sh-script.el 112 KB
Newer Older
Richard M. Stallman's avatar
Richard M. Stallman committed
1
;;; sh-script.el --- shell-script editing commands for Emacs
Erik Naggum's avatar
Erik Naggum committed
2

3
;; Copyright (C) 1993, 94, 95, 96, 97, 1999 by Free Software Foundation, Inc.
Richard M. Stallman's avatar
Richard M. Stallman committed
4

Karl Heuer's avatar
Karl Heuer committed
5
;; Author: Daniel Pfeiffer <occitan@esperanto.org>
6
;; Version: 2.0f
Richard M. Stallman's avatar
Richard M. Stallman committed
7
;; Maintainer: FSF
8
;; Keywords: languages, unix
Richard M. Stallman's avatar
Richard M. Stallman committed
9 10 11 12 13 14 15 16 17 18 19 20 21 22

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
Erik Naggum's avatar
Erik Naggum committed
23 24 25
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
Richard M. Stallman's avatar
Richard M. Stallman committed
26 27 28

;;; Commentary:

29 30 31 32 33
;; Major mode for editing shell scripts.  Bourne, C and rc shells as well
;; as various derivatives are supported and easily derived from.  Structured
;; statements can be inserted with one command or abbrev.  Completion is
;; available for filenames, variables known from the script, the shell and
;; the environment as well as commands.
Richard M. Stallman's avatar
Richard M. Stallman committed
34

35 36
;;; Known Bugs:

37
;; - In Bourne the keyword `in' is not anchored to case, for, select ...
38 39
;; - Variables in `"' strings aren't fontified because there's no way of
;;   syntactically distinguishing those from `'' strings.
40

41 42 43 44 45 46 47 48 49 50 51 52
;;		Indentation
;;	 	===========
;; Indentation for rc and es modes is very limited, but for Bourne shells
;; and its derivatives it is quite customizable.
;; 
;; The following description applies to sh and derived shells (bash,
;; zsh, ...).
;; 
;; There are various customization variables which allow tailoring to
;; a wide variety of styles.  Most of these variables are named
;; sh-indent-for-XXX and sh-indent-after-XXX.  For example.
;; sh-indent-after-if controls the indenting of a line following
Stefan Monnier's avatar
Stefan Monnier committed
53
;; an if statement, and sh-indent-for-fi controls the indentation
54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
;; of the line containing the fi.
;; 
;; You can set each to a numeric value, but it is often more convenient
;; to a symbol such as `+' which uses the value of variable `sh-basic-offset'.
;; By changing this one variable you can increase or decrease how much
;; indentation there is.  Valid symbols:
;; 
;; 	+   Indent right by sh-basic-offset
;; 	-   Indent left  by sh-basic-offset
;; 	++  Indent right twice sh-basic-offset
;; 	--  Indent left  twice sh-basic-offset
;; 	*   Indent right half sh-basic-offset
;; 	/   Indent left  half sh-basic-offset.
;; 
;; There are 4 commands to help set the indentation variables:
;; 
;; `sh-show-indent'
;;    This shows what variable controls the indentation of the current
;;    line and its value.
;; 
;; `sh-set-indent'
;;    This allows you to set the value of the variable controlling the
;;    current line's indentation.  You can enter a number or one of a
;;    number of special symbols to denote the value of sh-basic-offset,
;;    or its negative, or half it, or twice it, etc.  If you've used
;;    cc-mode this should be familiar.  If you forget which symbols are
;;    valid simply press C-h at the prompt.
;; 
;; `sh-learn-line-indent'
;;    Simply make the line look the way you want it, then invoke this
;;    command.  It will set the variable to the value that makes the line
;;    indent like that.  If called with a prefix argument then it will set
;;    the value to one of the symbols if applicable.
;;    
;; `sh-learn-buffer-indent'
;;    This is the deluxe function!  It "learns" the whole buffer (use
;;    narrowing if you want it to process only part).  It outputs to a
;;    buffer *indent* any conflicts it finds, and all the variables it has
;;    learned.  This buffer is a sort of Occur mode buffer, allowing you to
;;    easily find where something was set.  It is popped to automatically
;;    if there are any conflicts found or if `sh-popup-occur-buffer' is
;;    non-nil.
;;    `sh-indent-comment' will be set if all comments follow  the same
;;    pattern;  if they don't it will be set to nil.
;;    Whether `sh-basic-offset' is set is determined by variable
;;    `sh-learn-basic-offset'.
;; 
;;    Unfortunately, `sh-learn-buffer-indent' can take a long time to run
;;    (e.g. if there are large case statements).  Perhaps it does not make
;;    sense to run it on large buffers: if lots of lines have different
;;    indentation styles it will produce a lot of diagnostics in the
;;    *indent* buffer; if there is a consistent style then running
;;    `sh-learn-buffer-indent' on a small region of the buffer should
;;    suffice.
;;   
;; 	Saving indentation values
;; 	-------------------------
;; After you've learned the values in a buffer, how to you remember
;; them?   Originally I had hoped that `sh-learn-buffer-indent'
;; would make this unnecessary;  simply learn the values when you visit
;; the buffer.
;; You can do this automatically like this:
116
;;   (add-hook 'sh-set-shell-hook 'sh-learn-buffer-indent)
117 118
;; 
;; However...   `sh-learn-buffer-indent' is extremely slow,
Stefan Monnier's avatar
Stefan Monnier committed
119
;; especially on large-ish buffer.  Also, if there are conflicts the
120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136
;; "last one wins" which may not produce the desired setting.
;; 
;; So...There is a minimal way of being able to save indentation values and
;; to reload them in another buffer or at another point in time.
;; 
;; Use `sh-name-style' to give a name to the indentation settings of
;; 	the current buffer.
;; Use `sh-load-style' to load indentation settings for the current
;; 	buffer from a specific style.
;; Use `sh-save-styles-to-buffer' to write all the styles to a buffer
;; 	in lisp code.  You can then store it in a file and later use
;; 	`load-file' to load it.
;; 
;; 	Indentation variables - buffer local or global?
;; 	----------------------------------------------
;; I think that often having them buffer-local makes sense,
;; especially if one is using `sh-learn-buffer-indent'.  However, if
Stefan Monnier's avatar
Stefan Monnier committed
137
;; a user sets values using customization, these changes won't appear
138 139
;; to work if the variables are already local!
;; 
Stefan Monnier's avatar
Stefan Monnier committed
140
;; To get round this, there is a variable `sh-make-vars-local' and 2
141 142
;; functions: `sh-make-vars-local' and `sh-reset-indent-vars-to-global-values'.
;; 
Stefan Monnier's avatar
Stefan Monnier committed
143
;; If `sh-make-vars-local' is non-nil, then these variables become
144
;; buffer local when the mode is established.
Stefan Monnier's avatar
Stefan Monnier committed
145
;; If this is nil, then the variables are global.  At any time you
146
;; can make them local with the command `sh-make-vars-local'.
Stefan Monnier's avatar
Stefan Monnier committed
147
;; Conversely, to update with the global values you can use the
148 149
;; command `sh-reset-indent-vars-to-global-values'.
;; 
Stefan Monnier's avatar
Stefan Monnier committed
150
;; This may be awkward, but the intent is to cover all cases.
151 152 153 154 155
;; 
;; 	Awkward things, pitfalls
;; 	------------------------
;; Indentation for a sh script is complicated for a number of reasons:
;; 
Stefan Monnier's avatar
Stefan Monnier committed
156
;; 1. You can't format by simply looking at symbols, you need to look
157 158 159 160
;;    at keywords.  [This is not the case for rc and es shells.]
;; 2. The character ")" is used both as a matched pair "(" ... ")" and
;;    as a stand-alone symbol (in a case alternative).  This makes
;;    things quite tricky!
Stefan Monnier's avatar
Stefan Monnier committed
161
;; 3. Here-documents in a script should be treated "as is", and when
162 163 164 165 166 167 168
;;    they terminate we want to revert to the indentation of the line
;;    containing the "<<" symbol.
;; 4. A line may be continued using the "\".
;; 5. The character "#" (outside a string) normally starts a comment,
;;    but it doesn't in the sequence "$#"!
;; 
;; To try and address points 2 3 and 5 I used a feature that cperl mode
Stefan Monnier's avatar
Stefan Monnier committed
169
;; uses, that of a text's syntax property.  This, however, has 2
170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186
;; disadvantages:
;; 1. We need to scan the buffer to find which ")" symbols belong to a
;;    case alternative, to find any here documents, and handle "$#".
;; 2. Setting the text property makes the buffer modified.  If the
;;    buffer is read-only buffer we have to cheat and bypass the read-only
;;    status.  This is for cases where the buffer started read-only buffer
;;    but the user issued `toggle-read-only'.
;; 
;; 	Bugs
;; 	----
;; - Indenting many lines is slow.  It currently does each line
;;   independently, rather than saving state information.
;; 
;; - `sh-learn-buffer-indent' is extremely slow.
;; 
;; Richard Sharman <rsharman@pobox.com>  June 1999.

