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https://github.com/NVIDIA/nvidia-container-toolkit
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583793b7ae
This change adds a Requirements abstraction that can be used to check an images' NVIDIA_REQUIRE_* envvars against the host properties such as CUDA version or architecture. Signed-off-by: Evan Lezar <elezar@nvidia.com>
92 lines
2.0 KiB
Go
92 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 constraints
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import (
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"fmt"
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"strings"
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)
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// or represents an OR operation on a set of constraints
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type or []Constraint
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// and represents an AND (ALL) operation on a set of contraints
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type and []Constraint
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// AND constructs a new constraint that is the logical AND of the supplied constraints
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func AND(constraints []Constraint) Constraint {
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if len(constraints) == 0 {
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return &always{}
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}
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if len(constraints) == 1 {
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return constraints[0]
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}
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return and(constraints)
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}
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// OR constructs a new constrant that is the logical OR of the supplied constraints
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func OR(constraints []Constraint) Constraint {
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if len(constraints) == 0 {
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return nil
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}
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if len(constraints) == 1 {
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return constraints[0]
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}
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return or(constraints)
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}
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func (operands or) Assert() error {
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for _, o := range operands {
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// We stop on the first nil
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if err := o.Assert(); err == nil {
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return nil
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}
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}
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return fmt.Errorf("%v not met", operands)
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}
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func (operands or) String() string {
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var terms []string
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for _, o := range operands {
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terms = append(terms, o.String())
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}
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return strings.Join(terms, "||")
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}
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func (operands and) Assert() error {
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for _, o := range operands {
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// We stop on the first Assert
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if err := o.Assert(); err != nil {
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return err
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}
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}
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return nil
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}
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func (operands and) String() string {
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var terms []string
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for _, o := range operands {
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terms = append(terms, o.String())
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}
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return strings.Join(terms, "&&")
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}
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