blob: b4aaa6d76c7c9d0ce6e122fc0521717c8eadd0a2 [file] [log] [blame]
// Copyright 2020 The Chromium 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 cli
import (
dirmdpb "infra/tools/dirmd/proto"
func cmdCompute() *subcommands.Command {
return &subcommands.Command{
UsageLine: `compute -root ROOT TARGET1 [TARGET2...]`,
ShortDesc: "compute metadata for the given target directories",
Advanced: true,
LongDesc: text.Doc(`
DEPRECATED: use "dirmd read" instead.
Compute metadata for the given target directories.
The output format is JSON form of chrome.dir_meta.Mapping protobuf
message, same as "export" subcommand.
The returned mapping contains entries only for the explicitly
specified target dirs. Each entry includes inherited metadata.
Unlike export subcommand, this subcommand reads metadata from only the
targets and their ancestors up to the ROOT. This is different from export
subcommand which uses git-ls-files:
1) compute subcommand normally reads much fewer files.
2) compute subcommand does not respect git-ignored files.
The latter indicates a slightly different semantics, but this should not
make any difference in the vast majority of cases because it is confusing to
have git-ignored DIR_METADATA in the middle of the ancestry chain, which
might indicate that DIR_METADATA files are used incorrectly.
This can be fixed, but it would come with a performance penalty.
CommandRun: func() subcommands.CommandRun {
r := &computeRun{}
r.Flags.String("root", "", "Deprecated, ignored")
return r
type computeRun struct {
func (r *computeRun) Run(a subcommands.Application, args []string, env subcommands.Env) int {
ctx := cli.GetContext(a, r, env)
return r.done(ctx,, args))
func (r *computeRun) run(ctx context.Context, targets []string) error {
mapping, err := dirmd.ReadMapping(ctx, dirmdpb.MappingForm_SPARSE, targets...)
if err != nil {
return err
return r.writeMapping(mapping)