Initial population

git-svn-id: https://svn.o-hand.com/repos/poky@2 311d38ba-8fff-0310-9ca6-ca027cbcb966

1 files changed, 1266 insertions, 0 deletions

diff --git a/bitbake/lib/bb/__init__.py b/bitbake/lib/bb/__init__.py
new file mode 100644
index 0000000000..00b0e8b57f
--- /dev/null
+++ b/bitbake/lib/bb/__init__.py
@@ -0,0 +1,1266 @@
+#!/usr/bin/python
+# ex:ts=4:sw=4:sts=4:et
+# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
+"""
+BitBake Build System Python Library
+
+Copyright (C) 2003  Holger Schurig
+Copyright (C) 2003, 2004  Chris Larson
+
+Based on Gentoo's portage.py.
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA.
+"""
+
+__version__ = "1.3.2"
+
+__all__ = [
+
+    "debug",
+    "note",
+    "error",
+    "fatal",
+
+    "mkdirhier",
+    "movefile",
+
+    "tokenize",
+    "evaluate",
+    "flatten",
+    "relparse",
+    "ververify",
+    "isjustname",
+    "isspecific",
+    "pkgsplit",
+    "catpkgsplit",
+    "vercmp",
+    "pkgcmp",
+    "dep_parenreduce",
+    "dep_opconvert",
+    "digraph",
+
+# fetch
+    "decodeurl",
+    "encodeurl",
+
+# modules
+    "parse",
+    "data",
+    "event",
+    "build",
+    "fetch",
+    "manifest"
+ ]
+
+whitespace = '\t\n\x0b\x0c\r '
+lowercase = 'abcdefghijklmnopqrstuvwxyz'
+
+import sys, os, types, re, string
+
+#projectdir = os.path.dirname(os.path.dirname(os.path.abspath(sys.argv[0])))
+projectdir = os.getcwd()
+
+debug_level = 0
+
+if "BBDEBUG" in os.environ:
+    level = int(os.environ["BBDEBUG"])
+    if level:
+        debug_level = level
+    else:
+        debug_level = 0
+
+class VarExpandError(Exception):
+    pass
+
+class MalformedUrl(Exception):
+    """Exception raised when encountering an invalid url"""
+
+
+#######################################################################
+#######################################################################
+#
+# SECTION: Debug
+#
+# PURPOSE: little functions to make yourself known
+#
+#######################################################################
+#######################################################################
+
+debug_prepend = ''
+
+
+def debug(lvl, *args):
+    if debug_level >= lvl:
+        print debug_prepend + 'DEBUG:', ''.join(args)
+
+def note(*args):
+    print debug_prepend + 'NOTE:', ''.join(args)
+
+def error(*args):
+    print debug_prepend + 'ERROR:', ''.join(args)
+
+def fatal(*args):
+    print debug_prepend + 'ERROR:', ''.join(args)
+    sys.exit(1)
+
+
+#######################################################################
+#######################################################################
+#
+# SECTION: File
+#
+# PURPOSE: Basic file and directory tree related functions
+#
+#######################################################################
+#######################################################################
+
+def mkdirhier(dir):
+    """Create a directory like 'mkdir -p', but does not complain if
+    directory already exists like os.makedirs
+    """
+
+    debug(3, "mkdirhier(%s)" % dir)
+    try:
+        os.makedirs(dir)
+        debug(2, "created " + dir)
+    except OSError, e:
+        if e.errno != 17: raise e
+
+
+#######################################################################
+
+import stat
+
+def movefile(src,dest,newmtime=None,sstat=None):
+    """Moves a file from src to dest, preserving all permissions and
+    attributes; mtime will be preserved even when moving across
+    filesystems.  Returns true on success and false on failure. Move is
+    atomic.