Richard M. Stallman's avatar
Richard M. Stallman committed
187 188 189
;;; Code:

;; page 1:	variables and settings
190 191 192 193
;; page 2:	indentation stuff
;; page 3:	mode-command and utility functions
;; page 4:	statement syntax-commands for various shells
;; page 5:	various other commands
Richard M. Stallman's avatar
Richard M. Stallman committed
194

Dave Love's avatar
Dave Love committed
195 196 197
(eval-when-compile
  (require 'skeleton)
  (require 'comint))
198 199
(require 'executable)

200 201


202 203 204 205 206 207 208 209 210 211 212 213
(defgroup sh nil
  "Shell programming utilities"
  :group 'unix
  :group 'languages)

(defgroup sh-script nil
  "Shell script mode"
  :group 'sh
  :prefix "sh-")


(defcustom sh-ancestor-alist
214 215
  '((ash . sh)
    (bash . jsh)
216
    (bash2 . jsh)
217 218 219 220 221 222 223 224 225 226 227 228 229
    (dtksh . ksh)
    (es . rc)
    (itcsh . tcsh)
    (jcsh . csh)
    (jsh . sh)
    (ksh . ksh88)
    (ksh88 . jsh)
    (oash . sh)
    (pdksh . ksh88)
    (posix . sh)
    (tcsh . csh)
    (wksh . ksh88)
    (wsh . sh)
230 231
    (zsh . ksh88)
    (rpm . sh))
232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253
  "*Alist showing the direct ancestor of various shells.
This is the basis for `sh-feature'.  See also `sh-alias-alist'.
By default we have the following three hierarchies:

csh		C Shell
  jcsh		C Shell with Job Control
  tcsh		Toronto C Shell
    itcsh	? Toronto C Shell
rc		Plan 9 Shell
  es		Extensible Shell
sh		Bourne Shell
  ash		? Shell
  jsh		Bourne Shell with Job Control
    bash	GNU Bourne Again Shell
    ksh88	Korn Shell '88
      ksh	Korn Shell '93
	dtksh	CDE Desktop Korn Shell
      pdksh	Public Domain Korn Shell
      wksh	Window Korn Shell
      zsh	Z Shell
  oash		SCO OA (curses) Shell
  posix		IEEE 1003.2 Shell Standard
254 255 256
  wsh		? Shell"
  :type '(repeat (cons symbol symbol))
  :group 'sh-script)
257 258


259
(defcustom sh-alias-alist
260
  (nconc (if (eq system-type 'gnu/linux)
261
	     '((csh . tcsh)
262
	       (ksh . pdksh)))
263 264
	 ;; for the time being
	 '((ksh . ksh88)
265
           (bash2 . bash)
266 267 268
	   (sh5 . sh)))
  "*Alist for transforming shell names to what they really are.
Use this where the name of the executable doesn't correspond to the type of
269 270 271
shell it really is."
  :type '(repeat (cons symbol symbol))
  :group 'sh-script)
272 273


274
(defcustom sh-shell-file
275
  (or
276 277
   ;; On MSDOS and Windows, collapse $SHELL to lower-case and remove
   ;; the executable extension, so comparisons with the list of
278
   ;; known shells work.
279
   (and (memq system-type '(ms-dos windows-nt))
280 281 282 283 284 285 286
	(let* ((shell (getenv "SHELL"))
	       (shell-base
		(and shell (file-name-nondirectory shell))))
	  ;; shell-script mode doesn't support DOS/Windows shells,
	  ;; so use the default instead.
	  (if (or (null shell)
		  (member (downcase shell-base)
287 288
			  '("command.com" "cmd.exe" "4dos.com" "ndos.com"
			    "cmdproxy.exe")))
289 290
	      "/bin/sh"
	    (file-name-sans-extension (downcase shell)))))
291 292
   (getenv "SHELL")
   "/bin/sh")
293 294 295
  "*The executable file name for the shell being programmed."
  :type 'string
  :group 'sh-script)
296 297


