oe/license: implement ast.NodeVisitor.visit_Constant

Since Python 3.8 visit_Num(), visit_Str() and so on are all deprecated
and replaced with visit_Constant.  We can't yet remove the deprecated
functions until we require 3.8, but we can implement visit_Constant to
silence the deprecation warnings.

(From OE-Core rev: 18f10a51387cdee7c7058a3cb3f7c8c24c57c36a)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit abc93390a3f19bc4cc159c5690a478b9e2270906)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/meta/lib/oe/license.py b/meta/lib/oe/license.py
index c1274a61de..c4efbe142b 100644
--- a/meta/lib/oe/license.py
+++ b/meta/lib/oe/license.py
@@ -81,6 +81,9 @@ class FlattenVisitor(LicenseVisitor):
     def visit_Str(self, node):
         self.licenses.append(node.s)
 
+    def visit_Constant(self, node):
+        self.licenses.append(node.value)
+
     def visit_BinOp(self, node):
         if isinstance(node.op, ast.BitOr):
             left = FlattenVisitor(self.choose_licenses)
@@ -234,6 +237,9 @@ class ListVisitor(LicenseVisitor):
     def visit_Str(self, node):
         self.licenses.add(node.s)
 
+    def visit_Constant(self, node):
+        self.licenses.add(node.value)
+
 def list_licenses(licensestr):
     """Simply get a list of all licenses mentioned in a license string.
        Binary operators are not applied or taken into account in any way"""