mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 13:05:17 +00:00
101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
/**
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# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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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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**/
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package list
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import (
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"errors"
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"fmt"
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"github.com/urfave/cli/v2"
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"tags.cncf.io/container-device-interface/pkg/cdi"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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)
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type command struct {
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logger logger.Interface
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}
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type config struct {
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cdiSpecDirs cli.StringSlice
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}
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// NewCommand constructs a cdi list command with the specified logger
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func NewCommand(logger logger.Interface) *cli.Command {
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c := command{
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logger: logger,
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}
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return c.build()
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}
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// build creates the CLI command
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func (m command) build() *cli.Command {
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cfg := config{}
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// Create the command
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c := cli.Command{
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Name: "list",
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Usage: "List the available CDI devices",
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Before: func(c *cli.Context) error {
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return m.validateFlags(c, &cfg)
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},
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Action: func(c *cli.Context) error {
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return m.run(c, &cfg)
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},
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}
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c.Flags = []cli.Flag{
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&cli.StringSliceFlag{
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Name: "spec-dir",
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Usage: "specify the directories to scan for CDI specifications",
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Value: cli.NewStringSlice(cdi.DefaultSpecDirs...),
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Destination: &cfg.cdiSpecDirs,
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},
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}
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return &c
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}
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func (m command) validateFlags(c *cli.Context, cfg *config) error {
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if len(cfg.cdiSpecDirs.Value()) == 0 {
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return errors.New("at least one CDI specification directory must be specified")
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}
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return nil
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}
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func (m command) run(c *cli.Context, cfg *config) error {
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registry, err := cdi.NewCache(
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cdi.WithAutoRefresh(false),
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cdi.WithSpecDirs(cfg.cdiSpecDirs.Value()...),
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)
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if err != nil {
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return fmt.Errorf("failed to create CDI cache: %v", err)
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}
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refreshErr := registry.Refresh()
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devices := registry.ListDevices()
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m.logger.Infof("Found %d CDI devices", len(devices))
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if refreshErr != nil {
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m.logger.Warningf("Refreshing the CDI registry returned the following error(s): %v", refreshErr)
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}
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for _, device := range devices {
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fmt.Printf("%s\n", device)
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}
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return nil
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}
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