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https://github.com/hanzoai/visor.git
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Rex RenandgVisor bot
27de98508e
Refactored the `runsc features` logic into specutils Support direct in-memory lookup in the shim and avoid the fork/exec roundtrip Test result: http://sponge2/4543eb2c-c239-4459-8700-bf89ef081088 PiperOrigin-RevId: 919150093
68 lines
2.0 KiB
Go
68 lines
2.0 KiB
Go
// Copyright 2026 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmd
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import (
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"context"
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"encoding/json"
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"os"
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"github.com/google/subcommands"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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"gvisor.dev/gvisor/runsc/config"
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"gvisor.dev/gvisor/runsc/flag"
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"gvisor.dev/gvisor/runsc/specutils"
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)
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// Features implements subcommands.Command for the "features" command.
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type Features struct{}
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// Name implements subcommands.command.name.
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func (*Features) Name() string {
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return "features"
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}
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// Synopsis implements subcommands.Command.Synopsis.
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func (*Features) Synopsis() string {
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return "list CPU features supported on current machine"
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}
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// Usage implements subcommands.Command.Usage.
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func (*Features) Usage() string {
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return "features\n"
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}
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// SetFlags implements subcommands.Command.SetFlags.
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func (*Features) SetFlags(*flag.FlagSet) {}
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// FetchSpec implements util.SubCommand.FetchSpec.
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func (*Features) FetchSpec(_ *config.Config, _ *flag.FlagSet) (string, *specs.Spec, error) {
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// This command does not operate on a single container, so nothing to fetch.
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return "", nil, nil
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}
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// Execute implements subcommands.Command.Execute.
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func (*Features) Execute(_ context.Context, _ *flag.FlagSet, args ...any) subcommands.ExitStatus {
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feat := specutils.Features()
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enc := json.NewEncoder(os.Stdout)
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enc.SetIndent("", " ")
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if err := enc.Encode(feat); err != nil {
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return subcommands.ExitFailure
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}
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return subcommands.ExitSuccess
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}
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