#!/usr/bin/env python
"""
This script parses each "meta" file and extracts the
information needed to deduce build and src dependencies.
It works much the same as the original shell script, but is
*much* more efficient.
The parsing work is handled by the class MetaFile.
We only pay attention to a subset of the information in the
"meta" files. Specifically:
'CWD' to initialize our notion.
'C' to track chdir(2) on a per process basis
'R' files read are what we really care about.
directories read, provide a clue to resolving
subsequent relative paths. That is if we cannot find
them relative to 'cwd', we check relative to the last
dir read.
'W' files opened for write or read-write,
for filemon V3 and earlier.
'E' files executed.
'L' files linked
'V' the filemon version, this record is used as a clue
that we have reached the interesting bit.
"""
"""
RCSid:
$Id: meta2deps.py,v 1.15 2013/07/29 20:41:23 sjg Exp $
Copyright (c) 2011-2013, Juniper Networks, Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""
import os, re, sys
def getv(dict, key, d=None):
"""Lookup key in dict and return value or the supplied default."""
if key in dict:
return dict[key]
return d
def resolve(path, cwd, last_dir=None, debug=0, debug_out=sys.stderr):
"""
Return an absolute path, resolving via cwd or last_dir if needed.
"""
if path.endswith('/.'):
path = path[0:-2]
if len(path) > 0 and path[0] == '/':
return path
if path == '.':
return cwd
if path.startswith('./'):
return cwd + path[1:]
if last_dir == cwd:
last_dir = None
for d in [last_dir, cwd]:
if not d:
continue
p = '/'.join([d,path])
if debug > 2:
print >> debug_out, "looking for:", p,
if not os.path.exists(p):
if debug > 2:
print >> debug_out, "nope"
p = None
continue
if debug > 2:
print >> debug_out, "found:", p
return p
return None
def abspath(path, cwd, last_dir=None, debug=0, debug_out=sys.stderr):
"""
Return an absolute path, resolving via cwd or last_dir if needed.
this gets called a lot, so we try to avoid calling realpath
until we know we have something.
"""
rpath = resolve(path, cwd, last_dir, debug, debug_out)
if rpath:
path = rpath
if (path.find('./') > 0 or
path.endswith('/..') or
os.path.islink(path)):
return os.path.realpath(path)
return path
def sort_unique(list, cmp=None, key=None, reverse=False):
list.sort(cmp, key, reverse)
nl = []
le = None
for e in list:
if e == le:
continue
nl.append(e)
return nl
def add_trims(x):
return ['/' + x + '/',
'/' + x,
x + '/',
x]
class MetaFile:
"""class to parse meta files generated by bmake."""
conf = None
dirdep_re = None
host_target = None
srctops = []
objroots = []
seen = {}
obj_deps = []
src_deps = []
file_deps = []
def __init__(self, name, conf={}):
"""if name is set we will parse it now.
conf can have the follwing keys:
SRCTOPS list of tops of the src tree(s).
CURDIR the src directory 'bmake' was run from.
RELDIR the relative path from SRCTOP to CURDIR
MACHINE the machine we built for.
set to 'none' if we are not cross-building.
More specifically if machine cannot be deduced from objdirs.
TARGET_SPEC
Sometimes MACHINE isn't enough.
HOST_TARGET
when we build for the psuedo machine 'host'
the object tree uses HOST_TARGET rather than MACHINE.
OBJROOTS a list of the common prefix for all obj dirs it might
end in '/' or '-'.
DPDEPS names an optional file to which per file dependencies
will be appended.
For example if 'some/path/foo.h' is read from SRCTOP
then 'DPDEPS_some/path/foo.h +=' "RELDIR" is output.
