Support variable-unquoting syntax in bat-mode

["Jostein Kjønigsen" <jostein@secure.kjonigsen.net>]

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Hey everyone.

For those of us still stuck meddling with Windows batch-files, these
scripts are definitely not getting cleaner or smaller with time.
In such batch-files there are various ways to extract script-parameters
provided by the script/function caller. The most common syntax is
percentage + a numeral, that is %1 represents the first script/function
parameter. Etc.
But when parameters contains spaces, they have to be quoted by the
caller. The variable/parameter then contains the quote, and to
further process them inside your script, they typically need to be
unquoted first.
To do unquoting, you typically use the variable unquote syntax: %~1

In latest Emacs this syntax is not correctly highlighted.  Applying the
following patch seems to fix this:
diff --git a/lisp/progmodes/bat-mode.el b/lisp/progmodes/bat-mode.el
index 102c318..b2edf64 100644
--- a/lisp/progmodes/bat-mode.el
+++ b/lisp/progmodes/bat-mode.el
@@ -84,7 +84,7 @@ bat-font-lock-keywords
          . 'bat-label-face)
         ("\\_<\\(defined\\|set\\)\\_>[ \t]*\\(\\(\\sw\\|\\s_\\)+\\)"
          (2 font-lock-variable-name-face))
-        ("%\\([^%~ \n]+\\)%?"
+        ("%\\([^% \n]+\\)%?"
          (1 font-lock-variable-name-face))

That seems to work for me, but ~ seems like a odd special case to put in
there in the first place, so I would assume it was intentionally put
there. Anyone have any background on this?
If not, does anyone object to this change? And if not, how do I get it
merged into master? :)
--
Regards
Jostein Kjønigsen

jostein@kjonigsen.net 🍵 jostein@gmail.com
https://jostein.kjonigsen.net


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