lorax/utils/filediff.py

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import sys
import os
import magic
import difflib
import yum # pylint: disable=import-error
import operator
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def main(args):
try:
sourcedir, targetdir = args[1], args[2]
except IndexError:
print("invalid argument count")
print("usage: python {0} sourcetree targettree".format(args[0]))
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sys.exit(2)
if sourcedir.endswith("/"):
sourcedir = sourcedir[:-1]
if targetdir.endswith("/"):
targetdir = targetdir[:-1]
# parse sourcedir and targetdir
sourcetree, targettree = {}, {}
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for tree, d in [[sourcetree, sourcedir], [targettree, targetdir]]:
for root, _dnames, fnames in os.walk(d):
for fname in fnames:
fpath = os.path.join(root, fname)
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rpath = fpath.replace(d, "", 1)
tree[rpath] = fpath
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# set up magic
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m = magic.open(magic.MAGIC_NONE)
m.load()
# get files missing in source
sys.stderr.write("getting files missing in source\n")
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for rpath in sorted(targettree.keys()):
fpath = targettree[rpath]
targetfile = fpath
try:
sourcefile = sourcetree[rpath]
except KeyError:
sys.stdout.write('Missing: %s\n' % rpath)
continue
# skip broken links
if os.path.islink(targetfile) and not os.path.exists(targetfile):
continue
# check stat
#sourcemode = os.stat(sourcefile).st_mode
#targetmode = os.stat(targetfile).st_mode
#if sourcemode != targetmode:
# sys.stdout.write('Stat differ: %s\n' % rpath)
# diff only text files
ftype = m.file(fpath)
if ftype not in ["ASCII text"]:
continue
with open(targetfile, "r") as fobj:
target = fobj.readlines()
with open(sourcefile) as fobj:
source = fobj.readlines()
# do the file diff
for line in difflib.unified_diff(source, target,
fromfile=sourcefile,
tofile=targetfile):
sys.stdout.write(line)
# set up yum
# XXX HACK
# we don't want yum's stuff in the output
# so we redirect stdout to /dev/null for a while...
stdout = os.dup(1)
null = open("/dev/null", "w")
os.dup2(null.fileno(), 1)
# here yum prints out some stuff we really don't care about
yb = yum.YumBase()
yb.doSackSetup()
# give the stdout back
os.dup2(stdout, 1)
null.close()
# get excessive files in source
sys.stderr.write("getting excessive files in source\n")
sizedict, pkgdict = {}, {}
for rpath, fpath in sourcetree.items():
# if file in target, skip it
if rpath in targettree:
continue
# get file size
try:
sizeinbytes = os.path.getsize(fpath)
except OSError:
sizeinbytes = 0
# set link size to 0
islink = os.path.islink(fpath)
if islink:
sizeinbytes = 0
pkglist = yb.whatProvides(rpath, None, None)
pkglist = set(map(lambda pkgobj: pkgobj.name, pkglist))
for pkg in pkglist:
sizedict[pkg] = sizedict.get(pkg, 0) + sizeinbytes
pkgdict[pkg] = pkgdict.get(pkg, []) + \
[(rpath, sizeinbytes, islink)]
# sort by size
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for pkg, _size in sorted(sizedict.items(), key=operator.itemgetter(1),
reverse=True):
for item in sorted(pkgdict[pkg]):
sys.stdout.write("%s\t%s\n" % (pkg, item))
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if __name__ == "__main__":
main(sys.argv)