code.delx.au - gnu-emacs/blob - lisp/progmodes/sh-script.el

   1 ;;; sh-script.el --- shell-script editing commands for Emacs
   2
   3 ;; Copyright (C) 1993, 1994, 1995, 1996 by Free Software Foundation, Inc.
   4
   5 ;; Author: Daniel.Pfeiffer@Informatik.START.dbp.de, fax (+49 69) 7588-2389
   6 ;; Version: 2.0e
   7 ;; Maintainer: FSF
   8 ;; Keywords: languages, unix
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 ;; Boston, MA 02111-1307, USA.
  26
  27 ;;; Commentary:
  28
  29 ;; Major mode for editing shell scripts.  Bourne, C and rc shells as well
  30 ;; as various derivatives are supported and easily derived from.  Structured
  31 ;; statements can be inserted with one command or abbrev.  Completion is
  32 ;; available for filenames, variables known from the script, the shell and
  33 ;; the environment as well as commands.
  34
  35 ;;; Known Bugs:
  36
  37 ;; - In Bourne the keyword `in' is not anchored to case, for, select ...
  38 ;; - Variables in `"' strings aren't fontified because there's no way of
  39 ;;   syntactically distinguishing those from `'' strings.
  40
  41 ;;; Code:
  42
  43 ;; page 1:      variables and settings
  44 ;; page 2:      mode-command and utility functions
  45 ;; page 3:      statement syntax-commands for various shells
  46 ;; page 4:      various other commands
  47
  48 (require 'executable)
  49
  50 (defvar sh-ancestor-alist
  51   '((ash . sh)
  52     (bash . jsh)
  53     (dtksh . ksh)
  54     (es . rc)
  55     (itcsh . tcsh)
  56     (jcsh . csh)
  57     (jsh . sh)
  58     (ksh . ksh88)
  59     (ksh88 . jsh)
  60     (oash . sh)
  61     (pdksh . ksh88)
  62     (posix . sh)
  63     (tcsh . csh)
  64     (wksh . ksh88)
  65     (wsh . sh)
  66     (zsh . ksh88))
  67   "*Alist showing the direct ancestor of various shells.
  68 This is the basis for `sh-feature'.  See also `sh-alias-alist'.
  69 By default we have the following three hierarchies:
  70
  71 csh             C Shell
  72   jcsh          C Shell with Job Control
  73   tcsh          Toronto C Shell
  74     itcsh       ? Toronto C Shell
  75 rc              Plan 9 Shell
  76   es            Extensible Shell
  77 sh              Bourne Shell
  78   ash           ? Shell
  79   jsh           Bourne Shell with Job Control
  80     bash        GNU Bourne Again Shell
  81     ksh88       Korn Shell '88
  82       ksh       Korn Shell '93
  83         dtksh   CDE Desktop Korn Shell
  84       pdksh     Public Domain Korn Shell
  85       wksh      Window Korn Shell
  86       zsh       Z Shell
  87   oash          SCO OA (curses) Shell
  88   posix         IEEE 1003.2 Shell Standard
  89   wsh           ? Shell")
  90
  91
  92 (defvar sh-alias-alist
  93   (nconc (if (eq system-type 'linux)
  94              '((csh . tcsh)
  95                (ksh . pdksh)))
  96          ;; for the time being
  97          '((ksh . ksh88)
  98            (sh5 . sh)))
  99   "*Alist for transforming shell names to what they really are.
 100 Use this where the name of the executable doesn't correspond to the type of
 101 shell it really is.")
 102
 103
 104 (defvar sh-shell-file (or (getenv "SHELL") "/bin/sh")
 105   "*The executable file name for the shell being programmed.")
 106
 107
 108 (defvar sh-shell-arg
 109   '((bash . "-norc")
 110     (csh . "-f")
 111     (ksh88 eval progn nil (if (file-exists-p "/etc/suid_profile") nil "-p"))
 112     (pdksh)
 113     (rc . "-p")
 114     (wksh . "-motif")
 115     (zsh . "-f"))
 116   "*Single argument string for the magic number.  See `sh-feature'.")
 117
 118 (defvar sh-shell-variables nil
 119   "Alist of shell variable names that should be included in completion.
 120 These are used for completion in addition to all the variables named
 121 in `process-environment'.  Each element looks like (VAR . VAR), where
 122 the car and cdr are the same symbol.")
 123
 124 (defun sh-canonicalize-shell (shell)
 125   "Convert a shell name SHELL to the one we should handle it as."
 126   (or (symbolp shell)
 127       (setq shell (intern shell)))
 128   (or (cdr (assq shell sh-alias-alist))
 129       shell))
 130
 131 (defvar sh-shell (sh-canonicalize-shell (file-name-nondirectory sh-shell-file))
 132   "The shell being programmed.  This is set by \\[sh-set-shell].")
 133
 134 ;;; I turned off this feature because it doesn't permit typing commands
 135 ;;; in the usual way without help.
 136 ;;;(defvar sh-abbrevs
 137 ;;;  '((csh eval sh-abbrevs shell
 138 ;;;      "switch" 'sh-case
 139 ;;;      "getopts" 'sh-while-getopts)
 140
 141 ;;;    (es eval sh-abbrevs shell
 142 ;;;     "function" 'sh-function)
 143
 144 ;;;    (ksh88 eval sh-abbrevs sh
 145 ;;;        "select" 'sh-select)
 146
 147 ;;;    (rc eval sh-abbrevs shell
 148 ;;;     "case" 'sh-case
 149 ;;;     "function" 'sh-function)
 150
 151 ;;;    (sh eval sh-abbrevs shell
 152 ;;;     "case" 'sh-case
 153 ;;;     "function" 'sh-function
 154 ;;;     "until" 'sh-until
 155 ;;;     "getopts" 'sh-while-getopts)
 156
 157 ;;;    ;; The next entry is only used for defining the others
 158 ;;;    (shell "for" sh-for
 159 ;;;        "loop" sh-indexed-loop
 160 ;;;        "if" sh-if
 161 ;;;        "tmpfile" sh-tmp-file
 162 ;;;        "while" sh-while)
 163
 164 ;;;    (zsh eval sh-abbrevs ksh88
 165 ;;;      "repeat" 'sh-repeat))
 166 ;;;  "Abbrev-table used in Shell-Script mode.  See `sh-feature'.
 167 ;;;Due to the internal workings of abbrev tables, the shell name symbol is
 168 ;;;actually defined as the table for the like of \\[edit-abbrevs].")
 169
 170
 171
 172 (defvar sh-mode-syntax-table
 173   '((csh eval identity sh)
 174     (sh eval sh-mode-syntax-table ()
 175         ;; #'s meanings depend on context which can't be expressed here
 176         ;; ?\# "<"
 177         ;; ?\^l ">#"
 178         ;; ?\n ">#"
 179         ?\" "\"\""
 180         ?\' "\"'"
 181         ?\` ".`"
 182         ?$ "_"
 183         ?! "_"
 184         ?% "_"
 185         ?: "_"
 186         ?. "_"
 187         ?^ "_"
 188         ?~ "_")
 189     (rc eval sh-mode-syntax-table sh
 190         ?\" "_"
 191         ?\` "."))
