build: bake git hash into build for headers and --version

4 files changed, 23 insertions, 0 deletions

diff --git a/internal/config/config.go b/internal/config/config.go
index 75f18d6..add4e67 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -12,6 +12,11 @@ import (
 	"github.com/pkg/errors"
 )
 
+var (
+	CommitSHA string
+	ShortSHA  string
+)
+
 type URL struct {
 	*url.URL
 }
diff --git a/internal/importer/http.go b/internal/importer/http.go
index 6d60c44..b496177 100644
--- a/internal/importer/http.go
+++ b/internal/importer/http.go
@@ -6,6 +6,7 @@ import (
 	"log/slog"
 	"net/http"
 	"os"
+	"searchix/internal/config"
 	"searchix/internal/file"
 	"strings"
 	"time"
@@ -29,6 +30,8 @@ func fetchFileIfNeeded(ctx context.Context, path string, url string) (needed boo
 		return false, errors.WithMessagef(err, "could not create HTTP request for %s", url)
 	}
 
+	req.Header.Set("User-Agent", fmt.Sprintf("Searchix %s", config.ShortSHA))
+
 	if mtime != "" {
 		req.Header.Set("If-Modified-Since", mtime)
 	}
diff --git a/internal/server/headers.go b/internal/server/headers.go
index 4fb9efd..562fccc 100644
--- a/internal/server/headers.go
+++ b/internal/server/headers.go
@@ -11,6 +11,7 @@ func AddHeadersMiddleware(next http.Handler, config *cfg.Config) http.Handler {
 			w.Header().Add(h, v)
 		}
 		w.Header().Add("Content-Security-Policy", config.Web.ContentSecurityPolicy.String())
+		w.Header().Add("Server", "searchix/"+cfg.ShortSHA)
 
 		next.ServeHTTP(w, r)
 	})
diff --git a/internal/server/mux.go b/internal/server/mux.go
index 582d154..0f32507 100644
--- a/internal/server/mux.go
+++ b/internal/server/mux.go
@@ -35,6 +35,11 @@ type HTTPError struct {
 
 const jsSnippet = template.HTML(livereload.JsSnippet) // #nosec G203
 
+type VersionInfo struct {
+	ShortSHA  string
+	CommitSHA string
+}
+
 type TemplateData struct {
 	Sources       map[string]*config.Source
 	Source        config.Source
@@ -42,6 +47,7 @@ type TemplateData struct {
 	Results       bool
 	SourceResult  *bleve.SearchResult
 	ExtraBodyHTML template.HTML
+	Version       VersionInfo
 }
 
 type ResultData[T options.NixOption] struct {
@@ -53,6 +59,11 @@ type ResultData[T options.NixOption] struct {
 	Next           string
 }
 
+var versionInfo = &VersionInfo{
+	ShortSHA:  config.ShortSHA,
+	CommitSHA: config.CommitSHA,
+}
+
 func applyDevModeOverrides(config *config.Config) {
 	if len(config.Web.ContentSecurityPolicy.ScriptSrc) == 0 {
 		config.Web.ContentSecurityPolicy.ScriptSrc = config.Web.ContentSecurityPolicy.DefaultSrc
@@ -93,6 +104,7 @@ func NewMux(
 		indexData := TemplateData{
 			ExtraBodyHTML: config.Web.ExtraBodyHTML,
 			Sources:       config.Importer.Sources,
+			Version:       *versionInfo,
 		}
 		err := templates["index"].ExecuteTemplate(w, "index.gotmpl", indexData)
 		if err != nil {
@@ -140,6 +152,7 @@ func NewMux(
 					ExtraBodyHTML: config.Web.ExtraBodyHTML,
 					Source:        *source,
 					Sources:       config.Importer.Sources,
+					Version:       *versionInfo,
 				},
 				ResultsPerPage: search.ResultsPerPage,
 				Query:          qs,
@@ -200,6 +213,7 @@ func NewMux(
 				Sources:       config.Importer.Sources,
 				Source:        *source,
 				SourceResult:  sourceResult,
+				Version:       *versionInfo,
 			})
 			if err != nil {
 				http.Error(w, err.Error(), http.StatusInternalServerError)