This can allow 'bmake' to learn all the dirs within
the tree that depend on 'foo.h'
debug desired debug level
debug_out open file to send debug output to (sys.stderr)
"""
self.name = name
self.debug = getv(conf, 'debug', 0)
self.debug_out = getv(conf, 'debug_out', sys.stderr)
self.machine = getv(conf, 'MACHINE', '')
self.machine_arch = getv(conf, 'MACHINE_ARCH', '')
self.target_spec = getv(conf, 'TARGET_SPEC', '')
self.curdir = getv(conf, 'CURDIR')
self.reldir = getv(conf, 'RELDIR')
self.dpdeps = getv(conf, 'DPDEPS')
self.line = 0
if not self.conf:
# some of the steps below we want to do only once
self.conf = conf
self.host_target = getv(conf, 'HOST_TARGET')
for srctop in getv(conf, 'SRCTOPS', []):
if srctop[-1] != '/':
srctop += '/'
if not srctop in self.srctops:
self.srctops.append(srctop)
_srctop = os.path.realpath(srctop)
if _srctop[-1] != '/':
_srctop += '/'
if not _srctop in self.srctops:
self.srctops.append(_srctop)
trim_list = add_trims(self.machine)
if self.machine == 'host':
trim_list += add_trims(self.host_target)
if self.target_spec:
trim_list += add_trims(self.target_spec)
for objroot in getv(conf, 'OBJROOTS', []):
for e in trim_list:
if objroot.endswith(e):
# this is not what we want - fix it
objroot = objroot[0:-len(e)]
if e.endswith('/'):
objroot += '/'
if not objroot in self.objroots:
self.objroots.append(objroot)
_objroot = os.path.realpath(objroot)
if objroot[-1] == '/':
_objroot += '/'
if not _objroot in self.objroots:
self.objroots.append(_objroot)
# we want the longest match
self.srctops.sort(reverse=True)
self.objroots.sort(reverse=True)
if self.debug:
print >> self.debug_out, "host_target=", self.host_target
print >> self.debug_out, "srctops=", self.srctops
print >> self.debug_out, "objroots=", self.objroots
self.dirdep_re = re.compile(r'([^/]+)/(.+)')
if self.dpdeps and not self.reldir:
if self.debug:
print >> self.debug_out, "need reldir:",
if self.curdir:
srctop = self.find_top(self.curdir, self.srctops)
if srctop:
self.reldir = self.curdir.replace(srctop,'')
if self.debug:
print >> self.debug_out, self.reldir
if not self.reldir:
self.dpdeps = None # we cannot do it?
self.cwd = os.getcwd() # make sure this is initialized
if name:
self.try_parse()
def reset(self):
"""reset state if we are being passed meta files from multiple directories."""
self.seen = {}
self.obj_deps = []
self.src_deps = []
self.file_deps = []
def dirdeps(self, sep='\n'):
"""return DIRDEPS"""
return sep.strip() + sep.join(self.obj_deps)
def src_dirdeps(self, sep='\n'):
"""return SRC_DIRDEPS"""
return sep.strip() + sep.join(self.src_deps)
def file_depends(self, out=None):
"""Append DPDEPS_${file} += ${RELDIR}
for each file we saw, to the output file."""
if not self.reldir:
return None
for f in sort_unique(self.file_deps):
print >> out, 'DPDEPS_%s += %s' % (f, self.reldir)
def seenit(self, dir):
"""rememer that we have seen dir."""
self.seen[dir] = 1
def add(self, list, data, clue=''):
"""add data to list if it isn't already there."""
if data not in list:
list.append(data)
if self.debug:
print >> self.debug_out, "%s: %sAdd: %s" % (self.name, clue, data)
def find_top(self, path, list):
"""the logical tree may be split accross multiple trees"""
for top in list:
if path.startswith(top):
if self.debug > 2:
print >> self.debug_out, "found in", top
return top
return None
def find_obj(self, objroot, dir, path, input):
"""return path within objroot, taking care of .dirdep files"""
ddep = None
for ddepf in [path + '.dirdep', dir + '/.dirdep']:
if not ddep and os.path.exists(ddepf):
ddep = open(ddepf, 'rb').readline().strip('# \n')
if self.debug > 1:
print >> self.debug_out, "found %s: %s\n" % (ddepf, ddep)
if ddep.endswith(self.machine):
ddep = ddep[0:-(1+len(self.machine))]
elif self.target_spec and ddep.endswith(self.target_spec):
ddep = ddep[0:-(1+len(self.target_spec))]
if not ddep:
# no .dirdeps, so remember that we've seen the raw input
self.seenit(input)
self.seenit(dir)
if self.machine == 'none':
if dir.startswith(objroot):
return dir.replace(objroot,'')
return None
m = self.dirdep_re.match(dir.replace(objroot,''))
if m:
ddep = m.group(2)
dmachine = m.group(1)
if dmachine != self.machine:
if not (self.machine == 'host' and
dmachine == self.host_target):
if self.debug > 2:
print >> self.debug_out, "adding .%s to %s" % (dmachine, ddep)
ddep += '.' + dmachine
return ddep
def try_parse(self, name=None, file=None):
"""give file and line number causing exception"""
try:
self.parse(name, file)
except:
# give a useful clue
print >> sys.stderr, '{}:{}: '.format(self.name, self.line),
raise
def parse(self, name=None, file=None):
"""A meta file looks like:
# Meta data file "path"
CMD "command-line"
CWD "cwd"
TARGET "target"
-- command output --
-- filemon acquired metadata --
# buildmon version 3
V 3
C "pid" "cwd"
E "pid" "path"
F "pid" "child"
R "pid" "path"
W "pid" "path"
X "pid" "status"
D "pid" "path"
L "pid" "src" "target"
M "pid" "old" "new"
S "pid" "path"
# Bye bye
We go to some effort to avoid processing a dependency more than once.
Of the above record types only C,E,F,L,R,V and W are of interest.
"""
version = 0 # unknown
if name:
self.name = name;
if file:
f = file
cwd = last_dir = self.cwd
else:
f = open(self.name, 'rb')
skip = True
pid_cwd = {}
pid_last_dir = {}
last_pid = 0
self.line = 0
if self.curdir:
self.seenit(self.curdir) # we ignore this
interesting = 'CEFLRV'
for line in f:
self.line += 1
# ignore anything we don't care about
if not line[0] in interesting:
continue
if self.debug > 2:
print >> self.debug_out, "input:", line,
w = line.split()
if skip:
if w[0] == 'V':
skip = False
version = int(w[1])
"""
if version < 4:
# we cannot ignore 'W' records
# as they may be 'rw'
interesting += 'W'
"""
elif w[0] == 'CWD':
self.cwd = cwd = last_dir = w[1]
self.seenit(cwd) # ignore this
if self.debug:
print >> self.debug_out, "%s: CWD=%s" % (self.name, cwd)
continue
pid = int(w[1])
if pid != last_pid:
if last_pid:
pid_cwd[last_pid] = cwd
pid_last_dir[last_pid] = last_dir
cwd = getv(pid_cwd, pid, self.cwd)
last_dir = getv(pid_last_dir, pid, self.cwd)
last_pid = pid
# process operations
if w[0] == 'F':
npid = int(w[2])
pid_cwd[npid] = cwd
pid_last_dir[npid] = cwd
last_pid = npid
continue
elif w[0] == 'C':
cwd = abspath(w[2], cwd, None, self.debug, self.debug_out)
if cwd.endswith('/.'):
cwd = cwd[0:-2]
last_dir = cwd
if self.debug > 1:
print >> self.debug_out, "cwd=", cwd
continue
if w[2] in self.seen:
if self.debug > 2:
print >> self.debug_out, "seen:", w[2]
continue
# file operations
if w[0] in 'ML':
path = w[2].strip("'")
else:
path = w[2]
# we are never interested in .dirdep files as dependencies
if path.endswith('.dirdep'):
continue
# we don't want to resolve the last component if it is
# a symlink
path = resolve(path, cwd, last_dir, self.debug, self.debug_out)
if not path:
continue
dir,base = os.path.split(path)
if dir in self.seen:
if self.debug > 2:
print >> self.debug_out, "seen:", dir
continue
# we can have a path in an objdir which is a link
# to the src dir, we may need to add dependencies for each
rdir = dir
dir = abspath(dir, cwd, last_dir, self.debug, self.debug_out)
if rdir == dir or rdir.find('./') > 0:
rdir = None
# now put path back together
path = '/'.join([dir,base])
if self.debug > 1:
print >> self.debug_out, "raw=%s rdir=%s dir=%s path=%s" % (w[2], rdir, dir, path)
if w[0] in 'SRWL':
if w[0] == 'W' and path.endswith('.dirdep'):
continue
if path in [last_dir, cwd, self.cwd, self.curdir]:
if self.debug > 1:
print >> self.debug_out, "skipping:", path
continue
if os.path.isdir(path):
if w[0] in 'RW':
last_dir = path;
if self.debug > 1:
print >> self.debug_out, "ldir=", last_dir
continue
if w[0] in 'REWML':
# finally, we get down to it
if dir == self.cwd or dir == self.curdir:
continue
srctop = self.find_top(path, self.srctops)
if srctop:
if self.dpdeps:
self.add(self.file_deps, path.replace(srctop,''), 'file')
self.add(self.src_deps, dir.replace(srctop,''), 'src')
self.seenit(w[2])
self.seenit(dir)
if rdir and not rdir.startswith(srctop):
dir = rdir # for below
rdir = None
else:
continue
objroot = None
for dir in [dir,rdir]:
if not dir:
continue
objroot = self.find_top(dir, self.objroots)
if objroot:
break
if objroot:
ddep = self.find_obj(objroot, dir, path, w[2])
if ddep:
self.add(self.obj_deps, ddep, 'obj')
else:
# don't waste time looking again
self.seenit(w[2])
self.seenit(dir)
if not file:
f.close()
def main(argv, klass=MetaFile, xopts='', xoptf=None):
"""Simple driver for class MetaFile.
