bitbake: fetch2/wget: add Basic Auth from netrc to checkstatus()

fetch2/wget uses urllib to check the status of the mirrors, wget will
use netrc to pass login and password information however checkstatus
will skip that.

This adds netrc login and password to checkstatus so both will work the
same.

(Bitbake rev: 873e33d0479e977520106b65d149ff1799195bf6)

Signed-off-by: Matthew McClintock <msm-oss@mcclintock.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/wget.py

@@ -305,12 +305,24 @@ class Wget(FetchMethod):
             r = urllib.request.Request(uri)
             r.get_method = lambda: "HEAD"
 
-            if ud.user:
+            def add_basic_auth(login_str, request):
+                '''Adds Basic auth to http request, pass in login:password as string'''
                 import base64
-                encodeuser = base64.b64encode(ud.user.encode('utf-8')).decode("utf-8")
+                encodeuser = base64.b64encode(login_str.encode('utf-8')).decode("utf-8")
                 authheader =  "Basic %s" % encodeuser
                 r.add_header("Authorization", authheader)
 
+            if ud.user:
+                add_basic_auth(ud.user, r)
+
+            try:
+                import netrc, urllib.parse
+                n = netrc.netrc()
+                login, unused, password = n.authenticators(urllib.parse.urlparse(uri).hostname)
+                add_basic_auth("%s:%s" % (login, password), r)
+            except (ImportError, IOError, netrc.NetrcParseError):
+                 pass
+
             opener.open(r)
         except urllib.error.URLError as e:
             if try_again: