714 lines
22 KiB
Python
Executable File
714 lines
22 KiB
Python
Executable File
#!/usr/bin/env python
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from __future__ import print_function
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"""
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This script parses each "meta" file and extracts the
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information needed to deduce build and src dependencies.
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It works much the same as the original shell script, but is
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*much* more efficient.
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The parsing work is handled by the class MetaFile.
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We only pay attention to a subset of the information in the
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"meta" files. Specifically:
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'CWD' to initialize our notion.
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'C' to track chdir(2) on a per process basis
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'R' files read are what we really care about.
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directories read, provide a clue to resolving
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subsequent relative paths. That is if we cannot find
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them relative to 'cwd', we check relative to the last
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dir read.
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'W' files opened for write or read-write,
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for filemon V3 and earlier.
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'E' files executed.
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'L' files linked
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'V' the filemon version, this record is used as a clue
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that we have reached the interesting bit.
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"""
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"""
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RCSid:
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$Id: meta2deps.py,v 1.18 2015/04/03 18:23:25 sjg Exp $
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Copyright (c) 2011-2013, Juniper Networks, Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""
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import os, re, sys
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def getv(dict, key, d=None):
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"""Lookup key in dict and return value or the supplied default."""
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if key in dict:
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return dict[key]
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return d
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def resolve(path, cwd, last_dir=None, debug=0, debug_out=sys.stderr):
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"""
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Return an absolute path, resolving via cwd or last_dir if needed.
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"""
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if path.endswith('/.'):
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path = path[0:-2]
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if len(path) > 0 and path[0] == '/':
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return path
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if path == '.':
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return cwd
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if path.startswith('./'):
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return cwd + path[1:]
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if last_dir == cwd:
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last_dir = None
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for d in [last_dir, cwd]:
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if not d:
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continue
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p = '/'.join([d,path])
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if debug > 2:
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print("looking for:", p, end=' ', file=debug_out)
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if not os.path.exists(p):
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if debug > 2:
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print("nope", file=debug_out)
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p = None
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continue
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if debug > 2:
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print("found:", p, file=debug_out)
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return p
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return None
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def abspath(path, cwd, last_dir=None, debug=0, debug_out=sys.stderr):
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"""
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Return an absolute path, resolving via cwd or last_dir if needed.
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this gets called a lot, so we try to avoid calling realpath
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until we know we have something.
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"""
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rpath = resolve(path, cwd, last_dir, debug, debug_out)
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if rpath:
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path = rpath
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if (path.find('/') < 0 or
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path.find('./') > 0 or
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path.endswith('/..') or
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os.path.islink(path)):
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return os.path.realpath(path)
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return path
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def sort_unique(list, cmp=None, key=None, reverse=False):
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list.sort(cmp, key, reverse)
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nl = []
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le = None
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for e in list:
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if e == le:
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continue
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nl.append(e)
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return nl
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def add_trims(x):
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return ['/' + x + '/',
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'/' + x,
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x + '/',
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x]
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class MetaFile:
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"""class to parse meta files generated by bmake."""
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conf = None
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dirdep_re = None
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host_target = None
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srctops = []
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objroots = []
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excludes = []
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seen = {}
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obj_deps = []
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src_deps = []
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file_deps = []
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def __init__(self, name, conf={}):
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"""if name is set we will parse it now.
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conf can have the follwing keys:
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SRCTOPS list of tops of the src tree(s).
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CURDIR the src directory 'bmake' was run from.
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RELDIR the relative path from SRCTOP to CURDIR
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MACHINE the machine we built for.
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set to 'none' if we are not cross-building.
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More specifically if machine cannot be deduced from objdirs.
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TARGET_SPEC
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Sometimes MACHINE isn't enough.
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HOST_TARGET
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when we build for the pseudo machine 'host'
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the object tree uses HOST_TARGET rather than MACHINE.
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OBJROOTS a list of the common prefix for all obj dirs it might
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end in '/' or '-'.
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DPDEPS names an optional file to which per file dependencies
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will be appended.