298
(defcustom sh-shell-arg
299
  ;; bash does not need any options when run in a shell script,
300
  '((bash)
301 302
    (csh . "-f")
    (pdksh)
303
    ;; Bill_Mann@praxisint.com says -p with ksh can do harm.
304
    (ksh88)
305
    ;; -p means don't initialize functions from the environment.
306
    (rc . "-p")
307 308 309 310
    ;; Someone proposed -motif, but we don't want to encourage
    ;; use of a non-free widget set.
    (wksh)
    ;; -f means don't run .zshrc.
311
    (zsh . "-f"))
312 313 314 315 316 317 318 319
  "*Single argument string for the magic number.  See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice (const :tag "No Arguments" nil)
			       (string :tag "Arguments")
			       (cons :format "Evaluate: %v"
				     (const :format "" eval)
				     sexp))))
  :group 'sh-script)
320

321
(defcustom sh-imenu-generic-expression
322 323
  `((sh
     . ((nil "^\\s-*\\(function\\s-+\\)?\\([A-Za-z_][A-Za-z_0-9]+\\)\\s-*()" 2))))
324 325 326 327
  "*Regular expression for recognizing shell function definitions.
See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       regexp))
Dan Nicolaescu's avatar
Dan Nicolaescu committed
328
  :group 'sh-script
329
  :version "20.4")
330

331 332 333 334 335
(defvar sh-shell-variables nil
  "Alist of shell variable names that should be included in completion.
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.")
336

337 338 339
(defvar sh-shell-variables-initialized nil
  "Non-nil if `sh-shell-variables' is initialized.")

340 341
(defun sh-canonicalize-shell (shell)
  "Convert a shell name SHELL to the one we should handle it as."
342
  (if (string-match "\\.exe\\'" shell)
343
      (setq shell (substring shell 0 (match-beginning 0))))
344 345 346 347
  (or (symbolp shell)
      (setq shell (intern shell)))
  (or (cdr (assq shell sh-alias-alist))
      shell))
348

349 350
(defvar sh-shell (sh-canonicalize-shell (file-name-nondirectory sh-shell-file))
  "The shell being programmed.  This is set by \\[sh-set-shell].")
351

352 353 354 355 356 357
;;; I turned off this feature because it doesn't permit typing commands
;;; in the usual way without help.
;;;(defvar sh-abbrevs
;;;  '((csh eval sh-abbrevs shell
;;;	 "switch" 'sh-case
;;;	 "getopts" 'sh-while-getopts)
358

359 360
;;;    (es eval sh-abbrevs shell
;;;	"function" 'sh-function)
361

362 363
;;;    (ksh88 eval sh-abbrevs sh
;;;	   "select" 'sh-select)
364

365 366 367
;;;    (rc eval sh-abbrevs shell
;;;	"case" 'sh-case
;;;	"function" 'sh-function)
368

369 370 371 372 373
;;;    (sh eval sh-abbrevs shell
;;;	"case" 'sh-case
;;;	"function" 'sh-function
;;;	"until" 'sh-until
;;;	"getopts" 'sh-while-getopts)
374

375 376 377 378 379 380
;;;    ;; The next entry is only used for defining the others
;;;    (shell "for" sh-for
;;;	   "loop" sh-indexed-loop
;;;	   "if" sh-if
;;;	   "tmpfile" sh-tmp-file
;;;	   "while" sh-while)
381

382 383 384 385 386
;;;    (zsh eval sh-abbrevs ksh88
;;;	 "repeat" 'sh-repeat))
;;;  "Abbrev-table used in Shell-Script mode.  See `sh-feature'.
;;;Due to the internal workings of abbrev tables, the shell name symbol is
;;;actually defined as the table for the like of \\[edit-abbrevs].")
Richard M. Stallman's avatar
Richard M. Stallman committed
387 388 389



390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405
(easy-mmode-defsyntax sh-mode-syntax-table
  '((?\# . "<")
   (?\^l . ">#")
   (?\n . ">#")
   (?\" . "\"\"")
   (?\' . "\"'")
   (?\` . "\"`")
   (?! . "_")
   (?% . "_")
   (?: . "_")
   (?. . "_")
   (?^ . "_")
   (?~ . "_")
   (?< . ".")
   (?> . "."))
  "Syntax-table used in Shell-Script mode.")
406

Richard M. Stallman's avatar
Richard M. Stallman committed
407 408

(defvar sh-mode-map
409 410
  (let ((map (make-sparse-keymap))
	(menu-map (make-sparse-keymap "Insert")))
Richard M. Stallman's avatar
Richard M. Stallman committed
411 412 413
    (define-key map "\C-c(" 'sh-function)
    (define-key map "\C-c\C-w" 'sh-while)
    (define-key map "\C-c\C-u" 'sh-until)
414
    (define-key map "\C-c\C-t" 'sh-tmp-file)
Richard M. Stallman's avatar
Richard M. Stallman committed
415
    (define-key map "\C-c\C-s" 'sh-select)
416 417
    (define-key map "\C-c\C-r" 'sh-repeat)
    (define-key map "\C-c\C-o" 'sh-while-getopts)
Richard M. Stallman's avatar
Richard M. Stallman committed
418 419 420 421
    (define-key map "\C-c\C-l" 'sh-indexed-loop)
    (define-key map "\C-c\C-i" 'sh-if)
    (define-key map "\C-c\C-f" 'sh-for)
    (define-key map "\C-c\C-c" 'sh-case)
422 423 424 425
    (define-key map "\C-c?" 'sh-show-indent)
    (define-key map "\C-c=" 'sh-set-indent)
    (define-key map "\C-c<" 'sh-learn-line-indent)
    (define-key map "\C-c>" 'sh-learn-buffer-indent)
426

Richard M. Stallman's avatar
Richard M. Stallman committed
427 428
    (define-key map "=" 'sh-assignment)
    (define-key map "\C-c+" 'sh-add)
429 430
    (define-key map "\C-\M-x" 'sh-execute-region)
    (define-key map "\C-c\C-x" 'executable-interpret)
431
    (define-key map "<" 'sh-maybe-here-document)
432 433 434 435 436 437
    (define-key map "(" 'skeleton-pair-insert-maybe)
    (define-key map "{" 'skeleton-pair-insert-maybe)
    (define-key map "[" 'skeleton-pair-insert-maybe)
    (define-key map "'" 'skeleton-pair-insert-maybe)
    (define-key map "`" 'skeleton-pair-insert-maybe)
    (define-key map "\"" 'skeleton-pair-insert-maybe)
Richard M. Stallman's avatar
Richard M. Stallman committed
438

