Ask GitHub when not found and save it to cache

cmd/meta.go

@@ -23,6 +23,9 @@ type meta struct {
 func (m *meta) init(args []string) error {
 	workDir := filepath.Join(os.Getenv("HOME"), ".gist")
 	cache := gist.NewCache(filepath.Join(workDir, "cache.json"))
+	// load cache
+	cache.Open()
+	m.cache = cache
 
 	user := os.Getenv("GIST_USER")
 	if user == "" {
@@ -32,15 +35,13 @@ func (m *meta) init(args []string) error {
 	if editor == "" {
 		editor = "vim"
 	}
-	token := os.Getenv("GITHUB_TOKEN")
-	if token == "" {
-		return errors.New("GITHUB_TOKEN is missing")
+
+	token, err := m.githubToken()
+	if err != nil {
+		return err
 	}
 	client := gist.NewClient(token)
 
-	// load cache
-	cache.Open()
-
 	var pages []gist.Page
 	switch len(cache.Pages) {
 	case 0:
@@ -73,7 +74,6 @@ func (m *meta) init(args []string) error {
 	defer s.Stop()
 	gist.Checkout()
 
-	m.cache = cache
 	m.gist = gist
 	m.files = gist.Files()
 	return nil
@@ -141,3 +141,28 @@ func (m *meta) prompt() (gist.File, error) {
 	i, _, err := prompt.Run()
 	return m.files[i], err
 }
+
+func (m *meta) githubToken() (string, error) {
+	var token string
+	token = os.Getenv("GITHUB_TOKEN")
+	if token != "" {
+		return token, nil
+	}
+	if m.cache == nil {
+		return "", errors.New("cache is nil")
+	}
+	token = m.cache.Token
+	if token != "" {
+		return token, nil
+	}
+	prompt := promptui.Prompt{
+		Label: "GITHUB_TOKEN",
+		Mask:  '*',
+	}
+	token, err := prompt.Run()
+	if err != nil {
+		return "", err
+	}
+	m.cache.Token = token
+	return token, nil
+}

pkg/gist/cache.go

@@ -6,13 +6,17 @@ import (
 )
 
 type Cache struct {
+	Token string `json:"token"`
 	Pages []Page `json:"pages"`
-
-	Path string `json:"-"`
+	Path  string `json:"-"`
 }
 
 func NewCache(path string) *Cache {
-	return &Cache{Path: path, Pages: []Page{}}
+	return &Cache{
+		Token: os.Getenv("GITHUB_TOKEN"),
+		Pages: []Page{},
+		Path:  path,
+	}
 }
 
 func (c *Cache) Open() error {

pkg/gist/gist.go

@@ -40,11 +40,11 @@ type Page struct {
 
 // File represents a single file hosted on gist
 type File struct {
-	Name     string
-	Content  string
-	FullPath string
+	Name     string `json:"name"`
+	Content  string `json:"content"`
+	FullPath string `json:"fullpath"`
 
-	Page
+	Page `json:"-"`
 }
 
 func (g Gist) Files() []File {