Add columnify-file

1 files changed, 25 insertions, 0 deletions

diff --git a/lisp/init-text.el b/lisp/init-text.el
index c733927..ecd4831 100644
--- a/lisp/init-text.el
+++ b/lisp/init-text.el
@@ -31,4 +31,29 @@ is non-nil, the region is copied with `x-select-text'."
     (when arg
       (x-select-text (buffer-substring-no-properties (point-min) (point-max))))))
 
+(defun km/columnify-file (delim)
+  "Separate current file on DELIM using column program.
+
+By default, DELIM is set to \",\". With a single prefix argument,
+use whitespace as the delimiter. With two prefix arguments,
+prompt for a delimiter.
+
+If a columnified buffer already exists, just switch to it."
+  (interactive (list (cond ((not current-prefix-arg) ",")
+                           ((> (prefix-numeric-value current-prefix-arg) 4)
+                            (read-string "Delimiter: "))
+                           (t nil))))
+  (let* ((bufname (buffer-name))
+         (output-buffer-name (concat "*cols: " bufname "*"))
+         (output-buffer (get-buffer output-buffer-name))
+         (fname (file-relative-name buffer-file-name))
+         (col-args '("-t")))
+    (unless output-buffer
+      (setq output-buffer (get-buffer-create output-buffer-name))
+      (when delim
+        (add-to-list 'col-args (format "-s'%s'" delim)))
+      (apply 'call-process "column" fname output-buffer nil
+             col-args))
+    (switch-to-buffer output-buffer)))
+
 (provide 'init-text)