// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package build

import (
	"encoding/json"
	"fmt"
	"os"
)

// Tool represents a host tool in the build.
type Tool struct {
	// Name is the canonical name of the image.
	Name string `json:"name"`

	// Path is relative path to the tool within the build directory.
	Path string `json:"path"`

	// OS is the operating system the tool is meant to run on.
	OS string

	// CPU is the architecture the tool is meant to run on.
	CPU string
}

func loadTools(manifest string) ([]Tool, error) {
	f, err := os.Open(manifest)
	if err != nil {
		return nil, fmt.Errorf("failed to open %s: %w", manifest, err)
	}
	defer f.Close()
	var tools []Tool
	if err := json.NewDecoder(f).Decode(&tools); err != nil {
		return nil, fmt.Errorf("failed to decode %s: %w", manifest, err)
	}
	return tools, nil
}