/
markdown.go
203 lines (159 loc) · 4.02 KB
/
markdown.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package encoder
import (
"bytes"
"fmt"
"os"
"path/filepath"
"regexp"
"strings"
"text/template"
yaml "gopkg.in/yaml.v3"
)
var markdownTemplate = `
{{ define "fieldExamples" }}
Examples:
{{ range $example := .Examples }}
{{ yaml $example.GetValue $.Name }}
{{ end }}
{{ end }}
{{ .Description }}
{{- $anchors := .Anchors -}}
{{- $tick := "` + "`" + `" -}}
{{ range $struct := .Structs }}
## {{ $struct.Type }}
{{ if $struct.Description -}}
{{ $struct.Description }}
{{ end }}
{{ if $struct.AppearsIn -}}
Appears in:
{{ range $appearance := $struct.AppearsIn -}}
- <code>{{ encodeType $appearance.TypeName }}.{{ $appearance.FieldName }}</code>
{{ end -}}
{{ end }}
{{ if $struct.Examples -}}
{{ range $example := $struct.Examples }}
{{ yaml $example.GetValue "" }}
{{- end -}}
{{ end }}
{{ if $struct.Fields -}}
<hr />
{{ range $field := $struct.Fields }}{{ if $field.Name -}}
<div class="dd">
<code>{{ $field.Name }}</code> <i>{{ encodeType $field.Type }}</i>
</div>
<div class="dt">
{{ $field.Description }}
{{ if $field.Values }}
Valid values:
{{ range $value := $field.Values }}
- <code>{{ $value }}</code>
{{ end -}}
{{ end -}}
{{- if $field.Note }}
> {{ $field.Note }}
{{ end -}}
{{- if $field.Examples }}
{{ template "fieldExamples" $field }}
{{ end -}}
</div>
<hr />
{{ end }}{{ end }}{{ end }}
{{ if $struct.Values -}}
{{ $struct.Type }} Valid Values:
{{ range $value := $struct.Values -}}
- {{ $tick }}{{ $value }}{{ $tick }}
{{ end -}}
{{- end }}
{{ end }}`
// FileDoc represents a single go file documentation.
type FileDoc struct {
// Name will be used in md file name pattern.
Name string
// Description file description, supports markdown.
Description string
// Structs structs defined in the file.
Structs []*Doc
Anchors map[string]string
t *template.Template
}
// Encode encodes file documentation as MD file.
func (fd *FileDoc) Encode() ([]byte, error) {
anchors := map[string]string{}
for _, t := range fd.Structs {
anchors[t.Type] = strings.ToLower(t.Type)
}
fd.Anchors = anchors
fd.t = template.Must(template.New("file_markdown.tpl").
Funcs(template.FuncMap{
"yaml": encodeYaml,
"encodeType": fd.encodeType,
}).
Parse(markdownTemplate))
buf := bytes.Buffer{}
if err := fd.t.Execute(&buf, fd); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
// Write dumps documentation string to folder.
func (fd *FileDoc) Write(path, frontmatter string) error {
data, err := fd.Encode()
if err != nil {
return err
}
if stat, e := os.Stat(path); !os.IsNotExist(e) {
if !stat.IsDir() {
return fmt.Errorf("destination path should be a directory")
}
} else {
if e := os.MkdirAll(path, 0o777); e != nil {
return e
}
}
f, err := os.Create(filepath.Join(path, fmt.Sprintf("%s.%s", strings.ToLower(fd.Name), "md")))
if err != nil {
return err
}
if _, err := f.Write([]byte(frontmatter)); err != nil {
return err
}
if _, err := f.Write(data); err != nil {
return err
}
return nil
}
func (fd *FileDoc) encodeType(t string) string {
re := regexp.MustCompile(`\w+`)
for _, s := range re.FindAllString(t, -1) {
if anchor, ok := fd.Anchors[s]; ok {
t = strings.ReplaceAll(t, s, formatLink(s, "#"+anchor))
}
}
return t
}
func encodeYaml(in interface{}, name string) string {
if name != "" {
in = map[string]interface{}{
name: in,
}
}
node, err := toYamlNode(in, newOptions(WithComments(CommentsAll)))
if err != nil {
return fmt.Sprintf("yaml encoding failed %s", err)
}
data, err := yaml.Marshal(node)
if err != nil {
return fmt.Sprintf("yaml encoding failed %s", err)
}
lines := strings.Split(string(data), "\n")
for i, line := range lines {
lines[i] = strings.TrimRight(line, " ")
}
return fmt.Sprintf("``` yaml\n%s```", strings.Join(lines, "\n"))
}
func formatLink(text, link string) string {
return fmt.Sprintf(`<a href="%s">%s</a>`, link, text)
}