* coq-mode.el: New file to make coq-mode independent from PG

Move the part of coq.el that is not specific to ProofGeneral into coq-mode.el
to make `coq-mode` into a major mode that can work without PG.

* coq/coq-mode.el: New file, with code extracted from coq.el.
(coq-use-pg): New var.
(coq-near-comment-region): Complete rewrite.

* Makefile.devel (autoloads): Add `coq` to the scanned subdirectories.
* generic/proof-autoloads.el: Regenerate.

* generic/proof-site.el: Don't override pre-existing major-mode definitions.

* coq/coq-syntax.el (coq-init-syntax-table): Delete function.
Setup the syntax-table while loading coq-mode.el instead.

* coq/coq-system.el (coq-prog-name, get-coq-library-directory)
(coq-library-directory, coq-tags): Move to coq-mode.el.

* coq/coq.el: Set proof-assistant when loaded.
(coq-may-use-prettify, coq-outline-regexp)
(coq-outline-heading-end-regexp, coq-mode)
(coq-prettify-symbols-alist, coq-fill-paragraph-function)
(coq-adaptive-fill-function): Move to coq-mode.el.
(coq-shell-mode-syntax-table, coq-response-mode-syntax-table)
(coq-goals-mode-syntax-table): Just reuse the already setup
coq-mode-syntax-table...
(coq-shell-mode-config, coq-goals-mode-config, coq-response-config):
... instead of calling coq-init-syntax-table.
(coq-get-comment-region): Delete, not used any more.
(coq-pg-mode-map): New var.  Move top-level keymap setup here.
(coq-pg-setup): Rename from coq-mode-config.
Move all the non-PG specific settings to coq-mode.

* generic/proof-script.el (proof-mode): Simplify call to
proof-splash-message since it does the same extra tests internally.
(proof-config-done-related): Don't touch font-lock-defaults if the mode
doesn't provide any font-lock-defaults.

* isar/isar-syntax.el: Use lexical-binding.
(isar-font-lock-fontify-syntactically-region): Make it
callable from font0lock-keywords.
(isar-font-lock-keywords-1):
Call isar-font-lock-fontify-syntactically-region.

* generic/proof-syntax.el (font-lock-fontify-keywords-region):
Remove advice.
(proof-ids): Remove, unused.

* lib/bufhist.el (bufhist-erase-buffer):
Don't let-bind after-change-functions.

* generic/pg-pbrpm.el (pg-pbrpm-auto-select-around-point):
Fix one more left-over cl.el use.

* generic/proof-utils.el (proof-with-script-buffer): Add edebug spec.

1 files changed, 6 insertions, 9 deletions

diff --git a/generic/proof-script.el b/generic/proof-script.el
index f8cf0cab..178477cf 100644
--- a/generic/proof-script.el
+++ b/generic/proof-script.el
@@ -2255,17 +2255,13 @@ query saves here."
 ;; Proof General scripting mode definition, part 1.
 ;;
 
-(defvar proof--splash-done nil)
-
 ;;;###autoload
 (define-derived-mode proof-mode fundamental-mode
   proof-general-name
   "Proof General major mode class for proof scripts.
 \\{proof-mode-map}"
 
-  (unless (or proof--splash-done noninteractive)
-    (setq proof--splash-done t)
-    (proof-splash-message))
+  (proof-splash-message)
 
   (setq proof-buffer-type 'script)
 
@@ -2374,10 +2370,11 @@ mode features, but are only ever processed atomically by the proof
 assistant."
   (setq proof-script-buffer-file-name buffer-file-name)
 
-  (setq font-lock-defaults
-	(list '(proof-script-font-lock-keywords)
-	      ;; see defadvice in proof-syntax
-	      (fboundp (proof-ass-sym font-lock-fontify-syntactically-region))))
+  (when proof-script-font-lock-keywords
+    (setq font-lock-defaults
+	  (list '(proof-script-font-lock-keywords)
+	        ;; see defadvice in proof-syntax
+	        (fboundp (proof-ass-sym font-lock-fontify-syntactically-region)))))
 
   ;; Has buffer already been processed?
   ;; NB: call to file-truename is needed for GNU Emacs which