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authorSergey Poznyakoff <gray@gnu.org.ua>2015-10-21 14:30:31 (GMT)
committer Sergey Poznyakoff <gray@gnu.org.ua>2015-10-21 15:41:51 (GMT)
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+;;; vcl-mode.el --- major mode for editing VCL sources
+
+;; Authors: 2015 Sergey Poznyakoff
+;; Version: 0.1
+;; Keywords: Varnish, VCL
+
+;; Copyright (C) 2015 Sergey Poznyakoff
+
+;; This program 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 3 of the License, or
+;; (at your option) any later version.
+
+;; This program 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
+;; along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+;; Installation:
+;; You may wish to use precompiled version of the mode. To create it
+;; run:
+;; emacs -batch -f batch-byte-compile vcl-mode.el
+;; Install the file vcl-mode.elc (and, optionally, vcl-mode.el) to
+;; any directory in your Emacs load-path.
+
+;; Customization:
+;; To your .emacs or site-start.el add:
+;; (autoload 'vcl-mode "vcl-mode")
+
+(require 'cc-langs)
+
+(defvar vcl-mode-map ()
+ "Keymap used in vcl-mode buffers.")
+(if vcl-mode-map
+ nil
+ (setq vcl-mode-map (c-make-inherited-keymap)))
+
+(defvar vcl-mode-syntax-table
+ (let ((st (make-syntax-table)))
+ (modify-syntax-entry ?\n "> b" st)
+ (modify-syntax-entry ?\r "> " st)
+ (modify-syntax-entry ?\f "> " st)
+; (modify-syntax-entry ?\# "<" st)
+ (modify-syntax-entry ?/ ". 124b" st)
+ (modify-syntax-entry ?* ". 23" st)
+ (modify-syntax-entry ?+ "." st)
+ (modify-syntax-entry ?- "." st)
+ (modify-syntax-entry ?~ "." st)
+ (modify-syntax-entry ?= "." st)
+ (modify-syntax-entry ?% "." st)
+ (modify-syntax-entry ?< "." st)
+ (modify-syntax-entry ?> "." st)
+ (modify-syntax-entry ?& "." st)
+ (modify-syntax-entry ?| "." st)
+ (modify-syntax-entry ?_ "_" st)
+ (modify-syntax-entry ?\' "." st)
+ (modify-syntax-entry ?\" "." st)
+ (modify-syntax-entry ?{ "." st)
+ (modify-syntax-entry ?} "." st)
+ st)
+ "Syntax table in use in VCL Mode buffers.")
+
+(defvar vcl-mode-abbrev-table nil
+ "Abbreviation table used in vcl-mode buffers.")
+(c-define-abbrev-table 'vcl-mode-abbrev-table
+ '(("else" "else" c-electric-continued-statement 0)
+ ("while" "while" c-electric-continued-statement 0)))
+
+;; Font locking
+(defconst vcl-font-lock-keywords-1
+ (eval-when-compile
+ (list
+ ;; Version declaration
+ '("^[ \t]*\\(vcl\\)\\>[ \t]*\\([[:digit:]]+\\.[[:digit:]]+\\)"
+ (1 font-lock-keyword-face) (2 font-lock-constant-face nil t))
+ ;; Built-ins
+ (cons
+ (concat "\\<"
+ (regexp-opt
+ '("vcl_init"
+ "vcl_recv"
+ "vcl_pipe"
+ "vcl_pass"
+ "vcl_hash"
+ "vcl_hit"
+ "vcl_miss"
+ "vcl_fetch"
+ "vcl_deliver"
+ "vcl_error"
+ "vcl_fini"
+ "vcl_synth"
+ "vcl_backend_fetch"
+ "vcl_backend_response"
+ "vcl_backend_error") t)
+ "\\>")
+ 'font-lock-builtin-face)
+ ;; Keywords
+ (cons
+ (concat "\\<"
+ (regexp-opt
+ '("sub"
+ "import"
+ "include"
+ "backend"))
+ "\\>")
+ 'font-lock-keyword-face)
+ ))
+ "Subdued level highlighting for VCL buffers.")
