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emacs: Factorize code for buffer names.

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* emacs/guix-ui.el (guix-ui-buffer-name-default): Extract the code to
  compose buffer name and move to...
* emacs/guix-utils.el (guix-compose-buffer-name): ... here.  New procedure.
This commit is contained in:
Alex Kost 2016-04-02 21:07:09 +03:00
parent de946028be
commit 6ea80938ae
2 changed files with 30 additions and 20 deletions
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22
emacs/guix-ui.el
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@ -1,6 +1,6 @@
;;; guix-ui.el --- Common code for Guix package management interface -*- lexical-binding: t -*- ;;; guix-ui.el --- Common code for Guix package management interface -*- lexical-binding: t -*-
;; Copyright © 2014, 2015 Alex Kost <alezost@gmail.com> ;; Copyright © 2014, 2015, 2016 Alex Kost <alezost@gmail.com>
;; This file is part of GNU Guix. ;; This file is part of GNU Guix.
@ -117,26 +117,10 @@ The function is called with 2 arguments: BASE-NAME and PROFILE."
"Return BASE-NAME." "Return BASE-NAME."
base-name) base-name)
;; TODO separate '*...*' logic from the real profile appending. Also add
;; another function to return '*Guix ...: /full/path/to/profile*' name.
(defun guix-ui-buffer-name-default (base-name profile) (defun guix-ui-buffer-name-default (base-name profile)
"Return buffer name by appending BASE-NAME and PROFILE's base file name." "Return buffer name by appending BASE-NAME and PROFILE's base file name."
(let ((profile-name (file-name-base (directory-file-name profile))) (guix-compose-buffer-name base-name
(re (rx string-start (file-name-base (directory-file-name profile))))
(group (? "*"))
(group (*? any))
(group (? "*"))
string-end)))
(or (string-match re base-name)
(error "Unexpected error in defining guix buffer name"))
(let ((first* (match-string 1 base-name))
(name-body (match-string 2 base-name))
(last* (match-string 3 base-name)))
;; Handle the case when buffer name is wrapped by '*'.
(if (and (string= "*" first*)
(string= "*" last*))
(concat "*" name-body ": " profile-name "*")
(concat base-name ": " profile-name)))))
(defun guix-ui-buffer-name (base-name profile) (defun guix-ui-buffer-name (base-name profile)
"Return Guix buffer name based on BASE-NAME and profile. "Return Guix buffer name based on BASE-NAME and profile.

28
emacs/guix-utils.el
View file

@ -1,6 +1,6 @@
;;; guix-utils.el --- General utility functions -*- lexical-binding: t -*- ;;; guix-utils.el --- General utility functions -*- lexical-binding: t -*-
;; Copyright © 2014, 2015 Alex Kost <alezost@gmail.com> ;; Copyright © 2014, 2015, 2016 Alex Kost <alezost@gmail.com>
;; This file is part of GNU Guix. ;; This file is part of GNU Guix.
@ -223,6 +223,32 @@ If NO-MESSAGE? is non-nil, do not display a message about it."
See also `guix-copy-as-kill'." See also `guix-copy-as-kill'."
(guix-copy-as-kill (guix-command-string args) no-message?)) (guix-copy-as-kill (guix-command-string args) no-message?))
(defun guix-compose-buffer-name (base-name postfix)
"Return buffer name by appending BASE-NAME and POSTFIX.
In a simple case the result is:
BASE-NAME: POSTFIX
If BASE-NAME is wrapped by '*', then the result is:
*BASE-NAME: POSTFIX*"
(let ((re (rx string-start
(group (? "*"))
(group (*? any))
(group (? "*"))
string-end)))
(or (string-match re base-name)
(error "Unexpected error in defining buffer name"))
(let ((first* (match-string 1 base-name))
(name-body (match-string 2 base-name))
(last* (match-string 3 base-name)))
;; Handle the case when buffer name is wrapped by '*'.
(if (and (string= "*" first*)
(string= "*" last*))
(concat "*" name-body ": " postfix "*")
(concat base-name ": " postfix)))))
(defun guix-completing-read (prompt table &optional predicate (defun guix-completing-read (prompt table &optional predicate
require-match initial-input require-match initial-input
hist def inherit-input-method) hist def inherit-input-method)