fix(gen_vimdoc.py): handle missing luajit

scripts/gen_vimdoc.py

@@ -295,14 +295,16 @@ annotation_map = {
 # or if `cond()` is callable and returns True.
 def debug_this(o, cond=True):
     name = ''
+    if cond is False:
+        return
     if not isinstance(o, str):
         try:
             name = o.nodeName
             o = o.toprettyxml(indent='  ', newl='\n')
         except Exception:
             pass
-    if ((callable(cond) and cond())
-            or (not callable(cond) and cond)
+    if (cond is True
+            or (callable(cond) and cond())
             or (not callable(cond) and cond in o)):
         raise RuntimeError('xxx: {}\n{}'.format(name, o))
 
@@ -887,7 +889,7 @@ def extract_from_xml(filename, target, width, fmt_vimhelp):
 def fmt_doxygen_xml_as_vimhelp(filename, target):
     """Entrypoint for generating Vim :help from from Doxygen XML.
 
-    Returns 3 items:
+    Returns 2 items:
       1. Vim help text for functions found in `filename`.
       2. Vim help text for deprecated functions.
     """
@@ -1094,6 +1096,10 @@ def main(config, args):
                         fn_map_full.update(fn_map)
 
         if len(sections) == 0:
+            if target == 'lua':
+                fail(f'no sections for target: {target} (this usually means'
+                     + ' "luajit" was not found by scripts/lua2dox_filter)')
+            else:
                 fail(f'no sections for target: {target}')
         if len(sections) > len(CONFIG[target]['section_order']):
             raise RuntimeError(

scripts/lua2dox_filter

@@ -36,6 +36,10 @@ test_executable(){
 
 ##! \brief sets the lua interpreter
 set_lua(){
+	if test -z "${EXE}"; then
+		test_executable '.deps/usr/bin/luajit'
+	fi
+
 	if test -z "${EXE}"; then
 		test_executable 'luajit'
 	fi
@@ -73,7 +77,8 @@ do_readlink(){
 set_lua
 if test -z "${EXE}"
 then
-	echo "no lua interpreter available"
+	echo "no lua interpreter found"
+	exit 1
 else
 	BASENAME=`basename "$0"`
 	do_readlink "$0"