[bitbake-devel] [PATCH 1/2] bitbake: ensure -f causes dependent tasks to be re-run
Paul Eggleton
paul.eggleton at linux.intel.com
Mon Jun 18 15:45:35 UTC 2012
If -f is specified, force dependent tasks to be re-run next time. This
works by changing the force behaviour so that instead of deleting the
task's stamp, we write a "taint" file into the stamps directory, which
will alter the taskhash randomly and thus trigger the task to re-run
next time we evaluate whether or not that should be done as well as
influencing the taskhashes of any dependent tasks so that they are
similarly re-triggered. As a bonus because we write this file as
<stamp file name>.taskname.taint, the existing code which deletes the
stamp files in OE's do_clean will already handle removing it.
This means you can now do the following:
bitbake somepackage
[ change the source code in the package's WORKDIR ]
bitbake -c compile -f somepackage
bitbake somepackage
and the result will be that all of the tasks that depend on do_compile
(do_install, do_package, etc.) will be re-run in the last step.
Note that to operate in the manner described above you need full hashing
enabled (i.e. BB_SIGNATURE_HANDLER must be set to a signature handler
that inherits from BasicHash). If this is not the case, -f will just
delete the stamp for the specified task as it did before.
This fix is required for [YOCTO #2615] and [YOCTO #2256].
Signed-off-by: Paul Eggleton <paul.eggleton at linux.intel.com>
---
bitbake/lib/bb/build.py | 18 ++++++++++++++++++
bitbake/lib/bb/cooker.py | 6 +++---
bitbake/lib/bb/runqueue.py | 12 ++++++------
bitbake/lib/bb/siggen.py | 35 +++++++++++++++++++++++++++++++++++
4 files changed, 62 insertions(+), 9 deletions(-)
diff --git a/bitbake/lib/bb/build.py b/bitbake/lib/bb/build.py
index a9ba02d..a0a7dd4 100644
--- a/bitbake/lib/bb/build.py
+++ b/bitbake/lib/bb/build.py
@@ -494,6 +494,24 @@ def del_stamp(task, d, file_name = None):
stamp = stamp_internal(task, d, file_name)
bb.utils.remove(stamp)
+def write_taint(task, d, file_name = None):
+ """
+ Creates a "taint" file which will force the specified task and its
+ dependents to be re-run the next time by influencing the value of its
+ taskhash.
+ (d can be a data dict or dataCache)
+ """
+ import uuid
+ if file_name:
+ taintfn = d.stamp[file_name] + '.' + task + '.taint'
+ else:
+ taintfn = d.getVar('STAMP', True) + '.' + task + '.taint'
+ bb.utils.mkdirhier(os.path.dirname(taintfn))
+ # The specific content of the taint file is not really important,
+ # we just need it to be random, so a random UUID is used
+ with open(taintfn, 'w') as taintf:
+ taintf.write(str(uuid.uuid4()))
+
def stampfile(taskname, d, file_name = None):
"""
Return the stamp for a given task
diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index 928b600..9b8d4b2 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -1066,10 +1066,10 @@ class BBCooker:
self.status.rundeps[fn] = []
self.status.runrecs[fn] = []
- # Remove stamp for target if force mode active
+ # Invalidate task for target if force mode active
if self.configuration.force:
- logger.verbose("Remove stamp %s, %s", task, fn)
- bb.build.del_stamp('do_%s' % task, self.status, fn)
+ logger.verbose("Invalidate task %s, %s", task, fn)
+ bb.parse.siggen.invalidate_task('do_%s' % task, self.status, fn)
# Setup taskdata structure
taskdata = bb.taskdata.TaskData(self.configuration.abort)
diff --git a/bitbake/lib/bb/runqueue.py b/bitbake/lib/bb/runqueue.py