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For example if 'some/path/foo.h' is read from SRCTOP
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then 'DPDEPS_some/path/foo.h +=' "RELDIR" is output.
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This can allow 'bmake' to learn all the dirs within
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the tree that depend on 'foo.h'
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EXCLUDES
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A list of paths to ignore.
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ccache(1) can otherwise be trouble.
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debug desired debug level
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debug_out open file to send debug output to (sys.stderr)
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"""
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self.name = name
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self.debug = getv(conf, 'debug', 0)
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self.debug_out = getv(conf, 'debug_out', sys.stderr)
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self.machine = getv(conf, 'MACHINE', '')
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self.machine_arch = getv(conf, 'MACHINE_ARCH', '')
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self.target_spec = getv(conf, 'TARGET_SPEC', '')
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self.curdir = getv(conf, 'CURDIR')
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self.reldir = getv(conf, 'RELDIR')
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self.dpdeps = getv(conf, 'DPDEPS')
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self.line = 0
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if not self.conf:
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# some of the steps below we want to do only once
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self.conf = conf
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self.host_target = getv(conf, 'HOST_TARGET')
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for srctop in getv(conf, 'SRCTOPS', []):
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if srctop[-1] != '/':
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srctop += '/'
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if not srctop in self.srctops:
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self.srctops.append(srctop)
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_srctop = os.path.realpath(srctop)
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if _srctop[-1] != '/':
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_srctop += '/'
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if not _srctop in self.srctops:
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self.srctops.append(_srctop)
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trim_list = add_trims(self.machine)
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if self.machine == 'host':
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trim_list += add_trims(self.host_target)
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if self.target_spec:
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trim_list += add_trims(self.target_spec)
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for objroot in getv(conf, 'OBJROOTS', []):
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for e in trim_list:
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if objroot.endswith(e):
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# this is not what we want - fix it
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objroot = objroot[0:-len(e)]
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if e.endswith('/'):
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objroot += '/'
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if not objroot in self.objroots:
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self.objroots.append(objroot)
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_objroot = os.path.realpath(objroot)
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if objroot[-1] == '/':
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_objroot += '/'
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if not _objroot in self.objroots:
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self.objroots.append(_objroot)
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# we want the longest match
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self.srctops.sort(reverse=True)
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self.objroots.sort(reverse=True)
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self.excludes = getv(conf, 'EXCLUDES', [])
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if self.debug:
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print("host_target=", self.host_target, file=self.debug_out)
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print("srctops=", self.srctops, file=self.debug_out)
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print("objroots=", self.objroots, file=self.debug_out)
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print("excludes=", self.excludes, file=self.debug_out)
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self.dirdep_re = re.compile(r'([^/]+)/(.+)')
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if self.dpdeps and not self.reldir:
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if self.debug:
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print("need reldir:", end=' ', file=self.debug_out)
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if self.curdir:
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srctop = self.find_top(self.curdir, self.srctops)
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if srctop:
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self.reldir = self.curdir.replace(srctop,'')
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if self.debug:
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print(self.reldir, file=self.debug_out)
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if not self.reldir:
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self.dpdeps = None # we cannot do it?
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self.cwd = os.getcwd() # make sure this is initialized
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self.last_dir = self.cwd
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if name:
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self.try_parse()
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def reset(self):
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"""reset state if we are being passed meta files from multiple directories."""
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self.seen = {}
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self.obj_deps = []
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self.src_deps = []
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self.file_deps = []
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def dirdeps(self, sep='\n'):
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"""return DIRDEPS"""
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return sep.strip() + sep.join(self.obj_deps)
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def src_dirdeps(self, sep='\n'):
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"""return SRC_DIRDEPS"""
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return sep.strip() + sep.join(self.src_deps)
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def file_depends(self, out=None):
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"""Append DPDEPS_${file} += ${RELDIR}
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for each file we saw, to the output file."""
