122 lines
3.1 KiB
Go
122 lines
3.1 KiB
Go
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/*
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Copyright 2015 The Kubernetes 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 main
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import (
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"fmt"
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"io/ioutil"
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"regexp"
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"strings"
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)
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const exampleToken = "EXAMPLE"
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const exampleLineStart = "<!-- BEGIN MUNGE: EXAMPLE"
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var exampleMungeTagRE = regexp.MustCompile(beginMungeTag(fmt.Sprintf("%s %s", exampleToken, `(([^ ])*[.]([^.]*))`)))
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// syncExamples updates all examples in markdown file.
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//
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// Finds the magic macro block tags, find the link to the example
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// specified in the tags, and replaces anything between those with
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// the content of the example, thereby syncing it.
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//
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// For example,
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// <!-- BEGIN MUNGE: EXAMPLE ../../examples/guestbook/frontend-service.yaml -->
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//
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// ```yaml
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// foo:
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// bar:
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// ```
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//
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// [Download example](../../examples/guestbook/frontend-service.yaml?raw=true)
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// <!-- END MUNGE: EXAMPLE -->
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func syncExamples(filePath string, mlines mungeLines) (mungeLines, error) {
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var err error
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type exampleTag struct {
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token string
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linkText string
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fileType string
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}
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exampleTags := []exampleTag{}
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// collect all example Tags
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for _, mline := range mlines {
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if mline.preformatted || !mline.beginTag {
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continue
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}
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line := mline.data
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if !strings.HasPrefix(line, exampleLineStart) {
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continue
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}
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match := exampleMungeTagRE.FindStringSubmatch(line)
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if len(match) < 4 {
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err = fmt.Errorf("Found unparsable EXAMPLE munge line %v", line)
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return mlines, err
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}
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tag := exampleTag{
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token: exampleToken + " " + match[1],
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linkText: match[1],
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fileType: match[3],
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}
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exampleTags = append(exampleTags, tag)
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}
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// update all example Tags
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for _, tag := range exampleTags {
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ft := ""
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if tag.fileType == "json" {
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ft = "json"
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}
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if tag.fileType == "yaml" {
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ft = "yaml"
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}
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example, err := exampleContent(filePath, tag.linkText, ft)
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if err != nil {
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return mlines, err
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}
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mlines, err = updateMacroBlock(mlines, tag.token, example)
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if err != nil {
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return mlines, err
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}
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}
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return mlines, nil
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}
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// exampleContent retrieves the content of the file at linkPath
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func exampleContent(filePath, linkPath, fileType string) (mungeLines, error) {
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repoRel, err := makeRepoRelative(linkPath, filePath)
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if err != nil {
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return nil, err
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}
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fileRel, err := makeFileRelative(linkPath, filePath)
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if err != nil {
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return nil, err
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}
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dat, err := ioutil.ReadFile(repoRel)
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if err != nil {
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return nil, err
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}
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// remove leading and trailing spaces and newlines
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trimmedFileContent := strings.TrimSpace(string(dat))
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content := fmt.Sprintf("\n```%s\n%s\n```\n\n[Download example](%s?raw=true)", fileType, trimmedFileContent, fileRel)
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out := getMungeLines(content)
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return out, nil
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}
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