nvidia-container-toolkit/internal/modifier/list.go
Evan Lezar 55ac8628c8 Add lists of modifiers to allow for modifier compositioning
Signed-off-by: Evan Lezar <elezar@nvidia.com>
2022-07-01 14:25:18 +02:00

55 lines
1.4 KiB
Go

/**
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
**/
package modifier
import (
"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
"github.com/opencontainers/runtime-spec/specs-go"
)
type list struct {
modifiers []oci.SpecModifier
}
// Merge merges a set of OCI specification modifiers as a list.
// This can be used to compose modifiers.
func Merge(modifiers ...oci.SpecModifier) oci.SpecModifier {
var filteredModifiers []oci.SpecModifier
for _, m := range modifiers {
if m == nil {
continue
}
filteredModifiers = append(filteredModifiers, m)
}
return list{
modifiers: filteredModifiers,
}
}
// Modify applies a list of modifiers in sequence and returns on any errors encountered.
func (m list) Modify(spec *specs.Spec) error {
for _, mm := range m.modifiers {
err := mm.Modify(spec)
if err != nil {
return err
}
}
return nil
}