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if not self.reldir:
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return None
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for f in sort_unique(self.file_deps):
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print('DPDEPS_%s += %s' % (f, self.reldir), file=out)
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def seenit(self, dir):
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"""rememer that we have seen dir."""
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self.seen[dir] = 1
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def add(self, list, data, clue=''):
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"""add data to list if it isn't already there."""
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if data not in list:
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list.append(data)
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if self.debug:
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print("%s: %sAdd: %s" % (self.name, clue, data), file=self.debug_out)
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def find_top(self, path, list):
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"""the logical tree may be split across multiple trees"""
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for top in list:
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if path.startswith(top):
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if self.debug > 2:
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print("found in", top, file=self.debug_out)
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return top
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return None
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def find_obj(self, objroot, dir, path, input):
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"""return path within objroot, taking care of .dirdep files"""
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ddep = None
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for ddepf in [path + '.dirdep', dir + '/.dirdep']:
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if not ddep and os.path.exists(ddepf):
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ddep = open(ddepf, 'r').readline().strip('# \n')
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if self.debug > 1:
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print("found %s: %s\n" % (ddepf, ddep), file=self.debug_out)
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if ddep.endswith(self.machine):
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ddep = ddep[0:-(1+len(self.machine))]
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elif self.target_spec and ddep.endswith(self.target_spec):
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ddep = ddep[0:-(1+len(self.target_spec))]
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if not ddep:
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# no .dirdeps, so remember that we've seen the raw input
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self.seenit(input)
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self.seenit(dir)
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if self.machine == 'none':
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if dir.startswith(objroot):
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return dir.replace(objroot,'')
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return None
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m = self.dirdep_re.match(dir.replace(objroot,''))
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if m:
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ddep = m.group(2)
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dmachine = m.group(1)
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if dmachine != self.machine:
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if not (self.machine == 'host' and
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dmachine == self.host_target):
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if self.debug > 2:
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print("adding .%s to %s" % (dmachine, ddep), file=self.debug_out)
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ddep += '.' + dmachine
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return ddep
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def try_parse(self, name=None, file=None):
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"""give file and line number causing exception"""
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try:
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self.parse(name, file)
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except:
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# give a useful clue
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print('{}:{}: '.format(self.name, self.line), end=' ', file=sys.stderr)
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raise
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def parse(self, name=None, file=None):
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"""A meta file looks like:
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# Meta data file "path"
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CMD "command-line"
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CWD "cwd"
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TARGET "target"
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-- command output --
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-- filemon acquired metadata --
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# buildmon version 3
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V 3
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C "pid" "cwd"
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E "pid" "path"
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F "pid" "child"
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R "pid" "path"
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W "pid" "path"
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X "pid" "status"
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D "pid" "path"
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L "pid" "src" "target"
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M "pid" "old" "new"
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S "pid" "path"
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# Bye bye
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We go to some effort to avoid processing a dependency more than once.
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Of the above record types only C,E,F,L,R,V and W are of interest.
