package staticsite
import (
"bytes"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/yuin/goldmark"
)
// RenderMarkdownFiles walks the directory and converts all .md files to .html.
// The original .md file is kept alongside the generated .html file.
func RenderMarkdownFiles(dir string) error {
md := goldmark.New()
return filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
ext := strings.ToLower(filepath.Ext(path))
if ext != ".md" && ext != ".markdown" {
return nil
}
src, err := os.ReadFile(path)
if err != nil {
return fmt.Errorf("read %s: %w", path, err)
}
var buf bytes.Buffer
if err := md.Convert(src, &buf); err != nil {
return fmt.Errorf("render %s: %w", path, err)
}
html := wrapHTML(extractTitle(src), buf.String())
htmlPath := strings.TrimSuffix(path, filepath.Ext(path)) + ".html"
if err := os.WriteFile(htmlPath, []byte(html), 0o644); err != nil {
return fmt.Errorf("write %s: %w", htmlPath, err)
}
return nil
})
}
// extractTitle finds the first # heading in markdown content.
func extractTitle(src []byte) string {
for _, line := range strings.Split(string(src), "\n") {
trimmed := strings.TrimSpace(line)
if strings.HasPrefix(trimmed, "# ") {
return strings.TrimPrefix(trimmed, "# ")
}
}
return "Page"
}
// wrapHTML wraps rendered markdown in a minimal HTML document.
func wrapHTML(title, body string) string {
return fmt.Sprintf(`
%s
%s
`, title, body)
}