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83 lines
3.0 KiB
83 lines
3.0 KiB
/*
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Copyright The Helm 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 util
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import (
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"fmt"
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"regexp"
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"strconv"
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"strings"
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"unicode"
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)
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// SimpleHead defines what the structure of the head of a manifest file
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type SimpleHead struct {
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Version string `json:"apiVersion"`
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Kind string `json:"kind,omitempty"`
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Metadata *struct {
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Name string `json:"name"`
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Annotations map[string]string `json:"annotations"`
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} `json:"metadata,omitempty"`
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}
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var sep = regexp.MustCompile(`(?m)^---[ \t]*`)
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// SplitManifests takes a manifest string and returns a map containing individual manifests.
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//
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// **Note for Chart API v3**: This function (due to the regex above) has allowed _WRONG_
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// Go templates to be defined inside charts across the years. The generated text from Go
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// templates may contain `---apiVersion: v1`, and this function magically splits this back
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// to `---\napiVersion: v1`. This has caused issues recently after Helm 4 introduced
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// kio.ParseAll to inject annotations when post-renderers are used. In Chart API v3,
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// we should kill this regex with fire (or change it) and expose charts doing the wrong
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// thing Go template-wise. Helm should say a big _NO_ to charts doing the wrong thing,
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// with or without post-renderers.
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func SplitManifests(bigFile string) map[string]string {
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// Basically, we're quickly splitting a stream of YAML documents into an
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// array of YAML docs. The file name is just a place holder, but should be
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// integer-sortable so that manifests get output in the same order as the
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// input (see `BySplitManifestsOrder`).
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tpl := "manifest-%d"
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res := map[string]string{}
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// Making sure that any extra whitespace in YAML stream doesn't interfere in splitting documents correctly.
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bigFileTmp := strings.TrimLeftFunc(bigFile, unicode.IsSpace)
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docs := sep.Split(bigFileTmp, -1)
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var count int
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for _, d := range docs {
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if strings.TrimSpace(d) == "" {
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continue
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}
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d = strings.TrimLeftFunc(d, unicode.IsSpace)
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res[fmt.Sprintf(tpl, count)] = d
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count++
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}
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return res
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}
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// BySplitManifestsOrder sorts by in-file manifest order, as provided in function `SplitManifests`
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type BySplitManifestsOrder []string
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func (a BySplitManifestsOrder) Len() int { return len(a) }
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func (a BySplitManifestsOrder) Less(i, j int) bool {
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// Split `manifest-%d`
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anum, _ := strconv.ParseInt(a[i][len("manifest-"):], 10, 0)
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bnum, _ := strconv.ParseInt(a[j][len("manifest-"):], 10, 0)
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return anum < bnum
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}
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func (a BySplitManifestsOrder) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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