rpcfetch: placeholder: add %hostname placeholder

The variable should be assigned a value in the init function of platform-specific apply implementations.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

fetch/apply.go

@@ -16,6 +16,7 @@ import (
 
 var (
 	pidS       = strconv.Itoa(os.Getpid())
+	hostname   string
 	launchTime = time.Now().Unix()
 )
 
@@ -23,6 +24,9 @@ var substitute = map[string]func(s *applyState) string{
 	"pid": func(_ *applyState) string {
 		return pidS
 	},
+	"hostname": func(_ *applyState) string {
+		return hostname
+	},
 	"1min": func(s *applyState) string {
 		s.populateLoadavg()
 		return s.loadavg[0]

fetch/apply_linux.go

@@ -9,6 +9,14 @@ import (
 	"strings"
 )
 
+func init() {
+	if h, err := os.Hostname(); err != nil {
+		log.Fatalf("error reading hostname: %s", err)
+	} else {
+		hostname = h
+	}
+}
+
 func (s *applyState) populateLoadavg() {
 	if s.loadavg != nil {
 		return

fetch/config.go

@@ -18,7 +18,7 @@ var defaultConfig = config{
 		Timestamps: &rpcfetch.ActivityTimestamps{Start: &launchTime},
 		Assets: &rpcfetch.ActivityAssets{
 			LargeImage: "yorha",
-			LargeText:  "1252927154480611351",
+			LargeText:  "%hostname",
 			SmallImage: "flan",
 			SmallText:  "PID: %pid",
 		},