+    """
+
+    #print "movefile("+src+","+dest+","+str(newmtime)+","+str(sstat)+")"
+    try:
+        if not sstat:
+            sstat=os.lstat(src)
+    except Exception, e:
+        print "!!! Stating source file failed... movefile()"
+        print "!!!",e
+        return None
+
+    destexists=1
+    try:
+        dstat=os.lstat(dest)
+    except:
+        dstat=os.lstat(os.path.dirname(dest))
+        destexists=0
+
+    if destexists:
+        if stat.S_ISLNK(dstat[stat.ST_MODE]):
+            try:
+                os.unlink(dest)
+                destexists=0
+            except Exception, e:
+                pass
+
+    if stat.S_ISLNK(sstat[stat.ST_MODE]):
+        try:
+            target=os.readlink(src)
+            if destexists and not stat.S_ISDIR(dstat[stat.ST_MODE]):
+                os.unlink(dest)
+            os.symlink(target,dest)
+#            os.lchown(dest,sstat[stat.ST_UID],sstat[stat.ST_GID])
+            os.unlink(src)
+            return os.lstat(dest)
+        except Exception, e:
+            print "!!! failed to properly create symlink:"
+            print "!!!",dest,"->",target
+            print "!!!",e
+            return None
+
+    renamefailed=1
+    if sstat[stat.ST_DEV]==dstat[stat.ST_DEV]:
+        try:
+            ret=os.rename(src,dest)
+            renamefailed=0
+        except Exception, e:
+            import errno
+            if e[0]!=errno.EXDEV:
+                # Some random error.
+                print "!!! Failed to move",src,"to",dest
+                print "!!!",e
+                return None
+            # Invalid cross-device-link 'bind' mounted or actually Cross-Device
+
+    if renamefailed:
+        didcopy=0
+        if stat.S_ISREG(sstat[stat.ST_MODE]):
+            try: # For safety copy then move it over.
+                shutil.copyfile(src,dest+"#new")
+                os.rename(dest+"#new",dest)
+                didcopy=1
+            except Exception, e:
+                print '!!! copy',src,'->',dest,'failed.'
+                print "!!!",e
+                return None
+        else:
+            #we don't yet handle special, so we need to fall back to /bin/mv
+            a=getstatusoutput("/bin/mv -f "+"'"+src+"' '"+dest+"'")
+            if a[0]!=0:
+                print "!!! Failed to move special file:"
+                print "!!! '"+src+"' to '"+dest+"'"
+                print "!!!",a
+                return None # failure
+        try:
+            if didcopy:
+                missingos.lchown(dest,sstat[stat.ST_UID],sstat[stat.ST_GID])
+                os.chmod(dest, stat.S_IMODE(sstat[stat.ST_MODE])) # Sticky is reset on chown
+                os.unlink(src)
+        except Exception, e:
+            print "!!! Failed to chown/chmod/unlink in movefile()"
+            print "!!!",dest
+            print "!!!",e
+            return None
+
+    if newmtime:
+        os.utime(dest,(newmtime,newmtime))
+    else:
+        os.utime(dest, (sstat[stat.ST_ATIME], sstat[stat.ST_MTIME]))
+        newmtime=sstat[stat.ST_MTIME]
+    return newmtime
+
+
+
+#######################################################################
+#######################################################################
+#
+# SECTION: Download
+#
+# PURPOSE: Download via HTTP, FTP, CVS, BITKEEPER, handling of MD5-signatures
+#          and mirrors
+#
+#######################################################################
+#######################################################################
+
+def decodeurl(url):
+    """Decodes an URL into the tokens (scheme, network location, path,
+    user, password, parameters).
+
+    >>> decodeurl("http://www.google.com/index.html")
+    ('http', 'www.google.com', '/index.html', '', '', {})
+
+    CVS url with username, host and cvsroot. The cvs module to check out is in the
+    parameters:
+
+    >>> decodeurl("cvs://anoncvs@cvs.handhelds.org/cvs;module=familiar/dist/ipkg")
+    ('cvs', 'cvs.handhelds.org', '/cvs', 'anoncvs', '', {'module': 'familiar/dist/ipkg'})
+
+    Dito, but this time the username has a password part. And we also request a special tag
+    to check out.
