bitbake: tests/fetch.py: Fix recursion failure in url mapping

Instead of reproducessing the same line over and over and over, we remove the
current line from the mirror list.  This permits us to re-evaluate the list
while excluding all matches that have previousily occured.

Without this fix, adding this test results in a failure:

RuntimeError: maximum recursion depth exceeded in cmp

(Bitbake rev: 24a8e9a5b0ba145ae589178d74365c986ebca325)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/__init__.py

@@ -862,7 +862,7 @@ def build_mirroruris(origud, mirrors, ld):
     replacements["BASENAME"] = origud.path.split("/")[-1]
     replacements["MIRRORNAME"] = origud.host.replace(':','.') + origud.path.replace('/', '.').replace('*', '.')
 
-    def adduri(ud, uris, uds):
+    def adduri(ud, uris, uds, mirrors):
         for line in mirrors:
             try:
                 (find, replace) = line
@@ -876,6 +876,12 @@ def build_mirroruris(origud, mirrors, ld):
                 logger.debug(1, "Mirror %s not in the list of trusted networks, skipping" %  (newuri))
                 continue
 
+            # Create a local copy of the mirrors minus the current line
+            # this will prevent us from recursively processing the same line
+            # as well as indirect recursion A -> B -> C -> A
+            localmirrors = list(mirrors)
+            localmirrors.remove(line)
+
             try:
                 newud = FetchData(newuri, ld)
                 newud.setup_localpath(ld)
@@ -885,16 +891,16 @@ def build_mirroruris(origud, mirrors, ld):
                 try:
                     # setup_localpath of file:// urls may fail, we should still see 
                     # if mirrors of the url exist
-                    adduri(newud, uris, uds)
+                    adduri(newud, uris, uds, localmirrors)
                 except UnboundLocalError:
                     pass
                 continue   
             uris.append(newuri)
             uds.append(newud)
 
-            adduri(newud, uris, uds)
+            adduri(newud, uris, uds, localmirrors)
 
-    adduri(origud, uris, uds)
+    adduri(origud, uris, uds, mirrors)
 
     return uris, uds
 

bitbake/lib/bb/tests/fetch.py

@@ -405,13 +405,16 @@ class MirrorUriTest(FetcherTest):
                                 'http://otherdownloads.yoctoproject.org/downloads/bitbake-1.0.tar.gz',
                                 'http://downloads2.yoctoproject.org/downloads/bitbake-1.0.tar.gz'])
 
-    recmirrorvar = "https://.*/[^/]*    http://AAAA/A/A/A/ \n"
+    recmirrorvar = "https://.*/[^/]*    http://AAAA/A/A/A/ \n" \
+                   "https://.*/[^/]*    https://BBBB/B/B/B/ \n"
 
     def test_recursive(self):
         fetcher = bb.fetch.FetchData("https://downloads.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz", self.d)
         mirrors = bb.fetch2.mirror_from_string(self.recmirrorvar)
         uris, uds = bb.fetch2.build_mirroruris(fetcher, mirrors, self.d)
-        self.assertEqual(uris, ['http://AAAA/A/A/A/bitbake/bitbake-1.0.tar.gz'])
+        self.assertEqual(uris, ['http://AAAA/A/A/A/bitbake/bitbake-1.0.tar.gz',
+                                'https://BBBB/B/B/B/bitbake/bitbake-1.0.tar.gz',
+                                'http://AAAA/A/A/A/B/B/bitbake/bitbake-1.0.tar.gz'])
 
 class FetcherLocalTest(FetcherTest):
     def setUp(self):