+
+(defconst vcl-font-lock-keywords-2
+ (append vcl-font-lock-keywords-1
+ (eval-when-compile
+ (list
+ ;; Keywords
+ (cons
+ (concat "\\<"
+ (regexp-opt
+ '("acl"
+ "if"
+ "else"
+ "return"
+ "call"
+ "set"
+ "remove"
+ "unset"
+ "director"
+ "probe") t)
+ "\\>")
+ 'font-lock-keyword-face)
+ ;; Return values
+ (cons
+ (concat "\\<"
+ (regexp-opt
+ '("error"
+ "fetch"
+ "hash"
+ "hit_for_pass"
+ "lookup"
+ "ok"
+ "pass"
+ "pipe"
+ "deliver"
+ "restart"
+ "true"
+ "false") t)
+ "\\>")
+ 'font-lock-constant-face)
+ ;; Functions
+ (cons
+ (concat "\\<"
+ (regexp-opt
+ '("ban"
+ "call"
+ "hash_data"
+ "new"
+ "synth"
+ "synthetic"
+ "regsub"
+ "regsuball") t)
+ "\\>")
+ 'font-lock-function-name-face)
+
+ ;; Objects and variables
+ ;; See https://www.varnish-cache.org/docs/4.0/reference/vcl.html#variables
+ (list (concat "\\<"
+ (regexp-opt
+ '("req"
+ "resp"
+ "bereq"
+ "beresp"
+ "obj") t)
+ "\\.\\(http\\)\\(\\.\\([a-zA-Z_-][a-zA-Z_0-9-]*\\)\\)?")
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-builtin-face)
+ '(4 font-lock-string-face nil t))
+ (list (concat "\\<\\(bereq\\)\\."
+ (regexp-opt
+ '("backend"
+ "between_bytes_timeout"
+ "connect_timeout"
+ "first_byte_timeout"
+ "method"
+ "proto"
+ "retries"
+ "uncacheable"
+ "url"
+ "xid") t))
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-builtin-face))
+ (list (concat "\\<\\(beresp\\)\\.\\(backend\\)\\."
+ (regexp-opt
+ '("name"
+ "ip") t))
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-builtin-face)
+ '(3 font-lock-builtin-face))
+ (list (concat "\\<\\(beresp\\)\\."
+ (regexp-opt
+ '("do_esi"
+ "do_gunzip"
+ "do_gzip"
+ "do_stream"
+ "grace"
+ "keep"
+ "proto"
+ "reason"
+ "status"
+ "storage_hint"
+ "ttl"
+ "uncacheable") t))
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-builtin-face))
+ (list (concat "\\<\\(client\\)\\."
+ (regexp-opt
+ '("identity"
+ "ip") t))
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-builtin-face))
+ (list (concat "\\<\\(obj\\)\\."
+ (regexp-opt
+ '("grace"
+ "hits"
+ "keep"
+ "proto"
+ "reason"
+ "status"
+ "ttl"
+ "uncacheable") t))
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-builtin-face))
+ (list (concat "\\<\\(req\\)\\."
+ (regexp-opt
+ '("backend_hint"
+ "can_gzip"
+ "esi"
+ "esi_level"
+ "hash_always_miss"
+ "hash_ignore_busy"
+ "method"
+ "proto"
+ "restarts"
+ "ttl"
+ "url"
+ "xid") t))
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-builtin-face))
+ (list (concat "\\<\\(resp\\)\\."
+ (regexp-opt
+ '("proto"
+ "reason"
+ "status") t))
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-builtin-face))
+ (list (concat "\\<\\(server\\)\\."
+ (regexp-opt
+ '("hostname"
+ "identity"
+ "ip") t))
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-builtin-face))
+ (list (concat "\\<\\(storage\\)\\.\\(\\sw+\\)\\."
