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vite.go
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vite.go
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package vite
import (
"crypto/md5"
"encoding/json"
"fmt"
"io"
"io/fs"
"log"
"os"
"strings"
)
type Manifest struct {
entries map[string]Entry
url string
publicPath string
manifestDirectory string
manifestPath string
hotProxyURL string
}
type Entry struct {
File string `json:"file"`
// Src string `json:"src"`
Assets []string `json:"assets"`
CSS []string `json:"css"`
IsEntry bool `json:"isEntry"`
}
// New function.
func New(url, publicPath, manifestDirectory, hotProxyURL string) (*Manifest, error) {
entries := make(map[string]Entry)
m := &Manifest{
url: url,
publicPath: publicPath,
hotProxyURL: hotProxyURL,
entries: entries,
}
m.manifestDirectory = m.pathPrefix(manifestDirectory)
m.manifestPath = m.getManifestPath(m.publicPath + m.manifestDirectory)
content, err := os.ReadFile(m.manifestPath)
if err != nil {
return nil, err
}
err = json.Unmarshal(content, &m.entries)
if err != nil {
return nil, err
}
return m, nil
}
// func (m *Manifest) manifestPath(manifestDirectory string) string {
// return manifestDirectory + "/manifest.json"
// }
func (m *Manifest) pathPrefix(path string) string {
if path != "" && !strings.HasPrefix(path, "/") {
path = "/" + path
}
return path
}
// Hash function.
func (m *Manifest) Hash(manifestDirectory string) (string, error) {
// manifestPath := m.manifestPath
_, err := os.Stat(m.manifestPath)
if os.IsNotExist(err) {
return "", ErrManifestNotExist
}
file, err := os.Open(m.manifestPath)
if err != nil {
return "", err
}
defer file.Close()
log.Println("mix file")
log.Println(m.hashFromFile(file))
return m.hashFromFile(file)
}
// HashFromFS function.
func (m *Manifest) HashFromFS(manifestDirectory string, staticFS fs.FS) (string, error) {
file, err := staticFS.Open(m.getManifestPath(manifestDirectory))
// file, err := staticFS.Open(strings.TrimPrefix(m.manifestPath, "/"))
if err != nil {
return "", err
}
defer file.Close()
return m.hashFromFile(file)
}
func (m *Manifest) hashFromFile(file io.Reader) (string, error) {
hash := md5.New()
if _, err := io.Copy(hash, file); err != nil {
return "", err
}
return fmt.Sprintf("%x", hash.Sum(nil)), nil
}
func (m *Manifest) LoadViteEmbed(entry string) (string, error) {
info, err := os.Stat(m.publicPath + "/hot")
log.Printf("error %v info %v", err, info)
if err == nil {
if m.hotProxyURL != "" {
return m.hotProxyURL + entry, nil
}
content, err := os.ReadFile(m.publicPath + "/hot")
if err != nil {
return "", err
}
log.Printf("hot-content %v", content)
url := strings.TrimSpace(string(content))
if strings.HasPrefix(url, "http://") || strings.HasPrefix(url, "https://") {
url = url[strings.Index(url, ":")+1:]
} else {
url = "//localhost:8080"
}
return m.GetScript(url + m.pathPrefix(entry)), nil
}
if _, ok := m.entries[entry]; !ok {
log.Printf("vite: unable to locate vite file: %v", entry)
return "", fmt.Errorf("vite: unable to locate vite file: %v", entry)
}
return m.GetScript(m.buildPath(m.entries[entry].File)) + m.jsPreloadImports(entry) + m.GetStyles(entry), nil
}
func (m *Manifest) GetAsset(path string) string {
return fmt.Sprintf(`<script type="module" src="%s"></script>`, m.buildPath(m.entries[path].File))
}
func (m *Manifest) GetScript(path string) string {
return fmt.Sprintf(`<script type="module" src="%s"></script>`, path)
}
func (m *Manifest) jsPreloadImports(name string) string {
return ""
}
func (m *Manifest) GetJS(name string) string {
return m.buildPath(m.entries[name].File)
}
func (m *Manifest) GetStyles(name string) string {
entry := m.entries[name]
var links string
for _, css := range entry.CSS {
links += fmt.Sprintf(`<link rel="stylesheet" href="%s">`, m.buildPath(css))
}
return links
}
func (m *Manifest) getManifestPath(path string) string {
return path + "/manifest.json"
}
func (m *Manifest) buildPath(path string) string {
return m.url + m.manifestDirectory + m.pathPrefix(path)
}