mirror of
https://gitee.com/gitea/gitea.git
synced 2024-12-15 01:51:30 +08:00
50 lines
1.1 KiB
Go
50 lines
1.1 KiB
Go
|
// Copyright 2020 The Gitea Authors. All rights reserved.
|
||
|
// Use of this source code is governed by a MIT-style
|
||
|
// license that can be found in the LICENSE file.
|
||
|
|
||
|
package markdown
|
||
|
|
||
|
import (
|
||
|
"errors"
|
||
|
"strings"
|
||
|
|
||
|
"gopkg.in/yaml.v2"
|
||
|
)
|
||
|
|
||
|
func isYAMLSeparator(line string) bool {
|
||
|
line = strings.TrimSpace(line)
|
||
|
for i := 0; i < len(line); i++ {
|
||
|
if line[i] != '-' {
|
||
|
return false
|
||
|
}
|
||
|
}
|
||
|
return len(line) > 2
|
||
|
}
|
||
|
|
||
|
// ExtractMetadata consumes a markdown file, parses YAML frontmatter,
|
||
|
// and returns the frontmatter metadata separated from the markdown content
|
||
|
func ExtractMetadata(contents string, out interface{}) (string, error) {
|
||
|
var front, body []string
|
||
|
var seps int
|
||
|
lines := strings.Split(contents, "\n")
|
||
|
for idx, line := range lines {
|
||
|
if seps == 2 {
|
||
|
front, body = lines[:idx], lines[idx:]
|
||
|
break
|
||
|
}
|
||
|
if isYAMLSeparator(line) {
|
||
|
seps++
|
||
|
continue
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if len(front) == 0 && len(body) == 0 {
|
||
|
return "", errors.New("could not determine metadata")
|
||
|
}
|
||
|
|
||
|
if err := yaml.Unmarshal([]byte(strings.Join(front, "\n")), out); err != nil {
|
||
|
return "", err
|
||
|
}
|
||
|
return strings.Join(body, "\n"), nil
|
||
|
}
|