Maint: do not mock os functions

- Use filepaths with /tmp for tests instead
- Only mock functions where filepath can't be specified such as user.Lookup

internal/cli/cli.go

@@ -5,19 +5,22 @@ import (
 	"context"
 
 	"github.com/qdm12/golibs/logging"
-	"github.com/qdm12/golibs/os"
 	"github.com/qdm12/golibs/params"
 )
 
 type CLI interface {
-	ClientKey(args []string, openFile os.OpenFileFunc) error
-	HealthCheck(ctx context.Context, env params.Env, os os.OS, logger logging.Logger) error
-	OpenvpnConfig(os os.OS, logger logging.Logger) error
-	Update(ctx context.Context, args []string, os os.OS, logger logging.Logger) error
+	ClientKey(args []string) error
+	HealthCheck(ctx context.Context, env params.Env, logger logging.Logger) error
+	OpenvpnConfig(logger logging.Logger) error
+	Update(ctx context.Context, args []string, logger logging.Logger) error
 }
 
-type cli struct{}
+type cli struct {
+	repoServersPath string
+}
 
 func New() CLI {
-	return &cli{}
+	return &cli{
+		repoServersPath: "./internal/constants/servers.json",
+	}
 }