 192   "Syntax-table used in Shell-Script mode.  See `sh-feature'.")
 193
 194
 195
 196 (defvar sh-mode-map
 197   (let ((map (make-sparse-keymap))
 198         (menu-map (make-sparse-keymap "Insert")))
 199     (define-key map "\C-c(" 'sh-function)
 200     (define-key map "\C-c\C-w" 'sh-while)
 201     (define-key map "\C-c\C-u" 'sh-until)
 202     (define-key map "\C-c\C-t" 'sh-tmp-file)
 203     (define-key map "\C-c\C-s" 'sh-select)
 204     (define-key map "\C-c\C-r" 'sh-repeat)
 205     (define-key map "\C-c\C-o" 'sh-while-getopts)
 206     (define-key map "\C-c\C-l" 'sh-indexed-loop)
 207     (define-key map "\C-c\C-i" 'sh-if)
 208     (define-key map "\C-c\C-f" 'sh-for)
 209     (define-key map "\C-c\C-c" 'sh-case)
 210
 211     (define-key map "=" 'sh-assignment)
 212     (define-key map "\C-c+" 'sh-add)
 213     (define-key map "\C-\M-x" 'sh-execute-region)
 214     (define-key map "\C-c\C-x" 'executable-interpret)
 215     (define-key map "<" 'sh-maybe-here-document)
 216     (define-key map "(" 'skeleton-pair-insert-maybe)
 217     (define-key map "{" 'skeleton-pair-insert-maybe)
 218     (define-key map "[" 'skeleton-pair-insert-maybe)
 219     (define-key map "'" 'skeleton-pair-insert-maybe)
 220     (define-key map "`" 'skeleton-pair-insert-maybe)
 221     (define-key map "\"" 'skeleton-pair-insert-maybe)
 222
 223     (define-key map "\t" 'sh-indent-line)
 224     (substitute-key-definition 'complete-tag 'comint-dynamic-complete
 225                                map (current-global-map))
 226     (substitute-key-definition 'newline-and-indent 'sh-newline-and-indent
 227                                map (current-global-map))
 228     (substitute-key-definition 'delete-backward-char
 229                                'backward-delete-char-untabify
 230                                map (current-global-map))
 231     (define-key map "\C-c:" 'sh-set-shell)
 232     (substitute-key-definition 'beginning-of-defun
 233                                'sh-beginning-of-compound-command
 234                                map (current-global-map))
 235     (substitute-key-definition 'backward-sentence 'sh-beginning-of-command
 236                                map (current-global-map))
 237     (substitute-key-definition 'forward-sentence 'sh-end-of-command
 238                                map (current-global-map))
 239     (define-key map [menu-bar insert] (cons "Insert" menu-map))
 240     (define-key menu-map [sh-while]     '("While Loop" . sh-while))
 241     (define-key menu-map [sh-until]     '("Until Loop" . sh-until))
 242     (define-key menu-map [sh-tmp-file]  '("Temporary File" . sh-tmp-file))
 243     (define-key menu-map [sh-select]    '("Select Statement" . sh-select))
 244     (define-key menu-map [sh-repeat]    '("Repeat Loop" . sh-repeat))
 245     (define-key menu-map [sh-while-getopts]
 246                                         '("Options Loop" . sh-while-getopts))
 247     (define-key menu-map [sh-indexed-loop]
 248                                         '("Indexed Loop" . sh-indexed-loop))
 249     (define-key menu-map [sh-if]        '("If Statement" . sh-if))
 250     (define-key menu-map [sh-for]       '("For Loop" . sh-for))
 251     (define-key menu-map [sh-case]      '("Case Statement" . sh-case))
 252     map)
 253   "Keymap used in Shell-Script mode.")
 254
 255
 256
 257 (defvar sh-dynamic-complete-functions
 258   '(shell-dynamic-complete-environment-variable
 259     shell-dynamic-complete-command
 260     comint-dynamic-complete-filename)
 261   "*Functions for doing TAB dynamic completion.")
 262
 263
 264 (defvar sh-require-final-newline
 265   '((csh . t)
 266     (pdksh . t)
 267     (rc eval . require-final-newline)
 268     (sh eval . require-final-newline))
 269   "*Value of `require-final-newline' in Shell-Script mode buffers.
 270 See `sh-feature'.")
 271
 272
 273 (defvar sh-comment-prefix
 274   '((csh . "\\(^\\|[^$]\\|\\$[^{]\\)")
 275     (rc eval identity csh)
 276     (sh . "\\(^\\|[ \t|&;()]\\)"))
 277   "*Regexp matching what may come before a comment `#'.
 278 This must contain one \\(grouping\\) since it is the basis for fontifying
 279 comments as well as for `comment-start-skip'.
 280 See `sh-feature'.")
 281
 282
 283 (defvar sh-assignment-regexp
 284   '((csh . "\\<\\([a-zA-Z0-9_]+\\)\\(\\[.+\\]\\)?[ \t]*[-+*/%^]?=")
 285     ;; actually spaces are only supported in let/(( ... ))
 286     (ksh88 . "\\<\\([a-zA-Z0-9_]+\\)\\(\\[.+\\]\\)?[ \t]*\\([-+*/%&|~^]\\|<<\\|>>\\)?=")
 287     (rc . "\\<\\([a-zA-Z0-9_*]+\\)[ \t]*=")
 288     (sh . "\\<\\([a-zA-Z0-9_]+\\)="))
 289   "*Regexp for the variable name and what may follow in an assignment.
 290 First grouping matches the variable name.  This is upto and including the `='
 291 sign.  See `sh-feature'.")
 292
 293
 294 (defvar sh-indentation 4
 295   "The width for further indentation in Shell-Script mode.")
 296
 297
 298 (defvar sh-remember-variable-min 3
 299   "*Don't remember variables less than this length for completing reads.")
 300
 301
 302 (defvar sh-header-marker nil
 303   "When non-`nil' is the end of header for prepending by \\[sh-execute-region].
 304 That command is also used for setting this variable.")
 305
 306
 307 (defvar sh-beginning-of-command
 308   "\\([;({`|&]\\|\\`\\|[^\\]\n\\)[ \t]*\\([/~a-zA-Z0-9:]\\)"
 309   "*Regexp to determine the beginning of a shell command.
 310 The actual command starts at the beginning of the second \\(grouping\\).")
 311
 312
 313 (defvar sh-end-of-command
 314   "\\([/~a-zA-Z0-9:]\\)[ \t]*\\([;#)}`|&]\\|$\\)"
 315   "*Regexp to determine the end of a shell command.
 316 The actual command ends at the end of the first \\(grouping\\).")
 317
 318
 319
 320 (defvar sh-here-document-word "EOF"
 321   "Word to delimit here documents.")
 322
 323 (defvar sh-test
 324   '((sh "[  ]" . 3)
 325     (ksh88 "[[  ]]" . 4))
 326   "Initial input in Bourne if, while and until skeletons.  See `sh-feature'.")
