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|
package main
import (
"bytes"
"io/fs"
"net/url"
"os"
"path/filepath"
"strings"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/extension"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/text"
)
var md = goldmark.New(
goldmark.WithExtensions(extension.TaskList),
)
type Doc struct {
path string
content []byte
links Set[string]
backlinks Set[string]
}
func (doc *Doc) UpdateLinks(source, target string) {
dirname := filepath.Dir(doc.path)
relpath, err := filepath.Rel(dirname, target)
if err != nil {
return
}
for link := range doc.links {
if filepath.Join(dirname, link) != source {
continue
}
doc.content = bytes.Replace(doc.content, []byte(link), []byte(relpath), -1)
// TODO: Update doc.links
}
doc.Overwrite()
}
func (doc *Doc) Overwrite() {
os.WriteFile(doc.path, doc.content, 0644)
}
func NewDoc(filename string) *Doc {
// NOTE: so far, only markdown is supported
if !strings.HasSuffix(filename, ".md") {
return nil
}
content, err := os.ReadFile(filename)
if err != nil {
return nil
}
root := md.Parser().Parse(
text.NewReader(content),
parser.WithContext(parser.NewContext()),
)
links := Set[string]{}
err = ast.Walk(root, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
if entering {
switch link := n.(type) {
case *ast.Link:
href, err := url.PathUnescape(string(link.Destination))
if err != nil {
return ast.WalkStop, err
}
links.Insert(href)
}
}
return ast.WalkContinue, nil
})
if err != nil {
return nil
}
return &Doc{
path: filename,
content: content,
links: links,
backlinks: Set[string]{},
}
}
type Docs Map[string, *Doc]
func (docs Docs) GetOrNew(filename string) *Doc {
if doc, ok := docs[filename]; ok {
return doc
}
doc := NewDoc(filename)
docs[filename] = doc
return doc
}
func NewDocs(dirname string) Docs {
docs := Docs{}
dirname, err := filepath.Abs(dirname)
if err != nil {
return nil
}
if err := filepath.Walk(dirname, func(path string, info fs.FileInfo, err error) error {
if err != nil {
return err
}
// TODO: Add skip dir config
if info.IsDir() && (info.Name() == ".git" || info.Name() == "vendor") {
return filepath.SkipDir
}
if doc := NewDoc(path); doc != nil {
docs[path] = doc
}
return nil
}); err != nil {
return nil
}
for filename, doc := range docs {
for link := range doc.links {
abslink := filepath.Join(filepath.Dir(filename), link)
if _, ok := docs[abslink]; !ok {
continue
}
docs[abslink].backlinks.Insert(filename)
}
}
return docs
}
func (docs Docs) Contain(filename string) bool {
_, ok := docs[filename]
return ok
}
var DocCollection Docs
|