439
    (substitute-key-definition 'complete-tag 'comint-dynamic-complete
Richard M. Stallman's avatar
Richard M. Stallman committed
440 441 442 443 444 445 446 447 448 449 450 451 452 453
			       map (current-global-map))
    (substitute-key-definition 'newline-and-indent 'sh-newline-and-indent
			       map (current-global-map))
    (substitute-key-definition 'delete-backward-char
			       'backward-delete-char-untabify
			       map (current-global-map))
    (define-key map "\C-c:" 'sh-set-shell)
    (substitute-key-definition 'beginning-of-defun
			       'sh-beginning-of-compound-command
			       map (current-global-map))
    (substitute-key-definition 'backward-sentence 'sh-beginning-of-command
			       map (current-global-map))
    (substitute-key-definition 'forward-sentence 'sh-end-of-command
			       map (current-global-map))
454 455 456 457 458 459
    (define-key map [menu-bar insert] (cons "Insert" menu-map))
    (define-key menu-map [sh-while]	'("While Loop" . sh-while))
    (define-key menu-map [sh-until]	'("Until Loop" . sh-until))
    (define-key menu-map [sh-tmp-file]	'("Temporary File" . sh-tmp-file))
    (define-key menu-map [sh-select]	'("Select Statement" . sh-select))
    (define-key menu-map [sh-repeat]	'("Repeat Loop" . sh-repeat))
460 461
    (define-key menu-map [sh-getopts]	'("Options Loop" . sh-while-getopts))
    (define-key menu-map [sh-indexed-loop] '("Indexed Loop" . sh-indexed-loop))
462 463 464
    (define-key menu-map [sh-if]	'("If Statement" . sh-if))
    (define-key menu-map [sh-for]	'("For Loop" . sh-for))
    (define-key menu-map [sh-case]	'("Case Statement" . sh-case))
Richard M. Stallman's avatar
Richard M. Stallman committed
465 466 467 468 469
    map)
  "Keymap used in Shell-Script mode.")



470
(defcustom sh-dynamic-complete-functions
471 472 473
  '(shell-dynamic-complete-environment-variable
    shell-dynamic-complete-command
    comint-dynamic-complete-filename)
474 475 476
  "*Functions for doing TAB dynamic completion."
  :type '(repeat function)
  :group 'sh-script)
Richard M. Stallman's avatar
Richard M. Stallman committed
477 478


479
(defcustom sh-require-final-newline
480 481 482 483 484
  '((csh . t)
    (pdksh . t)
    (rc eval . require-final-newline)
    (sh eval . require-final-newline))
  "*Value of `require-final-newline' in Shell-Script mode buffers.
485 486 487 488 489 490 491
See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice (const :tag "require" t)
			       (cons :format "Evaluate: %v"
				     (const :format "" eval)
				     sexp))))
  :group 'sh-script)
Richard M. Stallman's avatar
Richard M. Stallman committed
492 493


494
(defcustom sh-assignment-regexp
495 496 497 498 499 500 501
  '((csh . "\\<\\([a-zA-Z0-9_]+\\)\\(\\[.+\\]\\)?[ \t]*[-+*/%^]?=")
    ;; actually spaces are only supported in let/(( ... ))
    (ksh88 . "\\<\\([a-zA-Z0-9_]+\\)\\(\\[.+\\]\\)?[ \t]*\\([-+*/%&|~^]\\|<<\\|>>\\)?=")
    (rc . "\\<\\([a-zA-Z0-9_*]+\\)[ \t]*=")
    (sh . "\\<\\([a-zA-Z0-9_]+\\)="))
  "*Regexp for the variable name and what may follow in an assignment.
First grouping matches the variable name.  This is upto and including the `='
502 503 504 505 506 507 508
sign.  See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice regexp
			       (cons :format "Evaluate: %v"
				     (const :format "" eval)
				     sexp))))
  :group 'sh-script)
Richard M. Stallman's avatar
Richard M. Stallman committed
509 510


511 512 513 514
(defcustom sh-indentation 4
  "The width for further indentation in Shell-Script mode."
  :type 'integer
  :group 'sh-script)
Richard M. Stallman's avatar
Richard M. Stallman committed
515 516


517 518 519 520
(defcustom sh-remember-variable-min 3
  "*Don't remember variables less than this length for completing reads."
  :type 'integer
  :group 'sh-script)
Richard M. Stallman's avatar
Richard M. Stallman committed
521 522


523
(defvar sh-header-marker nil
524
  "When non-nil is the end of header for prepending by \\[sh-execute-region].
525 526 527
That command is also used for setting this variable.")


528
(defcustom sh-beginning-of-command
529
  "\\([;({`|&]\\|\\`\\|[^\\]\n\\)[ \t]*\\([/~a-zA-Z0-9:]\\)"
Richard M. Stallman's avatar
Richard M. Stallman committed
530
  "*Regexp to determine the beginning of a shell command.
531 532 533
The actual command starts at the beginning of the second \\(grouping\\)."
  :type 'regexp
  :group 'sh-script)
Richard M. Stallman's avatar
Richard M. Stallman committed
534

535

536
(defcustom sh-end-of-command
537
  "\\([/~a-zA-Z0-9:]\\)[ \t]*\\([;#)}`|&]\\|$\\)"
Richard M. Stallman's avatar
Richard M. Stallman committed
538
  "*Regexp to determine the end of a shell command.
539 540 541
The actual command ends at the end of the first \\(grouping\\)."
  :type 'regexp
  :group 'sh-script)
Richard M. Stallman's avatar
Richard M. Stallman committed
542 543 544



545
(defvar sh-here-document-word "EOF"
Richard M. Stallman's avatar
Richard M. Stallman committed
546 547
  "Word to delimit here documents.")

Karl Heuer's avatar
Karl Heuer committed
548 549 550 551 552
(defvar sh-test
  '((sh "[  ]" . 3)
    (ksh88 "[[  ]]" . 4))
  "Initial input in Bourne if, while and until skeletons.  See `sh-feature'.")