Usage:
script [options] [key=value ...] "meta" ...
Options and key=value pairs contribute to the
dictionary passed to MetaFile.
-S "SRCTOP"
add "SRCTOP" to the "SRCTOPS" list.
-C "CURDIR"
-O "OBJROOT"
add "OBJROOT" to the "OBJROOTS" list.
-m "MACHINE"
-a "MACHINE_ARCH"
-H "HOST_TARGET"
-D "DPDEPS"
-d bumps debug level
"""
import getopt
# import Psyco if we can
# it can speed things up quite a bit
have_psyco = 0
try:
import psyco
psyco.full()
have_psyco = 1
except:
pass
conf = {
'SRCTOPS': [],
'OBJROOTS': [],
}
try:
machine = os.environ['MACHINE']
if machine:
conf['MACHINE'] = machine
machine_arch = os.environ['MACHINE_ARCH']
if machine_arch:
conf['MACHINE_ARCH'] = machine_arch
srctop = os.environ['SB_SRC']
if srctop:
conf['SRCTOPS'].append(srctop)
objroot = os.environ['SB_OBJROOT']
if objroot:
conf['OBJROOTS'].append(objroot)
except:
pass
debug = 0
output = True
opts, args = getopt.getopt(argv[1:], 'a:dS:C:O:R:m:D:H:qT:' + xopts)
for o, a in opts:
if o == '-a':
conf['MACHINE_ARCH'] = a
elif o == '-d':
debug += 1
elif o == '-q':
output = False
elif o == '-H':
conf['HOST_TARGET'] = a
elif o == '-S':
if a not in conf['SRCTOPS']:
conf['SRCTOPS'].append(a)
elif o == '-C':
conf['CURDIR'] = a
elif o == '-O':
if a not in conf['OBJROOTS']:
conf['OBJROOTS'].append(a)
elif o == '-R':
conf['RELDIR'] = a
elif o == '-D':
conf['DPDEPS'] = a
elif o == '-m':
conf['MACHINE'] = a
elif o == '-T':
conf['TARGET_SPEC'] = a
elif xoptf:
xoptf(o, a, conf)
conf['debug'] = debug
# get any var=val assignments
eaten = []
for a in args:
if a.find('=') > 0:
k,v = a.split('=')
if k in ['SRCTOP','OBJROOT','SRCTOPS','OBJROOTS']:
if k == 'SRCTOP':
k = 'SRCTOPS'
elif k == 'OBJROOT':
k = 'OBJROOTS'
if v not in conf[k]:
conf[k].append(v)
else:
conf[k] = v
eaten.append(a)
continue
break
for a in eaten:
args.remove(a)
debug_out = getv(conf, 'debug_out', sys.stderr)
if debug:
print >> debug_out, "config:"
print >> debug_out, "psyco=", have_psyco
for k,v in conf.items():
print >> debug_out, "%s=%s" % (k,v)
for a in args:
if a.endswith('.meta'):
m = klass(a, conf)
elif a.startswith('@'):
# there can actually multiple files per line
for line in open(a[1:]):
for f in line.strip().split():
m = klass(f, conf)
if output:
print m.dirdeps()
print m.src_dirdeps('\nsrc:')
dpdeps = getv(conf, 'DPDEPS')
if dpdeps:
m.file_depends(open(dpdeps, 'wb'))
return m
if __name__ == '__main__':
try:
main(sys.argv)
except:
# yes, this goes to stdout
print "ERROR: ", sys.exc_info()[1]
raise