Add support for asset directories

pkg/gitea/gitea.go

@@ -22,6 +22,51 @@ type Client struct {
 	gc                 *gclient.Client
 }
 
+type dirEntry struct {
+	name    string
+	isDir   bool
+	content []byte
+}
+
+func (d *dirEntry) Name() string               { return d.name }
+func (d *dirEntry) IsDir() bool                { return d.isDir }
+func (d *dirEntry) Type() fs.FileMode          { return fs.ModePerm }
+func (d *dirEntry) Info() (fs.FileInfo, error) { return nil, fs.ErrNotExist }
+
+type openDir struct {
+	entries []fs.DirEntry
+	name    string
+	pos     int
+}
+
+func (d *openDir) Read([]byte) (int, error) {
+	return 0, fmt.Errorf("cannot Read() a directory")
+}
+
+func (d *openDir) Close() error {
+	return nil
+}
+
+func (d *openDir) Stat() (fs.FileInfo, error) {
+	return nil, fs.ErrNotExist
+}
+
+func (d *openDir) ReadDir(count int) ([]fs.DirEntry, error) {
+	n := len(d.entries) - d.pos
+	if count > 0 && n > count {
+		n = count
+	}
+	if n == 0 {
+		if count <= 0 {
+			return nil, nil
+		}
+		return nil, io.EOF
+	}
+	entries := d.entries[d.pos : d.pos+n]
+	d.pos += n
+	return entries, nil
+}
+
 func NewClient(serverURL, token, giteapages, giteapagesAllowAll string) (*Client, error) {
 	if giteapages == "" {
 		giteapages = "gitea-pages"
@@ -53,10 +98,6 @@ func (c *Client) Open(name, ref string) (fs.File, error) {
 		filepath = "index.html"
 	}
 
-	if filepath == "" {
-		filepath = "index.html"
-	}
-
 	isFluffyPagesRepo := strings.HasSuffix(repo, ".fluffy.pw")
 
 	limited, allowall := c.allowsPages(owner, repo)
@@ -65,12 +106,10 @@ func (c *Client) Open(name, ref string) (fs.File, error) {
 	}
 
 	hasConfig := true
-
 	if err := c.readConfig(owner, repo); err != nil {
 		if !isFluffyPagesRepo && !allowall {
 			return nil, err
 		}
-
 		hasConfig = false
 	}
 
@@ -78,6 +117,14 @@ func (c *Client) Open(name, ref string) (fs.File, error) {
 		return nil, fs.ErrNotExist
 	}
 
+	entries, err := c.getDirectoryContents(owner, repo, filepath, ref)
+	if err == nil {
+		return &openDir{
+			entries: entries,
+			name:    filepath,
+		}, nil
+	}
+
 	res, err := c.getRawFileOrLFS(owner, repo, filepath, ref)
 	if err != nil {
 		return nil, err
@@ -250,3 +297,20 @@ func validRefs(ref string, allowall bool) bool {
 
 	return false
 }
+
+func (c *Client) getDirectoryContents(owner, repo, dirPath, ref string) ([]fs.DirEntry, error) {
+	entries, _, err := c.gc.ListContents(owner, repo, ref, dirPath)
+	if err != nil {
+		return nil, fs.ErrNotExist
+	}
+
+	var result []fs.DirEntry
+	for _, entry := range entries {
+		result = append(result, &dirEntry{
+			name:  entry.Name,
+			isDir: entry.Type == "dir",
+		})
+	}
+
+	return result, nil
+}