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package builder
import (
"fmt"
"io"
"net/url"
"os"
"path"
"slices"
"sync"
"time"
"website/internal/config"
"website/internal/log"
cp "github.com/otiai10/copy"
"github.com/pkg/errors"
"github.com/snabb/sitemap"
)
type IOConfig struct {
Source string `conf:"default:.,short:s,flag:src"`
Destination string `conf:"default:website,short:d,flag:dest"`
BaseURL config.URL
Development bool `conf:"default:false,flag:dev"`
}
func mkdirp(dirs ...string) error {
err := os.MkdirAll(path.Join(dirs...), 0755)
return errors.Wrap(err, "could not create directory")
}
func outputToFile(output io.Reader, filename ...string) error {
log.Debug("outputting file", "filename", path.Join(filename...))
file, err := os.OpenFile(path.Join(filename...), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
return errors.WithMessage(err, "could not open output file")
}
defer file.Close()
if _, err := file.ReadFrom(output); err != nil {
return errors.WithMessage(err, "could not write output file")
}
return nil
}
func writerToFile(writer io.WriterTo, filename ...string) error {
log.Debug("outputting file", "filename", path.Join(filename...))
file, err := os.OpenFile(path.Join(filename...), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
return errors.WithMessage(err, "could not open output file")
}
defer file.Close()
if _, err := writer.WriteTo(file); err != nil {
return errors.WithMessage(err, "could not write output file")
}
return nil
}
func build(outDir string, config config.Config) error {
log.Debug("output", "dir", outDir)
assetsOnce = sync.Once{}
privateDir := path.Join(outDir, "private")
if err := mkdirp(privateDir); err != nil {
return errors.WithMessage(err, "could not create private directory")
}
publicDir := path.Join(outDir, "public")
if err := mkdirp(publicDir); err != nil {
return errors.WithMessage(err, "could not create public directory")
}
err := cp.Copy("static", publicDir, cp.Options{
PreserveTimes: true,
PermissionControl: cp.AddPermission(0755),
})
if err != nil {
return errors.WithMessage(err, "could not copy static files")
}
if err := mkdirp(publicDir, "post"); err != nil {
return errors.WithMessage(err, "could not create post output directory")
}
log.Debug("reading posts")
posts, tags, err := readPosts("content", "post", publicDir)
if err != nil {
return err
}
sm := NewSitemap(config)
lastMod := time.Now()
if len(posts) > 0 {
lastMod = posts[0].Date
}
for _, post := range posts {
if err := mkdirp(publicDir, "post", post.Basename); err != nil {
return errors.WithMessage(err, "could not create directory for post")
}
log.Debug("rendering post", "post", post.Basename)
sm.Add(&sitemap.URL{
Loc: post.URL,
LastMod: &post.Date,
})
output, err := renderPost(post, config)
if err != nil {
return errors.WithMessagef(err, "could not render post %s", post.Input)
}
if err := outputToFile(output, post.Output); err != nil {
return err
}
}
if err := mkdirp(publicDir, "tags"); err != nil {
return errors.WithMessage(err, "could not create directory for tags")
}
log.Debug("rendering tags list")
output, err := renderTags(tags, config, "/tags")
if err != nil {
return errors.WithMessage(err, "could not render tags")
}
if err := outputToFile(output, publicDir, "tags", "index.html"); err != nil {
return err
}
sm.Add(&sitemap.URL{
Loc: "/tags/",
LastMod: &lastMod,
})
for _, tag := range tags.ToSlice() {
matchingPosts := []Post{}
for _, post := range posts {
if slices.Contains(post.Taxonomies.Tags, tag) {
matchingPosts = append(matchingPosts, post)
}
}
if err := mkdirp(publicDir, "tags", tag); err != nil {
return errors.WithMessage(err, "could not create directory")
}
log.Debug("rendering tags page", "tag", tag)
url := "/tags/" + tag
output, err := renderListPage(tag, config, matchingPosts, url)
if err != nil {
return errors.WithMessage(err, "could not render tag page")
}
if err := outputToFile(output, publicDir, "tags", tag, "index.html"); err != nil {
return err
}
sm.Add(&sitemap.URL{
Loc: url,
LastMod: &matchingPosts[0].Date,
})
log.Debug("rendering tags feed", "tag", tag)
output, err = renderFeed(
fmt.Sprintf("%s - %s", config.Title, tag),
config,
matchingPosts,
tag,
)
if err != nil {
return errors.WithMessage(err, "could not render tag feed page")
}
if err := outputToFile(output, publicDir, "tags", tag, "atom.xml"); err != nil {
return err
}
}
log.Debug("rendering list page")
listPage, err := renderListPage("", config, posts, "/post")
if err != nil {
return errors.WithMessage(err, "could not render list page")
}
if err := outputToFile(listPage, publicDir, "post", "index.html"); err != nil {
return err
}
sm.Add(&sitemap.URL{
Loc: "/post/",
LastMod: &lastMod,
})
log.Debug("rendering feed")
feed, err := renderFeed(config.Title, config, posts, "feed")
if err != nil {
return errors.WithMessage(err, "could not render feed")
}
if err := outputToFile(feed, publicDir, "atom.xml"); err != nil {
return err
}
log.Debug("rendering feed styles")
feedStyles, err := renderFeedStyles()
if err != nil {
return errors.WithMessage(err, "could not render feed styles")
}
if err := outputToFile(feedStyles, publicDir, "feed-styles.xsl"); err != nil {
return err
}
log.Debug("rendering homepage")
homePage, err := renderHomepage(config, posts, "/")
if err != nil {
return errors.WithMessage(err, "could not render homepage")
}
if err := outputToFile(homePage, publicDir, "index.html"); err != nil {
return err
}
// it would be nice to set LastMod here, but using the latest post
// date would be wrong as the homepage has its own content file
// without a date, which could be newer
sm.Add(&sitemap.URL{
Loc: "/",
})
log.Debug("rendering 404 page")
notFound, err := render404(config, "/404.html")
if err != nil {
return errors.WithMessage(err, "could not render 404 page")
}
if err := outputToFile(notFound, publicDir, "404.html"); err != nil {
return err
}
log.Debug("rendering sitemap")
if err := writerToFile(sm, publicDir, "sitemap.xml"); err != nil {
return err
}
log.Debug("rendering robots.txt")
rob, err := renderRobotsTXT(config)
if err != nil {
return err
}
if err := outputToFile(rob, publicDir, "robots.txt"); err != nil {
return err
}
return nil
}
func BuildSite(ioConfig IOConfig) error {
config, err := config.GetConfig()
if err != nil {
return errors.WithMessage(err, "could not get config")
}
config.InjectLiveReload = ioConfig.Development
if ioConfig.BaseURL.URL != nil {
config.BaseURL.URL, err = url.Parse(ioConfig.BaseURL.String())
if err != nil {
return errors.WithMessage(err, "could not re-parse base URL")
}
}
if ioConfig.Development && ioConfig.Destination != "website" {
err = os.RemoveAll(ioConfig.Destination)
if err != nil {
return errors.WithMessage(err, "could not remove destination directory")
}
}
return build(ioConfig.Destination, *config)
}
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