mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-25 05:21:33 +00:00
148 lines
3.5 KiB
Go
148 lines
3.5 KiB
Go
/**
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# Copyright (c) 2021, 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 csv
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import (
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"bufio"
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"errors"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strings"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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)
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const (
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// DefaultMountSpecPath is default location of CSV files that define the modifications required to the OCI spec
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DefaultMountSpecPath = "/etc/nvidia-container-runtime/host-files-for-container.d"
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)
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// DefaultFileList returns the list of CSV files that are used by default.
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func DefaultFileList() []string {
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files := []string{
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"devices.csv",
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"drivers.csv",
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"l4t.csv",
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}
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var paths []string
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for _, file := range files {
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paths = append(paths, filepath.Join(DefaultMountSpecPath, file))
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}
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return paths
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}
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// GetFileList returns the (non-recursive) list of CSV files in the specified
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// folder
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func GetFileList(root string) ([]string, error) {
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contents, err := os.ReadDir(root)
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if err != nil && errors.Is(err, os.ErrNotExist) {
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return nil, nil
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} else if err != nil {
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return nil, fmt.Errorf("failed to read the contents of %v: %v", root, err)
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}
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var csvFilePaths []string
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for _, c := range contents {
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if c.IsDir() {
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continue
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}
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if c.Name() == ".csv" {
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continue
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}
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ext := strings.ToLower(filepath.Ext(c.Name()))
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if ext != ".csv" {
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continue
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}
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csvFilePaths = append(csvFilePaths, filepath.Join(root, c.Name()))
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}
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return csvFilePaths, nil
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}
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// BaseFilesOnly filters out non-base CSV files from the list of CSV files.
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func BaseFilesOnly(filenames []string) []string {
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filter := map[string]bool{
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"l4t.csv": true,
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"drivers.csv": true,
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"devices.csv": true,
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}
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var selected []string
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for _, file := range filenames {
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base := filepath.Base(file)
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if filter[base] {
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selected = append(selected, file)
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}
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}
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return selected
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}
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// Parser specifies an interface for parsing MountSpecs
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type Parser interface {
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Parse() ([]*MountSpec, error)
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}
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type csv struct {
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logger logger.Interface
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filename string
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}
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// NewCSVFileParser creates a new parser for reading MountSpecs from the specified CSV file
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func NewCSVFileParser(logger logger.Interface, filename string) Parser {
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p := csv{
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logger: logger,
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filename: filename,
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}
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return &p
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}
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// Parse parses the csv file and returns a list of MountSpecs in the file
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func (p csv) Parse() ([]*MountSpec, error) {
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reader, err := os.Open(p.filename)
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if err != nil {
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return nil, fmt.Errorf("failed to open %v for reading: %v", p.filename, err)
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}
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defer reader.Close()
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return p.parseFromReader(reader), nil
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}
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// parseFromReader parses the specified file and returns a list of required jetson mounts
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func (p csv) parseFromReader(reader io.Reader) []*MountSpec {
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var targets []*MountSpec
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scanner := bufio.NewScanner(reader)
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for scanner.Scan() {
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line := scanner.Text()
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target, err := NewMountSpecFromLine(line)
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if err != nil {
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p.logger.Debugf("Skipping invalid mount spec '%v': %v", line, err)
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continue
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}
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targets = append(targets, target)
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}
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return targets
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}
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