| // 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 main |
| |
| import ( |
| "context" |
| "flag" |
| "fmt" |
| "log" |
| "path/filepath" |
| "strings" |
| |
| "github.com/google/subcommands" |
| "go.chromium.org/luci/auth/client/authcli" |
| "go.chromium.org/luci/hardcoded/chromeinfra" |
| "go.fuchsia.dev/infra/artifacts" |
| "go.fuchsia.dev/infra/buildbucket" |
| "golang.org/x/sync/errgroup" |
| ) |
| |
| type artifactsClient interface { |
| GetBuildDir(bucket, build string) artifacts.Directory |
| } |
| |
| type CopyCommand struct { |
| authFlags authcli.Flags |
| |
| build string |
| // The remote filepath with the target build's Cloud Storage directory. |
| source string |
| |
| // The local path to write the artifact to. |
| dest string |
| |
| // Whether source should be relative to the Cloud Storage bucket's root directory. |
| // If false, source will be relative to the target build's Cloud Storage directory. |
| fromRoot bool |
| } |
| |
| func (*CopyCommand) Name() string { |
| return "cp" |
| } |
| |
| func (*CopyCommand) Usage() string { |
| return "cp [flags...]" |
| } |
| |
| func (*CopyCommand) Synopsis() string { |
| return "fetches an artifact produced by a Fuchsia builder" |
| } |
| |
| func (cmd *CopyCommand) SetFlags(f *flag.FlagSet) { |
| cmd.authFlags.Register(flag.CommandLine, chromeinfra.DefaultAuthOptions()) |
| f.StringVar(&cmd.build, "build", "", "the ID of the build that produced the artifacts") |
| f.StringVar(&cmd.source, "src", "", "The artifact file or directory to download from the build's Cloud Storage directory") |
| f.StringVar(&cmd.dest, "dst", "", "The local path to write the artifact(s) to") |
| f.BoolVar(&cmd.fromRoot, "root", false, "Whether src is relative to the root directory of the Cloud Storage bucket."+ |
| "If false, src will be taken as a relative path to the build-specific directory under the Cloud Storage bucket.") |
| } |
| |
| func (cmd *CopyCommand) Execute(ctx context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus { |
| if err := cmd.validateAndExecute(ctx); err != nil { |
| log.Println(err) |
| return subcommands.ExitFailure |
| } |
| return subcommands.ExitSuccess |
| } |
| |
| func (cmd *CopyCommand) validateAndExecute(ctx context.Context) error { |
| opts, err := cmd.authFlags.Options() |
| if err != nil { |
| return err |
| } |
| |
| if cmd.source == "" { |
| return fmt.Errorf("missing -src") |
| } |
| |
| if cmd.dest == "" { |
| return fmt.Errorf("missing -dst") |
| } |
| |
| buildsCli, err := buildbucket.NewBuildsClient(ctx, buildbucket.DefaultHost, opts) |
| if err != nil { |
| return fmt.Errorf("failed to create builds client: %v", err) |
| } |
| |
| artifactsCli, err := artifacts.NewClient(ctx, opts) |
| if err != nil { |
| return fmt.Errorf("failed to create artifacts client: %v", err) |
| } |
| |
| return cmd.execute(ctx, buildsCli, artifactsCli) |
| } |
| |
| func (cmd *CopyCommand) execute(ctx context.Context, buildsCli buildsClient, artifactsCli artifactsClient) error { |
| // If cmd.source is an archive, it will have an extension like .tgz or .tar.gz. |
| // Otherwise, we assume it to be a directory in the artifacts bucket. |
| // getStorageBucket will retrieve the appropriate bucket based on whether the source |
| // is an archive or not. |
| fetchArchive := filepath.Ext(cmd.source) != "" |
| bucket, err := getStorageBucket(ctx, buildsCli, cmd.build, fetchArchive) |
| if err != nil { |
| return err |
| } |
| |
| build := cmd.build |
| if cmd.fromRoot { |
| build = "" |
| } |
| dir := artifactsCli.GetBuildDir(bucket, build) |
| objs, err := dir.List(ctx, cmd.source) |
| if err != nil { |
| return err |
| } |
| var eg errgroup.Group |
| for _, obj := range objs { |
| obj := obj |
| eg.Go(func() error { |
| var dest string |
| if obj == cmd.source { |
| // cmd.source is a single artifact. Copy it directly to cmd.dest. |
| dest = cmd.dest |
| } else { |
| // obj is a path relative to the dir with cmd.source as its prefix. |
| // We want to get the relative path to cmd.source so that we can write |
| // it to the same relative path to cmd.dest. |
| relPath := strings.TrimPrefix(obj, cmd.source+"/") |
| dest = filepath.Join(cmd.dest, relPath) |
| } |
| if err := dir.CopyFile(ctx, obj, dest); err != nil { |
| return err |
| } |
| return nil |
| }) |
| } |
| return eg.Wait() |
| } |