fix: add error message for podman compose providers

Signed-off-by: Andrew Steurer <94206073+asteurer@users.noreply.github.com>

Author: asteurer

cmd/root.go

@@ -56,6 +56,25 @@ func detectContainerRuntime() (string, error) {
 		return "", fmt.Errorf("Unable to detect container runtime.\nPlease ensure at least one of the following is installed and in the PATH: %s\n", strings.Join(runtimesToCheck, ", "))
 	}
 
+	if runtime == "podman" {
+		// Podman doesn't auto-install a compose provider
+		composeProvidersToCheck := []string{"podman-compose", "docker-compose"}
+		composeProvider := ""
+		for _, rt := range composeProvidersToCheck {
+			cmd := exec.Command(rt, "--version")
+			if err := cmd.Run(); err != nil {
+				continue
+			}
+
+			composeProvider = rt
+			break
+		}
+
+		if composeProvider == "" {
+			return "", fmt.Errorf("Unable to detect compose provider.\n Please ensure at least one of the following is installed and in the PATH: %s\n", strings.Join(composeProvidersToCheck, ", "))
+		}
+	}
+
 	cmd := exec.Command(runtime, "info")
 	if err := cmd.Run(); err != nil {
 		return "", fmt.Errorf("The daemon/virtual machine for %[1]s appears not to be running. Please check the documentation for %[1]s for more information.", runtime)