no panic, if no params

Author: alexei-led

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/stretchr/testify v1.4.0
 	github.com/urfave/cli/v2 v2.0.0
 	golang.org/x/net v0.0.0-20200226121028-0de0cce0169b // indirect
+	golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e
 	google.golang.org/api v0.15.0 // indirect
 	google.golang.org/genproto v0.0.0-20191220175831-5c49e3ecc1c1
 )

main.go

@@ -16,6 +16,7 @@ import (
 
 	log "github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
+	"golang.org/x/sys/unix"
 )
 
 var (
@@ -119,6 +120,11 @@ func run(ctx context.Context, provider secrets.Provider, commandSlice []string)
 	var commandStr string
 	var argsSlice []string
 
+	if len(commandSlice) == 0 {
+		log.Warn("no command specified")
+		return nil
+	}
+
 	// split command and arguments
 	commandStr = commandSlice[0]
 	// if there is args
@@ -170,7 +176,7 @@ func run(ctx context.Context, provider secrets.Provider, commandSlice []string)
 						"pid":    cmd.Process.Pid,
 						"path":   cmd.Path,
 						"args":   cmd.Args,
-						"signal": sig,
+						"signal": unix.SignalName(sig.(syscall.Signal)),
 					}).WithError(e).Error("failed to send system signal to the process")
 				}
 			}

test.yaml

@@ -0,0 +1,43 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: secretmanagerdemo
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: secretmanagerdemo
+    spec:
+      serviceAccountName: secrets-init-demo-sa
+      initContainers:
+        - name: secrets-init
+          image: doitintl/secrets-init:v0.2.6
+          command:
+            - sh
+          args:
+            - -c
+            - "cp /usr/local/bin/secrets-init /secrets-init/bin/"
+          volumeMounts:
+            - mountPath: /secrets-init/bin
+              name: secrets-init-volume
+      containers:
+        - image: alpine:3
+          name: print-env
+          env:
+            - name: TEST_SECRET
+              value: gcp:secretmanager:projects/240804453656/secrets/test-secret
+          command:
+            - /secrets-init/bin/secrets-init
+          args:
+            - --provider
+            - google
+            - sh
+            - -c
+            - 'echo test-secret=$TEST_SECRET; tail -f /dev/null'
+          volumeMounts:
+            - mountPath: /secrets-init/bin
+              name: secrets-init-volume
+      volumes:
+        - name: secrets-init-volume
+          emptyDir: {}