Support variable-unquoting syntax in bat-mode

[Jostein Kjønigsen]

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

address@hidden 🍵 address@hidden

https://jostein.kjonigsen.net