// Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0

package exec

import (
	"io"
	"os"
	"os/exec"

	"sigs.k8s.io/kustomize/kyaml/fn/runtime/runtimeutil"
	"sigs.k8s.io/kustomize/kyaml/yaml"
)

type Filter struct {
	// Path is the path to the executable to run
	Path string `yaml:"path,omitempty"`

	// Args are the arguments to the executable
	Args []string `yaml:"args,omitempty"`

	runtimeutil.FunctionFilter
}

func (c *Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
	c.FunctionFilter.Run = c.Run
	return c.FunctionFilter.Filter(nodes)
}

func (c *Filter) Run(reader io.Reader, writer io.Writer) error {
	cmd := exec.Command(c.Path, c.Args...)
	cmd.Stdin = reader
	cmd.Stdout = writer
	cmd.Stderr = os.Stderr
	return cmd.Run()
}