[RFC v2 18/38] docs: sphinx/kernel_abi: use AbiParser directly

[Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>]

Instead of running get_abi.py script, import AbiParser class and
handle messages directly there using an interactor. This shold save some
memory, as there's no need to exec python inside the Sphinx python
extension.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
---
 Documentation/sphinx/kernel_abi.py | 26 +++++++++++++++-----------
 scripts/get_abi.py                 |  2 +-
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/Documentation/sphinx/kernel_abi.py b/Documentation/sphinx/kernel_abi.py
index fc7500fad119..93d537d8cb6c 100644
--- a/Documentation/sphinx/kernel_abi.py
+++ b/Documentation/sphinx/kernel_abi.py
@@ -42,6 +42,11 @@ from docutils.parsers.rst import directives, Directive
 from sphinx.util.docutils import switch_source_input
 from sphinx.util import logging
 
+srctree = os.path.abspath(os.environ["srctree"])
+sys.path.insert(0, os.path.join(srctree, "scripts"))
+
+from get_abi import AbiParser
+
 __version__ = "1.0"
 
 
@@ -65,7 +70,7 @@ class KernelCmd(Directive):
     logger = logging.getLogger('kernel_abi')
 
     option_spec = {
-        "debug"     : directives.flag,
+        "debug": directives.flag,
     }
 
     def run(self):
@@ -73,18 +78,17 @@ class KernelCmd(Directive):
         if not doc.settings.file_insertion_enabled:
             raise self.warning("docutils: file insertion disabled")
 
-        srctree = os.path.abspath(os.environ["srctree"])
+        path = os.path.join(srctree, "Documentation", self.arguments[0])
+        parser = AbiParser(path, logger=self.logger)
+        parser.parse_abi()
+        parser.check_issues()
 
-        args = [
-            os.path.join(srctree, 'scripts/get_abi.py'),
-            '-D', os.path.join(srctree, 'Documentation', self.arguments[0]),
-            'rest',
-            '--enable-lineno',
-        ]
+        msg = ""
+        for m in parser.doc(enable_lineno=True, show_file=True):
+            msg += m
 
-        lines = subprocess.check_output(args, cwd=os.path.dirname(doc.current_source)).decode('utf-8')
-        nodeList = self.nestedParse(lines, self.arguments[0])
-        return nodeList
+        node = self.nested_parse(msg, self.arguments[0])
+        return node
 
     def nested_parse(self, lines, fname):
         env = self.state.document.settings.env
diff --git a/scripts/get_abi.py b/scripts/get_abi.py
index 2aec1f9dc5aa..3a8dcff85dc2 100755
--- a/scripts/get_abi.py
+++ b/scripts/get_abi.py
@@ -441,7 +441,7 @@ class AbiParser:
 
         return new_desc + "\n\n"
 
-    def doc(self, enable_lineno, output_in_txt, show_file=False):
+    def doc(self, enable_lineno=False, output_in_txt=False, show_file=False):
         """Print ABI at stdout"""
 
         part = None
-- 
2.48.1