Introduce cycle privacy refactoring command

Author: rrudakov

CHANGELOG.md

@@ -13,6 +13,7 @@
 - [#88](https://github.com/clojure-emacs/clojure-ts-mode/pull/88): Introduce `clojure-ts-unwind` and `clojure-ts-unwind-all`.
 - [#89](https://github.com/clojure-emacs/clojure-ts-mode/pull/89): Introduce `clojure-ts-thread`, `clojure-ts-thread-first-all` and
   `clojure-ts-thread-last-all`.
+- Introduce `clojure-ts-cycle-privacy`.
 
 ## 0.3.0 (2025-04-15)
 

README.md

@@ -391,6 +391,10 @@ entire form. With a prefix argument do not thread the last form.
 `clojure-unwind-all`: Fully unwind a threaded expression removing the threading
 macro.
 
+`clojure-cycle-privacy`: Cycle privacy of `def`s or `defn`s. Use metadata
+explicitly with setting `clojure-use-metadata-for-privacy` to `t` for `defn`s
+too.
+
 ### Default keybindings
 
 | Keybinding                  | Command                       |
@@ -400,6 +404,7 @@ macro.
 | `C-c C-r u` / `C-c C-r C-u` | `clojure-ts-unwind`           |
 | `C-c C-r f` / `C-c C-r C-f` | `clojure-ts-thread-first-all` |
 | `C-c C-r l` / `C-c C-r C-l` | `clojure-ts-thread-last-all`  |
+| `C-c C-r p` / `C-c C-r C-p` | `clojure-ts-cycle-privacy`    |
 
 ### Customize refactoring commands prefix
 

clojure-ts-mode.el

@@ -160,6 +160,14 @@ current sexp."
   :safe #'booleanp
   :type 'boolean)
 
+(defcustom clojure-ts-use-metadata-for-privacy nil
+  "If nil, `clojure-ts-cycle-privacy' will use (defn- f []).
+
+If t, it will use (defn ^:private f [])."
+  :package-version '(clojure-ts-mode . "0.4.0")
+  :safe #'booleanp
+  :type 'boolean)
+
 (defcustom clojure-ts-align-reader-conditionals nil
   "Whether to align reader conditionals, as if they were maps."
   :package-version '(clojure-ts-mode . "0.4")
@@ -1480,6 +1488,13 @@ If JUSTIFY is non-nil, justify as well as fill the paragraph."
     "map_lit" "ns_map_lit" "vec_lit" "set_lit")
   "A regular expression that matches nodes that can be treated as lists.")
 
+(defun clojure-ts--defun-node-p (node)
+  "Return TRUE if NODE is a function or a var definition."
+  (and (clojure-ts--list-node-p node)
+       (let ((sym (clojure-ts--node-child-skip-metadata node 0)))
+         (string-match-p (rx bol (or "def" "defn" "defn-") eol)
+                         (clojure-ts--named-node-text sym)))))
+
 (defconst clojure-ts--markdown-inline-sexp-nodes
   '("inline_link" "full_reference_link" "collapsed_reference_link"
     "uri_autolink" "email_autolink" "shortcut_link" "image"
@@ -1490,7 +1505,8 @@ If JUSTIFY is non-nil, justify as well as fill the paragraph."
   `((clojure
      (sexp ,(regexp-opt clojure-ts--sexp-nodes))
      (list ,(regexp-opt clojure-ts--list-nodes))
-     (text ,(regexp-opt '("comment"))))
+     (text ,(regexp-opt '("comment")))
+     (defun ,#'clojure-ts--defun-node-p))
     (when clojure-ts-use-markdown-inline
       (markdown-inline
        (sexp ,(regexp-opt clojure-ts--markdown-inline-sexp-nodes))))))
@@ -1991,6 +2007,23 @@ value is `clojure-ts-thread-all-but-last'."
   (interactive "P")
   (clojure-ts--thread-all "->> " but-last))
 
