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# Report significant differences in the buildhistory repository since a specific revision
#
# Copyright (C) 2012 Intel Corporation
# Author: Paul Eggleton <paul.eggleton@linux.intel.com>
#
# Note: requires GitPython 0.3.1+
#
# You can use this from the command line by running scripts/buildhistory-diff
#
import sys
import os.path
import difflib
import git
# How to display fields
list_fields = ['DEPENDS', 'RDEPENDS', 'RRECOMMENDS', 'PACKAGES', 'FILES', 'FILELIST', 'USER_CLASSES', 'IMAGE_CLASSES', 'IMAGE_FEATURES', 'IMAGE_LINGUAS', 'IMAGE_INSTALL', 'BAD_RECOMMENDATIONS']
numeric_fields = ['PKGSIZE', 'IMAGESIZE']
# Fields to monitor
monitor_fields = ['RDEPENDS', 'RRECOMMENDS', 'PACKAGES', 'FILELIST', 'PKGSIZE', 'IMAGESIZE']
# Percentage change to alert for numeric fields
monitor_numeric_threshold = 20
# Image files to monitor (note that image-info.txt is handled separately)
img_monitor_files = ['installed-package-names.txt', 'files-in-image.txt']
class ChangeRecord:
def __init__(self, path, fieldname, oldvalue, newvalue):
self.path = path
self.fieldname = fieldname
self.oldvalue = oldvalue
self.newvalue = newvalue
self.filechanges = None
def __str__(self):
if self.fieldname in list_fields:
aitems = self.oldvalue.split(' ')
bitems = self.newvalue.split(' ')
removed = list(set(aitems) - set(bitems))
added = list(set(bitems) - set(aitems))
return '%s: %s:%s%s' % (self.path, self.fieldname, ' removed "%s"' % ' '.join(removed) if removed else '', ' added "%s"' % ' '.join(added) if added else '')
elif self.fieldname in numeric_fields:
aval = int(self.oldvalue)
bval = int(self.newvalue)
percentchg = ((bval - aval) / float(aval)) * 100
return '%s: %s changed from %d to %d (%s%d%%)' % (self.path, self.fieldname, aval, bval, '+' if percentchg > 0 else '', percentchg)
elif self.fieldname in img_monitor_files:
out = 'Changes to %s (%s):\n ' % (self.path, self.fieldname)
if self.filechanges:
out += '\n '.join(['%s' % i for i in self.filechanges])
else:
alines = self.oldvalue.splitlines()
blines = self.newvalue.splitlines()
diff = difflib.unified_diff(alines, blines, self.fieldname, self.fieldname, lineterm='')
out += '\n '.join(list(diff))
out += '\n --'
return out
else:
return '%s: %s changed from "%s" to "%s"' % (self.path, self.self.fieldname, self.oldvalue, self.newvalue)
class FileChange:
changetype_add = 'A'
changetype_remove = 'R'
changetype_type = 'T'
changetype_perms = 'P'
changetype_ownergroup = 'O'
changetype_link = 'L'
def __init__(self, path, changetype, oldvalue = None, newvalue = None):
self.path = path
self.changetype = changetype
self.oldvalue = oldvalue
self.newvalue = newvalue
def _ftype_str(self, ftype):
if ftype == '-':
return 'file'
elif ftype == 'd':
return 'directory'
elif ftype == 'l':
return 'symlink'
elif ftype == 'c':
return 'char device'
elif ftype == 'b':
return 'block device'
elif ftype == 'p':
return 'fifo'
elif ftype == 's':
return 'socket'
else:
return 'unknown (%s)' % ftype
def __str__(self):
if self.changetype == self.changetype_add:
return '%s was added' % self.path
elif self.changetype == self.changetype_remove:
return '%s was removed' % self.path
elif self.changetype == self.changetype_type:
return '%s changed type from %s to %s' % (self.path, self._ftype_str(self.oldvalue), self._ftype_str(self.newvalue))
elif self.changetype == self.changetype_perms:
return '%s changed permissions from %s to %s' % (self.path, self.oldvalue, self.newvalue)
elif self.changetype == self.changetype_ownergroup:
return '%s changed owner/group from %s to %s' % (self.path, self.oldvalue, self.newvalue)
elif self.changetype == self.changetype_link:
return '%s changed symlink target from %s to %s' % (self.path, self.oldvalue, self.newvalue)
else:
return '%s changed (unknown)' % self.path
def blob_to_dict(blob):
alines = blob.data_stream.read().splitlines()
adict = {}
for line in alines:
splitv = [i.strip() for i in line.split('=',1)]
if splitv.count > 1:
adict[splitv[0]] = splitv[1]
return adict
def file_list_to_dict(lines):
adict = {}
for line in lines:
# Leave the last few fields intact so we handle file names containing spaces
splitv = line.split(None,4)
