git-webhook-ci/cfg/config.go

package cfg

import (
	"log"
	"os/exec"
	"strings"

	"github.com/joho/godotenv"
	"github.com/kelseyhightower/envconfig"
)

type Config struct {
	ScriptBinaryPath    string `required:"true" split_words:"true"`
	WebhookScriptPath   string `required:"true" split_words:"true"`
	FileToWatchPath     string `required:"true" split_words:"true"`
	TestFileToWatchPath string `required:"false" split_words:"true"`
}

func RootDir() string {
	cmdOut, err := exec.Command("git", "rev-parse", "--show-toplevel").Output()
	if err != nil {
		log.Fatalf("exec.Command: %s", err)
		return ""
	}

	rootDir := strings.TrimSpace(string(cmdOut))
	return rootDir
}

func NewConfig(envFilePath string) *Config {
	if envFilePath != "" {
		err := godotenv.Load(envFilePath)
		if err != nil {
			log.Fatalf("environment variable ENV is empty and an error occurred while loading the .env file\n")
		}
	}

	cfg := &Config{}
	err := envconfig.Process("", cfg)
	if err != nil {
		log.Fatalf("envconfig.Process: %s\n", err)
	}

	return cfg
}