+ (regexp-opt
+ '("free_space"
+ "used_space"
+ "happy") t))
+ '(1 font-lock-builtin-face)
+ '(2 font-lock-variahle-name-face)
+ '(3 font-lock-builtin-face))
+
+ (cons
+ (concat "\\<"
+ (regexp-opt
+ '("req"
+ "resp"
+ "bereq"
+ "beresp"
+ "client"
+ "server"
+ "obj"
+ "now") t)
+ "\\>")
+ 'font-lock-builtin-face)
+
+ ;; Function calls
+ '("\\<\\(\\(\\sw+\\)\\.\\)*\\(\\sw+\\)[ \t]*("
+ (2 font-lock-variable-name-face nil t)
+ (3 font-lock-function-name-face))
+ ;; '("\\<\\(\\sw+\\)\\(\\.\\(\\sw+\\)\\)*[ \t]*("
+ ;; (1 font-lock-function-name-face)
+ ;; (3 font-lock-function-name-face nil t))
+
+ ;; Constants
+ '("\\<\\([[:digit:]]+\\(\\.[[:digit:]]+\\)?\\)[ \t]*\\(ms\\|[smhdwy]\\)?\\>"
+ (1 font-lock-constant-face) (3 font-lock-builtin-face nil t)))))
+ "Medium level highlighting for VCL buffers.")
+
+(defconst vcl-font-lock-keywords-3
+ (append vcl-font-lock-keywords-2
+ (eval-when-compile
+ (list
+ ;; User function names.
+ '("^[ \t]*\\(sub\\)\\>[ \t]*\\(\\sw+\\)?"
+ (1 font-lock-keyword-face) (2 font-lock-function-name-face nil t)))))
+ "Gaudy level highlighting for VCL buffers.")
+
+(defvar vcl-font-lock-keywords vcl-font-lock-keywords-3)
+
+(put 'vcl-mode 'c-mode-prefix "vcl-")
+
+(defun vcl-sharp-comment-syntax ()
+ (save-excursion
+ (goto-char (match-beginning 0))
+ (let ((syntax (save-match-data (syntax-ppss))))
+ (cond
+ ((not (or (nth 3 syntax) (nth 4 syntax)))
+ (put-text-property (match-beginning 1) (match-end 1)
+ 'syntax-table (string-to-syntax "<"))
+ (end-of-line)
+ (put-text-property (point) (+ (point) 1)
+ 'syntax-table (string-to-syntax ">")))))))
+
+(defconst vcl-syntax-propertize-function
+ (syntax-propertize-rules
+ ("\\({\\)\""
+ (1 "|"))
+ ("\\({\\)[^\"]"
+ (1 "(}"))
+ ("\"\\(}\\)"
+ (1 "|"))
+ ("\\(^\\|[^\"]\\)\\(}\\)"
+ (2 "){"))
+ ("\\(\"\\)[^}]"
+ (1 (let ((syntax (save-match-data (syntax-ppss))))
+ (string-to-syntax
+ (cond ((nth 4 syntax)
+ ".")
+ ((eq (nth 3 syntax) t)
+ (backward-char)
+ ".")
+ (t
+ (backward-char)
+ "\""))))))
+ ("\\(#\\)"
+ (1 (ignore (vcl-sharp-comment-syntax))))
+ ))
+
+;;;###autoload
+(add-to-list 'auto-mode-alist (cons (purecopy "\\.vcl\\'") 'vcl-mode))
+
+;;;###autoload
+(define-derived-mode vcl-mode prog-mode "VCL"
+ "Major mode for editing VCL code.
+
+Key bindings:
+\\{vcl-mode-map}"
+
+ (set (make-local-variable 'syntax-propertize-function)
+ vcl-syntax-propertize-function)
+ (set (make-local-variable 'parse-sexp-lookup-properties) t)
+ (set (make-local-variable 'comment-start) "# ")
+
+ (c-initialize-cc-mode t)
+ (set-syntax-table vcl-mode-syntax-table)
+ (setq local-abbrev-table vcl-mode-abbrev-table
+ abbrev-mode t)
+ (use-local-map vcl-mode-map)
+ (c-init-language-vars vcl-mode)
+ (c-common-init 'vcl-mode)
+
+ (c-run-mode-hooks 'c-mode-common-hook 'vcl-mode-hook)
+ (c-update-modeline))
+
+(provide 'vcl-mode)

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