index d925b4c..28eb072 100644
--- a/bitbake/lib/bb/runqueue.py
+++ b/bitbake/lib/bb/runqueue.py
@@ -705,6 +705,12 @@ class RunQueueData:
continue
self.runq_setscene.append(task)
+ # Invalidate task if force mode active
+ if self.cooker.configuration.force:
+ for (fn, target) in self.target_pairs:
+ logger.verbose("Invalidate task %s, %s", target, fn)
+ bb.parse.siggen.invalidate_task(target, self.dataCache, fn)
+
# Interate over the task list and call into the siggen code
dealtwith = set()
todeal = set(range(len(self.runq_fnid)))
@@ -731,12 +737,6 @@ class RunQueueData:
deps.append(depidentifier)
self.hash_deps[identifier] = deps
- # Remove stamps for targets if force mode active
- if self.cooker.configuration.force:
- for (fn, target) in self.target_pairs:
- logger.verbose("Remove stamp %s, %s", target, fn)
- bb.build.del_stamp(target, self.dataCache, fn)
-
return len(self.runq_fnid)
def dump_data(self, taskQueue):
diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index c4b7c39..0fb2642 100644
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -50,6 +50,10 @@ class SignatureGenerator(object):
def dump_sigtask(self, fn, task, stampbase, runtime):
return
+ def invalidate_task(self, task, d, fn):
+ bb.build.del_stamp(task, d, fn)
+
+
class SignatureGeneratorBasic(SignatureGenerator):
"""
"""
@@ -153,6 +157,15 @@ class SignatureGeneratorBasic(SignatureGenerator):
return False
return True
+ def read_taint(self, fn, task, stampbase):
+ taint = None
+ try:
+ with open(stampbase + '.' + task + '.taint', 'r') as taintf:
+ taint = taintf.read()
+ except IOError:
+ pass
+ return taint
+
def get_taskhash(self, fn, task, deps, dataCache):
k = fn + "." + task
data = dataCache.basetaskhash[k]
@@ -173,6 +186,11 @@ class SignatureGeneratorBasic(SignatureGenerator):
for (f,cs) in checksums:
self.file_checksum_values[k][f] = cs
data = data + cs
+
+ taint = self.read_taint(fn, task, dataCache.stamp[fn])
+ if taint:
+ data = data + taint
+
h = hashlib.md5(data).hexdigest()
self.taskhash[k] = h
#d.setVar("BB_TASKHASH_task-%s" % task, taskhash[task])
@@ -214,6 +232,10 @@ class SignatureGeneratorBasic(SignatureGenerator):
for dep in data['runtaskdeps']:
data['runtaskhashes'][dep] = self.taskhash[dep]
+ taint = self.read_taint(fn, task, stampbase)
+ if taint:
+ data['taint'] = taint
+
with open(sigfile, "wb") as f:
p = pickle.Pickler(f, -1)
p.dump(data)
@@ -245,6 +267,9 @@ class SignatureGeneratorBasicHash(SignatureGeneratorBasic):
h = self.basehash[k]
return ("%s.%s.%s.%s" % (stampbase, taskname, h, extrainfo)).rstrip('.')
+ def invalidate_task(self, task, d, fn):
+ bb.build.write_taint(task, d, fn)
+
def dump_this_task(outfile, d):
import bb.parse
fn = d.getVar("BB_FILENAME", True)
@@ -357,6 +382,13 @@ def compare_sigfiles(a, b):
for dep in changed:
print "Hash for dependent task %s changed from %s to %s" % (dep, a[dep], b[dep])
+
+ a_taint = a_data.get('taint', None)
+ b_taint = b_data.get('taint', None)
+ if a_taint != b_taint:
+ print "Taint (by forced/invalidated task) changed from %s to %s" % (a_taint, b_taint)
+
+
def dump_sigfile(a):
p1 = pickle.Unpickler(open(a, "rb"))
a_data = p1.load()
@@ -384,3 +416,6 @@ def dump_sigfile(a):
if 'runtaskhashes' in a_data:
for dep in a_data['runtaskhashes']:
print "Hash for dependent task %s is %s" % (dep, a_data['runtaskhashes'][dep])
+
+ if 'taint' in a_data:
+ print "Tainted (by forced/invalidated task): %s" % a_data['taint']
--
1.7.9.5
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