Commit 5d73ac66 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

(sh-shell-variables-initialized): New variable.

(sh-mode): Make sh-shell-variables and
sh-shell-variables-initialized local.
(sh-set-shell): Don't scan the buffer for variable assignments.
Set sh-shell-variables-initialized to nil.
(sh-shell-initialize-variables): New function.
(sh-add-completer): New function.  Initialize sh-shell-variables
here if not yet done.
(sh-add): Use sh-add-completer for completion.
parent 8995e09e
......@@ -121,6 +121,9 @@ These are used for completion in addition to all the variables named
in `process-environment'. Each element looks like (VAR . VAR), where
the car and cdr are the same symbol.")
(defvar sh-shell-variables-initialized nil
"Non-nil if `sh-shell-variables' is initialized.")
(defun sh-canonicalize-shell (shell)
"Convert a shell name SHELL to the one we should handle it as."
(or (symbolp shell)
......@@ -614,6 +617,8 @@ with your script for an edit-interpret-debug cycle."
(make-local-variable 'font-lock-defaults)
(make-local-variable 'skeleton-filter)
(make-local-variable 'skeleton-newline-indent-rigidly)
(make-local-variable 'sh-shell-variables)
(make-local-variable 'sh-shell-variables-initialized)
(setq major-mode 'sh-mode
mode-name "Shell-script"
indent-line-function 'sh-indent-line
......@@ -721,11 +726,9 @@ Calls the value of `sh-set-shell-hook' if set."
comment-start-skip (concat (sh-feature sh-comment-prefix) "#+[\t ]*")
mode-line-process (format "[%s]" sh-shell)
sh-shell-variables nil
sh-shell-variables-initialized nil
shell (sh-feature sh-variables))
(set-syntax-table (sh-feature sh-mode-syntax-table))
(save-excursion
(while (search-forward "=" nil t)
(sh-assignment 0)))
(while shell
(sh-remember-variable (car shell))
(setq shell (cdr shell)))
......@@ -1024,17 +1027,55 @@ region, clear header."
< "done"))
(defun sh-shell-initialize-variables ()
"Scan the buffer for variable assignments.
Add these variables to `sh-shell-variables'."
(message "Scanning buffer `%s' for variable assignments..." (buffer-name))
(save-excursion
(goto-char (point-min))
(setq sh-shell-variables-initialized t)
(while (search-forward "=" nil t)
(sh-assignment 0)))
(message "Scanning buffer `%s' for variable assignments...done"
(buffer-name)))
(defvar sh-add-buffer)
(defun sh-add-completer (string predicate code)
"Do completion using `sh-shell-variables', but initialize it first.
This function is designed for use as the \"completion table\",
so it takes three arguments:
STRING, the current buffer contents;
PREDICATE, the predicate for filtering possible matches;
CODE, which says what kind of things to do.
CODE can be nil, t or `lambda'.
nil means to return the best completion of STRING, or nil if there is none.
t means to return a list of all possible completions of STRING.
`lambda' means to return t if STRING is a valid completion as it stands."
(let ((sh-shell-variables
(save-excursion
(set-buffer sh-add-buffer)
(or sh-shell-variables-initialized
(sh-shell-initialize-variables))
(nconc (mapcar (lambda (var)
(let ((name
(substring var 0 (string-match "=" var))))
(cons name name)))
process-environment)
sh-shell-variables))))
(cond ((null code)
(try-completion string sh-shell-variables predicate))
((eq code t)
(all-completions string sh-shell-variables predicate))
((eq code 'lambda)
(assoc string sh-shell-variables)))))
(defun sh-add (var delta)
"Insert an addition of VAR and prefix DELTA for Bourne (type) shell."
(interactive
(list (completing-read "Variable: "
(nconc (mapcar (lambda (var)
(let ((name
(substring var 0 (string-match "=" var))))
(cons name name)))
process-environment)
sh-shell-variables))
(prefix-numeric-value current-prefix-arg)))
(let ((sh-add-buffer (current-buffer)))
(list (completing-read "Variable: " 'sh-add-completer)
(prefix-numeric-value current-prefix-arg))))
(insert (sh-feature '((bash . "$[ ")
(ksh88 . "$(( ")
(posix . "$(( ")
......
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