refactor(users/glittershark): Rename to grfn r/2485

Rename my //users directory and all places that refer to glittershark to
grfn, including nix references and documentation.

This may require some extra attention inside of gerrit's database after
it lands to allow me to actually push things.

Change-Id: I4728b7ec2c60024392c1c1fa6e0d4a59b3e266fa
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2933
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Reviewed-by: glittershark <grfn@gws.fyi>

1 files changed, 192 insertions, 0 deletions

diff --git a/users/grfn/emacs.d/splitjoin.el b/users/grfn/emacs.d/splitjoin.el
new file mode 100644
index 0000000000..dbc9704d79
--- /dev/null
+++ b/users/grfn/emacs.d/splitjoin.el
@@ -0,0 +1,192 @@
+;;; -*- lexical-binding: t; -*-
+
+(require 'dash)
+(load! "utils")
+
+;;;
+;;; Vars
+;;;
+
+(defvar +splitjoin/split-callbacks '()
+  "Alist mapping major mode symbol names to lists of split callbacks")
+
+(defvar +splitjoin/join-callbacks '()
+  "Alist mapping major mode symbol names to lists of join callbacks")
+
+
+
+;;;
+;;; Definition macros
+;;;
+
+(defmacro +splitjoin/defsplit (mode name &rest body)
+  `(setf
+    (alist-get ',name (alist-get ,mode +splitjoin/split-callbacks))
+    (λ! () ,@body)))
+
+(defmacro +splitjoin/defjoin (mode name &rest body)
+  `(setf
+    (alist-get ',name (alist-get ,mode +splitjoin/join-callbacks))
+    (λ! () ,@body)))
+
+;;;
+;;; Commands
+;;;
+
+(defun +splitjoin/split ()
+  (interactive)
+  (when-let (callbacks (->> +splitjoin/split-callbacks
+                            (alist-get major-mode)
+                            (-map #'cdr)))
+    (find-if #'funcall callbacks)))
+
+(defun +splitjoin/join ()
+  (interactive)
+  (when-let (callbacks (->> +splitjoin/join-callbacks
+                            (alist-get major-mode)
+                            (-map #'cdr)))
+    (find-if #'funcall callbacks)))
+
+
+;;;
+;;; Splits and joins
+;;; TODO: this should probably go in a file-per-language
+;;;
+
+(+splitjoin/defjoin
+ 'elixir-mode
+ join-do
+ (let* ((function-pattern (rx (and (zero-or-more whitespace)
+                                   "do"
+                                   (zero-or-more whitespace)
+                                   (optional (and "#" (zero-or-more anything)))
+                                   eol)))
+        (end-pattern (rx bol
+                         (zero-or-more whitespace)
+                         "end"
+                         (zero-or-more whitespace)
+                         eol))
+        (else-pattern (rx bol
+                         (zero-or-more whitespace)
+                         "else"
+                         (zero-or-more whitespace)
+                         eol))
+        (lineno     (line-number-at-pos))
+        (line       (thing-at-point 'line t)))
+   (when-let ((do-start-pos (string-match function-pattern line)))
+     (cond
+      ((string-match-p end-pattern (get-line (inc lineno)))
+       (modify-then-indent
+        (goto-line-char do-start-pos)
+        (insert ",")
+        (goto-char (line-end-position))
+        (insert ": nil")
+        (line-move 1)
+        (delete-line))
+       t)
+
+      ((string-match-p end-pattern (get-line (+ 2 lineno)))
+       (modify-then-indent
+        (goto-line-char do-start-pos)
+        (insert ",")
+        (goto-char (line-end-position))
+        (insert ":")
+        (join-line t)
+        (line-move 1)
+        (delete-line))
+       t)
+
+      ((and (string-match-p else-pattern (get-line (+ 2 lineno)))
+            (string-match-p end-pattern  (get-line (+ 4 lineno))))
+       (modify-then-indent
+        (goto-line-char do-start-pos)
+        (insert ",")
+        (goto-char (line-end-position))
+        (insert ":")
+        (join-line t)
+        (goto-eol)
+        (insert ",")
+        (join-line t)
+        (goto-eol)
+        (insert ":")
+        (join-line t)
+        (line-move 1)
+        (delete-line))
+       t)))))
+
+(comment
+ (string-match (rx (and bol
+                        "if "
+                        (one-or-more anything)
+                        ","
+                        (zero-or-more whitespace)
+                        "do:"
+                        (one-or-more anything)
+                        ","
+                        (zero-or-more whitespace)
+                        "else:"
+                        (one-or-more anything)))
+               "if 1, do: nil, else: nil")
+
+ )
+
+(+splitjoin/defsplit
+ 'elixir-mode
+ split-do-with-optional-else
+ (let* ((if-with-else-pattern (rx (and bol
+                                       (one-or-more anything)
+                                       ","
+                                       (zero-or-more whitespace)
+                                       "do:"
+                                       (one-or-more anything)
+                                       (optional
+                                        ","
+                                        (zero-or-more whitespace)
+                                        "else:"
+                                        (one-or-more anything)))))
+        (current-line (get-line)))
+   (when (string-match if-with-else-pattern current-line)
+     (modify-then-indent
+      (assert (goto-regex-on-line ",[[:space:]]*do:"))
+      (delete-char 1)
+      (assert (goto-regex-on-line ":"))
+      (delete-char 1)
+      (insert "\n")
+      (when (goto-regex-on-line-r ",[[:space:]]*else:")
+        (delete-char 1)
+        (insert "\n")
+        (assert (goto-regex-on-line ":"))
+        (delete-char 1)
+        (insert "\n"))
+      (goto-eol)
+      (insert "\nend"))
+     t)))
+
+(comment
+ (+splitjoin/defsplit 'elixir-mode split-def
+ (let ((function-pattern (rx (and ","
+                                  (zero-or-more whitespace)
+                                  "do:")))
+       (line (thing-at-point 'line t)))
+   (when-let (idx (string-match function-pattern line))
+     (let ((beg (line-beginning-position))
+           (orig-line-char (- (point) (line-beginning-position))))
+       (save-mark-and-excursion
+        (goto-line-char idx)
+        (delete-char 1)
+        (goto-line-char (string-match ":" (thing-at-point 'line t)))
+        (delete-char 1)
+        (insert "\n")
+        (goto-eol)
+        (insert "\n")
+        (insert "end")
+        (evil-indent beg (+ (line-end-position) 1))))
+     (goto-line-char orig-line-char)
+     t))))
+
+(+splitjoin/defjoin
+ 'elixir-mode
+ join-if-with-else
+ (let* ((current-line (thing-at-point 'line)))))
+
+(provide 'splitjoin)