Provide getters for stdout, stderr on ShellRunner, ExecRunner (#1787)

* Provide getters for stdout, stderr on ShellRunner, ExecRunner

we need that in order to set the streams back in case we have to scan the command
output ourselvs during some function calls.

pkg/command/command.go

@@ -30,6 +30,8 @@ type runner interface {
 	AppendEnv(env []string)
 	Stdout(out io.Writer)
 	Stderr(err io.Writer)
+	GetStdout() io.Writer
+	GetStderr() io.Writer
 }
 
 // ExecRunner mock for intercepting calls to executables
@@ -70,6 +72,16 @@ func (c *Command) Stderr(stderr io.Writer) {
 	c.stderr = stderr
 }
 
+// GetStdout Returns the writer for stdout
+func (c *Command) GetStdout() io.Writer {
+	return c.stdout
+}
+
+//GetStderr Retursn the writer for stderr
+func (c *Command) GetStderr() io.Writer {
+	return c.stderr
+}
+
 // ExecCommand defines how to execute os commands
 var ExecCommand = exec.Command
 

pkg/mock/runner.go

@@ -90,10 +90,18 @@ func (m *ExecMockRunner) Stdout(out io.Writer) {
 	m.stdout = out
 }
 
+func (m *ExecMockRunner) GetStdout() io.Writer {
+	return m.stdout
+}
+
 func (m *ExecMockRunner) Stderr(err io.Writer) {
 	m.stderr = err
 }
 
+func (m *ExecMockRunner) GetStderr() io.Writer {
+	return m.stderr
+}
+
 func (m *ShellMockRunner) SetDir(d string) {
 	m.Dir = d
 }
@@ -189,6 +197,14 @@ func (m *ShellMockRunner) Stdout(out io.Writer) {
 	m.stdout = out
 }
 
+func (m *ShellMockRunner) GetStdout() io.Writer {
+	return m.stdout
+}
+
+func (m *ShellMockRunner) GetStderr() io.Writer {
+	return m.stderr
+}
+
 func (m *ShellMockRunner) Stderr(err io.Writer) {
 	m.stderr = err
 }