Richard M. Stallman's avatar
Richard M. Stallman committed
553

554 555 556
;; customized this out of sheer bravado.  not for the faint of heart.
;; but it *did* have an asterisk in the docstring!
(defcustom sh-builtins
557 558 559 560
  '((bash eval sh-append posix
	  "alias" "bg" "bind" "builtin" "declare" "dirs" "enable" "fc" "fg"
	  "help" "history" "jobs" "kill" "let" "local" "popd" "pushd" "source"
	  "suspend" "typeset" "unalias")
Richard M. Stallman's avatar
Richard M. Stallman committed
561

562 563
    ;; The next entry is only used for defining the others
    (bourne eval sh-append shell
564 565
	    "eval" "export" "getopts" "newgrp" "pwd" "read" "readonly"
	    "times" "ulimit")
Richard M. Stallman's avatar
Richard M. Stallman committed
566

567
    (csh eval sh-append shell
568 569 570 571
	 "alias" "chdir" "glob" "history" "limit" "nice" "nohup" "rehash"
	 "setenv" "source" "time" "unalias" "unhash")

    (dtksh eval identity wksh)
Richard M. Stallman's avatar
Richard M. Stallman committed
572

573 574
    (es "access" "apids" "cd" "echo" "eval" "false" "let" "limit" "local"
	"newpgrp" "result" "time" "umask" "var" "vars" "wait" "whatis")
Richard M. Stallman's avatar
Richard M. Stallman committed
575

576 577
    (jsh eval sh-append sh
	 "bg" "fg" "jobs" "kill" "stop" "suspend")
Richard M. Stallman's avatar
Richard M. Stallman committed
578

579
    (jcsh eval sh-append csh
580
	  "bg" "fg" "jobs" "kill" "notify" "stop" "suspend")
581 582

    (ksh88 eval sh-append bourne
583 584
	   "alias" "bg" "false" "fc" "fg" "jobs" "kill" "let" "print" "time"
	   "typeset" "unalias" "whence")
585 586 587 588 589 590 591 592 593 594 595 596 597

    (oash eval sh-append sh
	  "checkwin" "dateline" "error" "form" "menu" "newwin" "oadeinit"
	  "oaed" "oahelp" "oainit" "pp" "ppfile" "scan" "scrollok" "wattr"
	  "wclear" "werase" "win" "wmclose" "wmmessage" "wmopen" "wmove"
	  "wmtitle" "wrefresh")

    (pdksh eval sh-append ksh88
	   "bind")

    (posix eval sh-append sh
	   "command")

598 599
    (rc "builtin" "cd" "echo" "eval" "limit" "newpgrp" "shift" "umask" "wait"
	"whatis")
600 601 602 603 604

    (sh eval sh-append bourne
	"hash" "test" "type")

    ;; The next entry is only used for defining the others
605 606 607 608
    (shell "cd" "echo" "eval" "set" "shift" "umask" "unset" "wait")

    (wksh eval sh-append ksh88
	  "Xt[A-Z][A-Za-z]*")
609 610

    (zsh eval sh-append ksh88
611 612 613 614 615 616
	 "autoload" "bindkey" "builtin" "chdir" "compctl" "declare" "dirs"
	 "disable" "disown" "echotc" "enable" "functions" "getln" "hash"
	 "history" "integer" "limit" "local" "log" "popd" "pushd" "r"
	 "readonly" "rehash" "sched" "setopt" "source" "suspend" "true"
	 "ttyctl" "type" "unfunction" "unhash" "unlimit" "unsetopt" "vared"
	 "which"))
617 618
  "*List of all shell builtins for completing read and fontification.
Note that on some systems not all builtins are available or some are
619 620 621 622 623 624 625
implemented as aliases.  See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice (repeat string)
			       (cons :format "Evaluate: %v"
				     (const :format "" eval)
				     sexp))))
  :group 'sh-script)
626 627


628

629
(defcustom sh-leading-keywords
630 631 632 633 634 635 636 637 638 639
  '((csh "else")

    (es "true" "unwind-protect" "whatis")

    (rc "else")

    (sh "do" "elif" "else" "if" "then" "trap" "type" "until" "while"))
  "*List of keywords that may be immediately followed by a builtin or keyword.
Given some confusion between keywords and builtins depending on shell and
system, the distinction here has been based on whether they influence the
640 641 642 643 644 645 646
flow of control or syntax.  See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice (repeat string)
			       (cons :format "Evaluate: %v"
				     (const :format "" eval)
				     sexp))))
  :group 'sh-script)
647 648


649
(defcustom sh-other-keywords
650 651
  '((bash eval sh-append bourne
	  "bye" "logout")
652 653

    ;; The next entry is only used for defining the others
654 655
    (bourne eval sh-append sh
	    "function")
656

657 658 659
    (csh eval sh-append shell
	 "breaksw" "default" "end" "endif" "endsw" "foreach" "goto"
	 "if" "logout" "onintr" "repeat" "switch" "then" "while")
660

661 662
    (es "break" "catch" "exec" "exit" "fn" "for" "forever" "fork" "if"
	"return" "throw" "while")
663 664

    (ksh88 eval sh-append bourne
665
	   "select")
666

667 668
    (rc "break" "case" "exec" "exit" "fn" "for" "if" "in" "return" "switch"
	"while")
669

670 671 672
    (sh eval sh-append shell
	"done" "esac" "fi" "for" "in" "return")

673 674
    ;; The next entry is only used for defining the others
    (shell "break" "case" "continue" "exec" "exit")
675

676 677 678
    (zsh eval sh-append bash
	 "select"))
  "*List of keywords not in `sh-leading-keywords'.
679 680 681 682 683 684 685
See `sh-feature'."
  :type '(repeat (cons (symbol :tag "Shell")
		       (choice (repeat string)
			       (cons :format "Evaluate: %v"
				     (const :format "" eval)
				     sexp))))
  :group 'sh-script)
686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709



(defvar sh-variables
  '((bash eval sh-append sh
	  "allow_null_glob_expansion" "auto_resume" "BASH" "BASH_VERSION"
	  "cdable_vars" "ENV" "EUID" "FCEDIT" "FIGNORE" "glob_dot_filenames"
	  "histchars" "HISTFILE" "HISTFILESIZE" "history_control" "HISTSIZE"
	  "hostname_completion_file" "HOSTTYPE" "IGNOREEOF" "ignoreeof"
	  "LINENO" "MAIL_WARNING" "noclobber" "nolinks" "notify"
	  "no_exit_on_failed_exec" "NO_PROMPT_VARS" "OLDPWD" "OPTERR" "PPID"
	  "PROMPT_COMMAND" "PS4" "pushd_silent" "PWD" "RANDOM" "REPLY"
	  "SECONDS" "SHLVL" "TMOUT" "UID")

    (csh eval sh-append shell
	 "argv" "cdpath" "child" "echo" "histchars" "history" "home"
	 "ignoreeof" "mail" "noclobber" "noglob" "nonomatch" "path" "prompt"
	 "shell" "status" "time" "verbose")

    (es eval sh-append shell
	"apid" "cdpath" "CDPATH" "history" "home" "ifs" "noexport" "path"
	"pid" "prompt" "signals")

    (jcsh eval sh-append csh
710
	  "notify")
711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754

    (ksh88 eval sh-append sh
	   "ENV" "ERRNO" "FCEDIT" "FPATH" "HISTFILE" "HISTSIZE" "LINENO"
	   "OLDPWD" "PPID" "PS3" "PS4" "PWD" "RANDOM" "REPLY" "SECONDS"
	   "TMOUT")

