;;; env.el --- functions to manipulate environment variables
-;; Copyright (C) 1991, 1994, 2000, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 1991, 1994, 2000, 2001, 2003 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: processes, unix
;; program options. This package permits you to set environment variables
;; to be passed to any sub-process run under Emacs.
+;; Note that the environment string `process-environment' is not
+;; decoded, but the args of `setenv' and `getenv' are normally
+;; multibyte text and get coding conversion.
+
;;; Code:
;; History list for environment variable names.
Optional second arg MUSTMATCH, if non-nil, means require existing envvar name.
If it is also not t, RET does not exit if it does non-null completion."
(completing-read prompt
- (mapcar (function
- (lambda (enventry)
- (list (substring enventry 0
- (string-match "=" enventry)))))
+ (mapcar (lambda (enventry)
+ (list (if enable-multibyte-characters
+ (decode-coding-string
+ (substring enventry 0
+ (string-match "=" enventry))
+ locale-coding-system t)
+ (substring enventry 0
+ (string-match "=" enventry)))))
process-environment)
nil mustmatch nil 'read-envvar-name-history))
`$FOO' where FOO is an environment variable name means to substitute
the value of that variable. The variable name should be terminated
with a character not a letter, digit or underscore; otherwise, enclose
-the entire variable name in braces. Use `$$' to insert a single
-dollar sign."
+the entire variable name in braces. For instance, in `ab$cd-x',
+`$cd' is treated as an environment variable.
+
+Use `$$' to insert a single dollar sign."
(let ((start 0))
- (while (string-match
- (rx '(or (and "$" (submatch (1+ (in "a-zA-Z0-9_"))))
- (and "${" (submatch (minimal-match (0+ anything))) "}")
- "$$"))
+ (while (string-match
+ (eval-when-compile
+ (rx (or (and "$" (submatch (1+ (regexp "[[:alnum:]_]"))))
+ (and "${" (submatch (minimal-match (0+ anything))) "}")
+ "$$")))
string start)
(cond ((match-beginning 1)
(let ((value (getenv (match-string 1 string))))
start (+ (match-beginning 0) 1)))))
string))
+;; Fixme: Should `process-environment' be recoded if LC_CTYPE &c is set?
(defun setenv (variable &optional value unset substitute-env-vars)
"Set the value of the environment variable named VARIABLE to VALUE.
-VARIABLE should be a string. VALUE is optional; if not provided or is
-`nil', the environment variable VARIABLE will be removed. UNSET
+VARIABLE should be a string. VALUE is optional; if not provided or
+nil, the environment variable VARIABLE will be removed. UNSET
if non-nil means to remove VARIABLE from the environment.
SUBSTITUTE-ENV-VARS, if non-nil, means to substitute environment
variables in VALUE with `substitute-env-vars', where see.
appears at the front of the history list when you type in the new value.
Interactively, always replace environment variables in the new value.
-This function works by modifying `process-environment'."
+This function works by modifying `process-environment'.
+
+As a special case, setting variable `TZ' calls `set-time-zone-rule' as
+a side-effect."
(interactive
(if current-prefix-arg
(list (read-envvar-name "Clear environment variable: " 'exact) nil t)
(when value
(push value setenv-history))
;; Here finally we specify the args to give call setenv with.
- (list var
+ (list var
(read-from-minibuffer (format "Set %s to value: " var)
nil nil nil 'setenv-history
value)
- nil
+ nil
t))))
- (if unset
+ (if (and (multibyte-string-p variable) locale-coding-system)
+ (let ((codings (find-coding-systems-string (concat variable value))))
+ (unless (or (eq 'undecided (car codings))
+ (memq (coding-system-base locale-coding-system) codings))
+ (error "Can't encode `%s=%s' with `locale-coding-system'"
+ variable (or value "")))))
+ (if unset
(setq value nil)
(if substitute-env-vars
(setq value (substitute-env-vars value))))
+ (if (multibyte-string-p variable)
+ (setq variable (encode-coding-string variable locale-coding-system)))
+ (if (and value (multibyte-string-p value))
+ (setq value (encode-coding-string value locale-coding-system)))
(if (string-match "=" variable)
(error "Environment variable name `%s' contains `='" variable)
(let ((pattern (concat "\\`" (regexp-quote (concat variable "="))))
(cond ((string-match pattern (car scan))
(setq found t)
(if (eq nil value)
- (setq process-environment (delq (car scan) process-environment))
+ (setq process-environment (delq (car scan)
+ process-environment))
(setcar scan (concat variable "=" value)))
(setq scan nil)))
(setq scan (cdr scan)))
This function consults the variable `process-environment'
for its value."
(interactive (list (read-envvar-name "Get environment variable: " t)))
- (let ((value (getenv-internal variable)))
+ (let ((value (getenv-internal (if (multibyte-string-p variable)
+ (encode-coding-string
+ variable locale-coding-system)
+ variable))))
+ (if (and enable-multibyte-characters value)
+ (setq value (decode-coding-string value locale-coding-system)))
(when (interactive-p)
(message "%s" (if value value "Not set")))
value))
(provide 'env)
+;;; arch-tag: b7d6a8f7-bc81-46db-8e39-8d721d4ed0b8
;;; env.el ends here
HCoop / bpt / emacs.git / blobdiff