main.go

package main

import (
	"fmt"
	"log"
	"otter-docs/internal/docs"
	"otter-docs/internal/git"
	"time"

	"github.com/gofiber/fiber/v2"
	"github.com/kelseyhightower/envconfig"
)

type Config struct {
	URL    string `envconfig:"GIT_URL" required:"true"`
	Branch string `envconfig:"GIT_BRANCH" default:"main"`

	Port string `envconfig:"PORT" default:"8080"`
}

func main() {
	var cfg Config

	if err := envconfig.Process("", &cfg); err != nil {
		panic(err)
	}

	git, err := git.New("./vuepress/docs/", cfg.URL, cfg.Branch)

	if err != nil {
		panic(err)
	}

	docs, err := docs.New()

	if err != nil {
		panic(err)
	}

	var updateError error

	go func() {
		for {
			updateError = update(git, docs)

			if updateError != nil {
				log.Printf("failed to update docs: %s", updateError)
			}

			time.Sleep(10 * time.Second)
		}
	}()

	app := fiber.New()

	app.Use(func(ctx *fiber.Ctx) error {
		if updateError != nil {
			return ctx.SendString(fmt.Sprintf("Failed to update docs: %s", updateError))
		}

		return ctx.Next()
	})

	app.Static("/", "./dist")

	app.Listen(":8080")
}

func update(git *git.Git, docs *docs.Docs) error {
	hasNewCommits, err := git.HasNewCommits()

	if err != nil {
		return err
	}

	if !hasNewCommits && !docs.LastBuilt.IsZero() {
		return nil
	}

	if hasNewCommits {
		if err := git.Pull(); err != nil {
			return err
		}
	}

	if err := docs.Install(); err != nil {
		return err
	}

	if err := docs.Build(); err != nil {
		return err
	}

	log.Print("successfully updated docs")

	return nil
}