Fail immediately when commands missing

1 files changed, 13 insertions, 0 deletions

diff --git a/internal/service/service.go b/internal/service/service.go
index 38cabf8..9fbacfb 100644
--- a/internal/service/service.go
+++ b/internal/service/service.go
@@ -10,9 +10,16 @@ import (
 	"sync"
 	"time"
 
+	"git.server.ky/slackcoder/mirror/internal"
 	"git.server.ky/slackcoder/mirror/internal/github"
 )
 
+// These commands are required by the service to operate.
+var requiredCommands = []string{
+	"git",
+	"rsync",
+}
+
 type Service struct {
 	cfg *Config
 
@@ -26,6 +33,12 @@ type Service struct {
 func NewService(cfg *Config) (*Service, error) {
 	cfg.Apply(DefaultConfig)
 
+	for _, cmd := range requiredCommands {
+		if err := internal.RequireCommand(cmd); err != nil {
+			return nil, err
+		}
+	}
+
 	srv := &Service{
 		cfg:     cfg,
 		mirrors: nil,