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yocto-compat-layer: limit report of signature changes 

Typically a single change cascades through the entire task dependency
chain. Developers had to figure that out themselves, based on hard to
read and interpret output (not sorted, no indention, no explanations):

   $ yocto-compat-layer.py -n meta-xxxx
   ...
   AssertionError: True is not false : Layer meta-xxxx changed signatures.
   webkitgtk:do_install changed fe2edc9082bc0da98f9cb1391c52f565 -> b3a44684c5cd9aacd3f7c6ed88eefab5
   gstreamer1.0-plugins-good:do_configure changed 3b2f8211be3fe08422bf6087f3af16d1 -> 7d80e42fa1f4f01ff4dfe2ea4477d382
   pulseaudio:do_package_qa changed 5d0a58ada66ff17f5576555302ac319a -> 0e13bcb96143d1ae54c451bc3de0aa30
   epiphany:do_prepare_recipe_sysroot changed 29e1b277dbcb005bd54950594c50d91b -> d3c45527b37677a0668ce483c6db3052
   ...
   gst-player:do_packagedata changed 9ce6efdd357dd74919bc4957458b1e95 -> d0c083ce629f37adfc9c4ba9eff81f83
   gstreamer1.0-plugins-base:do_install changed 1161cd867d15bea63e5dd5d9abf0519c -> 5bf2b652a2d77fee3eedb35af2f201a0
   gstreamer1.0-rtsp-server:do_packagedata changed 6781dc3070f80b843ed1970d74dd323e -> 454620c2e3b9fea87e525d14b6ed0344
   alsa-plugins:do_packagedata changed 1808c3f737cb805b169d004e948ea19c -> 480124b7fa5eab1f73bf96440d725231

Now the tool automates the problem analysis: it retrieves the depgraph
using the tinfoil API and only reports those tasks with modified
signatures whose dependencies have not changed, i.e. those tasks which
definitely introduce a change.

>From the previous example, that just leaves two tasks that need to be
checked:

   AssertionError: False is not true : Layer meta-xxxx changed 120 signatures, initial differences (first hash without, second with layer):
      gstreamer1.0-plugins-base:do_fetch: 76973f19f2e30d282152bdd7e4efe5bb -> e6e7c6fa9f2bd59d7d8d107f7c6ca1ac
      pulseaudio:do_install: 668eb1e30af129df9806b0aa0d7c10cd -> 1196bdb88eef56eeee4613bb06b9387e

This pruning might be a bit too aggressive in the sense that tasks
which inherit a change and then add more changes themselves won't be
reported initially. They will be found when fixing the reported tasks
and re-running the check.

For a developer it seems better to have something listed which
definitely is a problem and needs fixing instead of everything,
including the tasks which don't need fixes.

(From OE-Core rev: 7ab0e09de75bfd7e7498bfa72d1f2f5d02a96747)

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Patrick Ohly 2017-04-05 15:36:05 +02:00 committed by Richard Purdie
parent efd3b0ee30
commit 7d4fa58c5c
2 changed files with 73 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
scripts/lib/compatlayer/__init__.py
View File

@ -7,6 +7,8 @@ import os
import subprocess
from enum import Enum
import bb.tinfoil
class LayerType(Enum):
BSP = 0
DISTRO = 1
@ -252,3 +254,33 @@ def get_signatures(builddir, failsafe=False):
raise RuntimeError('Can\'t load signatures from %s' % sigs_file)
return sigs
def get_depgraph(targets=['world']):
'''
Returns the dependency graph for the given target(s).
The dependency graph is taken directly from DepTreeEvent.
'''
depgraph = None
with bb.tinfoil.Tinfoil() as tinfoil:
tinfoil.prepare(config_only=False)
tinfoil.set_event_mask(['bb.event.NoProvider', 'bb.event.DepTreeGenerated', 'bb.command.CommandCompleted'])
if not tinfoil.run_command('generateDepTreeEvent', targets, 'do_build'):
raise RuntimeError('starting generateDepTreeEvent failed')
while True:
event = tinfoil.wait_event(timeout=1000)
if event:
if isinstance(event, bb.command.CommandFailed):
raise RuntimeError('Generating dependency information failed: %s' % event.error)
elif isinstance(event, bb.command.CommandCompleted):
break
elif isinstance(event, bb.event.NoProvider):
if event._reasons:
raise RuntimeError('Nothing provides %s: %s' % (event._item, event._reasons))
else:
raise RuntimeError('Nothing provides %s.' % (event._item))
elif isinstance(event, bb.event.DepTreeGenerated):
depgraph = event._depgraph
if depgraph is None:
raise RuntimeError('Could not retrieve the depgraph.')
return depgraph

54
scripts/lib/compatlayer/cases/common.py
View File

@ -3,7 +3,7 @@
import os
import unittest
from compatlayer import get_signatures, LayerType, check_command
from compatlayer import get_signatures, LayerType, check_command, get_depgraph
from compatlayer.case import OECompatLayerTestCase
class CommonCompatLayer(OECompatLayerTestCase):
@ -31,21 +31,49 @@ class CommonCompatLayer(OECompatLayerTestCase):
raise unittest.SkipTest("Layer %s isn't BSP or DISTRO one." \
% self.tc.layer['name'])
# task -> (old signature, new signature)
sig_diff = {}
curr_sigs = get_signatures(self.td['builddir'], failsafe=True)
for task in self.td['sigs']:
if task not in curr_sigs:
continue
if task in curr_sigs and \
self.td['sigs'][task] != curr_sigs[task]:
sig_diff[task] = (self.td['sigs'][task], curr_sigs[task])
if self.td['sigs'][task] != curr_sigs[task]:
sig_diff[task] = '%s -> %s' % \
(self.td['sigs'][task], curr_sigs[task])
detail = ''
if sig_diff:
for task in sig_diff:
detail += "%s changed %s\n" % (task, sig_diff[task])
self.assertFalse(bool(sig_diff), "Layer %s changed signatures.\n%s" % \
(self.tc.layer['name'], detail))
# Beware, depgraph uses task=<pn>.<taskname> whereas get_signatures()
# uses <pn>:<taskname>. Need to convert sometimes. The output follows
# the convention from get_signatures() because that seems closer to
# normal bitbake output.
def sig2graph(task):
pn, taskname = task.rsplit(':', 1)
return pn + '.' + taskname
def graph2sig(task):
pn, taskname = task.rsplit('.', 1)
return pn + ':' + taskname
depgraph = get_depgraph()
depends = depgraph['tdepends']
# If a task A has a changed signature, but none of its
# dependencies, then we need to report it because it is
# the one which introduces a change. Any task depending on
# A (directly or indirectly) will also have a changed
# signature, but we don't need to report it. It might have
# its own changes, which will become apparent once the
# issues that we do report are fixed and the test gets run
# again.
sig_diff_filtered = []
for task, (old_sig, new_sig) in sig_diff.items():
deps_tainted = False
for dep in depends.get(sig2graph(task), ()):
if graph2sig(dep) in sig_diff:
deps_tainted = True
break
if not deps_tainted:
sig_diff_filtered.append((task, old_sig, new_sig))
msg = []
msg.append('Layer %s changed %d signatures, initial differences (first hash without, second with layer):' %
(self.tc.layer['name'], len(sig_diff)))
for diff in sorted(sig_diff_filtered):
msg.append(' %s: %s -> %s' % diff)
self.assertTrue(False, '\n'.join(msg))