    (oash eval sh-append sh
	  "FIELD" "FIELD_MAX" "LAST_KEY" "OALIB" "PP_ITEM" "PP_NUM")

    (rc eval sh-append shell
	"apid" "apids" "cdpath" "CDPATH" "history" "home" "ifs" "path" "pid"
	"prompt" "status")

    (sh eval sh-append shell
	"CDPATH" "IFS" "OPTARG" "OPTIND" "PS1" "PS2")

    ;; The next entry is only used for defining the others
    (shell "COLUMNS" "EDITOR" "HOME" "HUSHLOGIN" "LANG" "LC_COLLATE"
	   "LC_CTYPE" "LC_MESSAGES" "LC_MONETARY" "LC_NUMERIC" "LC_TIME"
	   "LINES" "LOGNAME" "MAIL" "MAILCHECK" "MAILPATH" "PAGER" "PATH"
	   "SHELL" "TERM" "TERMCAP" "TERMINFO" "VISUAL")

    (tcsh eval sh-append csh
	  "addsuffix" "ampm" "autocorrect" "autoexpand" "autolist"
	  "autologout" "chase_symlinks" "correct" "dextract" "edit" "el"
	  "fignore" "gid" "histlit" "HOST" "HOSTTYPE" "HPATH"
	  "ignore_symlinks" "listjobs" "listlinks" "listmax" "matchbeep"
	  "nobeep" "NOREBIND" "oid" "printexitvalue" "prompt2" "prompt3"
	  "pushdsilent" "pushdtohome" "recexact" "recognize_only_executables"
	  "rmstar" "savehist" "SHLVL" "showdots" "sl" "SYSTYPE" "tcsh" "term"
	  "tperiod" "tty" "uid" "version" "visiblebell" "watch" "who"
	  "wordchars")

    (zsh eval sh-append ksh88
	 "BAUD" "bindcmds" "cdpath" "DIRSTACKSIZE" "fignore" "FIGNORE" "fpath"
	 "HISTCHARS" "hostcmds" "hosts" "HOSTS" "LISTMAX" "LITHISTSIZE"
	 "LOGCHECK" "mailpath" "manpath" "NULLCMD" "optcmds" "path" "POSTEDIT"
	 "prompt" "PROMPT" "PROMPT2" "PROMPT3" "PROMPT4" "psvar" "PSVAR"
	 "READNULLCMD" "REPORTTIME" "RPROMPT" "RPS1" "SAVEHIST" "SPROMPT"
	 "STTY" "TIMEFMT" "TMOUT" "TMPPREFIX" "varcmds" "watch" "WATCH"
	 "WATCHFMT" "WORDCHARS" "ZDOTDIR"))
  "List of all shell variables available for completing read.
See `sh-feature'.")

755 756 757 758 759 760 761 762 763 764 765 766 767 768 769

;;; Font-Lock support

(defface sh-heredoc-face
  '((((class color)
      (background dark))
     (:foreground "yellow" :bold t))
    (((class color)
      (background light))
     (:foreground "tan" ))
    (t
     (:bold t)))
  "Face to show a here-document"
  :group 'sh-indentation)
(defvar sh-heredoc-face 'sh-heredoc-face)
770 771 772 773 774


(defvar sh-font-lock-keywords
  '((csh eval sh-append shell
	 '("\\${?[#?]?\\([A-Za-z_][A-Za-z0-9_]*\\|0\\)" 1
Karl Heuer's avatar
Karl Heuer committed
775
	   font-lock-variable-name-face))
776 777 778

    (es eval sh-append executable-font-lock-keywords
	'("\\$#?\\([A-Za-z_][A-Za-z0-9_]*\\|[0-9]+\\)" 1
Karl Heuer's avatar
Karl Heuer committed
779
	  font-lock-variable-name-face))
780

781
    (rc eval identity es)
782 783

    (sh eval sh-append shell
784
	;; Variable names.
785
	'("\\$\\({#?\\)?\\([A-Za-z_][A-Za-z0-9_]*\\|[-#?@!]\\)" 2
786 787 788 789 790
	  font-lock-variable-name-face)
	;; Function names.
	'("^\\(\\sw+\\)[ \t]*(" 1 font-lock-function-name-face)
	'("\\<\\(function\\)\\>[ \t]*\\(\\sw+\\)?"
	  (1 font-lock-keyword-face) (2 font-lock-function-name-face nil t)))
791 792 793

    ;; The next entry is only used for defining the others
    (shell eval sh-append executable-font-lock-keywords
794
	   '("\\\\[^A-Za-z0-9]" 0 font-lock-string-face)
795
	   '("\\${?\\([A-Za-z_][A-Za-z0-9_]*\\|[0-9]+\\|[$*_]\\)" 1
796 797 798 799 800
	     font-lock-variable-name-face))
    (rpm eval sh-append rpm2
	 '("%{?\\(\\sw+\\)"  1 font-lock-keyword-face))
    (rpm2 eval sh-append shell
	  '("^\\(\\sw+\\):"  1 font-lock-variable-name-face)))
801
  "Default expressions to highlight in Shell Script modes.  See `sh-feature'.")
802

803
(defvar sh-font-lock-keywords-1
804
  '((sh "[ \t]in\\>"))
805
  "Subdued level highlighting for Shell Script modes.")
806 807

(defvar sh-font-lock-keywords-2 ()
808
  "Gaudy level highlighting for Shell Script modes.")
809

810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864
;; These are used for the syntax table stuff (derived from cperl-mode).
;; Note: parse-sexp-lookup-properties must be set to t for it to work.
(defconst sh-st-punc (string-to-syntax "."))
(defconst sh-here-doc-syntax (string-to-syntax "|")) ;; generic string

(defun sh-font-lock-heredoc (start string quoted)
  "Determine the syntax of the \\n after a <<HEREDOC."
  (unless (sh-in-comment-or-string start)
    ;; We're looking at <<STRING, so we add "^STRING$" to the syntactic
    ;; font-lock keywords to detect the end of this here document.
    (let ((ere (concat
		"^" (if quoted "[ \t]*")
		(regexp-quote (replace-regexp-in-string "['\"]" "" string))
		"\\(\n\\)")))
      (unless (assoc ere font-lock-syntactic-keywords)
	(let* (	;; A rough regexp that should find us back.
	       (sre (concat "<<\\(-\\)?\\s-*['\"]?"
			    (regexp-quote string) "['\"]?[ \t\n]"))
	       (code `(cond
		       ((save-excursion (re-search-backward ,sre nil t))
			;; This ^STRING$ is indeed following a <<STRING
			sh-here-doc-syntax)
		       ((not (save-excursion (re-search-forward ,sre nil t)))
			;; There's no <<STRING either before or after us,
			;; so we should remove this now obsolete entry.
			(setq font-lock-syntactic-keywords
			      (delq (assoc ,ere font-lock-syntactic-keywords)
				    font-lock-syntactic-keywords))
			nil))))
	  ;; Use destructive update so the new keyword gets used right away.
	  (setq font-lock-syntactic-keywords
		(nconc font-lock-syntactic-keywords
		       (list (font-lock-compile-keyword `(,ere 1 ,code))))))))
    sh-here-doc-syntax))

