spruce/main.go

package main

import (
	"embed"
	"log"
	"os"
)

type Runner interface {
	Parse([]string) error
	Name() string
	Run() error
}

//go:embed templates/tex/*
var templates embed.FS

func main() {
	commandMap := map[string]Runner{
		"version":  NewVersionCommand(),
		"generate": NewGenerateCommand(),
		"create":   NewCreateCommand(),
	}

	subcommand := os.Args[1]

	runner, ok := commandMap[subcommand]

	if !ok {
		log.Fatalf("ERROR: unknown subcommand '%s'.", subcommand)
	}

	if err := runner.Parse(os.Args[2:]); err != nil {
		log.Fatalf("ERROR: unable to parse the command line flags; %v.", err)
	}

	if err := runner.Run(); err != nil {
		log.Fatalf("ERROR: unable to run '%s'; %v.", runner.Name(), err)
	}
}