mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 00:08:11 +00:00
84 lines
2.0 KiB
Go
84 lines
2.0 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 oci
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import (
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"fmt"
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"strings"
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"github.com/opencontainers/runtime-spec/specs-go"
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)
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type memorySpec struct {
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*specs.Spec
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}
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// NewMemorySpec creates a Spec instance from the specified OCI spec
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func NewMemorySpec(spec *specs.Spec) Spec {
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s := memorySpec{
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Spec: spec,
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}
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return &s
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}
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// Load is a no-op for the memorySpec spec
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func (s *memorySpec) Load() (*specs.Spec, error) {
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return s.Spec, nil
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}
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// Flush is a no-op for the memorySpec spec
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func (s *memorySpec) Flush() error {
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return nil
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}
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// Modify applies the specified SpecModifier to the stored OCI specification.
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func (s *memorySpec) Modify(m SpecModifier) error {
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if s.Spec == nil {
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return fmt.Errorf("cannot modify nil spec")
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}
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return m.Modify(s.Spec)
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}
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// LookupEnv mirrors os.LookupEnv for the OCI specification. It
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// retrieves the value of the environment variable named
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// by the key. If the variable is present in the environment the
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// value (which may be empty) is returned and the boolean is true.
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// Otherwise the returned value will be empty and the boolean will
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// be false.
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func (s memorySpec) LookupEnv(key string) (string, bool) {
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if s.Spec == nil || s.Spec.Process == nil {
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return "", false
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}
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for _, env := range s.Spec.Process.Env {
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if !strings.HasPrefix(env, key) {
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continue
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}
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parts := strings.SplitN(env, "=", 2)
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if parts[0] == key {
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if len(parts) < 2 {
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return "", true
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}
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return parts[1], true
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}
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}
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return "", false
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}
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