mirror of
https://gitea.com/Lydanne/buildx.git
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81 lines
2.5 KiB
Go
81 lines
2.5 KiB
Go
/*
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Copyright 2020 The Compose Specification Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 graph
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import (
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"context"
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"fmt"
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"github.com/compose-spec/compose-go/v2/types"
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)
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// InDependencyOrder walk the service graph an invoke VisitorFn in respect to dependency order
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func InDependencyOrder(ctx context.Context, project *types.Project, fn VisitorFn[types.ServiceConfig], options ...func(*Options)) error {
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_, err := CollectInDependencyOrder[any](ctx, project, func(ctx context.Context, s string, config types.ServiceConfig) (any, error) {
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return nil, fn(ctx, s, config)
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}, options...)
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return err
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}
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// CollectInDependencyOrder walk the service graph an invoke CollectorFn in respect to dependency order, then return result for each call
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func CollectInDependencyOrder[T any](ctx context.Context, project *types.Project, fn CollectorFn[types.ServiceConfig, T], options ...func(*Options)) (map[string]T, error) {
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graph, err := newGraph(project)
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if err != nil {
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return nil, err
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}
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t := newTraversal(fn)
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for _, option := range options {
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option(t.Options)
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}
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err = walk(ctx, graph, t)
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return t.results, err
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}
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// newGraph creates a service graph from project
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func newGraph(project *types.Project) (*graph[types.ServiceConfig], error) {
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g := &graph[types.ServiceConfig]{
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vertices: map[string]*vertex[types.ServiceConfig]{},
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}
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for name, s := range project.Services {
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g.addVertex(name, s)
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}
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for name, s := range project.Services {
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src := g.vertices[name]
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for dep, condition := range s.DependsOn {
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dest, ok := g.vertices[dep]
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if !ok {
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if condition.Required {
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if ds, exists := project.DisabledServices[dep]; exists {
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return nil, fmt.Errorf("service %q is required by %q but is disabled. Can be enabled by profiles %s", dep, name, ds.Profiles)
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}
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return nil, fmt.Errorf("service %q depends on unknown service %q", name, dep)
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}
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delete(s.DependsOn, name)
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project.Services[name] = s
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continue
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}
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src.children[dep] = dest
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dest.parents[name] = src
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}
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}
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err := g.checkCycle()
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return g, err
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}
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