Adding custom bugzilla fields

[Ander Conselvan De Oliveira <conselvan2@gmail.com>]

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Hi all,

I've been looking into creating custom fields in Bugzilla to help sort
our bugs in a more manageable way. I did some testing in a private
installation and came up with this proposal. In a nut shell, we would
add the following two fields:

	i915 platform:	list of platforms affected by a bug;
	i915 features:  list of features affected by a bug.

Both would be multiple selection fields. The accepted values would be
configured in the Bugzilla installation. The attached screenshots show
how this would look like in the bug view and bug list views.

My expectation is that using those fields we could have a clearer view
of which areas and/or platforms require more attention. For example, I
attached a screenshot of a sample report breaking down the bugs per
feature and platform. That report requires Bugzilla 5.0 (which hasn't
been released yet) since prior versions didn't support reports with
multiple selection fields. However, it is also possible to script a
similar report, as the attached python script does. The output looks
something like this:

Feature                ALL  ILK  SNB  BYT  IVB  HSW  BDW  BSW  SKL
display - atomic         0    0    1    0    0    0    1    0    0
display - audio          0    0    0    0    0    0    0    0    0
display - DP             0    0    1    0    1    0    1    0    0
display - DP MST         0    0    0    0    0    0    0    0    0
display - DSI            0    0    0    0    0    0    0    0    0
display - eDP            0    0    0    0    0    0    0    0    0
display - fastboot       0    0    0    0    0    0    0    0    0
display - FBC            0    0    0    0    0    0    0    0    0
display - HDMI           0    0    0    0    0    0    0    0    0
display - IPS            0    0    0    0    0    0    0    0    0
display - LVDS           0    0    0    0    0    0    0    0    0
display - PSR            0    0    0    0    0    0    0    0    0
display - Other          0    0    0    0    0    0    0    0    0
GEM - execlists          0    0    0    0    0    0    0    0    0
GEM - PPGTT              0    0    0    0    0    0    0    0    0
GEM - Other              1    0    0    0    0    0    1    0    0
power - RC6              0    0    0    1    0    0    0    0    0
power - RCS              0    0    0    0    0    0    0    0    0
power - Other            0    0    0    0    0    0    0    0    0


So I would like to hear what other people think about this. Specially,
about what should be in the features field. The values can change
overtime, but would be good to have a good list from the start. The
values above are an incomplete list I threw together while looking at
different open bugs.

Thanks,
Ander

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[-- Attachment #5: features_vs_platform.py --]
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import bugzilla
import collections

bugzilla_url = "http://192.168.100.244/bugzilla/xmlrpc.cgi"

closed_states = ['RESOLVED', 'VERIFIED', 'CLOSED']
open_states = ["REOPENED", "NEEDINFO", "NEW", "ASSIGNED"]

def get_custom_fields_allowed_values(bz):
	fields = ['cf_i915_platform', 'cf_i915_features']
	r =  bz._proxy.Bug.fields({'names': fields,
				   'include_fields': ['values']})

	list_of_raw_values = [f['values'] for f in r['fields']]
	values = [[v['name'] for v in f] for f in list_of_raw_values]

	assert len(values) == len(fields)
	return dict(zip(fields, values))

def get_drm_intel_bugs(bz):
	query = bz.build_query(product="DRI", component="DRM/Intel",
			       status=open_states)
	return bz.query(query)

def split_bugs_per_field(bz, bugs, field):
	split = collections.OrderedDict()

	allowed_values = get_custom_fields_allowed_values(bz)
	for v in allowed_values[field]:
		split[v] = []

	for bug in bugs:
		if field in bug.__dict__:
			for value in bug.__dict__[field]:
				split[value].append(bug)

	return split

def intersect_lists(list1, list2):
	return [v for v in list1 if v in list2]

def stringfy_list(l, spacing=5):
	return ''.join([s.rjust(spacing) for s in map(str, l)])

if __name__ == "__main__":
	bz = bugzilla.Bugzilla(url=bugzilla_url)

	bugs = get_drm_intel_bugs(bz)

	per_platform = split_bugs_per_field(bz, bugs, 'cf_i915_platform')
	per_feature = split_bugs_per_field(bz, bugs, 'cf_i915_features')

	print "Feature".ljust(20), stringfy_list(per_platform)

	for feature in per_feature:
		common_count = []
		for platform in per_platform:
			common = intersect_lists(per_feature[feature],
						 per_platform[platform])
			common_count.append(len(common))

		print feature.ljust(20), stringfy_list(common_count)


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