docs(#2934): add lintdoc.sh to CI

Author: alex-courtis

Makefile

@@ -40,9 +40,11 @@ help-update:
 
 #
 # CI
+# --ignore-blank-lines is used as nightly has removed unnecessary blank lines that stable (0.11.5) currently inserts
 #
 help-check: help-update
 	git diff --ignore-blank-lines --exit-code doc/nvim-tree-lua.txt
+	@scripts/lintdoc.sh
 
 
 .PHONY: all lint style check luacheck style-check style-doc luals style-fix help-update help-check

scripts/lintdoc.sh

@@ -15,8 +15,18 @@
 set -e
 
 if [ ! -d "${NVIM_SRC}" ]; then
-	echo "\$NVIM_SRC not set"
-	exit 1
+	cat << EOM
+
+\$NVIM_SRC not set
+
+Compiled Nvim source is required to run src/gen/gen_vimdoc.lua
+
+Please:
+  mkdir -p src
+  curl -L 'https://github.com/neovim/neovim/archive/refs/tags/stable.tar.gz' | tar zx --directory src
+  NVIM_SRC=src/neovim-stable ${0}
+EOM
+exit 1
 fi
 
 # runtime/doc in the nvim source is practically hardcoded, copy our help in