05/23: emacs: Add utils to make symbol and string for guix command.

[Alex Kost]

alezost pushed a commit to branch master
in repository guix.

commit 009d6388e6ba83d903c9e3756daa71251ca1b8e6
Author: Alex Kost <address@hidden>
Date:   Sun Aug 16 11:09:39 2015 +0300

    emacs: Add utils to make symbol and string for guix command.
    
    * emacs/guix-utils.el (guix-shell-quote-argument, guix-command-symbol,
      guix-command-string): New functions.
---
 emacs/guix-utils.el |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/emacs/guix-utils.el b/emacs/guix-utils.el
index df6636c..68cad88 100644
--- a/emacs/guix-utils.el
+++ b/emacs/guix-utils.el
@@ -144,6 +144,25 @@ add both to the end and to the beginning."
           (t
            (concat separator str separator)))))
 
+(defun guix-shell-quote-argument (argument)
+  "Quote shell command ARGUMENT.
+This function is similar to `shell-quote-argument', but less strict."
+  (if (equal argument "")
+      "''"
+    (replace-regexp-in-string
+     "\n" "'\n'"
+     (replace-regexp-in-string
+      (rx (not (any alnum "-=,./\n"))) "\\\\\\&" argument))))
+
+(defun guix-command-symbol (&optional args)
+  "Return symbol by concatenating 'guix' and ARGS (strings)."
+  (intern (guix-concat-strings (cons "guix" args) "-")))
+
+(defun guix-command-string (&optional args)
+  "Return 'guix ARGS ...' string with quoted shell arguments."
+  (let ((args (mapcar #'guix-shell-quote-argument args)))
+    (guix-concat-strings (cons "guix" args) " ")))
+
 (defun guix-completing-read-multiple (prompt table &optional predicate
                                       require-match initial-input
                                       hist def inherit-input-method)