feat(explorer): externalize branding to environ config

.gitignore

@@ -1,3 +1,6 @@
+configs/environ.overrides.json
+configs/environ.override.json
+
 vendor/
 data*/
 profile/
@@ -19,4 +22,4 @@ __debug*
 .gocache/
 __pycache__/
 .dev/
-.spec/
+.spec/

api/text.go

@@ -1,34 +1,15 @@
 package api
 
-import (
-	"embed"
-	"fmt"
-	"net/url"
-	"strings"
-)
+import "strings"
 
-//go:embed embed/*
-var embedded embed.FS
-
-// Text contains static overridable texts used in explorer
+// Text contains static overridable texts used in explorer and API.
 var Text struct {
 	BlockbookAbout, TOSLink string
 }
 
-func init() {
-	if about, err := embedded.ReadFile("embed/about"); err == nil {
-		Text.BlockbookAbout = strings.TrimSpace(string(about))
-	} else {
-		panic(err)
-	}
-	if tosLinkB, err := embedded.ReadFile("embed/tos_link"); err == nil {
-		tosLink := strings.TrimSpace(string(tosLinkB))
-		if _, err := url.ParseRequestURI(tosLink); err == nil {
-			Text.TOSLink = tosLink
-		} else {
-			panic(fmt.Sprint("tos_link is not valid URL:", err.Error()))
-		}
-	} else {
-		panic(err)
-	}
+// SetBranding sets BlockbookAbout and TOSLink from branding loaded at process startup.
+// Callers must pass values already validated by common.LoadBranding (about non-empty, tos_link a valid absolute URL).
+func SetBranding(about, tosLink string) {
+	Text.BlockbookAbout = strings.TrimSpace(about)
+	Text.TOSLink = strings.TrimSpace(tosLink)
 }

blockbook.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	_ "net/http/pprof"
 	"os"
+	"path/filepath"
 	"os/signal"
 	"runtime/debug"
 	"strconv"
@@ -108,6 +109,7 @@ var (
 	callbacksOnNewTx              []bchain.OnNewTxFunc
 	callbacksOnNewFiatRatesTicker []fiat.OnNewFiatRatesTicker
 	chanOsSignal                  chan os.Signal
+	appBranding                   *common.Branding
 )
 
 func init() {
@@ -176,6 +178,14 @@ func mainWithExitCode() int {
 		return exitCodeFatal
 	}
 
+	configsDir := filepath.Clean(filepath.Join(filepath.Dir(*configFile), ".."))
+	appBranding, err = common.LoadBranding(configsDir)
+	if err != nil {
+		glog.Error("branding: ", err)
+		return exitCodeFatal
+	}
+	api.SetBranding(appBranding.About, appBranding.TOSLink)
+
 	metrics, err = common.GetMetrics(config.CoinName)
 	if err != nil {
 		glog.Error("metrics: ", err)
@@ -442,7 +452,7 @@ func startInternalServer() (*server.InternalServer, error) {
 
 func startPublicServer() (*server.PublicServer, error) {
 	// start public server in limited functionality, extend it after sync is finished by calling ConnectFullPublicInterface
-	publicServer, err := server.NewPublicServer(*publicBinding, *certFiles, index, chain, mempool, txCache, *explorerURL, metrics, internalState, fiatRates, *debugMode)
+	publicServer, err := server.NewPublicServer(*publicBinding, *certFiles, index, chain, mempool, txCache, *explorerURL, metrics, internalState, fiatRates, *debugMode, appBranding)
 	if err != nil {
 		return nil, err
 	}