fix tree-sitter-cli dynamic library directory

Author: tpeacock19

langs

@@ -16,21 +16,37 @@
 (eval-when-compile
   (require 'subr-x))
 
-(defun tree-sitter-cli-directory ()
-  "Return tree-sitter CLI's directory, including the ending separator.
-This is the directory where the CLI tool keeps compiled lang definitions, among
-other data."
+(defun tree-sitter-cli-config-directory ()
+  "Return tree-sitter CLI's config directory, including the ending separator.
+This is the directory where the CLI stores the configuration file."
   (file-name-as-directory
    (expand-file-name
     ;; https://github.com/tree-sitter/tree-sitter/blob/1bad6dc/cli/src/config.rs#L20
     (if-let ((dir (getenv "TREE_SITTER_DIR")))
         dir
       "~/.tree-sitter"))))
 
-(defun tree-sitter-cli-bin-directory ()
+(defun tree-sitter-cli-cache-directory ()
+  "Return tree-sitter CLI's cache directory, including the ending separator.
+This is the directory where the CLI tool keeps compiled lang definitions."
+  (file-name-as-directory
+   ;; https://github.com/tree-sitter/tree-sitter/blob/master/cli/loader/src/lib.rs#L110-L115
+   (expand-file-name "tree-sitter"
+                     (cond
+                      ((eq system-type 'gnu/linux)
+                       (let ((env (getenv "XDG_CACHE_HOME")))
+                         (if (or (null env) (not (file-name-absolute-p env)))
+                             (expand-file-name "~/.cache")
+                           env)))
+                      ((eq system-type 'darwin)
+                       "~/Library/Caches")
+                      ((memq system-type '(cygwin windows-nt ms-dos))
+                       "~/AppData/Local")))))
+
+(defun tree-sitter-cli-lib-directory ()
   "Return the directory used by tree-sitter CLI to store compiled grammars."
   (file-name-as-directory
-   (concat (tree-sitter-cli-directory) "bin")))
+   (expand-file-name "lib" (tree-sitter-cli-cache-directory))))
 
 (provide 'tree-sitter-cli)
 ;;; tree-sitter-cli.el ends here

lisp/tree-sitter-cli.el

@@ -25,7 +25,7 @@
   "An alist of mappings from language name symbols to language objects.
 See `tree-sitter-require'.")
 
-(defvar tree-sitter-load-path (list (tree-sitter-cli-bin-directory))
+(defvar tree-sitter-load-path (list (tree-sitter-cli-lib-directory))
   "List of directories to search for shared libraries that define languages.")
 
 (defvar tree-sitter-load-suffixes