 327
 328
 329 (defvar sh-builtins
 330   '((bash eval sh-append posix
 331           "alias" "bg" "bind" "builtin" "declare" "dirs" "enable" "fc" "fg"
 332           "help" "history" "jobs" "kill" "let" "local" "popd" "pushd" "source"
 333           "suspend" "typeset" "unalias")
 334
 335     ;; The next entry is only used for defining the others
 336     (bourne eval sh-append shell
 337             "eval" "export" "getopts" "newgrp" "pwd" "read" "readonly"
 338             "times" "ulimit")
 339
 340     (csh eval sh-append shell
 341          "alias" "chdir" "glob" "history" "limit" "nice" "nohup" "rehash"
 342          "setenv" "source" "time" "unalias" "unhash")
 343
 344     (dtksh eval identity wksh)
 345
 346     (es "access" "apids" "cd" "echo" "eval" "false" "let" "limit" "local"
 347         "newpgrp" "result" "time" "umask" "var" "vars" "wait" "whatis")
 348
 349     (jsh eval sh-append sh
 350          "bg" "fg" "jobs" "kill" "stop" "suspend")
 351
 352     (jcsh eval sh-append csh
 353          "bg" "fg" "jobs" "kill" "notify" "stop" "suspend")
 354
 355     (ksh88 eval sh-append bourne
 356            "alias" "bg" "false" "fc" "fg" "jobs" "kill" "let" "print" "time"
 357            "typeset" "unalias" "whence")
 358
 359     (oash eval sh-append sh
 360           "checkwin" "dateline" "error" "form" "menu" "newwin" "oadeinit"
 361           "oaed" "oahelp" "oainit" "pp" "ppfile" "scan" "scrollok" "wattr"
 362           "wclear" "werase" "win" "wmclose" "wmmessage" "wmopen" "wmove"
 363           "wmtitle" "wrefresh")
 364
 365     (pdksh eval sh-append ksh88
 366            "bind")
 367
 368     (posix eval sh-append sh
 369            "command")
 370
 371     (rc "builtin" "cd" "echo" "eval" "limit" "newpgrp" "shift" "umask" "wait"
 372         "whatis")
 373
 374     (sh eval sh-append bourne
 375         "hash" "test" "type")
 376
 377     ;; The next entry is only used for defining the others
 378     (shell "cd" "echo" "eval" "set" "shift" "umask" "unset" "wait")
 379
 380     (wksh eval sh-append ksh88
 381           "Xt[A-Z][A-Za-z]*")
 382
 383     (zsh eval sh-append ksh88
 384          "autoload" "bindkey" "builtin" "chdir" "compctl" "declare" "dirs"
 385          "disable" "disown" "echotc" "enable" "functions" "getln" "hash"
 386          "history" "integer" "limit" "local" "log" "popd" "pushd" "r"
 387          "readonly" "rehash" "sched" "setopt" "source" "suspend" "true"
 388          "ttyctl" "type" "unfunction" "unhash" "unlimit" "unsetopt" "vared"
 389          "which"))
 390   "*List of all shell builtins for completing read and fontification.
 391 Note that on some systems not all builtins are available or some are
 392 implemented as aliases.  See `sh-feature'.")
 393
 394
 395
 396 (defvar sh-leading-keywords
 397   '((csh "else")
 398
 399     (es "true" "unwind-protect" "whatis")
 400
 401     (rc "else")
 402
 403     (sh "do" "elif" "else" "if" "then" "trap" "type" "until" "while"))
 404   "*List of keywords that may be immediately followed by a builtin or keyword.
 405 Given some confusion between keywords and builtins depending on shell and
 406 system, the distinction here has been based on whether they influence the
 407 flow of control or syntax.  See `sh-feature'.")
 408
 409
 410 (defvar sh-other-keywords
 411   '((bash eval sh-append bourne
 412           "bye" "logout")
 413
 414     ;; The next entry is only used for defining the others
 415     (bourne eval sh-append shell
 416             "done" "esac" "fi" "for" "function" "in" "return")
 417
 418     (csh eval sh-append shell
 419          "breaksw" "default" "end" "endif" "endsw" "foreach" "goto"
 420          "if" "logout" "onintr" "repeat" "switch" "then" "while")
 421
 422     (es "break" "catch" "exec" "exit" "fn" "for" "forever" "fork" "if"
 423         "return" "throw" "while")
 424
 425     (ksh88 eval sh-append bourne
 426            "select")
 427
 428     (rc "break" "case" "exec" "exit" "fn" "for" "if" "in" "return" "switch"
 429         "while")
 430
 431     ;; The next entry is only used for defining the others
 432     (shell "break" "case" "continue" "exec" "exit")
 433
 434     (zsh eval sh-append bash
 435          "select"))
 436   "*List of keywords not in `sh-leading-keywords'.
 437 See `sh-feature'.")
 438
 439
 440
 441 (defvar sh-variables
 442   '((bash eval sh-append sh
 443           "allow_null_glob_expansion" "auto_resume" "BASH" "BASH_VERSION"
 444           "cdable_vars" "ENV" "EUID" "FCEDIT" "FIGNORE" "glob_dot_filenames"
 445           "histchars" "HISTFILE" "HISTFILESIZE" "history_control" "HISTSIZE"
 446           "hostname_completion_file" "HOSTTYPE" "IGNOREEOF" "ignoreeof"
 447           "LINENO" "MAIL_WARNING" "noclobber" "nolinks" "notify"
 448           "no_exit_on_failed_exec" "NO_PROMPT_VARS" "OLDPWD" "OPTERR" "PPID"
 449           "PROMPT_COMMAND" "PS4" "pushd_silent" "PWD" "RANDOM" "REPLY"
 450           "SECONDS" "SHLVL" "TMOUT" "UID")
 451
 452     (csh eval sh-append shell
 453          "argv" "cdpath" "child" "echo" "histchars" "history" "home"
 454          "ignoreeof" "mail" "noclobber" "noglob" "nonomatch" "path" "prompt"
 455          "shell" "status" "time" "verbose")
 456
 457     (es eval sh-append shell
 458         "apid" "cdpath" "CDPATH" "history" "home" "ifs" "noexport" "path"
 459         "pid" "prompt" "signals")
 460
 461     (jcsh eval sh-append csh
 462          "notify")
 463
 464     (ksh88 eval sh-append sh
 465            "ENV" "ERRNO" "FCEDIT" "FPATH" "HISTFILE" "HISTSIZE" "LINENO"
 466            "OLDPWD" "PPID" "PS3" "PS4" "PWD" "RANDOM" "REPLY" "SECONDS"
 467            "TMOUT")
 468
 469     (oash eval sh-append sh
 470           "FIELD" "FIELD_MAX" "LAST_KEY" "OALIB" "PP_ITEM" "PP_NUM")
 471
 472     (rc eval sh-append shell
 473         "apid" "apids" "cdpath" "CDPATH" "history" "home" "ifs" "path" "pid"
 474         "prompt" "status")
 475
 476     (sh eval sh-append shell
 477         "CDPATH" "IFS" "OPTARG" "OPTIND" "PS1" "PS2")
 478
 479     ;; The next entry is only used for defining the others
 480     (shell "COLUMNS" "EDITOR" "HOME" "HUSHLOGIN" "LANG" "LC_COLLATE"
 481            "LC_CTYPE" "LC_MESSAGES" "LC_MONETARY" "LC_NUMERIC" "LC_TIME"
 482            "LINES" "LOGNAME" "MAIL" "MAILCHECK" "MAILPATH" "PAGER" "PATH"
 483            "SHELL" "TERM" "TERMCAP" "TERMINFO" "VISUAL")
 484
 485     (tcsh eval sh-append csh
 486           "addsuffix" "ampm" "autocorrect" "autoexpand" "autolist"
 487           "autologout" "chase_symlinks" "correct" "dextract" "edit" "el"
 488           "fignore" "gid" "histlit" "HOST" "HOSTTYPE" "HPATH"
 489           "ignore_symlinks" "listjobs" "listlinks" "listmax" "matchbeep"
 490           "nobeep" "NOREBIND" "oid" "printexitvalue" "prompt2" "prompt3"
 491           "pushdsilent" "pushdtohome" "recexact" "recognize_only_executables"
 492           "rmstar" "savehist" "SHLVL" "showdots" "sl" "SYSTYPE" "tcsh" "term"
 493           "tperiod" "tty" "uid" "version" "visiblebell" "watch" "who"
 494           "wordchars")
 495
 496     (zsh eval sh-append ksh88
 497          "BAUD" "bindcmds" "cdpath" "DIRSTACKSIZE" "fignore" "FIGNORE" "fpath"
 498          "HISTCHARS" "hostcmds" "hosts" "HOSTS" "LISTMAX" "LITHISTSIZE"
 499          "LOGCHECK" "mailpath" "manpath" "NULLCMD" "optcmds" "path" "POSTEDIT"
 500          "prompt" "PROMPT" "PROMPT2" "PROMPT3" "PROMPT4" "psvar" "PSVAR"
 501          "READNULLCMD" "REPORTTIME" "RPROMPT" "RPS1" "SAVEHIST" "SPROMPT"
 502          "STTY" "TIMEFMT" "TMOUT" "TMPPREFIX" "varcmds" "watch" "WATCH"
 503          "WATCHFMT" "WORDCHARS" "ZDOTDIR"))
 504   "List of all shell variables available for completing read.
