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+;;
+;; Copyright (c) 2003 by The XFree86 Project, Inc.
+;;
+;; Permission is hereby granted, free of charge, to any person obtaining a
+;; copy of this software and associated documentation files (the "Software"),
+;; to deal in the Software without restriction, including without limitation
+;; the rights to use, copy, modify, merge, publish, distribute, sublicense,
+;; and/or sell copies of the Software, and to permit persons to whom the
+;; Software is furnished to do so, subject to the following conditions:
+;;
+;; The above copyright notice and this permission notice shall be included in
+;; all copies or substantial portions of the Software.
+;;
+;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+;; THE XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+;; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+;; OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+;; SOFTWARE.
+;;
+;; Except as contained in this notice, the name of the XFree86 Project shall
+;; not be used in advertising or otherwise to promote the sale, use or other
+;; dealings in this Software without prior written authorization from the
+;; XFree86 Project.
+;;
+;; Author: Paulo César Pereira de Andrade
+;;
+;;
+;; $XFree86: xc/programs/xedit/lisp/modules/progmodes/sh.lsp,v 1.1 2003/01/16 03:50:46 paulo Exp $
+;;
+
+(require "syntax")
+(require "indent")
+(in-package "XEDIT")
+
+(defsynprop *prop-escape*
+    "escape"
+    :font	"*lucidatypewriter-medium-r*12*"
+    :foreground	"Red3")
+
+(defsynprop *prop-variable*
+    "variable"
+    :font	"*lucidatypewriter-medium-r*12*"
+    :foreground	"Gold4")
+
+(defsynprop *prop-backslash*
+    "backslash"
+    :font	"*courier-bold-r*12*"
+    :foreground	"green4")
+
+;; XXX it would be interesting if "here-documents" could be parsed
+;; just searching for "<<\s*EOF\\>" and then for "^EOF\\>" should
+;; handle most cases, but would be a hack...
+(defsyntax *sh-mode* :main nil #'default-indent nil
+    ;; keywords and common commands/builtins
+    (syntoken "\\<(if|then|elif|else|fi|case|in|esac|for|do|done|while|until|break|continue|eval|exit|exec|test|echo|cd|shift|local|return)\\>"
+	:property *prop-keyword*)
+
+    ; comments
+    (syntoken "#.*$" :property *prop-comment*)
+
+    ;; punctuation
+    (syntoken "[][;:*?(){}<>&!|$#]+" :property *prop-punctuation*)
+
+    ;; variable declaration
+    (syntoken "\\w+=" :property *prop-preprocessor*)
+
+    ;; numbers
+    (syntoken "\\<\\d+\\>" :property *prop-number*)
+
+    ;; escaped characters at toplevel
+    (syntoken "\\\\." :property *prop-backslash*)
+
+    ;; single quote
+    (syntoken "'" :nospec t :contained t :begin :single)
+    (syntable :single *prop-constant* nil
+	;; do nothing, escaped characters
+	(syntoken "\\\\.")
+	(syntoken "'" :nospec t :switch -1)
+    )
+
+    ;; double quote
+    (syntoken "\"" :nospec t :contained t :begin :double)
+    (syntable :double *prop-string* #'default-indent
+	;; escaped characters
+	(syntoken "\\\\." :property *prop-backslash*)
+	(syntoken "\"" :nospec t :switch -1)
+	;; rule to start escape
+	(syntoken "`" :nospec t :contained t :begin :escape)
+	;; ignore single quote, required because escape is augmented
+	(syntoken "'" :nospec t)
+	(synaugment :escape :variable)
+    )
+
+    ;; escaped commands
+    (syntoken "`" :nospec t :contained t :begin :escape)
+    (syntable :escape *prop-escape* #'default-indent
+	;; escaped characters
+	(syntoken "\\\\." :property *prop-backslash*)
+	(syntoken "`" :nospec t :switch -1)
+	;; rule to start double quote inside escape
+	(syntoken "\"" :nospec t :contained t :begin :double)
+	;; rule to start single quote
+	(syntoken "'" :nospec t :contained t :begin :single)
+	(synaugment :double :variable)
+    )
+
+    (syntable :variable nil nil
+	(syntoken "\\$\\w+" :property *prop-variable*)
+    )
+    (synaugment :variable)
+)