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https://github.com/NVIDIA/nvidia-container-toolkit
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acc0afbb7a
The Relative method added to the Locator interface was not correctly implemented in the file type. The root was never set when instantiating the object. This change removes this method from the interface and the file type, switching to a local implementation in the mounts type instead. Signed-off-by: Evan Lezar <elezar@nvidia.com>
93 lines
2.6 KiB
Go
93 lines
2.6 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 lookup
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import (
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"fmt"
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"os"
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"path/filepath"
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log "github.com/sirupsen/logrus"
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)
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// file can be used to locate file (or file-like elements) at a specified set of
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// prefixes. The validity of a file is determined by a filter function.
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type file struct {
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logger *log.Logger
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prefixes []string
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filter func(string) error
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}
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// NewFileLocator creates a Locator that can be used to find files at the specified root. A logger
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// can also be specified.
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func NewFileLocator(logger *log.Logger, root string) Locator {
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l := newFileLocator(logger, root)
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return &l
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}
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func newFileLocator(logger *log.Logger, root string) file {
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return file{
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logger: logger,
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prefixes: []string{root},
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filter: assertFile,
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}
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}
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var _ Locator = (*file)(nil)
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// Locate attempts to find files with names matching the specified pattern.
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// All prefixes are searched and any matching candidates are returned. If no matches are found, an error is returned.
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func (p file) Locate(pattern string) ([]string, error) {
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var filenames []string
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for _, prefix := range p.prefixes {
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pathPattern := filepath.Join(prefix, pattern)
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candidates, err := filepath.Glob(pathPattern)
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if err != nil {
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p.logger.Debugf("Checking pattern '%v' failed: %v", pathPattern, err)
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}
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for _, candidate := range candidates {
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p.logger.Debugf("Checking candidate '%v'", candidate)
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err := p.filter(candidate)
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if err != nil {
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p.logger.Debugf("Candidate '%v' does not meet requirements: %v", candidate, err)
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continue
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}
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filenames = append(filenames, candidate)
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}
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}
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if len(filenames) == 0 {
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return nil, fmt.Errorf("pattern %v not found", pattern)
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}
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return filenames, nil
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}
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// assertFile checks whether the specified path is a regular file
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func assertFile(filename string) error {
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info, err := os.Stat(filename)
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if err != nil {
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return fmt.Errorf("error getting info for %v: %v", filename, err)
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}
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if info.IsDir() {
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return fmt.Errorf("specified path '%v' is a directory", filename)
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}
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return nil
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}
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