 505 See `sh-feature'.")
 506
 507
 508
 509 (defvar sh-font-lock-keywords
 510   '((csh eval sh-append shell
 511          '("\\${?[#?]?\\([A-Za-z_][A-Za-z0-9_]*\\|0\\)" 1
 512            font-lock-variable-name-face))
 513
 514     (es eval sh-append executable-font-lock-keywords
 515         '("\\$#?\\([A-Za-z_][A-Za-z0-9_]*\\|[0-9]+\\)" 1
 516           font-lock-variable-name-face))
 517
 518     (rc eval identity es)
 519
 520     (sh eval sh-append shell
 521         '("\\$\\({#?\\)?\\([A-Za-z_][A-Za-z0-9_]*\\|[-#?@!]\\)" 2
 522           font-lock-variable-name-face))
 523
 524     ;; The next entry is only used for defining the others
 525     (shell eval sh-append executable-font-lock-keywords
 526            '("\\\\." 0 font-lock-string-face)
 527            '("\\${?\\([A-Za-z_][A-Za-z0-9_]*\\|[0-9]+\\|[$*_]\\)" 1
 528              font-lock-variable-name-face)))
 529   "*Rules for highlighting shell scripts.  See `sh-feature'.")
 530
 531 (defvar sh-font-lock-keywords-1
 532   '((sh "[ \t]in\\>"))
 533   "*Additional rules for highlighting shell scripts.  See `sh-feature'.")
 534
 535 (defvar sh-font-lock-keywords-2 ()
 536   "*Yet more rules for highlighting shell scripts.  See `sh-feature'.")
 537
 538 (defvar sh-font-lock-keywords-only t
 539   "*Value of `font-lock-keywords-only' for highlighting shell scripts.
 540 Default value is `t' because Emacs' syntax is not expressive enough to
 541 detect that $# does not start a comment.  Thus comments are fontified by
 542 regexp which means that a single apostrophe in a comment turns everything
 543 upto the next one or end of buffer into a string.")
 544 \f
 545 ;; mode-command and utility functions
 546
 547 ;;;###autoload
 548 (put 'sh-mode 'mode-class 'special)
 549 (defun sh-mode ()
 550   "Major mode for editing shell scripts.
 551 This mode works for many shells, since they all have roughly the same syntax,
 552 as far as commands, arguments, variables, pipes, comments etc. are concerned.
 553 Unless the file's magic number indicates the shell, your usual shell is
 554 assumed.  Since filenames rarely give a clue, they are not further analyzed.
 555
 556 This mode adapts to the variations between shells (see `sh-set-shell') by
 557 means of an inheritance based feature lookup (see `sh-feature').  This
 558 mechanism applies to all variables (including skeletons) that pertain to
 559 shell-specific features.
 560
 561 The default style of this mode is that of Rosenblatt's Korn shell book.
 562 The syntax of the statements varies with the shell being used.  The
 563 following commands are available, based on the current shell's syntax:
 564
 565 \\[sh-case]      case statement
 566 \\[sh-for]       for loop
 567 \\[sh-function]  function definition
 568 \\[sh-if]        if statement
 569 \\[sh-indexed-loop]      indexed loop from 1 to n
 570 \\[sh-while-getopts]     while getopts loop
 571 \\[sh-repeat]    repeat loop
 572 \\[sh-select]    select loop
 573 \\[sh-until]     until loop
 574 \\[sh-while]     while loop
 575
 576 \\[backward-delete-char-untabify]        Delete backward one position, even if it was a tab.
 577 \\[sh-newline-and-indent]        Delete unquoted space and indent new line same as this one.
 578 \\[sh-end-of-command]    Go to end of successive commands.
 579 \\[sh-beginning-of-command]      Go to beginning of successive commands.
 580 \\[sh-set-shell]         Set this buffer's shell, and maybe its magic number.
 581 \\[sh-execute-region]    Have optional header and region be executed in a subshell.
 582
 583 \\[sh-maybe-here-document]       Without prefix, following an unquoted < inserts here document.
 584 {, (, [, ', \", `
 585         Unless quoted with \\, insert the pairs {}, (), [], or '', \"\", ``.
 586
 587 If you generally program a shell different from your login shell you can
 588 set `sh-shell-file' accordingly.  If your shell's file name doesn't correctly
 589 indicate what shell it is use `sh-alias-alist' to translate.
 590
 591 If your shell gives error messages with line numbers, you can use \\[executable-interpret]
 592 with your script for an edit-interpret-debug cycle."