(defun sh-font-lock-paren (start)
  (save-excursion
    (goto-char start)
    ;; Skip through all patterns
    (while
	(progn
	  (forward-comment (- (point-max)))
	  ;; Skip through one pattern
	  (while
	      (or (/= 0 (skip-syntax-backward "w_"))
		  (/= 0 (skip-chars-backward "?*/"))
		  (when (memq (char-before) '(?\" ?\'))
		    (condition-case nil (progn (backward-sexp 1) t)
		      (error nil)))))
	  (forward-comment (- (point-max)))
	  (when (eq (char-before) ?|)
	    (backward-char 1) t)))
    (when (save-excursion (backward-char 2) (looking-at ";;\\|in"))
      sh-st-punc)))

865 866
(defconst sh-font-lock-syntactic-keywords
  ;; Mark a `#' character as having punctuation syntax in a variable reference.
867 868 869 870 871 872 873
  ;; Really we should do this properly.  From Chet Ramey and Brian Fox:
  ;; "A `#' begins a comment when it is unquoted and at the beginning of a
  ;; word.  In the shell, words are separated by metacharacters."
  ;; To do this in a regexp would be slow as it would be anchored to the right.
  ;; But I can't be bothered to write a function to do it properly and
  ;; efficiently.  So we only do it properly for `#' in variable references and
  ;; do it efficiently by anchoring the regexp to the left.
874 875 876 877 878 879 880
  `(("\\${?[^}#\n\t ]*\\(##?\\)" 1 ,sh-st-punc)
    ;; Find HEREDOC starters and add a corresponding rule for the ender.
    ("[^<>]<<\\(-\\)?\\s-*\\(\\(['\"][^'\"]+['\"]\\|\\sw\\|\\s_\\)+\\).*\\(\n\\)"
     4 (sh-font-lock-heredoc
	(match-beginning 0) (match-string 2) (match-end 1)))
    ;; Distinguish the special close-paren in `case'.
    (")" 0 (sh-font-lock-paren (match-beginning 0)))))
881

882 883 884 885 886 887 888
(defun sh-font-lock-syntactic-face-function (state)
  (if (nth 3 state)
      (if (char-valid-p (nth 3 state))
	  font-lock-string-face
	sh-heredoc-face)
    font-lock-comment-face))

889 890 891 892 893 894 895 896 897 898 899 900
(defgroup sh-indentation nil
  "Variables controlling indentation in shell scripts.

Note: customizing these variables will not affect existing buffers if
`sh-make-vars-local' is no-nil.  See the documentation for
variable `sh-make-vars-local', command `sh-make-vars-local'
and command `sh-reset-indent-vars-to-global-values'."
  :group 'sh-script)


(defcustom sh-set-shell-hook nil
  "*Hook run by `sh-set-shell'."
901
  :type 'hook
902 903 904 905
  :group 'sh-script)

(defcustom sh-mode-hook nil
  "*Hook run by `sh-mode'."
906
  :type 'hook
907 908 909 910 911 912 913 914 915 916 917
  :group 'sh-script)

(defcustom sh-learn-basic-offset nil
  "*When `sh-guess-basic-offset' should learn `sh-basic-offset'.

nil mean:              never.
t means:               only if there seems to be an obvious value.
Anything else means:   whenever we have a \"good guess\" as to the value."
  :type '(choice
	  (const :tag "Never" nil)
	  (const :tag "Only if sure"  t)
Stefan Monnier's avatar
Stefan Monnier committed
918
	  (const :tag "If have a good guess" usually))
919 920 921
  :group 'sh-indentation)

(defcustom sh-popup-occur-buffer nil
Stefan Monnier's avatar
Stefan Monnier committed
922 923
  "*Controls when  `sh-learn-buffer-indent' pops the *indent* buffer.
If t it is always shown.  If nil, it is shown only when there
924 925 926
are conflicts."
  :type '(choice
	  (const :tag "Only when there are conflicts." nil)
Stefan Monnier's avatar
Stefan Monnier committed
927
	  (const :tag "Always"  t))
928 929 930
  :group 'sh-indentation)

(defcustom sh-blink t
Stefan Monnier's avatar
Stefan Monnier committed
931
  "*If non-nil, `sh-show-indent' shows the line indentation is relative to.
932 933 934 935 936 937 938 939 940
The position on the line is not necessarily meaningful.
In some cases the line will be the matching keyword, but this is not
always the case."
  :type 'boolean
  :group 'sh-indentation)

(defcustom sh-first-lines-indent 0
  "*The indentation of the first non-blank non-comment line.
Usually 0 meaning first column.
Stefan Monnier's avatar
Stefan Monnier committed
941
Can be set to a number, or to nil which means leave it as is."
942 943 944
  :type '(choice
	  (const :tag "Leave as is"	nil)
	  (integer :tag "Column number"
Stefan Monnier's avatar
Stefan Monnier committed
945
		   :menu-tag "Indent to this col (0 means first col)" ))
946 947 948 949
  :group 'sh-indentation)


(defcustom sh-basic-offset 4
Stefan Monnier's avatar
Stefan Monnier committed
950
  "*The default indentation increment.
951 952 953 954 955 956 957
This value is used for the + and - symbols in an indentation variable."
  :type 'integer
  :group 'sh-indentation)

(defcustom sh-indent-comment nil
  "*How a comment line is to be indented.
nil means leave it as it is;
Stefan Monnier's avatar
Stefan Monnier committed
958
t  means indent it as a normal line, aligning it to previous non-blank
959
   non-comment line;
Stefan Monnier's avatar
Stefan Monnier committed
960
a number means align to that column, e.g. 0 means fist column."
961 962 963 964
  :type '(choice
	  (const :tag "Leave as is." nil)
	  (const :tag "Indent as a normal line."  t)
	  (integer :menu-tag "Indent to this col (0 means first col)."
965
		   :tag "Indent to column number.") )
966 967 968 969 970 971 972 973 974 975 976 977 978 979
  :group 'sh-indentation)


(defvar sh-debug nil
  "Enable lots of debug messages - if function `sh-debug' is enabled.")


