Makefile language injection determined by SHELL variable

[jakubkaczor]

Currently, in makefiles, the language injected in place of recipes is Bash. It would be nice if the language was determined by the make variable SHELL that defaults to /bin/sh¹. For example, the recipe in

SHELL := /usr/bin/env nu

test:
	echo "hello" o+e> test.txt

should be highlighted as in

#!/usr/bin/env nu
echo "hello" o+e> test.txt

A similar behavior is already achieved in the case of Just².

Footnotes

1. https://www.gnu.org/software/make/manual/html_node/Choosing-the-Shell.html ↩

2. https://github.com/helix-editor/helix/blob/a7651f5bf027ec98645d571ab05a685d97e1b772/runtime/queries/just/injections.scm#L25 ↩