tools/src/cmd/cts/format/format.go

// Copyright 2022 The Dawn & Tint Authors
//
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//     this list of conditions and the following disclaimer in the documentation
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package format

import (
	"context"
	"flag"
	"strings"

	"dawn.googlesource.com/dawn/tools/src/cmd/cts/common"
	"dawn.googlesource.com/dawn/tools/src/cts/expectations"
)

func init() {
	common.Register(&cmd{})
}

type cmd struct {
	flags struct {
		expectations string // expectations file path
	}
}

func (cmd) Name() string {
	return "format"
}

func (cmd) Desc() string {
	return "formats a WebGPU expectations.txt file"
}

func (c *cmd) RegisterFlags(ctx context.Context, cfg common.Config) ([]string, error) {
	defaultExpectations := []string{
		common.DefaultExpectationsPath(cfg.OsWrapper),
		common.DefaultCompatExpectationsPath(cfg.OsWrapper),
	}
	flag.StringVar(&c.flags.expectations, "expectations", strings.Join(defaultExpectations, ","), "comma separated path to CTS expectation files to update")
	return nil, nil
}

func (c *cmd) Run(ctx context.Context, cfg common.Config) error {
	for _, path := range strings.Split(c.flags.expectations, ",") {
		path := strings.TrimSpace(path)

		ex, err := expectations.Load(path, cfg.OsWrapper)
		if err != nil {
			return err
		}

		ex.Format()

		if err := ex.Save(path, cfg.OsWrapper); err != nil {
			return err
		}
	}
	return nil
}