Clean up the indentation config logic

* Converted the type of `clojure-indent-style` to symbol for consistency
with Emacs configuration practices.
* Removed some legacy code related to clojure-defun-style-default-indent.

4 files changed, 38 insertions, 27 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index cc07489..d9d21fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,10 @@
 * [#489](https://github.com/clojure-emacs/clojure-mode/issues/489): Inserting parens before comment form doesn't move point.
 * [#500](https://github.com/clojure-emacs/clojure-mode/pull/500): Fix project.el integration.
 
+### Changes
+
+* Change the accepted values of `clojure-indent-style` from keywords to symbols.
+
 ## 5.9.1 (2018-08-27)
 
 * [#485](https://github.com/clojure-emacs/clojure-mode/issues/485): Fix a regression in `end-f-defun`.
diff --git a/README.md b/README.md
index 867983f..a229119 100644
--- a/README.md
+++ b/README.md
@@ -112,7 +112,7 @@ want multi-line docstrings to be indented at all (which is pretty common in most
 The indentation of function forms is configured by the variable
 `clojure-indent-style`. It takes three possible values:
 
-- `:always-align` (the default)
+- `always-align` (the default)
 
 ```clj
 (some-function
@@ -124,7 +124,7 @@ The indentation of function forms is configured by the variable
                2)
 ```
 
-- `:always-indent`
+- `always-indent`
 
 ```clj
 (some-function
@@ -136,7 +136,7 @@ The indentation of function forms is configured by the variable
   2)
 ```
 
-- `:align-arguments`
+- `align-arguments`
 
 ```clj
 (some-function
@@ -148,6 +148,9 @@ The indentation of function forms is configured by the variable
                2)
 ```
 
+**Note:** Prior to clojure-mode 5.10 the configuration options for `clojure-indent-style` used to be
+keywords, but now they are symbols. Keywords will still be supported at least until clojure-mode 6.
+
 #### Indentation of macro forms
 
 The indentation of special forms and macros with bodies is controlled via
diff --git a/clojure-mode.el b/clojure-mode.el
index add3381..7940b80 100644
--- a/clojure-mode.el
+++ b/clojure-mode.el
@@ -10,7 +10,7 @@
 ;;       Artur Malabarba <bruce.connor.am@gmail.com>
 ;; URL: http://github.com/clojure-emacs/clojure-mode
 ;; Keywords: languages clojure clojurescript lisp
-;; Version: 5.10.0-snapshot
+;; Version: 5.10.0
 ;; Package-Requires: ((emacs "25.1"))
 
 ;; This file is not part of GNU Emacs.
@@ -94,7 +94,7 @@
   "Face used to font-lock Clojure character literals."
   :package-version '(clojure-mode . "3.0.0"))
 
-(defcustom clojure-indent-style :always-align
+(defcustom clojure-indent-style 'always-align
   "Indentation style to use for function forms and macro forms.
 There are two cases of interest configured by this variable.
 
@@ -112,7 +112,7 @@ already use special indentation rules.
 The possible values for this variable are keywords indicating how
 to indent function forms.
 
-    `:always-align' - Follow the same rules as `lisp-mode'.  All
+    `always-align' - Follow the same rules as `lisp-mode'.  All
     args are vertically aligned with the first arg in case (A),
     and vertically aligned with the function name in case (B).
     For instance:
@@ -122,30 +122,27 @@ to indent function forms.
          merge
          some-coll)
 
-    `:always-indent' - All args are indented like a macro body.
+    `always-indent' - All args are indented like a macro body.
         (reduce merge
           some-coll)
         (reduce
           merge
           some-coll)
 
-    `:align-arguments' - Case (A) is indented like `lisp', and
+    `align-arguments' - Case (A) is indented like `lisp', and
     case (B) is indented like a macro body.
         (reduce merge
                 some-coll)
         (reduce
           merge
           some-coll)"
-  :safe #'keywordp
-  :type '(choice (const :tag "Same as `lisp-mode'" :always-align)
-                 (const :tag "Indent like a macro body" :always-indent)
+  :safe #'symbolp
+  :type '(choice (const :tag "Same as `lisp-mode'" 'always-align)
+                 (const :tag "Indent like a macro body" 'always-indent)
                  (const :tag "Indent like a macro body unless first arg is on the same line"
-                        :align-arguments))
+                        'align-arguments))
   :package-version '(clojure-mode . "5.2.0"))
 
-(define-obsolete-variable-alias 'clojure-defun-style-default-indent
-  'clojure-indent-style "5.2.0")
-
 (defcustom clojure-use-backtracking-indent t
   "When non-nil, enable context sensitive indentation."
   :type 'boolean
@@ -1370,6 +1367,10 @@ spec."
     (let ((function (thing-at-point 'symbol)))
       (clojure--get-indent-method function))))
 
