Renamed docker-classic to “com.docker.com”.

cli/mobycli/exec.go

@@ -0,0 +1,65 @@
+package mobycli
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/spf13/cobra"
+
+	apicontext "github.com/docker/api/context"
+	"github.com/docker/api/context/store"
+)
+
+// ComDockerCli name of the classic cli binary
+const ComDockerCli = "com.docker.cli"
+
+// Exec delegates to com.docker.cli
+func Exec(ctx context.Context) {
+	currentContext := apicontext.CurrentContext(ctx)
+	s := store.ContextStore(ctx)
+
+	_, err := s.Get(currentContext)
+	// Only run original docker command if the current context is not
+	// ours.
+	if err != nil {
+		cmd := exec.CommandContext(ctx, ComDockerCli, os.Args[1:]...)
+		cmd.Stdin = os.Stdin
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		if err := cmd.Run(); err != nil {
+			if exiterr, ok := err.(*exec.ExitError); ok {
+				os.Exit(exiterr.ExitCode())
+			}
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+		}
+		os.Exit(0)
+	}
+}
+
+// ExecCmd delegates the cli command to com.docker.cli. The error is never returned (process will exit with docker classic exit code), the return type is to make it easier to use with cobra commands
+func ExecCmd(command *cobra.Command) error {
+	Exec(command.Context())
+	return nil
+}
+
+// IsDefaultContextCommand checks if the command exists in the classic cli (issues a shellout --help)
+func IsDefaultContextCommand(dockerCommand string) bool {
+	cmd := exec.Command(ComDockerCli, dockerCommand, "--help")
+	b, e := cmd.CombinedOutput()
+	if e != nil {
+		fmt.Println(e)
+	}
+	output := string(b)
+	contains := strings.Contains(output, "Usage:\tdocker "+dockerCommand)
+	return contains
+}
+
+// ExecSilent executes a command and do redirect output to stdOut, return output
+func ExecSilent(ctx context.Context) ([]byte, error) {
+	cmd := exec.CommandContext(ctx, ComDockerCli, os.Args[1:]...)
+	return cmd.CombinedOutput()
+}