 593   (interactive)
 594   (kill-all-local-variables)
 595   (use-local-map sh-mode-map)
 596   (make-local-variable 'indent-line-function)
 597   (make-local-variable 'indent-region-function)
 598   (make-local-variable 'skeleton-end-hook)
 599   (make-local-variable 'paragraph-start)
 600   (make-local-variable 'paragraph-separate)
 601   (make-local-variable 'comment-start)
 602   (make-local-variable 'comment-start-skip)
 603   (make-local-variable 'require-final-newline)
 604   (make-local-variable 'sh-header-marker)
 605   (make-local-variable 'sh-shell-file)
 606   (make-local-variable 'sh-shell)
 607   (make-local-variable 'skeleton-pair-alist)
 608   (make-local-variable 'skeleton-pair-filter)
 609   (make-local-variable 'comint-dynamic-complete-functions)
 610   (make-local-variable 'comint-prompt-regexp)
 611   (make-local-variable 'font-lock-keywords)
 612   (make-local-variable 'font-lock-defaults)
 613   (make-local-variable 'skeleton-filter)
 614   (make-local-variable 'skeleton-newline-indent-rigidly)
 615   (setq major-mode 'sh-mode
 616         mode-name "Shell-script"
 617         indent-line-function 'sh-indent-line
 618         ;; not very clever, but enables wrapping skeletons around regions
 619         indent-region-function (lambda (b e)
 620                                  (save-excursion
 621                                    (goto-char b)
 622                                    (skip-syntax-backward "-")
 623                                    (setq b (point))
 624                                    (goto-char e)
 625                                    (skip-syntax-backward "-")
 626                                    (indent-rigidly b (point) sh-indentation)))
 627         skeleton-end-hook (lambda ()
 628                             (or (eolp) (newline) (indent-relative)))
 629         paragraph-start (concat page-delimiter "\\|$")
 630         paragraph-separate paragraph-start
 631         comment-start "# "
 632         comint-dynamic-complete-functions sh-dynamic-complete-functions
 633         ;; we can't look if previous line ended with `\'
 634         comint-prompt-regexp "^[ \t]*"
 635         font-lock-defaults
 636           `((sh-font-lock-keywords
 637              sh-font-lock-keywords-1
 638              sh-font-lock-keywords-2)
 639             ,sh-font-lock-keywords-only
 640             nil
 641             ((?/ . "w") (?~ . "w") (?. . "w") (?- . "w") (?_ . "w")))
 642         skeleton-pair-alist '((?` _ ?`))
 643         skeleton-pair-filter 'sh-quoted-p
 644         skeleton-further-elements '((< '(- (min sh-indentation
 645                                                 (current-column)))))
 646         skeleton-filter 'sh-feature
 647         skeleton-newline-indent-rigidly t)
 648   (save-excursion
 649     ;; parse or insert magic number for exec() and set all variables depending
 650     ;; on the shell thus determined
 651     (goto-char (point-min))
 652     (sh-set-shell
 653      (if (looking-at "#![\t ]*\\([^\t\n ]+\\)")
 654          (match-string 1)
 655        sh-shell-file)))
 656   (run-hooks 'sh-mode-hook))
 657 ;;;###autoload
 658 (defalias 'shell-script-mode 'sh-mode)
 659
 660
 661 (defun sh-font-lock-keywords (&optional keywords)
 662   "Function to get simple fontification based on `sh-font-lock-keywords'.
 663 This adds rules for comments and assignments."
 664   (sh-feature sh-font-lock-keywords
 665               (lambda (list)
 666                 `((,(concat (sh-feature sh-comment-prefix) "\\(#.*\\)")
 667                    2 font-lock-comment-face t)
 668                   (,(sh-feature sh-assignment-regexp)
 669                    1 font-lock-variable-name-face)
 670                   ,@keywords
 671                   ,@list))))
 672
 673 (defun sh-font-lock-keywords-1 (&optional builtins)
 674   "Function to get better fontification including keywords."
 675   (let ((keywords (concat "\\([;(){}`|&]\\|^\\)[ \t]*\\(\\(\\("
 676                           (mapconcat 'identity
 677                                      (sh-feature sh-leading-keywords)
 678                                      "\\|")
 679                           "\\)[ \t]+\\)?\\("
 680                           (mapconcat 'identity
 681                                      (append (sh-feature sh-leading-keywords)
 682                                              (sh-feature sh-other-keywords))
 683                                      "\\|")
 684                           "\\)")))
 685     (sh-font-lock-keywords
 686      `(,@(if builtins
 687              `((,(concat keywords "[ \t]+\\)?\\("
 688                          (mapconcat 'identity (sh-feature sh-builtins) "\\|")
 689                          "\\)\\>")
 690                 (2 font-lock-keyword-face nil t)
 691                 (6 font-lock-function-name-face))
 692                ,@(sh-feature sh-font-lock-keywords-2)))
 693          (,(concat keywords "\\)\\>")
 694           2 font-lock-keyword-face)
 695          ,@(sh-feature sh-font-lock-keywords-1)))))
 696
 697 (defun sh-font-lock-keywords-2 ()
 698   "Function to get better fontification including keywords and builtins."
 699   (sh-font-lock-keywords-1 t))
 700
 701
 702 (defun sh-set-shell (shell &optional no-query-flag insert-flag)
 703   "Set this buffer's shell to SHELL (a string).
 704 Makes this script executable via `executable-set-magic'.
 705 Calls the value of `sh-set-shell-hook' if set."
 706   (interactive (list (completing-read "Name or path of shell: "
 707                                       interpreter-mode-alist
 708                                       (lambda (x) (eq (cdr x) 'sh-mode)))
 709                      (eq executable-query 'function)
 710                      t))
 711   (setq sh-shell (intern (file-name-nondirectory shell))
 712         sh-shell (or (cdr (assq sh-shell sh-alias-alist))
 713                      sh-shell))
 714   (setq sh-shell-file (executable-set-magic shell (sh-feature sh-shell-arg)))
 715   (setq require-final-newline (sh-feature sh-require-final-newline)
 716 ;;;     local-abbrev-table (sh-feature sh-abbrevs)
 717         font-lock-keywords nil          ; force resetting
 718         font-lock-syntax-table nil
 719         comment-start-skip (concat (sh-feature sh-comment-prefix) "#+[\t ]*")
 720         mode-line-process (format "[%s]" sh-shell)
 721         sh-shell-variables nil
 722         shell (sh-feature sh-variables))
 723   (set-syntax-table (sh-feature sh-mode-syntax-table))
 724   (save-excursion
 725     (while (search-forward "=" nil t)
 726       (sh-assignment 0)))
 727   (while shell
 728     (sh-remember-variable (car shell))
 729     (setq shell (cdr shell)))
 730   (and (boundp 'font-lock-mode)
 731        font-lock-mode
 732        (font-lock-mode (font-lock-mode 0)))
 733   (run-hooks 'sh-set-shell-hook))
 734
 735
 736
 737 (defun sh-feature (list &optional function)
 738   "Index ALIST by the current shell.
 739 If ALIST isn't a list where every element is a cons, it is returned as is.
 740 Else indexing follows an inheritance logic which works in two ways:
 741
 742   - Fall back on successive ancestors (see `sh-ancestor-alist') as long as
 743     the alist contains no value for the current shell.
 744
 745   - If the value thus looked up is a list starting with `eval' its `cdr' is
 746     first evaluated.  If that is also a list and the first argument is a
 747     symbol in ALIST it is not evaluated, but rather recursively looked up in
 748     ALIST to allow the function called to define the value for one shell to be
 749     derived from another shell.  While calling the function, is the car of the
 750     alist element is the current shell.
 751     The value thus determined is physically replaced into the alist.
 752
 753 Optional FUNCTION is applied to the determined value and the result is cached
 754 in ALIST."