+(defun clojure--keyword-to-symbol (keyword)
+  "Convert KEYWORD to symbol."
+  (intern (substring (symbol-name keyword) 1)))
+
 (defun clojure--normal-indent (last-sexp indent-mode)
   "Return the normal indentation column for a sexp.
 Point should be after the open paren of the _enclosing_ sexp, and
@@ -1395,19 +1396,22 @@ accepted by `clojure-indent-style'."
       ;; Here we have reached the start of the enclosing sexp (point is now at
       ;; the function name), so the behaviour depends on INDENT-MODE and on
       ;; whether there's also an argument on this line (case A or B).
-      (let ((case-a ; The meaning of case-a is explained in `clojure-indent-style'.
+      (let ((indent-mode (if (keywordp indent-mode)
+                             ;; needed for backwards compatibility
+                             ;; as before clojure-mode 5.10 indent-mode was a keyword
+                             (clojure--keyword-to-symbol indent-mode)
+                           indent-mode))
+            (case-a ; The meaning of case-a is explained in `clojure-indent-style'.
              (and last-sexp-start
                   (< last-sexp-start (line-end-position)))))
         (cond
-         ;; For compatibility with the old `clojure-defun-style-default-indent', any
-         ;; value other than these 3 is equivalent to `always-body'.
-         ((not (memq indent-mode '(:always-align :align-arguments nil)))
+         ((eq indent-mode 'always-indent)
           (+ (current-column) lisp-body-indent -1))
          ;; There's an arg after the function name, so align with it.
          (case-a (goto-char last-sexp-start)
                  (current-column))
          ;; Not same line.
-         ((eq indent-mode :align-arguments)
+         ((eq indent-mode 'align-arguments)
           (+ (current-column) lisp-body-indent -1))
          ;; Finally, just align with the function name.
          (t (current-column)))))))
@@ -1479,7 +1483,7 @@ This function also returns nil meaning don't specify the indentation."
              (+ lisp-body-indent containing-form-column))
             ;; Further non-special args, align with the arg above.
             ((> pos (1+ method))
-             (clojure--normal-indent last-sexp :always-align))
+             (clojure--normal-indent last-sexp 'always-align))
             ;; Special arg. Rigidly indent with a large indentation.
             (t
              (+ (* 2 lisp-body-indent) containing-form-column)))))
@@ -1493,7 +1497,7 @@ This function also returns nil meaning don't specify the indentation."
            (cond
             ;; Preserve useful alignment of :require (and friends) in `ns' forms.
             ((and function (string-match "^:" function))
-             (clojure--normal-indent last-sexp :always-align))
+             (clojure--normal-indent last-sexp 'always-align))
             ;; This should be identical to the :defn above.
             ((and function
                   (string-match "\\`\\(?:\\S +/\\)?\\(def[a-z]*\\|with-\\)"
diff --git a/test/clojure-mode-indentation-test.el b/test/clojure-mode-indentation-test.el
index 51af55c..613e692 100644
--- a/test/clojure-mode-indentation-test.el
+++ b/test/clojure-mode-indentation-test.el
@@ -58,7 +58,7 @@ values of customisable variables."
   (let ((fname (intern (format "indentation/%s" description))))
     `(ert-deftest ,fname ()
        (let* ((after ,after)
-              (clojure-indent-style :always-align)
+              (clojure-indent-style 'always-align)
               (expected-cursor-pos (1+ (s-index-of "|" after)))
               (expected-state (delete ?| after))
               ,@var-bindings)
@@ -238,14 +238,14 @@ values of customisable variables."
   (declare (indent 1))
   (when (stringp style)
     (setq forms (cons style forms))
-    (setq style :always-align))
+    (setq style 'always-align))
   `(ert-deftest ,(intern (format "test-backtracking-%s" name)) ()
      (progn
        ,@(mapcar (lambda (form)
                    `(with-temp-buffer
                       (clojure-mode)
                       (insert "\n" ,(replace-regexp-in-string "\n +" "\n " form))
-                      (let ((clojure-indent-style ,style))
+                      (let ((clojure-indent-style (quote ,style)))
                         (indent-region (point-min) (point-max)))
                       (should (equal (buffer-string)
                                      ,(concat "\n" form)))))
@@ -463,7 +463,7 @@ x
 3))")
 
 (def-full-indent-test align-arguments
-  :align-arguments
+  'align-arguments
   "(some-function
   10
   1
@@ -473,7 +473,7 @@ x
                2)")
 
 (def-full-indent-test always-indent
-  :always-indent
+  'always-indent
   "(some-function
   10
   1