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"""
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version = 0 # unknown
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if name:
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self.name = name;
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if file:
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f = file
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cwd = self.last_dir = self.cwd
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else:
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f = open(self.name, 'r')
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skip = True
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pid_cwd = {}
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pid_last_dir = {}
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last_pid = 0
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self.line = 0
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if self.curdir:
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self.seenit(self.curdir) # we ignore this
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interesting = 'CEFLRV'
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for line in f:
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self.line += 1
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# ignore anything we don't care about
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if not line[0] in interesting:
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continue
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if self.debug > 2:
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print("input:", line, end=' ', file=self.debug_out)
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w = line.split()
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if skip:
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if w[0] == 'V':
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skip = False
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version = int(w[1])
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"""
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if version < 4:
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# we cannot ignore 'W' records
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# as they may be 'rw'
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interesting += 'W'
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"""
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elif w[0] == 'CWD':
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self.cwd = cwd = self.last_dir = w[1]
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self.seenit(cwd) # ignore this
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if self.debug:
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print("%s: CWD=%s" % (self.name, cwd), file=self.debug_out)
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continue
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pid = int(w[1])
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if pid != last_pid:
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if last_pid:
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pid_cwd[last_pid] = cwd
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pid_last_dir[last_pid] = self.last_dir
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cwd = getv(pid_cwd, pid, self.cwd)
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self.last_dir = getv(pid_last_dir, pid, self.cwd)
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last_pid = pid
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# process operations
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if w[0] == 'F':
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npid = int(w[2])
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pid_cwd[npid] = cwd
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pid_last_dir[npid] = cwd
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last_pid = npid
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continue
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elif w[0] == 'C':
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cwd = abspath(w[2], cwd, None, self.debug, self.debug_out)
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if cwd.endswith('/.'):
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cwd = cwd[0:-2]
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self.last_dir = cwd
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if self.debug > 1:
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print("cwd=", cwd, file=self.debug_out)
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continue
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if w[2] in self.seen:
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if self.debug > 2:
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print("seen:", w[2], file=self.debug_out)
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continue
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# file operations
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if w[0] in 'ML':
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# these are special, tread src as read and
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# target as write
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self.parse_path(w[1].strip("'"), cwd, 'R', w)
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self.parse_path(w[2].strip("'"), cwd, 'W', w)
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continue
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elif w[0] in 'ERWS':
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path = w[2]
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self.parse_path(path, cwd, w[0], w)
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if not file:
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f.close()
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def parse_path(self, path, cwd, op=None, w=[]):
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"""look at a path for the op specified"""
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if not op:
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op = w[0]
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# we are never interested in .dirdep files as dependencies
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if path.endswith('.dirdep'):
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return
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for p in self.excludes:
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if p and path.startswith(p):
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if self.debug > 2:
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print >> self.debug_out, "exclude:", p, path
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return
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# we don't want to resolve the last component if it is
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# a symlink
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path = resolve(path, cwd, self.last_dir, self.debug, self.debug_out)
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if not path:
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return
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dir,base = os.path.split(path)
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if dir in self.seen:
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if self.debug > 2:
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print("seen:", dir, file=self.debug_out)
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return
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# we can have a path in an objdir which is a link
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# to the src dir, we may need to add dependencies for each
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rdir = dir
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dir = abspath(dir, cwd, self.last_dir, self.debug, self.debug_out)
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if rdir == dir or rdir.find('./') > 0:
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rdir = None
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# now put path back together
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path = '/'.join([dir,base])
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if self.debug > 1:
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print("raw=%s rdir=%s dir=%s path=%s" % (w[2], rdir, dir, path), file=self.debug_out)
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if op in 'RWS':
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if path in [self.last_dir, cwd, self.cwd, self.curdir]:
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if self.debug > 1:
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print("skipping:", path, file=self.debug_out)
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return
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if os.path.isdir(path):
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if op in 'RW':
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|
self.last_dir = path;
|
|
if self.debug > 1:
|
|
print("ldir=", self.last_dir, file=self.debug_out)
|
|
return
|
|
|
|
if op in 'ERW':
|
|
# finally, we get down to it
|
|
if dir == self.cwd or dir == self.curdir:
|
|
return
|
|
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:
|
|
return
|
|
|
|
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)
|
|
|
|
|
|
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': [],
|
|
'EXCLUDES': [],
|
|
}
|
|
|
|
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:X:' + 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 o == '-X':
|
|
if a not in conf['EXCLUDES']:
|
|
conf['EXCLUDES'].append(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("config:", file=debug_out)
|
|
print("psyco=", have_psyco, file=debug_out)
|
|
for k,v in list(conf.items()):
|
|
print("%s=%s" % (k,v), file=debug_out)
|
|
|
|
m = None
|
|
for a in args:
|
|
if a.endswith('.meta'):
|
|
if not os.path.exists(a):
|
|
continue
|
|
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():
|
|
if not os.path.exists(f):
|
|
continue
|
|
m = klass(f, conf)
|
|
|
|
if output and m:
|
|
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
|
|
|