 755   (or (if (consp list)
 756           (let ((l list))
 757             (while (and l (consp (car l)))
 758               (setq l (cdr l)))
 759             (if l list)))
 760       (if function
 761           (cdr (assoc (setq function (cons sh-shell function)) list)))
 762       (let ((sh-shell sh-shell)
 763             elt val)
 764         (while (and sh-shell
 765                     (not (setq elt (assq sh-shell list))))
 766           (setq sh-shell (cdr (assq sh-shell sh-ancestor-alist))))
 767         (if (and (consp (setq val (cdr elt)))
 768                  (eq (car val) 'eval))
 769             (setcdr elt
 770                     (setq val
 771                           (eval (if (consp (setq val (cdr val)))
 772                                     (let ((sh-shell (car (cdr val)))
 773                                           function)
 774                                       (if (assq sh-shell list)
 775                                           (setcar (cdr val)
 776                                                   (list 'quote
 777                                                         (sh-feature list))))
 778                                       val)
 779                                   val)))))
 780         (if function
 781             (nconc list
 782                    (list (cons function
 783                                (setq sh-shell (car function)
 784                                      val (funcall (cdr function) val))))))
 785         val)))
 786
 787
 788
 789 ;;; I commented this out because nobody calls it -- rms.
 790 ;;;(defun sh-abbrevs (ancestor &rest list)
 791 ;;;  "Iff it isn't, define the current shell as abbrev table and fill that.
 792 ;;;Abbrev table will inherit all abbrevs from ANCESTOR, which is either an abbrev
 793 ;;;table or a list of (NAME1 EXPANSION1 ...).  In addition it will define abbrevs
 794 ;;;according to the remaining arguments NAMEi EXPANSIONi ...
 795 ;;;EXPANSION may be either a string or a skeleton command."
 796 ;;;  (or (if (boundp sh-shell)
 797 ;;;       (symbol-value sh-shell))
 798 ;;;      (progn
 799 ;;;     (if (listp ancestor)
 800 ;;;         (nconc list ancestor))
 801 ;;;     (define-abbrev-table sh-shell ())
 802 ;;;     (if (vectorp ancestor)
 803 ;;;         (mapatoms (lambda (atom)
 804 ;;;                     (or (eq atom 0)
 805 ;;;                         (define-abbrev (symbol-value sh-shell)
 806 ;;;                           (symbol-name atom)
 807 ;;;                           (symbol-value atom)
 808 ;;;                           (symbol-function atom))))
 809 ;;;                   ancestor))
 810 ;;;     (while list
 811 ;;;       (define-abbrev (symbol-value sh-shell)
 812 ;;;         (car list)
 813 ;;;         (if (stringp (car (cdr list)))
 814 ;;;             (car (cdr list))
 815 ;;;           "")
 816 ;;;         (if (symbolp (car (cdr list)))
 817 ;;;             (car (cdr list))))
 818 ;;;       (setq list (cdr (cdr list)))))
 819 ;;;      (symbol-value sh-shell)))
 820
 821
 822 (defun sh-mode-syntax-table (table &rest list)
 823   "Copy TABLE and set syntax for successive CHARs according to strings S."
 824   (setq table (copy-syntax-table table))
 825   (while list
 826     (modify-syntax-entry (car list) (car (cdr list)) table)
 827     (setq list (cdr (cdr list))))
 828   table)
 829
 830
 831 (defun sh-append (ancestor &rest list)
 832   "Return list composed of first argument (a list) physically appended to rest."
 833   (nconc list ancestor))
 834
 835
 836 (defun sh-modify (skeleton &rest list)
 837   "Modify a copy of SKELETON by replacing I1 with REPL1, I2 with REPL2 ..."
 838   (setq skeleton (copy-sequence skeleton))
 839   (while list
 840     (setcar (or (nthcdr (car list) skeleton)
 841                 (error "Index %d out of bounds" (car list)))
 842             (car (cdr list)))
 843     (setq list (nthcdr 2 list)))
 844   skeleton)
 845
 846
 847 (defun sh-indent-line ()
 848   "Indent as far as preceding non-empty line, then by steps of `sh-indentation'.
 849 Lines containing only comments are considered empty."
 850   (interactive)
 851   (let ((previous (save-excursion
 852                     (while (and (not (bobp))
 853                                 (progn
 854                                   (forward-line -1)
 855                                   (back-to-indentation)
 856                                   (or (eolp)
 857                                       (eq (following-char) ?#)))))
 858                     (current-column)))
 859         current)
 860     (save-excursion
 861       (indent-to (if (eq this-command 'newline-and-indent)
 862                      previous
 863                    (if (< (current-column)
 864                           (setq current (progn (back-to-indentation)
 865                                                (current-column))))
 866                        (if (eolp) previous 0)
 867                      (delete-region (point)
 868                                     (progn (beginning-of-line) (point)))
 869                      (if (eolp)
 870                          (max previous (* (1+ (/ current sh-indentation))
 871                                           sh-indentation))
 872                        (* (1+ (/ current sh-indentation)) sh-indentation))))))
 873     (if (< (current-column) (current-indentation))
 874         (skip-chars-forward " \t"))))
 875
 876
 877 (defun sh-execute-region (start end &optional flag)
 878   "Pass optional header and region to a subshell for noninteractive execution.
 879 The working directory is that of the buffer, and only environment variables
 880 are already set which is why you can mark a header within the script.
 881
 882 With a positive prefix ARG, instead of sending region, define header from
 883 beginning of buffer to point.  With a negative prefix ARG, instead of sending
 884 region, clear header."
 885   (interactive "r\nP")
 886   (if flag
 887       (setq sh-header-marker (if (> (prefix-numeric-value flag) 0)
 888                                  (point-marker)))
 889     (if sh-header-marker
 890         (save-excursion
 891           (let (buffer-undo-list)
 892             (goto-char sh-header-marker)
 893             (append-to-buffer (current-buffer) start end)
 894             (shell-command-on-region (point-min)
 895                                      (setq end (+ sh-header-marker
 896                                                   (- end start)))
 897                                      sh-shell-file)
 898             (delete-region sh-header-marker end)))
 899       (shell-command-on-region start end (concat sh-shell-file " -")))))
 900
 901
 902 (defun sh-remember-variable (var)
 903   "Make VARIABLE available for future completing reads in this buffer."
 904   (or (< (length var) sh-remember-variable-min)
 905       (getenv var)
 906       (assoc var sh-shell-variables)
 907       (setq sh-shell-variables (cons (cons var var) sh-shell-variables)))
 908   var)
 909
 910
 911
 912 (defun sh-quoted-p ()
 913   "Is point preceded by an odd number of backslashes?"
 914   (eq -1 (% (save-excursion (skip-chars-backward "\\\\")) 2)))
 915 \f
 916 ;; statement syntax-commands for various shells
 917
 918 ;; You are welcome to add the syntax or even completely new statements as
 919 ;; appropriate for your favorite shell.
 920
 921 (define-skeleton sh-case
 922   "Insert a case/switch statement.  See `sh-feature'."
