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| -rw-r--r-- | classes/task-metadata-track.bbclass | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/classes/task-metadata-track.bbclass b/classes/task-metadata-track.bbclass new file mode 100644 index 0000000000..d3622aef68 --- /dev/null +++ b/classes/task-metadata-track.bbclass @@ -0,0 +1,96 @@ +# Copyright (C) 2009 Chris Larson <clarson@kergoth.com> +# Released under the MIT license (see COPYING.MIT for the terms) +# +# This class uses events to capture the state of the datastore when the task +# starts, and after it completes. It diffs those captured states, and emits +# messages showing which variables changed, and what their values were changed +# to. +# +# It provides a mechanism to blacklist variables you expect to change, both +# globally and on a per-task basis. +# +# Known instances of tasks changing metadata: +# +# PSTAGE_PKGMANAGER changes by calls to pstage_set_pkgmanager in: +# do_clean, do_setscene, do_package_stage +# +# Subpackage metadata, read by the pkgdata functions in base.bbclass, in: +# do_package, do_package_stage, do_package_write_* + + +TASK_METADATA_BLACKLIST = "\ + __RUNQUEUE_DO_NOT_USE_EXTERNALLY \ +" + +#TASK_METADATA_BLACKLIST_do_clean = "\ +# PSTAGE_PKGMANAGER \ +#" + + +def dict_diff(olddict, newdict): + diff = {} + for key in set(olddict).union(set(newdict)): + old = olddict.get(key) + new = newdict.get(key) + if old != new: + diff[key] = (old, new) + + return diff + +def dict_for_data(data): + newdict = {} + for key in data.keys(): + newdict[key] = data.getVar(key, False) + return newdict + +def task_metadata_track_start(task, data): + originaldata = dict_for_data(data) + data.setVar("__originaldata_%s" % task, originaldata) + +def task_metadata_track_stop(task, data): + from bb import note + + pf = data.getVar("PF", True) + def emit(msg): + note("%s: %s" % (pf, msg)) + + originaldata = data.getVar("__originaldata_%s" % task, False) + newdata = dict_for_data(data) + blacklist = data.getVar("TASK_METADATA_BLACKLIST", True).split() + \ + (data.getVar("TASK_METADATA_BLACKLIST_%s" % task, True) or "").split() + + diff = dict_diff(originaldata, newdata) + diff_clean = [key for key in diff \ + if not key in blacklist and \ + not key.startswith("__originaldata_")] + + if diff_clean: + emit("Variables changed by %s:" % task) + for key in diff_clean: + (old, new) = diff[key] + emit(" %s:" % key) + emit(" '%s' -> '%s'" % (old, new)) + +python __task_metadata_track_eh () { + from bb.build import TaskStarted, TaskSucceeded + + if isinstance(e, TaskStarted): + if e.data is None: + from bb import fatal + fatal("e.data is none for %s" % e) + task_metadata_track_start(e.task, e.data) + elif isinstance(e, TaskSucceeded): + task_metadata_track_stop(e.task, e.data) +} +addhandler __task_metadata_track_eh + +addtask py_listtasks +do_py_listtasks[nostamp] = "1" +do_py_listtasks[recrdeptask] = "do_py_listtasks" +python do_py_listtasks() { + import sys + for e in d.keys(): + if d.getVarFlag(e, "task") and \ + d.getVarFlag(e, "python"): + sys.stdout.write("%s\n" % e) +} |