treerack/cmd/treerack/checksyntax.go

package main

import (
	"code.squareroundforest.org/arpio/treerack"
	"io"
)

type checkSyntaxOptions struct {

	// Syntax specifies the filename of the syntax definition file.
	Syntax *string

	// SyntaxString specifies the syntax as an inline string.
	SyntaxString *string
}

// checkSyntax validates a syntax definition. The syntax may be provided via a file path (using an option or a
// positional argument), an inline string, or piped from standard input.
func checkSyntax(o checkSyntaxOptions, stdin io.Reader, args ...string) error {
	syntax, finalize, err := initInput(o.Syntax, o.SyntaxString, stdin, args)
	if err != nil {
		return err
	}

	defer finalize()
	s := &treerack.Syntax{}
	if err := s.ReadSyntax(syntax); err != nil {
		return err
	}

	return s.Init()
}