 923   (csh "expression: "
 924        "switch( " str " )" \n
 925        > "case " (read-string "pattern: ") ?: \n
 926        > _ \n
 927        "breaksw" \n
 928        ( "other pattern, %s: "
 929          < "case " str ?: \n
 930          > _ \n
 931          "breaksw" \n)
 932        < "default:" \n
 933        > _ \n
 934        resume:
 935        < < "endsw")
 936   (es)
 937   (rc "expression: "
 938       "switch( " str " ) {" \n
 939       > "case " (read-string "pattern: ") \n
 940       > _ \n
 941       ( "other pattern, %s: "
 942         < "case " str \n
 943         > _ \n)
 944       < "case *" \n
 945       > _ \n
 946       resume:
 947       < < ?})
 948   (sh "expression: "
 949       "case " str " in" \n
 950       > (read-string "pattern: ") ?\) \n
 951       > _ \n
 952       ";;" \n
 953       ( "other pattern, %s: "
 954         < str ?\) \n
 955         > _ \n
 956         ";;" \n)
 957       < "*)" \n
 958       > _ \n
 959       resume:
 960       < < "esac"))
 961 (put 'sh-case 'menu-enable '(sh-feature sh-case))
 962
 963
 964
 965 (define-skeleton sh-for
 966   "Insert a for loop.  See `sh-feature'."
 967   (csh eval sh-modify sh
 968        1 "foreach "
 969        3 " ( "
 970        5 " )"
 971        15 "end")
 972   (es eval sh-modify rc
 973       3 " = ")
 974   (rc eval sh-modify sh
 975       1 "for( "
 976       5 " ) {"
 977       15 ?})
 978   (sh "Index variable: "
 979       "for " str " in " _ "; do" \n
 980       > _ | ?$ & (sh-remember-variable str) \n
 981       < "done"))
 982
 983
 984
 985 (define-skeleton sh-indexed-loop
 986   "Insert an indexed loop from 1 to n.  See `sh-feature'."
 987   (bash eval identity posix)
 988   (csh "Index variable: "
 989        "@ " str " = 1" \n
 990        "while( $" str " <= " (read-string "upper limit: ") " )" \n
 991        > _ ?$ str \n
 992        "@ " str "++" \n
 993        < "end")
 994   (es eval sh-modify rc
 995       3 " =")
 996   (ksh88 "Index variable: "
 997          "integer " str "=0" \n
 998          "while (( ( " str " += 1 ) <= "
 999          (read-string "upper limit: ")
1000          " )); do" \n
1001          > _ ?$ (sh-remember-variable str) \n
1002          < "done")
1003   (posix "Index variable: "
1004          str "=1" \n
1005          "while [ $" str " -le "
1006          (read-string "upper limit: ")
1007          " ]; do" \n
1008          > _ ?$ str \n
1009          str ?= (sh-add (sh-remember-variable str) 1) \n
1010          < "done")
1011   (rc "Index variable: "
1012       "for( " str " in" " `{awk 'BEGIN { for( i=1; i<="
1013       (read-string "upper limit: ")
1014       "; i++ ) print i }'}) {" \n
1015       > _ ?$ (sh-remember-variable str) \n
1016       < ?})
1017   (sh "Index variable: "
1018       "for " str " in `awk 'BEGIN { for( i=1; i<="
1019       (read-string "upper limit: ")
1020       "; i++ ) print i }'`; do" \n
1021       > _ ?$ (sh-remember-variable str) \n
1022       < "done"))
1023
1024
1025 (defun sh-add (var delta)
1026   "Insert an addition of VAR and prefix DELTA for Bourne (type) shell."
1027   (interactive
1028    (list (completing-read "Variable: "
1029                           (nconc (mapcar (lambda (var)
1030                                            (let ((name
1031                                                   (substring var 0 (string-match "=" var))))
1032                                              (cons name name)))
1033                                          process-environment)
1034                                  sh-shell-variables))
1035          (prefix-numeric-value current-prefix-arg)))
1036   (insert (sh-feature '((bash . "$[ ")
1037                         (ksh88 . "$(( ")
1038                         (posix . "$(( ")
1039                         (rc . "`{expr $")
1040                         (sh . "`expr $")
1041                         (zsh . "$[ ")))
1042           (sh-remember-variable var)
1043           (if (< delta 0) " - " " + ")
1044           (number-to-string (abs delta))
1045           (sh-feature '((bash . " ]")
1046                         (ksh88 . " ))")
1047                         (posix . " ))")
1048                         (rc . "}")
1049                         (sh . "`")
1050                         (zsh . " ]")))))
1051
1052
1053
1054 (define-skeleton sh-function
1055   "Insert a function definition.  See `sh-feature'."
1056   (bash eval sh-modify ksh88
1057         3 "() {")
1058   (ksh88 "name: "
1059          "function " str " {" \n
1060          > _ \n
1061          < "}")
1062   (rc eval sh-modify ksh88
1063         1 "fn ")
1064   (sh ()
1065       "() {" \n
1066       > _ \n
1067       < "}"))
1068
1069
1070
1071 (define-skeleton sh-if
1072   "Insert an if statement.  See `sh-feature'."
1073   (csh "condition: "
1074        "if( " str " ) then" \n
1075        > _ \n
1076        ( "other condition, %s: "
1077          < "else if( " str " ) then" \n
1078          > _ \n)
1079        < "else" \n
1080        > _ \n
1081        resume:
1082        < "endif")
1083   (es "condition: "
1084       "if { " str " } {" \n
1085        > _ \n
1086        ( "other condition, %s: "
1087          < "} { " str " } {" \n
1088          > _ \n)
1089        < "} {" \n
1090        > _ \n
1091        resume:
1092        < ?})
1093   (rc eval sh-modify csh
1094       3 " ) {"
1095       8 '( "other condition, %s: "
1096            < "} else if( " str " ) {" \n
1097            > _ \n)
1098       10 "} else {"
1099       17 ?})
1100   (sh "condition: "
1101       '(setq input (sh-feature sh-test))
1102       "if " str "; then" \n
1103       > _ \n
1104       ( "other condition, %s: "
1105         < "elif " str "; then" \n
1106         > _ \n)
1107       < "else" \n
1108       > _ \n
1109       resume:
1110       < "fi"))
1111
1112
1113
1114 (define-skeleton sh-repeat
1115   "Insert a repeat loop definition.  See `sh-feature'."
1116   (es nil
1117       "forever {" \n
1118       > _ \n
1119       < ?})
1120   (zsh "factor: "
1121       "repeat " str "; do"\n
1122       > _ \n
1123       < "done"))
1124 (put 'sh-repeat 'menu-enable '(sh-feature sh-repeat))
1125
1126
1127
1128 (define-skeleton sh-select
1129   "Insert a select statement.  See `sh-feature'."
1130   (ksh88 "Index variable: "
1131          "select " str " in " _ "; do" \n
1132          > ?$ str \n
1133          < "done"))
1134 (put 'sh-select 'menu-enable '(sh-feature sh-select))
1135
1136
1137
1138 (define-skeleton sh-tmp-file
1139   "Insert code to setup temporary file handling.  See `sh-feature'."
