiltin(name, fn)
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}
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