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https://github.com/NVIDIA/nvidia-container-toolkit
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4177fddcc4
This change imports the modifying runtime abstraction from the experimental branch. This encapsulates the checks for whether modification is required, and forwards the loaded spec to the specified modifier. This allows for the same code to be reused when performing more complex modifications. Signed-off-by: Evan Lezar <elezar@nvidia.com>
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() error {
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return 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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