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package builder
import (
"context"
"fmt"
"io"
"os"
"path"
"path/filepath"
"slices"
"time"
"go.alanpearce.eu/website/internal/config"
"go.alanpearce.eu/website/internal/content"
"go.alanpearce.eu/website/internal/sitemap"
"go.alanpearce.eu/website/templates"
"go.alanpearce.eu/x/log"
"github.com/a-h/templ"
mapset "github.com/deckarep/golang-set/v2"
"gitlab.com/tozd/go/errors"
)
type IOConfig struct {
Source string `conf:"default:.,short:s,flag:src"`
Destination string `conf:"default:public,short:d,flag:dest"`
Development bool `conf:"default:false,flag:dev"`
}
type Result struct {
Hashes []string
}
var compressFiles = false
func mkdirp(dirs ...string) error {
err := os.MkdirAll(path.Join(dirs...), 0755)
return errors.WithMessage(err, "could not create directory")
}
func outputToFile(output io.Reader, pathParts ...string) error {
filename := path.Join(pathParts...)
// log.Debug("outputting file", "filename", filename)
file, err := openFileAndVariants(filename)
if err != nil {
return errors.WithMessage(err, "could not open output file")
}
defer file.Close()
if _, err := io.Copy(file, output); err != nil {
return errors.WithMessage(err, "could not write output file")
}
return nil
}
func renderToFile(component templ.Component, pathParts ...string) error {
filename := path.Join(pathParts...)
// log.Debug("outputting file", "filename", filename)
file, err := openFileAndVariants(filename)
if err != nil {
return errors.WithMessage(err, "could not open output file")
}
defer file.Close()
if err := component.Render(context.TODO(), file); err != nil {
return errors.WithMessage(err, "could not write output file")
}
return nil
}
func writerToFile(writer io.WriterTo, pathParts ...string) error {
filename := path.Join(pathParts...)
// log.Debug("outputting file", "filename", path.Join(filename...))
file, err := openFileAndVariants(filename)
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 joinSourcePath(src string) func(string) string {
return func(rel string) string {
return filepath.Join(src, rel)
}
}
func build(ioConfig *IOConfig, config *config.Config, log *log.Logger) (*Result, error) {
outDir := ioConfig.Destination
joinSource := joinSourcePath(ioConfig.Source)
log.Debug("output", "dir", outDir)
r := &Result{
Hashes: make([]string, 0),
}
err := copyRecursive(joinSource("static"), outDir)
if err != nil {
return nil, errors.WithMessage(err, "could not copy static files")
}
if err := mkdirp(outDir, "post"); err != nil {
return nil, errors.WithMessage(err, "could not create post output directory")
}
log.Debug("reading posts")
posts, tags, err := content.ReadPosts(&content.Config{
Root: joinSource("content"),
InputDir: "post",
OutputDir: outDir,
}, log.Named("content"))
if err != nil {
return nil, err
}
sitemap := sitemap.New(config)
lastMod := time.Now()
if len(posts) > 0 {
lastMod = posts[0].Date
}
for _, post := range posts {
if err := mkdirp(outDir, "post", post.Basename); err != nil {
return nil, errors.WithMessage(err, "could not create directory for post")
}
log.Debug("rendering post", "post", post.Basename)
sitemap.AddPath(post.URL, post.Date)
if err := renderToFile(templates.PostPage(config, post), post.Output); err != nil {
return nil, err
}
}
if err := mkdirp(outDir, "tags"); err != nil {
return nil, errors.WithMessage(err, "could not create directory for tags")
}
log.Debug("rendering tags list")
if err := renderToFile(
templates.TagsPage(config, "tags", mapset.Sorted(tags), "/tags"),
outDir,
"tags",
"index.html",
); err != nil {
return nil, err
}
sitemap.AddPath("/tags/", lastMod)
for _, tag := range tags.ToSlice() {
matchingPosts := []content.Post{}
for _, post := range posts {
if slices.Contains(post.Taxonomies.Tags, tag) {
matchingPosts = append(matchingPosts, post)
}
}
if err := mkdirp(outDir, "tags", tag); err != nil {
return nil, errors.WithMessage(err, "could not create directory")
}
log.Debug("rendering tags page", "tag", tag)
url := "/tags/" + tag
if err := renderToFile(
templates.TagPage(config, tag, matchingPosts, url),
outDir,
"tags",
tag,
"index.html",
); err != nil {
return nil, err
}
sitemap.AddPath(url, matchingPosts[0].Date)
log.Debug("rendering tags feed", "tag", tag)
feed, err := renderFeed(
fmt.Sprintf("%s - %s", config.Title, tag),
config,
matchingPosts,
tag,
)
if err != nil {
return nil, errors.WithMessage(err, "could not render tag feed page")
}
if err := writerToFile(feed, outDir, "tags", tag, "atom.xml"); err != nil {
return nil, err
}
}
log.Debug("rendering list page")
if err := renderToFile(templates.ListPage(config, posts, "/post"), outDir, "post", "index.html"); err != nil {
return nil, err
}
sitemap.AddPath("/post/", lastMod)
log.Debug("rendering feed")
feed, err := renderFeed(config.Title, config, posts, "feed")
if err != nil {
return nil, errors.WithMessage(err, "could not render feed")
}
if err := writerToFile(feed, outDir, "atom.xml"); err != nil {
return nil, err
}
log.Debug("rendering feed styles")
feedStyles, err := renderFeedStyles(ioConfig.Source)
if err != nil {
return nil, errors.WithMessage(err, "could not render feed styles")
}
if err := outputToFile(feedStyles, outDir, "feed-styles.xsl"); err != nil {
return nil, err
}
_, err = feedStyles.Seek(0, 0)
if err != nil {
return nil, err
}
h, err := getFeedStylesHash(feedStyles)
if err != nil {
return nil, err
}
r.Hashes = append(r.Hashes, h)
log.Debug("rendering homepage")
_, text, err := content.GetPost(joinSource(filepath.Join("content", "index.md")))
if err != nil {
return nil, err
}
content, err := content.RenderMarkdown(text)
if err != nil {
return nil, err
}
if err := renderToFile(templates.Homepage(config, posts, content), outDir, "index.html"); err != nil {
return nil, 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
sitemap.AddPath("/", time.Time{})
h, _ = getHTMLStyleHash(outDir, "index.html")
r.Hashes = append(r.Hashes, h)
log.Debug("rendering sitemap")
if err := writerToFile(sitemap, outDir, "sitemap.xml"); err != nil {
return nil, err
}
log.Debug("rendering robots.txt")
rob, err := renderRobotsTXT(ioConfig.Source, config)
if err != nil {
return nil, err
}
if err := outputToFile(rob, outDir, "robots.txt"); err != nil {
return nil, err
}
return r, nil
}
func BuildSite(ioConfig *IOConfig, cfg *config.Config, log *log.Logger) (*Result, error) {
if cfg == nil {
return nil, errors.New("config is nil")
}
cfg.InjectLiveReload = ioConfig.Development
compressFiles = !ioConfig.Development
templates.Setup()
loadCSS(ioConfig.Source)
return build(ioConfig, cfg, log)
}
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