bitbake/fetch2: reduce output for fetch failures

Make the warning for the initial fetch failure a single line - we don't
need the full command and output here yet, but write it into the log in
full as a debug message. However, if fetching from mirrors fails as well
then print out the full details for the first error that occurred as an
ERROR rather than a WARNING.

Since this is logged as an ERROR, combined with an earlier patch it
suppresses the full log which does make the output much more readable
for any fetch error.

Fixes [YOCTO #1832].

(Bitbake rev: 6bbdc7d259c0cc041b62dbdb26cfc3ec6edcb6f3)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/__init__.py

@@ -965,6 +965,7 @@ class Fetch(object):
                 if premirroronly:
                     self.d.setVar("BB_NO_NETWORK", "1")
 
+                firsterr = None
                 if not localpath and m.need_update(u, ud, self.d):
                     try:
                         logger.debug(1, "Trying Upstream")
@@ -980,7 +981,9 @@ class Fetch(object):
                         raise
 
                     except BBFetchException as e:
-                        logger.warn(str(e))
+                        logger.warn('Failed to fetch URL %s' % u)
+                        logger.debug(1, str(e))
+                        firsterr = e
                         # Remove any incomplete fetch
                         if os.path.isfile(ud.localpath):
                             bb.utils.remove(ud.localpath)
@@ -989,6 +992,8 @@ class Fetch(object):
                         localpath = try_mirrors (self.d, ud, mirrors)
 
                 if not localpath or ((not os.path.exists(localpath)) and localpath.find("*") == -1):
+                    if firsterr:
+                        logger.error(str(firsterr))
                     raise FetchError("Unable to fetch URL from any source.", u)
 
                 update_stamp(u, ud, self.d)