Introduce a environment package in integration-cli

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

integration-cli/utils_test.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"github.com/docker/docker/pkg/integration/cmd"
+	"os/exec"
+)
+
+func getPrefixAndSlashFromDaemonPlatform() (prefix, slash string) {
+	if daemonPlatform == "windows" {
+		return "c:", `\`
+	}
+	return "", "/"
+}
+
+// TODO: update code to call cmd.RunCmd directly, and remove this function
+func runCommandWithOutput(execCmd *exec.Cmd) (string, int, error) {
+	result := cmd.RunCmd(transformCmd(execCmd))
+	return result.Combined(), result.ExitCode, result.Error
+}
+
+// Temporary shim for migrating commands to the new function
+func transformCmd(execCmd *exec.Cmd) cmd.Cmd {
+	return cmd.Cmd{
+		Command: execCmd.Args,
+		Env:     execCmd.Env,
+		Dir:     execCmd.Dir,
+		Stdin:   execCmd.Stdin,
+		Stdout:  execCmd.Stdout,
+	}
+}