fix: convert path to absolute path when doing `helm secret dec` (#664)

Fixes #663

pkg/helmexec/exec.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"io/ioutil"
 	"os"
+	"path/filepath"
 	"strings"
 	"sync"
 
@@ -130,10 +131,14 @@ func (helm *execer) DecryptSecret(context HelmContext, name string, flags ...str
 	helm.decryptionMutex.Lock()
 	defer helm.decryptionMutex.Unlock()
 
-	helm.logger.Infof("Decrypting secret %v", name)
+	absPath, err := filepath.Abs(name)
+	if err != nil {
+		return "", err
+	}
+	helm.logger.Infof("Decrypting secret %v", absPath)
 	preArgs := context.GetTillerlessArgs(helm.helmBinary)
 	env := context.getTillerlessEnv()
-	out, err := helm.exec(append(append(preArgs, "secrets", "dec", name), flags...), env)
+	out, err := helm.exec(append(append(preArgs, "secrets", "dec", absPath), flags...), env)
 	helm.write(out)
 	if err != nil {
 		return "", err
@@ -150,7 +155,7 @@ func (helm *execer) DecryptSecret(context HelmContext, name string, flags ...str
 	if len(decSuffix) == 0 {
 		decSuffix = ".yaml.dec"
 	}
-	decFilename := strings.Replace(name, ".yaml", decSuffix, 1)
+	decFilename := strings.Replace(absPath, ".yaml", decSuffix, 1)
 
 	// os.Rename seems to results in "cross-device link` errors in some cases
 	// Instead of moving, copy it to the destination temp file as a work-around

pkg/helmexec/exec_test.go

@@ -2,8 +2,10 @@ package helmexec
 
 import (
 	"bytes"
+	"fmt"
 	"os"
 	"path"
+	"path/filepath"
 	"reflect"
 	"testing"
 
@@ -213,10 +215,14 @@ func Test_DecryptSecret(t *testing.T) {
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "dev")
 	helm.DecryptSecret(HelmContext{}, "secretName")
-	expected := `Decrypting secret secretName
-exec: helm secrets dec secretName --kube-context dev
-exec: helm secrets dec secretName --kube-context dev: 
-`
+	cwd, err := filepath.Abs(".")
+	if err != nil {
+		t.Errorf("Error: %v", err)
+	}
+	expected := fmt.Sprintf(`Decrypting secret %s/secretName
+exec: helm secrets dec %s/secretName --kube-context dev
+exec: helm secrets dec %s/secretName --kube-context dev: 
+`, cwd, cwd, cwd)
 	if buffer.String() != expected {
 		t.Errorf("helmexec.DecryptSecret()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}