mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 08:46:52 +00:00
83 lines
1.9 KiB
Go
83 lines
1.9 KiB
Go
/**
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# Copyright (c) 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 flags
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import (
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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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)
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// Options stores options for the config commands
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type Options struct {
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Config string
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Output string
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InPlace bool
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}
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// Validate checks whether the options are valid.
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func (o Options) Validate() error {
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if o.InPlace && o.Output != "" {
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return fmt.Errorf("cannot specify both --in-place and --output")
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}
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return nil
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}
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// GetOutput returns the effective output
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func (o Options) GetOutput() string {
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if o.InPlace {
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return o.Config
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}
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return o.Output
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}
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// EnsureOutputFolder creates the output folder if it does not exist.
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// If the output folder is not specified (i.e. output to STDOUT), it is ignored.
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func (o Options) EnsureOutputFolder() error {
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output := o.GetOutput()
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if output == "" {
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return nil
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}
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if dir := filepath.Dir(output); dir != "" {
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return os.MkdirAll(dir, 0755)
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}
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return nil
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}
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// CreateOutput creates the writer for the output.
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func (o Options) CreateOutput() (io.WriteCloser, error) {
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output := o.GetOutput()
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if output == "" {
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return nullCloser{os.Stdout}, nil
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}
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return os.Create(output)
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}
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// nullCloser is a writer that does nothing on Close.
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type nullCloser struct {
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io.Writer
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}
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// Close is a no-op for a nullCloser.
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func (d nullCloser) Close() error {
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return nil
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}
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