utils/size-stats-compare: add package name in detail output

size-stats-compare gives an overview of the size increase/decrease between
two cases, based on packages-file-list.txt. The 'detail' mode gives info per
file, otherwise per package.

But sometimes, you want the detailed per-file info, but only for a specific
package. Since the detailed output no longer lists the package name, you
cannot simply grep for it. A workaround was to filter the input
packages-file-list.txt's first, and then pass these filtered versions to
size-stats-compare.

Make this easier by adding the package name next to the filename in detailed
output. This allows grep'ing normally.
For example:

  $ utils/size-stats-compare orig new  -t 100 -d | grep ebtables

      -67712 removed ebtables             lib/ebtables/libebtc.so
      -66764 removed ebtables             lib/ebtables/libebt_nat.so
      -66752 removed ebtables             sbin/ebtables
      -66704 removed ebtables             lib/ebtables/libebt_arp.so
      -66700 removed ebtables             lib/ebtables/libebt_stp.so
      -66700 removed ebtables             lib/ebtables/libebt_among.so
      -66684 removed ebtables             lib/ebtables/libebt_ip.so
      -66676 removed ebtables             lib/ebtables/libebt_limit.so
      -66656 removed ebtables             lib/ebtables/libebt_log.so
      -66648 removed ebtables             lib/ebtables/libebt_mark.so
      -66636 removed ebtables             lib/ebtables/libebt_pkttype.so
      -66604 removed ebtables             lib/ebtables/libebt_vlan.so
      -66588 removed ebtables             lib/ebtables/libebt_ulog.so
      -66588 removed ebtables             lib/ebtables/libebt_nflog.so
      -66584 removed ebtables             lib/ebtables/libebt_arpreply.so
      -66544 removed ebtables             lib/ebtables/libebt_ip6.so
      -66540 removed ebtables             lib/ebtables/libebt_802_3.so
      -66536 removed ebtables             lib/ebtables/libebt_standard.so
      -66524 removed ebtables             lib/ebtables/libebt_mark_m.so
      -66524 removed ebtables             lib/ebtables/libebt_redirect.so
      -66452 removed ebtables             lib/ebtables/libebtable_filter.so
      -66452 removed ebtables             lib/ebtables/libebtable_broute.so
      -66452 removed ebtables             lib/ebtables/libebtable_nat.so
          45         ebtables             etc/ethertypes
       66752 added   ebtables             usr/sbin/ebtablesd
       66752 added   ebtables             usr/sbin/ebtables-legacy
       66752 added   ebtables             usr/sbin/ebtablesu
      200840 added   ebtables             usr/lib/libebtc.so.0.0.0

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>

utils/size-stats-compare

@@ -40,9 +40,9 @@ def read_file_size_csv(inputf, detail=None):
 
     for row in reader:
         if detail:
-            sizes[row[0]] = int(row[2])
+            sizes[(row[0], row[1])] = int(row[2])
         else:
-            sizes[row[1]] = int(row[3])
+            sizes[(None, row[1])] = int(row[3])
 
     return sizes
 
@@ -73,19 +73,27 @@ def print_results(result, threshold):
 
     from six import iteritems
     list_result = list(iteritems(result))
-    # result is a dictionary: name -> (flag, size difference)
-    # list_result is a list of tuples: (name, (flag, size difference))
+    # result is a dictionary: (filename, pkgname) -> (flag, size difference)
+    # list_result is a list of tuples: ((filename, pkgname), (flag, size difference))
+    # filename may be None if no detail is requested.
+
+    maxpkgname=max(len(pkgname) for filename, pkgname in result)
 
     for entry in sorted(list_result, key=lambda entry: entry[1][1]):
         data = dict(
-            name=entry[0],
+            filename=entry[0][0],
+            pkgname=entry[0][1],
             action=entry[1][0],
             size=entry[1][1],
+            maxpkgname=maxpkgname,
         )
 
         if threshold is not None and abs(data['size']) <= threshold:
             continue
-        print('{size:12d} {action:7s} {name}'.format(**data))
+        if data['filename']:
+            print('{size:12d} {action:7s} {pkgname:{maxpkgname}s} {filename}'.format(**data))
+        else:
+            print('{size:12d} {action:7s} {pkgname}'.format(**data))
 
 
 # main #########################################################################
@@ -132,5 +140,5 @@ print('Size difference per %s (bytes), threshold = %s' % (keyword, args.threshol
 print(80*'-')
 print_results(delta, args.threshold)
 print(80*'-')
-print_results({'TOTAL': ('', sum(new_sizes.values()) - sum(old_sizes.values()))},
+print_results({(None, 'TOTAL'): ('', sum(new_sizes.values()) - sum(old_sizes.values()))},
               threshold=None)