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//go:generate templ generate
//go:generate go run .
package main
import (
"context"
"embed"
"flag"
"fmt"
"io"
iofs "io/fs"
"net/http"
"os"
"path/filepath"
"time"
"github.com/alecthomas/chroma/v2/styles"
"github.com/gorilla/feeds"
)
var (
//go:embed articles/*
articleFS embed.FS
//go:embed static/*
staticFS embed.FS
ref string = "main"
)
func init() {
if r, ok := os.LookupEnv("BLOG_REF"); ok {
ref = r
}
}
func maine() error {
fs := flag.NewFlagSet("blog", flag.ExitOnError)
outFlag := fs.String("out", "out", "Output directory")
fs.StringVar(outFlag, "o", *outFlag, "--out")
serveFlag := fs.Bool("serve", false, "Serve output dir after generation")
fs.BoolVar(serveFlag, "s", *serveFlag, "--serve")
if err := fs.Parse(os.Args[1:]); err != nil {
return err
}
files, err := articleFS.ReadDir("articles")
if err != nil {
return err
}
categories := make(Articles)
articles := make([]Article, 0, len(files))
for _, file := range files {
if filepath.Ext(file.Name()) != ".md" {
continue
}
path := fmt.Sprintf("articles/%s", file.Name())
content, err := iofs.ReadFile(articleFS, path)
if err != nil {
return err
}
article, err := Parse(string(content))
if err != nil {
return err
}
article.path = path
categories[article.Category] = append(categories[article.Category], article)
articles = append(articles, article)
if err := writeArticle(*outFlag, article); err != nil {
return err
}
}
if err := writeCSS(*outFlag); err != nil {
return err
}
if err := copyStatic(*outFlag); err != nil {
return err
}
if err := writeRSS(*outFlag, articles); err != nil {
return err
}
fi, err := os.Create(filepath.Join(*outFlag, "index.html"))
if err != nil {
return err
}
defer fi.Close()
if err := IndexTemplate(categories).Render(context.Background(), fi); err != nil {
return err
}
if *serveFlag {
fmt.Println("http://localhost:8080")
http.Handle("/", http.FileServer(http.Dir("out")))
http.ListenAndServe(":8080", nil)
}
return nil
}
func writeArticle(out string, article Article) error {
dest := filepath.Join(out, article.Slug(), "index.html")
if err := os.MkdirAll(filepath.Dir(dest), os.ModePerm); err != nil {
return err
}
fi, err := os.Create(dest)
if err != nil {
return err
}
defer fi.Close()
return ArticleTemplate(article).Render(context.Background(), fi)
}
func writeRSS(out string, articles []Article) error {
fi, err := os.Create(filepath.Join(out, "feed.atom"))
if err != nil {
return err
}
defer fi.Close()
feed := &feeds.Feed{
Title: "jolheiser",
Link: &feeds.Link{Href: "https://blog.jolheiser.com/"},
Description: "jolheiser's blog log in a blog bog",
Author: &feeds.Author{
Name: "John Olheiser",
Email: "john@jolheiser.com",
},
Updated: time.Now(),
Created: time.Date(2024, time.February, 25, 0, 0, 0, 0, time.Local),
// Image: &feeds.Image{},
}
for _, article := range articles {
if article.Draft {
continue
}
url := fmt.Sprintf("https://blog.jolheiser.com/%s", article.Slug())
feed.Items = append(feed.Items, &feeds.Item{
Title: article.Title,
Link: &feeds.Link{Href: url},
Description: article.Summary,
Id: url,
Created: article.Date,
// Content: article.Content,
})
}
return feed.WriteAtom(fi)
}
func writeCSS(out string) error {
fi, err := os.Create(filepath.Join(out, "chroma.css"))
if err != nil {
return err
}
defer fi.Close()
if err := CSS.WriteCSS(fi, styles.Get("catppuccin-latte")); err != nil {
return err
}
fi.WriteString("@media (prefers-color-scheme: dark) {")
if err := CSS.WriteCSS(fi, styles.Get("catppuccin-mocha")); err != nil {
return err
}
fi.WriteString("}")
return nil
}
func copyStatic(out string) error {
files, err := staticFS.ReadDir("static")
if err != nil {
return err
}
for _, file := range files {
if err := func() error {
dstFi, err := os.Create(filepath.Join(out, file.Name()))
if err != nil {
return err
}
defer dstFi.Close()
srcFi, err := staticFS.Open("static/" + file.Name())
if err != nil {
return err
}
defer srcFi.Close()
if _, err := io.Copy(dstFi, srcFi); err != nil {
return err
}
return nil
}(); err != nil {
return err
}
}
return nil
}
func copyFile(dst, src string) error {
srcFi, err := os.Open(src)
if err != nil {
return err
}
defer srcFi.Close()
dstFi, err := os.Create(dst)
if err != nil {
return err
}
defer dstFi.Close()
if _, err := io.Copy(dstFi, srcFi); err != nil {
return err
}
return nil
}
func main() {
if err := maine(); err != nil {
fmt.Println(err)
os.Exit(1)
}
}
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