@@ -0,0 +1,93 @@
+package atom
+
+import (
+	"encoding/xml"
+	"time"
+
+	"git.icyphox.sh/vite/config"
+	"git.icyphox.sh/vite/markdown"
+)
+
+type AtomLink struct {
+	XMLName xml.Name `xml:"link"`
+	Href    string   `xml:"href,attr"`
+	Rel     string   `xml:"rel,attr,omitempty"`
+}
+
+type AtomSummary struct {
+	XMLName xml.Name `xml:"summary"`
+	Content string   `xml:",chardata"`
+	Type    string   `xml:"type,attr"`
+}
+
+type AtomAuthor struct {
+	XMLName xml.Name `xml:"author"`
+	Name    string   `xml:"name"`
+	Email   string   `xml:"email"`
+}
+
+type AtomEntry struct {
+	XMLName xml.Name `xml:"entry"`
+	Title   string   `xml:"title"`
+	Updated string   `xml:"updated"`
+	ID      string   `xml:"id"`
+	Link    *AtomLink
+	Summary *AtomSummary
+}
+
+type AtomFeed struct {
+	XMLName  xml.Name `xml:"feed"`
+	Xmlns    string   `xml:"xmlns,attr"`
+	Title    string   `xml:"title"`
+	Subtitle string   `xml:"subtitle"`
+	ID       string   `xml:"id"`
+	Updated  string   `xml:"updated"`
+	Link     *AtomLink
+	Author   *AtomAuthor `xml:"author"`
+	Entries  []AtomEntry
+}
+
+func NewAtomFeed(srcDir string, posts []markdown.Output) ([]byte, error) {
+	entries := []AtomEntry{}
+	config := config.Config
+	for _, p := range posts {
+		dateStr := p.Meta["date"]
+		date, err := time.Parse("2006-01-02", dateStr)
+		if err != nil {
+			return nil, err
+		}
+		rfc3339 := date.Format(time.RFC3339)
+
+		entry := AtomEntry{
+			Title:   p.Meta["title"],
+			Updated: rfc3339,
+			ID:      NewUUID().String(),
+			Link:    &AtomLink{Href: config.URL + srcDir + p.Meta["slug"]},
+			Summary: &AtomSummary{Content: string(p.HTML), Type: "html"},
+		}
+		entries = append(entries, entry)
+	}
+
+	// 2021-07-14T00:00:00Z
+	now := time.Now().Format(time.RFC3339)
+	feed := &AtomFeed{
+		Xmlns:    "http://www.w3.org/2005/Atom",
+		Title:    config.Title,
+		ID:       config.URL,
+		Subtitle: config.Desc,
+		Link:     &AtomLink{Href: config.URL},
+		Author: &AtomAuthor{
+			Name:  config.Author.Name,
+			Email: config.Author.Email,
+		},
+		Updated: now,
+		Entries: entries,
+	}
+
+	feedXML, err := xml.MarshalIndent(feed, " ", " ")
+	if err != nil {
+		return nil, err
+	}
+	// Add the <?xml...> header.
+	return []byte(xml.Header + string(feedXML)), nil
+}

@@ -0,0 +1,25 @@
+package atom
+
+import (
+	"crypto/rand"
+	"fmt"
+)
+
+type UUID [16]byte
+
+// Create a new uuid v4
+func NewUUID() *UUID {
+	u := &UUID{}
+	_, err := rand.Read(u[:16])
+	if err != nil {
+		panic(err)
+	}
+
+	u[8] = (u[8] | 0x80) & 0xBf
+	u[6] = (u[6] | 0x40) & 0x4f
+	return u
+}
+
+func (u *UUID) String() string {
+	return fmt.Sprintf("%x-%x-%x-%x-%x", u[:4], u[4:6], u[6:8], u[8:10], u[10:])
+}

@@ -7,6 +7,7 @@ "sort"
 	"strings"
 	"time"
 
+	"git.icyphox.sh/vite/atom"
 	"git.icyphox.sh/vite/config"
 	"git.icyphox.sh/vite/markdown"
 	"git.icyphox.sh/vite/util"
@@ -137,8 +138,10 @@ }
 
 			// Sort posts slice by date
 			sort.Slice(posts, func(i, j int) bool {
-				date1 := posts[j].Meta["date"].(time.Time)
-				date2 := posts[i].Meta["date"].(time.Time)
+				dateStr1 := posts[j].Meta["date"]
+				dateStr2 := posts[i].Meta["date"]
+				date1, _ := time.Parse("2006-01-02", dateStr1)
+				date2, _ := time.Parse("2006-01-02", dateStr2)
 				return date1.Before(date2)
 			})
 		}
@@ -160,6 +163,15 @@ Meta  markdown.Matter
 			Body  string
 			Posts []markdown.Output
 		}{config.Config, out.Meta, string(out.HTML), posts})
+
+		// Create feeds
+		// ex: build/blog/feed.xml
+		xml, err := atom.NewAtomFeed(d, posts)
+		if err != nil {
+			return err
+		}
+		feedFile := filepath.Join(dstDir, "feed.xml")
+		os.WriteFile(feedFile, xml, 0755)
 	}
 	return nil
 }

@@ -14,7 +14,7 @@ url := strings.TrimSuffix(file, filepath.Ext(file))
 
 	content := fmt.Sprintf(`---
 template:
-url: %s
+slug: %s
 title:
 subtitle:
 date: %s
@@ -24,6 +24,6 @@ _, err := os.Create(path)
 	if err != nil {
 		return err
 	}
-	os.WriteFile(path, []byte(content), 0644)
+	os.WriteFile(path, []byte(content), 0755)
 	return nil
 }

@@ -9,7 +9,7 @@
 	"gopkg.in/yaml.v3"
 )
 
-type Matter map[string]interface{}
+type Matter map[string]string
 
 type MarkdownDoc struct {
 	Frontmatter Matter

@@ -4,6 +4,7 @@ import (
 	"os"
 	"path/filepath"
 	"text/template"
+	"time"
 
 	bfc "github.com/Depado/bfchroma"
 	bf "github.com/russross/blackfriday/v2"
@@ -46,11 +47,16 @@ // Renders out.HTML into dst html file, using the template specified
 // in the frontmatter. data is the template struct.
 func (out *Output) RenderHTML(dst, tmplDir string, data interface{}) error {
 	metaTemplate := out.Meta["template"]
-	if metaTemplate == nil {
+	if metaTemplate == "" {
 		metaTemplate = "text.html"
 	}
 
-	t, err := template.ParseGlob(filepath.Join(tmplDir, "*.html"))
+	t, err := template.New("").Funcs(template.FuncMap{
+		"parsedate": func(s string) time.Time {
+			date, _ := time.Parse("2006-01-02", s)
+			return date
+		},
+	}).ParseGlob(filepath.Join(tmplDir, "*.html"))
 	if err != nil {
 		return err
 	}
@@ -60,7 +66,7 @@ if err != nil {
 		return err
 	}
 
-	if err = t.ExecuteTemplate(w, metaTemplate.(string), data); err != nil {
+	if err = t.ExecuteTemplate(w, metaTemplate, data); err != nil {
 		return err
 	}
 	return nil