@@ -19,6 +19,8 @@ ExtraHeadHTML string
 	Code          int
 	Message       string
 	Title         string
+	Description   string
+	BaseURL       config.URL
 	Assets        *frontend.AssetCollection
 	SearchNav     SearchNav
 }

@@ -1,6 +1,9 @@
 package components
 
 import (
+	"fmt"
+	"strings"
+
 	"alin.ovh/searchix/internal/index"
 	"alin.ovh/searchix/internal/nix"
 
@@ -15,6 +18,52 @@ case nix.Package:
 		return PackageDetail(t)
 	default:
 		return nil
+	}
+}
+
+const MaxDescriptionLength = 160
+
+func TruncateWithEllipsis(text string, maxLength int) string {
+	if len(text) > maxLength {
+		if maxLength > 1 {
+			return text[:maxLength-1] + "…"
+		}
+
+		return text
+	}
+
+	return text
+}
+
+func MetaDescription(thing index.Indexable) string {
+	switch t := thing.(type) {
+	case nix.Package:
+		desc := t.Attribute
+		if t.Version != "" {
+			desc += " " + t.Version
+		}
+		if t.Description != "" {
+			desc += " - " + t.Description
+		}
+
+		desc = TruncateWithEllipsis(desc, MaxDescriptionLength)
+
+		return desc
+	case nix.Option:
+		desc := t.Name
+		if t.Type != "" {
+			desc = fmt.Sprintf("%s - %s option", desc, t.Type)
+		}
+		plain := strings.TrimSpace(string(t.Description))
+		if plain != "" {
+			desc += ". " + plain
+		}
+
+		desc = TruncateWithEllipsis(desc, MaxDescriptionLength)
+
+		return desc
+	default:
+		return ""
 	}
 }
 

@@ -2,6 +2,7 @@ package components
 
 import (
 	"net/url"
+	"strings"
 
 	"alin.ovh/searchix/frontend"
 	"alin.ovh/searchix/internal/config"
@@ -18,6 +19,23 @@ Lang("en-GB"),
 			Head(
 				Meta(Charset("utf-8")),
 				Meta(Name("viewport"), Content("width=device-width, initial-scale=1")),
+				g.If(tdata.Description != "",
+					g.Group([]g.Node{
+						Meta(Name("description"), Content(tdata.Description)),
+						Meta(g.Attr("property", "og:description"), Content(tdata.Description)),
+					}),
+				),
+				Meta(g.Attr("property", "og:type"), Content("website")),
+				Meta(g.Attr("property", "og:site_name"), Content("Searchix")),
+				Meta(g.Attr("property", "og:title"), Content(ogTitle(tdata.Title))),
+				g.If(tdata.BaseURL.URL != nil,
+					g.Group([]g.Node{
+						Meta(
+							g.Attr("property", "og:image"),
+							Content(tdata.BaseURL.JoinPath("apple-touch-icon.png").String()),
+						),
+					}),
+				),
 				TitleEl(
 					g.Raw(tdata.Title),
 					g.Text("Searchix"), g.If(config.DevMode, g.Text(" (Dev)")),
@@ -126,6 +144,13 @@ ),
 			),
 		),
 	)
+}
+
+func ogTitle(title string) string {
+	t := strings.ReplaceAll(title, " ‐ ", " - ")
+	t += "Searchix"
+
+	return t
 }
 
 func css(css *frontend.Asset) g.Node {

@@ -25,6 +25,7 @@ ExtraHeadHTML: config.Web.ExtraHeadHTML,
 			Sources:       sources,
 			Code:          code,
 			Message:       message,
+			BaseURL:       config.Web.BaseURL,
 			Assets:        assets,
 		}
 		w.Header().Set("Cache-Control", "no-store")

@@ -119,6 +119,11 @@ g.errorHandler(w, r, "Too many results, use pagination", http.StatusBadRequest)
 		}
 		page.SetResults(results.Total)
 
+		searchDesc := fmt.Sprintf("Search results for %s", qs)
+		if source.Importer != config.All {
+			searchDesc += " in " + source.Name
+		}
+
 		tdata := components.ResultData{
 			TemplateData: components.TemplateData{
 				ExtraHeadHTML: g.cfg.Web.ExtraHeadHTML,
@@ -127,6 +132,8 @@ Sources:       sources,
 				Assets:        g.assets,
 				Query:         qs,
 				Title:         g.getTitle(source, qs),
+				Description:   searchDesc,
+				BaseURL:       g.cfg.Web.BaseURL,
 				SearchNav:     components.NewSearchNav(*r.URL).WithPagination(page),
 			},
 			Query:        qs,
@@ -156,6 +163,8 @@ ExtraHeadHTML: g.cfg.Web.ExtraHeadHTML,
 				Sources:       sources,
 				Source:        source,
 				Title:         g.getTitle(source, ""),
+				Description:   "Search Nix packages and options",
+				BaseURL:       g.cfg.Web.BaseURL,
 				Assets:        g.assets,
 			},
 			components.ResultData{},

@@ -79,6 +79,8 @@ Source:        h.source,
 		Sources:       sources,
 		Assets:        h.global.assets,
 		Title:         h.getTitle(doc),
+		Description:   components.MetaDescription(doc),
+		BaseURL:       h.global.cfg.Web.BaseURL,
 	}
 	var baseErr error
 	if r.Header.Get("Fetch") == "true" {