;; Uncomment this defun and comment the defmacro for debugging.
;; (defun sh-debug (&rest args)
;;   "For debugging:  display message ARGS if variable SH-DEBUG is non-nil."
;;   (if sh-debug
;;       (apply 'message args)))
(defmacro sh-debug (&rest args))

980 981 982 983 984 985 986 987 988 989 990 991 992
(defconst sh-symbol-list
  '((const :tag "+ "  :value +
	   :menu-tag "+   Indent right by sh-basic-offset")
    (const :tag "- "  :value -
	   :menu-tag "-   Indent left  by sh-basic-offset")
    (const :tag "++"  :value  ++
	   :menu-tag "++  Indent right twice sh-basic-offset")
    (const :tag "--"  :value --
	   :menu-tag "--  Indent left  twice sh-basic-offset")
    (const :tag "* " :value *
	   :menu-tag "*   Indent right half sh-basic-offset")
    (const :tag "/ " :value /
	   :menu-tag "/   Indent left  half sh-basic-offset")))
993 994 995 996 997 998 999 1000 1001 1002 1003

(defcustom sh-indent-for-else 0
  "*How much to indent an else relative to an if.  Usually 0."
  :type `(choice
	  (integer :menu-tag "A number (positive=>indent right)"
		   :tag "A number")
	  (const :tag "--") ;; separator!
	  ,@ sh-symbol-list
	  )
  :group 'sh-indentation)

1004
(defconst sh-number-or-symbol-list
1005 1006 1007
  (append '((integer :menu-tag "A number (positive=>indent right)"
		     :tag "A number")
	    (const :tag "--"))		; separator
1008
	  sh-symbol-list))
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038

(defcustom sh-indent-for-fi 0
  "*How much to indent a fi relative to an if.   Usually 0."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-for-done '0
  "*How much to indent a done relative to its matching stmt.   Usually 0."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-after-else '+
  "*How much to indent a statement after an else statement."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-after-if '+
  "*How much to indent a statement after an if statement.
This includes lines after else and elif statements, too, but
does not affect then else elif or fi statements themselves."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-for-then '+
  "*How much to indent an then relative to an if."
  :type `(choice ,@ sh-number-or-symbol-list )
  :group 'sh-indentation)

(defcustom sh-indent-for-do '*
  "*How much to indent a do statement.
Stefan Monnier's avatar
Stefan Monnier committed
1039
This is relative to the statement before the do, i.e. the
1040 1041 1042 1043 1044
while until or for statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-do '*
1045
  "*How much to indent a line after a do statement.
1046
This is used when the do is the first word of the line.
Stefan Monnier's avatar
Stefan Monnier committed
1047
This is relative to the statement before the do, e.g. a
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
while for repeat or select statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-loop-construct '+
  "*How much to indent a statement after a loop construct.

This variable is used when the keyword \"do\" is on the same line as the
loop statement (e.g.  \"until\", \"while\" or \"for\").
If the do is on a line by itself, then `sh-indent-after-do' is used instead."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)


(defcustom sh-indent-after-done 0
  "*How much to indent a statement after a \"done\" keyword.
Normally this is 0, which aligns the \"done\" to the matching
looping construct line.
Setting it non-zero allows you to have the \"do\" statement on a line
by itself and align the done under to do."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-for-case-label '+
  "*How much to indent a case label statement.
This is relative to the line containing the case statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-for-case-alt '++
  "*How much to indent statements after the case label.
This is relative to the line containing the case statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)


(defcustom sh-indent-for-continuation '+
  "*How much to indent for a continuation statement."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-open '+
  "*How much to indent after a line with an opening parenthesis or brace.
For an open paren after a function `sh-indent-after-function' is used."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-function '+
  "*How much to indent after a function line."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

;; These 2 are for the rc shell:

(defcustom sh-indent-after-switch '+
  "*How much to indent a case statement relative to the switch statement.
This is for the rc shell."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

(defcustom sh-indent-after-case '+
  "*How much to indent a statement relative to the case statement.
This is for the rc shell."
  :type `(choice ,@ sh-number-or-symbol-list)
  :group 'sh-indentation)

;; Internal use - not designed to be changed by the user:

(defun sh-mkword-regexpr (word)
  "Make a regexp which matches WORD as a word.
Stefan Monnier's avatar
Stefan Monnier committed
1118
This specifically excludes an occurrence of WORD followed by
1119 1120 1121
punctuation characters like '-'."
  (concat word "\\([^-a-z0-9_]\\|$\\)"))

1122
(defconst sh-re-done (sh-mkword-regexpr "done"))
1123 1124 1125


(defconst sh-kws-for-done
1126
  '((sh .  ( "while" "until" "for" ) )
1127 1128
    (bash . ( "while" "until" "for" "select"  ) )
    (ksh88 . ( "while" "until" "for" "select"  ) )
1129 1130
    (zsh .  ( "while" "until" "for" "repeat" "select" ) ) )
  "Which keywords can match the word `done' in this shell.")
1131 1132 1133


(defconst sh-indent-supported
1134
  '((sh . t)
1135
    (csh . nil)
1136 1137 1138 1139 1140
    (rc . t))
  "Shell types that shell indenting can do something with.")

(defvar sh-indent-supported-here nil
  "Non-nil if we support indentation for the current buffer's shell type.")
1141 1142

(defconst sh-electric-rparen-needed
1143 1144 1145
  '((sh . t))
  "Non-nil if the shell type needs an electric handling of case alternatives.")

1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165
(defconst sh-var-list
  '(
    sh-basic-offset sh-first-lines-indent sh-indent-after-case
    sh-indent-after-do sh-indent-after-done
    sh-indent-after-else
    sh-indent-after-if
    sh-indent-after-loop-construct
    sh-indent-after-open
    sh-indent-comment
    sh-indent-for-case-alt
    sh-indent-for-case-label
    sh-indent-for-continuation
    sh-indent-for-do
    sh-indent-for-done
    sh-indent-for-else
    sh-indent-for-fi
    sh-indent-for-then
    )
  "A list of variables used by script mode to control indentation.
This list is used when switching between buffer-local and global
Stefan Monnier's avatar
Stefan Monnier committed
1166
values of variables, and for the commands using indentation styles.")
1167 1168 1169

(defvar sh-make-vars-local t
  "*Controls whether indentation variables are local to the buffer.
Stefan Monnier's avatar
Stefan Monnier committed
1170 1171
If non-nil, indentation variables are made local initially.
If nil, you can later make the variables local by invoking
1172 1173 1174 1175
command `sh-make-vars-local'.
The default is t because I assume that in one Emacs session one is
frequently editing existing scripts with different styles.")

1176 1177 1178 1179

;; mode-comma