checkout/checkout.go

// Copyright 2019 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 checkout

import (
	"context"
	"net/url"
	"os"

	buildbucketpb "go.chromium.org/luci/buildbucket/proto"
	"go.fuchsia.dev/infra/execution"
)

// Checkout checks out the git repo at repoURL according to the given build
// input.
//
// defaultRevision specifies the revision to check out if the build was
// triggered by a commit or change on a *different* repository, in which case we
// can't use the build input to determine which revision of `repoURL` to check
// out.
func Checkout(ctx context.Context, input *buildbucketpb.Build_Input, repoURL url.URL, defaultRevision, dir string) error {
	strat, err := newStrategy(input, repoURL, defaultRevision)
	if err != nil {
		return err
	}
	// Write everything to stderr. luciexe expects the stdout of the
	// recipe_bootstrap tool to be a proto.
	executor := execution.NewExecutor(os.Stderr, os.Stderr, dir)
	return strat.Checkout(ctx, executor)
}