mirror of https://github.com/coder/coder.git
228 lines
5.1 KiB
Go
228 lines
5.1 KiB
Go
package main
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import (
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"bytes"
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"encoding/json"
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"errors"
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"flag"
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"fmt"
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"go/parser"
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"go/token"
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"io"
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"io/fs"
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"os"
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"path"
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"path/filepath"
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"strings"
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"github.com/gohugoio/hugo/parser/pageparser"
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"golang.org/x/xerrors"
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"github.com/coder/coder/v2/codersdk"
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)
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const (
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examplesDir = "examples"
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examplesSrc = "examples.go"
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)
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func main() {
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lint := flag.Bool("lint", false, "Lint **all** the examples instead of generating the examples.gen.json file")
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flag.Parse()
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if err := run(*lint); err != nil {
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_, _ = fmt.Fprintf(os.Stderr, "error: %+v\n", err)
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os.Exit(1)
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}
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}
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//nolint:revive // This is a script, not a library.
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func run(lint bool) error {
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fset := token.NewFileSet()
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src, err := parser.ParseFile(fset, filepath.Join(examplesDir, examplesSrc), nil, parser.ParseComments)
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if err != nil {
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return err
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}
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projectFS := os.DirFS(".")
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examplesFS := os.DirFS(examplesDir)
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var paths []string
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if lint {
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files, err := fs.ReadDir(examplesFS, "templates")
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if err != nil {
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return err
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}
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for _, f := range files {
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if !f.IsDir() {
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continue
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}
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paths = append(paths, filepath.Join("templates", f.Name()))
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}
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} else {
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for _, comment := range src.Comments {
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for _, line := range comment.List {
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if s, ok := parseEmbedTag(line.Text); ok && !strings.HasSuffix(s, ".json") {
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paths = append(paths, s)
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}
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}
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}
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}
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var examples []codersdk.TemplateExample
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var errs []error
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for _, name := range paths {
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te, err := parseTemplateExample(projectFS, examplesFS, name)
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if err != nil {
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errs = append(errs, err)
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continue
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}
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if te != nil {
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examples = append(examples, *te)
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}
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}
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if len(errs) > 0 {
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return xerrors.Errorf("parse failed: %w", errors.Join(errs...))
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}
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var w io.Writer = os.Stdout
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if lint {
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w = io.Discard
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}
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_, err = fmt.Fprint(w, "// Code generated by examplegen. DO NOT EDIT.\n")
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if err != nil {
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return err
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}
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enc := json.NewEncoder(w)
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enc.SetIndent("", " ")
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return enc.Encode(examples)
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}
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func parseTemplateExample(projectFS, examplesFS fs.FS, name string) (te *codersdk.TemplateExample, err error) {
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var errs []error
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defer func() {
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if err != nil {
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errs = append([]error{err}, errs...)
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}
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if len(errs) > 0 {
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err = xerrors.Errorf("example %q has errors", name)
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for _, e := range errs {
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err = errors.Join(err, e)
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}
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}
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}()
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dir, err := fs.Stat(examplesFS, name)
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if err != nil {
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return nil, err
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}
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if !dir.IsDir() {
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//nolint:nilnil // This is a script, not a library.
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return nil, nil
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}
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exampleID := dir.Name()
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// Each one of these is a example!
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readme, err := fs.ReadFile(examplesFS, path.Join(name, "README.md"))
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if err != nil {
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return nil, xerrors.New("missing README.md")
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}
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frontMatter, err := pageparser.ParseFrontMatterAndContent(bytes.NewReader(readme))
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if err != nil {
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return nil, xerrors.Errorf("parse front matter: %w", err)
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}
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// Make sure validation here is in sync with requirements for
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// coder/registry.
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displayName, err := getString(frontMatter.FrontMatter, "display_name")
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if err != nil {
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errs = append(errs, err)
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}
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description, err := getString(frontMatter.FrontMatter, "description")
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if err != nil {
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errs = append(errs, err)
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}
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_, err = getString(frontMatter.FrontMatter, "maintainer_github")
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if err != nil {
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errs = append(errs, err)
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}
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tags := []string{}
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tagsRaw, exists := frontMatter.FrontMatter["tags"]
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if exists {
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tagsI, valid := tagsRaw.([]interface{})
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if !valid {
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errs = append(errs, xerrors.Errorf("tags isn't a slice: type %T", tagsRaw))
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} else {
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for _, tagI := range tagsI {
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tag, valid := tagI.(string)
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if !valid {
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errs = append(errs, xerrors.Errorf("tag isn't a string: type %T", tagI))
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continue
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}
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tags = append(tags, tag)
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}
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}
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}
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var icon string
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icon, err = getString(frontMatter.FrontMatter, "icon")
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if err != nil {
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errs = append(errs, err)
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} else {
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cleanPath := filepath.Clean(filepath.Join(examplesDir, name, icon))
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_, err := fs.Stat(projectFS, cleanPath)
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if err != nil {
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errs = append(errs, xerrors.Errorf("icon does not exist: %w", err))
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}
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if !strings.HasPrefix(cleanPath, filepath.Join("site", "static")) {
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errs = append(errs, xerrors.Errorf("icon is not in site/static/: %q", icon))
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}
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icon, err = filepath.Rel(filepath.Join("site", "static"), cleanPath)
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if err != nil {
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errs = append(errs, xerrors.Errorf("cannot make icon relative to site/static: %w", err))
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}
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}
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if len(errs) > 0 {
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return nil, xerrors.New("front matter validation failed")
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}
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return &codersdk.TemplateExample{
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ID: exampleID,
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Name: displayName,
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Description: description,
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Icon: "/" + icon, // The FE needs a static path!
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Tags: tags,
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Markdown: string(frontMatter.Content),
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// URL is set by examples/examples.go.
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}, nil
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}
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func getString(m map[string]any, key string) (string, error) {
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v, ok := m[key]
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if !ok {
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return "", xerrors.Errorf("front matter does not contain %q", key)
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}
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vv, ok := v.(string)
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if !ok {
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return "", xerrors.Errorf("%q isn't a string", key)
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}
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return vv, nil
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}
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func parseEmbedTag(s string) (string, bool) {
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if !strings.HasPrefix(s, "//go:embed") {
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return "", false
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}
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return strings.TrimSpace(strings.TrimPrefix(s, "//go:embed")), true
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}
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