1140   (bash eval identity ksh88)
1141   (csh (file-name-nondirectory (buffer-file-name))
1142        "set tmp = /tmp/" str ".$$" \n
1143        "onintr exit" \n _
1144        (and (goto-char (point-max))
1145             (not (bolp))
1146             ?\n)
1147        "exit:\n"
1148        "rm $tmp* >&/dev/null" >)
1149   (es (file-name-nondirectory (buffer-file-name))
1150       "local( signals = $signals sighup sigint; tmp = /tmp/" str ".$pid ) {" \n
1151       > "catch @ e {" \n
1152       > "rm $tmp^* >[2]/dev/null" \n
1153       "throw $e" \n
1154       < "} {" \n
1155       > _ \n
1156       < ?} \n
1157       < ?})
1158   (ksh88 eval sh-modify sh
1159          6 "EXIT")
1160   (rc (file-name-nondirectory (buffer-file-name))
1161        "tmp = /tmp/" str ".$pid" \n
1162        "fn sigexit { rm $tmp^* >[2]/dev/null }")
1163   (sh (file-name-nondirectory (buffer-file-name))
1164       "TMP=/tmp/" str ".$$" \n
1165       "trap \"rm $TMP* 2>/dev/null\" " ?0))
1166
1167
1168
1169 (define-skeleton sh-until
1170   "Insert an until loop.  See `sh-feature'."
1171   (sh "condition: "
1172       '(setq input (sh-feature sh-test))
1173       "until " str "; do" \n
1174       > _ \n
1175       < "done"))
1176 (put 'sh-until 'menu-enable '(sh-feature sh-until))
1177
1178
1179
1180 (define-skeleton sh-while
1181   "Insert a while loop.  See `sh-feature'."
1182   (csh eval sh-modify sh
1183        2 "while( "
1184        4 " )"
1185        10 "end")
1186   (es eval sh-modify rc
1187       2 "while { "
1188       4 " } {")
1189   (rc eval sh-modify csh
1190       4 " ) {"
1191       10 ?})
1192   (sh "condition: "
1193       '(setq input (sh-feature sh-test))
1194       "while " str "; do" \n
1195       > _ \n
1196       < "done"))
1197
1198
1199
1200 (define-skeleton sh-while-getopts
1201   "Insert a while getopts loop.  See `sh-feature'.
1202 Prompts for an options string which consists of letters for each recognized
1203 option followed by a colon `:' if the option accepts an argument."
1204   (bash eval sh-modify sh
1205         18 "${0##*/}")
1206   (csh nil
1207        "while( 1 )" \n
1208        > "switch( \"$1\" )" \n
1209        '(setq input '("- x" . 2))
1210        > >
1211        ( "option, %s: "
1212          < "case " '(eval str)
1213          '(if (string-match " +" str)
1214               (setq v1 (substring str (match-end 0))
1215                     str (substring str 0 (match-beginning 0)))
1216             (setq v1 nil))
1217          str ?: \n
1218          > "set " v1 & " = $2" | -4 & _ \n
1219          (if v1 "shift") & \n
1220          "breaksw" \n)
1221        < "case --:" \n
1222        > "shift" \n
1223        < "default:" \n
1224        > "break" \n
1225        resume:
1226        < < "endsw" \n
1227        "shift" \n
1228        < "end")
1229   (ksh88 eval sh-modify sh
1230          16 "print"
1231          18 "${0##*/}"
1232          36 "OPTIND-1")
1233   (posix eval sh-modify sh
1234          18 "$(basename $0)")
1235   (sh "optstring: "
1236       "while getopts :" str " OPT; do" \n
1237       > "case $OPT in" \n
1238       > >
1239       '(setq v1 (append (vconcat str) nil))
1240       ( (prog1 (if v1 (char-to-string (car v1)))
1241           (if (eq (nth 1 v1) ?:)
1242               (setq v1 (nthcdr 2 v1)
1243                     v2 "\"$OPTARG\"")
1244             (setq v1 (cdr v1)
1245                   v2 nil)))
1246         < str "|+" str ?\) \n
1247         > _ v2 \n
1248         ";;" \n)
1249       < "*)" \n
1250       > "echo" " \"usage: " "`basename $0`"
1251       "[ +-" '(setq v1 (point)) str
1252       '(save-excursion
1253          (while (search-backward ":" v1 t)
1254            (replace-match " arg][ +-" t t)))
1255       (if (eq (preceding-char) ?-) -5)
1256       "][ --] args\"" \n
1257       "exit 2" \n
1258       < < "esac" \n
1259       < "done" \n
1260       "shift " (sh-add "OPTIND" -1)))
1261 (put 'sh-while-getopts 'menu-enable '(sh-feature sh-while-getopts))
1262
1263
1264
1265 (defun sh-assignment (arg)
1266   "Remember preceding identifier for future completion and do self-insert."
1267   (interactive "p")
1268   (self-insert-command arg)
1269   (if (<= arg 1)
1270       (sh-remember-variable
1271        (save-excursion
1272          (if (re-search-forward (sh-feature sh-assignment-regexp)
1273                                 (prog1 (point)
1274                                   (beginning-of-line 1))
1275                                 t)
1276              (match-string 1))))))
1277
1278
1279
1280 (defun sh-maybe-here-document (arg)
1281   "Inserts self.  Without prefix, following unquoted `<' inserts here document.
1282 The document is bounded by `sh-here-document-word'."
1283   (interactive "*P")
1284   (self-insert-command (prefix-numeric-value arg))
1285   (or arg
1286       (not (eq (char-after (- (point) 2)) last-command-char))
1287       (save-excursion
1288         (backward-char 2)
1289         (sh-quoted-p))
1290       (progn
1291         (insert sh-here-document-word)
1292         (or (eolp) (looking-at "[ \t]") (insert ? ))
1293         (end-of-line 1)
1294         (while
1295             (sh-quoted-p)
1296           (end-of-line 2))
1297         (newline)
1298         (save-excursion (insert ?\n sh-here-document-word)))))
1299
1300 \f
1301 ;; various other commands
1302
1303 (autoload 'comint-dynamic-complete "comint"
1304   "Dynamically perform completion at point." t)
1305
1306 (autoload 'shell-dynamic-complete-command "shell"
1307   "Dynamically complete the command at point." t)
1308
1309 (autoload 'comint-dynamic-complete-filename "comint"
1310   "Dynamically complete the filename at point." t)
1311
1312 (autoload 'shell-dynamic-complete-environment-variable "shell"
1313   "Dynamically complete the environment variable at point." t)
1314
1315
1316
1317 (defun sh-newline-and-indent ()
1318   "Strip unquoted whitespace, insert newline, and indent like current line."
1319   (interactive "*")
1320   (indent-to (prog1 (current-indentation)
1321                (delete-region (point)
1322                               (progn
1323                                 (or (zerop (skip-chars-backward " \t"))
1324                                     (if (sh-quoted-p)
1325                                         (forward-char)))
1326                                 (point)))
1327                (newline))))
1328
1329
1330
1331 (defun sh-beginning-of-command ()
1332   "Move point to successive beginnings of commands."
1333   (interactive)
1334   (if (re-search-backward sh-beginning-of-command nil t)
1335       (goto-char (match-beginning 2))))
1336
1337
1338 (defun sh-end-of-command ()
1339   "Move point to successive ends of commands."
1340   (interactive)
1341   (if (re-search-forward sh-end-of-command nil t)
1342       (goto-char (match-end 1))))
1343
1344 (provide 'sh-script)
1345 ;; sh-script.el ends here