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package main
import (
"fmt"
"html/template"
"io/fs"
"log"
"os"
"path/filepath"
"strings"
"github.com/adrg/frontmatter"
"github.com/gomarkdown/markdown"
)
type Page struct {
Title string
Content template.HTML
}
type Frontmatter struct {
Title string `yaml:"title"`
}
func main() {
contentDir := "./content"
outputDir := "./output"
err := filepath.WalkDir(contentDir, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
if d.IsDir() {
return nil
}
if strings.HasSuffix(d.Name(), ".md") {
fmt.Println("Processing:", path)
title, htmlContent := convertToHtml(path)
newPage := Page{
Title: title, // you can customize this later
Content: template.HTML(htmlContent),
}
// Parse template once per file (could be optimized)
tmpl, err := template.ParseFiles("./layout.html")
if err != nil {
log.Fatalf("Error parsing template: %s", err)
}
// Compute relative path and output file path
relPath, err := filepath.Rel(contentDir, path)
if err != nil {
log.Fatalf("Error computing relative path: %s", err)
}
outputFilePath := filepath.Join(outputDir, strings.Replace(relPath, ".md", ".html", 1))
// Make sure the output directory exists
err = os.MkdirAll(filepath.Dir(outputFilePath), 0o755)
if err != nil {
log.Fatalf("Error creating directories: %s", err)
}
// Create the output file
outputFile, err := os.Create(outputFilePath)
if err != nil {
log.Fatalf("Error creating output file: %s", err)
}
defer outputFile.Close()
// Execute template
err = tmpl.Execute(outputFile, newPage)
if err != nil {
log.Fatalf("Error generating output content: %s", err)
}
}
return nil
})
if err != nil {
log.Fatalf("Error walking directory: %s", err)
}
fmt.Println("All files processed!")
}
func convertToHtml(path string) (string, []byte) {
md, err := os.ReadFile(path)
var matter Frontmatter
rest, err := frontmatter.Parse(strings.NewReader(string(md)), &matter)
if err != nil {
log.Fatalf("Error reading %s: %s", path, err)
}
fmt.Printf("Found post %s\n", matter.Title)
html := markdown.ToHTML(rest, nil, nil)
return matter.Title, html
}
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