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4833bb4a3e
* Preserve YAML comments & style when resolving/applying This is accomplished by adopting the yaml.v3 lib. It exposes a Node struct that's used internally by the yaml encoder/decoder ko internally now manipulates YAML documents using this struct Fixes #101 * add/remove vendored modules * Apply suggestions from code review Fix comments Co-Authored-By: jonjohnsonjr <jonjohnson@google.com> * update doc link * Fix use of yaml.Decoder in a test When the yaml.Decoder returns an io.EOF it implies there were no YAML documents decoded and that there are no more! * Update pkg/resolve/resolve.go resolve comment suggestion Co-Authored-By: jonjohnsonjr <jonjohnson@google.com> * leave ko prefix if we're not operating in strict mode * move testutils to internal/testing
103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
// Copyright 2018 Google LLC 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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package resolve
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import (
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"fmt"
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"strings"
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"sync"
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"github.com/dprotaso/go-yit"
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"github.com/google/ko/pkg/build"
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"github.com/google/ko/pkg/publish"
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"golang.org/x/sync/errgroup"
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"gopkg.in/yaml.v3"
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)
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const koPrefix = "ko://"
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// ImageReferences resolves supported references to images within the input yaml
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// to published image digests.
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//
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// If a reference can be built and pushed, its yaml.Node will be mutated.
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func ImageReferences(docs []*yaml.Node, strict bool, builder build.Interface, publisher publish.Interface) error {
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// First, walk the input objects and collect a list of supported references
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refs := make(map[string][]*yaml.Node)
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for _, doc := range docs {
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it := refsFromDoc(doc, strict)
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for node, ok := it(); ok; node, ok = it() {
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ref := strings.TrimSpace(node.Value)
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tref := strings.TrimPrefix(ref, koPrefix)
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if builder.IsSupportedReference(tref) {
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refs[tref] = append(refs[tref], node)
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} else if strict {
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return fmt.Errorf("found strict reference but %s is not a valid import path", ref)
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}
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}
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}
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// Next, perform parallel builds for each of the supported references.
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var sm sync.Map
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var errg errgroup.Group
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for ref := range refs {
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ref := ref
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errg.Go(func() error {
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img, err := builder.Build(ref)
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if err != nil {
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return err
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}
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digest, err := publisher.Publish(img, ref)
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if err != nil {
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return err
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}
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sm.Store(ref, digest.String())
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return nil
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})
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}
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if err := errg.Wait(); err != nil {
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return err
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}
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// Walk the tags and update them with their digest.
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for ref, nodes := range refs {
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digest, ok := sm.Load(ref)
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if !ok {
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return fmt.Errorf("resolved reference to %q not found", ref)
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}
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for _, node := range nodes {
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node.Value = digest.(string)
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}
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}
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return nil
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}
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func refsFromDoc(doc *yaml.Node, strict bool) yit.Iterator {
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it := yit.FromNode(doc).
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RecurseNodes().
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Filter(yit.StringValue)
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if strict {
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return it.Filter(yit.WithPrefix(koPrefix))
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}
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return it
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}
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