+(defun clojure-ts-cycle-privacy ()
+  "Make a definition at point public or private."
+  (interactive)
+  (if-let* ((node-at-point (treesit-node-at (point) 'clojure t))
+            (defun-node (treesit-parent-until node-at-point 'defun t)))
+      (save-excursion
+        (goto-char (treesit-node-start defun-node))
+        (search-forward-regexp (rx "(def" (? "n") (? (group (or "-" " ^:private")))))
+        (if (match-string 1)
+            (replace-match "" nil nil nil 1)
+          (goto-char (match-end 0))
+          (insert (if (or clojure-ts-use-metadata-for-privacy
+                          (equal (match-string 0) "(def"))
+                      " ^:private"
+                    "-"))))
+    (user-error "No defun at point")))
+
 (defvar clojure-ts-refactor-map
   (let ((map (make-sparse-keymap)))
     (keymap-set map "C-t" #'clojure-ts-thread)
@@ -2001,6 +2034,8 @@ value is `clojure-ts-thread-all-but-last'."
     (keymap-set map "f" #'clojure-ts-thread-first-all)
     (keymap-set map "C-l" #'clojure-ts-thread-last-all)
     (keymap-set map "l" #'clojure-ts-thread-last-all)
+    (keymap-set map "C-p" #'clojure-ts-cycle-privacy)
+    (keymap-set map "p" #'clojure-ts-cycle-privacy)
     map)
   "Keymap for `clojure-ts-mode' refactoring commands.")
 
@@ -2012,6 +2047,7 @@ value is `clojure-ts-thread-all-but-last'."
     (easy-menu-define clojure-ts-mode-menu map "Clojure[TS] Mode Menu"
       '("Clojure"
         ["Align expression" clojure-ts-align]
+        ["Cycle privacy" clojure-ts-cycle-privacy]
         ("Refactor -> and ->>"
          ["Thread once more" clojure-ts-thread]
          ["Fully thread a form with ->" clojure-ts-thread-first-all]

test/clojure-ts-mode-cycling-test.el

@@ -0,0 +1,103 @@
+;;; clojure-ts-mode-cycling-test.el --- Clojure[TS] Mode: cycling things tests  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2025  Roman Rudakov
+
+;; Author: Roman Rudakov <[email protected]>
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; The code is adapted from `clojure-mode'.
+
+;;; Code:
+
+(require 'clojure-ts-mode)
+(require 'buttercup)
+(require 'test-helper "test/test-helper")
+
+(describe "clojure-ts-cycle-privacy"
+
+  (when-refactoring-it "should turn a public defn into a private defn"
+    "(defn add [a b]
+  (+ a b))"
+
+    "(defn- add [a b]
+  (+ a b))"
+
+    (clojure-ts-cycle-privacy))
+
+  (when-refactoring-it "should also work from the beginning of a sexp"
+     "(defn- add [a b]
+  (+ a b))"
+
+     "(defn add [a b]
+  (+ a b))"
+
+     (backward-sexp)
+     (clojure-ts-cycle-privacy))
+
+  (when-refactoring-it "should use metadata when clojure-use-metadata-for-privacy is set to true"
+    "(defn add [a b]
+  (+ a b))"
+
+    "(defn ^:private add [a b]
+  (+ a b))"
+
+    (let ((clojure-ts-use-metadata-for-privacy t))
+      (clojure-ts-cycle-privacy)))
+
+  (when-refactoring-it "should turn a private defn into a public defn"
+    "(defn- add [a b]
+  (+ a b))"
+
+    "(defn add [a b]
+  (+ a b))"
+
+    (clojure-ts-cycle-privacy))
+
+  (when-refactoring-it "should turn a private defn with metadata into a public defn"
+    "(defn ^:private add [a b]
+  (+ a b))"
+
+    "(defn add [a b]
+  (+ a b))"
+
+    (let ((clojure-ts-use-metadata-for-privacy t))
+      (clojure-ts-cycle-privacy)))
+
+  (when-refactoring-it "should also work with pre-existing metadata"
+    "(def ^:dynamic config
+  \"docs\"
+  {:env \"staging\"})"
+
+    "(def ^:private ^:dynamic config
+  \"docs\"
+  {:env \"staging\"})"
+
+    (clojure-ts-cycle-privacy))
+
+  (when-refactoring-it "should turn a private def with metadata into a public def"
+    "(def ^:private config
+  \"docs\"
+  {:env \"staging\"})"
+
+    "(def config
+  \"docs\"
+  {:env \"staging\"})"
+
+    (clojure-ts-cycle-privacy)))
+
+(provide 'clojure-ts-mode-cycling-test)
+;;; clojure-ts-mode-cycling-test.el ends here

test/samples/refactoring.clj

@@ -66,7 +66,15 @@
 
 (->> (map square (filter even? [1 2 3 4 5])))
 
+(-> (dissoc (assoc {} :key "value") :lock))
+
 (deftask dev []
          (comp (serve)
                (cljs (lala)
                      10)))
+
+(def my-name "Roma")
+
+(defn say-hello
+  []
+  (println "Hello" my-name))