# Grab the path and remove the leading .
path = splitv[4][1:].strip()
# Handle symlinks
if(' -> ' in path):
target = path.split(' -> ')[1]
path = path.split(' -> ')[0]
adict[path] = splitv[0:3] + [target]
else:
adict[path] = splitv[0:3]
return adict
def compare_file_lists(alines, blines):
adict = file_list_to_dict(alines)
bdict = file_list_to_dict(blines)
filechanges = []
for path, splitv in adict.iteritems():
newsplitv = bdict.pop(path, None)
if newsplitv:
# Check type
oldvalue = splitv[0][0]
newvalue = newsplitv[0][0]
if oldvalue != newvalue:
filechanges.append(FileChange(path, FileChange.changetype_type, oldvalue, newvalue))
# Check permissions
oldvalue = splitv[0][1:]
newvalue = newsplitv[0][1:]
if oldvalue != newvalue:
filechanges.append(FileChange(path, FileChange.changetype_perms, oldvalue, newvalue))
# Check owner/group
oldvalue = '%s/%s' % (splitv[1], splitv[2])
newvalue = '%s/%s' % (newsplitv[1], newsplitv[2])
if oldvalue != newvalue:
filechanges.append(FileChange(path, FileChange.changetype_ownergroup, oldvalue, newvalue))
# Check symlink target
if newsplitv[0][0] == 'l':
if splitv.count > 3:
oldvalue = splitv[3]
else:
oldvalue = None
newvalue = newsplitv[3]
if oldvalue != newvalue:
filechanges.append(FileChange(path, FileChange.changetype_link, oldvalue, newvalue))
else:
filechanges.append(FileChange(path, FileChange.changetype_remove))
# Whatever is left over has been added
for path in bdict:
filechanges.append(FileChange(path, FileChange.changetype_add))
return filechanges
def compare_lists(alines, blines):
removed = list(set(alines) - set(blines))
added = list(set(blines) - set(alines))
filechanges = []
for pkg in removed:
filechanges.append(FileChange(pkg, FileChange.changetype_remove))
for pkg in added:
filechanges.append(FileChange(pkg, FileChange.changetype_add))
return filechanges
def compare_dict_blobs(path, ablob, bblob, report_all):
adict = blob_to_dict(ablob)
bdict = blob_to_dict(bblob)
changes = []
for key in adict:
if report_all or key in monitor_fields:
if adict[key] != bdict[key]:
if (not report_all) and key in numeric_fields:
aval = int(adict[key])
bval = int(bdict[key])
percentchg = ((bval - aval) / float(aval)) * 100
if percentchg < monitor_numeric_threshold:
continue
chg = ChangeRecord(path, key, adict[key], bdict[key])
changes.append(chg)
return changes
def process_changes(repopath, revision1, revision2 = 'HEAD', report_all = False):
repo = git.Repo(repopath)
assert repo.bare == False
commit = repo.commit(revision1)
diff = commit.diff(revision2)
changes = []
for d in diff.iter_change_type('M'):
path = os.path.dirname(d.a_blob.path)
if path.startswith('packages/'):
changes.extend(compare_dict_blobs(path, d.a_blob, d.b_blob, report_all))
elif path.startswith('images/'):
filename = os.path.basename(d.a_blob.path)
if filename in img_monitor_files:
if filename == 'files-in-image.txt':
alines = d.a_blob.data_stream.read().splitlines()
blines = d.b_blob.data_stream.read().splitlines()
filechanges = compare_file_lists(alines,blines)
if filechanges:
chg = ChangeRecord(path, filename, None, None)
chg.filechanges = filechanges
changes.append(chg)
elif filename == 'installed-package-names.txt':
alines = d.a_blob.data_stream.read().splitlines()
blines = d.b_blob.data_stream.read().splitlines()
filechanges = compare_lists(alines,blines)
if filechanges:
chg = ChangeRecord(path, filename, None, None)
chg.filechanges = filechanges
changes.append(chg)
else:
chg = ChangeRecord(path, filename, d.a_blob.data_stream.read(), d.b_blob.data_stream.read())
changes.append(chg)
elif filename == 'image-info.txt':
changes.extend(compare_dict_blobs(path, d.a_blob, d.b_blob, report_all))
return changes
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