+
+    >>> decodeurl("cvs://anoncvs:anonymous@cvs.handhelds.org/cvs;module=familiar/dist/ipkg;tag=V0-99-81")
+    ('cvs', 'cvs.handhelds.org', '/cvs', 'anoncvs', 'anonymous', {'tag': 'V0-99-81', 'module': 'familiar/dist/ipkg'})
+    """
+
+    m = re.compile('(?P<type>[^:]*)://((?P<user>.+)@)?(?P<location>[^;]+)(;(?P<parm>.*))?').match(url)
+    if not m:
+        raise MalformedUrl(url)
+
+    type = m.group('type')
+    location = m.group('location')
+    if not location:
+        raise MalformedUrl(url)
+    user = m.group('user')
+    parm = m.group('parm')
+    m = re.compile('(?P<host>[^/;]+)(?P<path>/[^;]+)').match(location)
+    if m:
+        host = m.group('host')
+        path = m.group('path')
+    else:
+        host = ""
+        path = location
+    if user:
+        m = re.compile('(?P<user>[^:]+)(:?(?P<pswd>.*))').match(user)
+        if m:
+            user = m.group('user')
+            pswd = m.group('pswd')
+    else:
+        user = ''
+        pswd = ''
+
+    p = {}
+    if parm:
+        for s in parm.split(';'):
+            s1,s2 = s.split('=')
+            p[s1] = s2
+
+    return (type, host, path, user, pswd, p)
+
+#######################################################################
+
+def encodeurl(decoded):
+    """Encodes a URL from tokens (scheme, network location, path,
+    user, password, parameters).
+
+    >>> encodeurl(['http', 'www.google.com', '/index.html', '', '', {}])
+    'http://www.google.com/index.html'
+
+    CVS with username, host and cvsroot. The cvs module to check out is in the
+    parameters:
+
+    >>> encodeurl(['cvs', 'cvs.handhelds.org', '/cvs', 'anoncvs', '', {'module': 'familiar/dist/ipkg'}])
+    'cvs://anoncvs@cvs.handhelds.org/cvs;module=familiar/dist/ipkg'
+
+    Dito, but this time the username has a password part. And we also request a special tag
+    to check out.
+
+    >>> encodeurl(['cvs', 'cvs.handhelds.org', '/cvs', 'anoncvs', 'anonymous', {'tag': 'V0-99-81', 'module': 'familiar/dist/ipkg'}])
+    'cvs://anoncvs:anonymous@cvs.handhelds.org/cvs;tag=V0-99-81;module=familiar/dist/ipkg'
+    """
+
+    (type, host, path, user, pswd, p) = decoded
+
+    if not type or not path:
+        fatal("invalid or missing parameters for url encoding")
+    url = '%s://' % type
+    if user:
+        url += "%s" % user
+        if pswd:
+            url += ":%s" % pswd
+        url += "@"
+    if host:
+        url += "%s" % host
+    url += "%s" % path
+    if p:
+        for parm in p.keys():
+            url += ";%s=%s" % (parm, p[parm])
+
+    return url
+
+#######################################################################
+
+def which(path, item, direction = 0):
+    """Useful function for locating a file in a PATH"""
+    found = ""
+    for p in (path or "").split(':'):
+        if os.path.exists(os.path.join(p, item)):
+            found = os.path.join(p, item)
+            if direction == 0:
+                break
+    return found
+
+#######################################################################
+
+
+
+
+#######################################################################
+#######################################################################
+#
+# SECTION: Dependency
+#
+# PURPOSE: Compare build & run dependencies
+#
+#######################################################################
+#######################################################################
+
+def tokenize(mystring):
+    """Breaks a string like 'foo? (bar) oni? (blah (blah))' into (possibly embedded) lists:
+
+    >>> tokenize("x")
+    ['x']
+    >>> tokenize("x y")
+    ['x', 'y']
+    >>> tokenize("(x y)")
+    [['x', 'y']]
+    >>> tokenize("(x y) b c")
+    [['x', 'y'], 'b', 'c']
+    >>> tokenize("foo? (bar) oni? (blah (blah))")
+    ['foo?', ['bar'], 'oni?', ['blah', ['blah']]]
+    >>> tokenize("sys-apps/linux-headers nls? (sys-devel/gettext)")
+    ['sys-apps/linux-headers', 'nls?', ['sys-devel/gettext']]
+    """
+
+    newtokens = []
+    curlist   = newtokens
+    prevlists = []
+    level     = 0
+    accum     = ""
+    for x in mystring:
+        if x=="(":
+            if accum:
+                curlist.append(accum)
+                accum=""
+            prevlists.append(curlist)
+            curlist=[]
+            level=level+1
+        elif x==")":
+            if accum:
+                curlist.append(accum)
+                accum=""
+            if level==0:
+                print "!!! tokenizer: Unmatched left parenthesis in:\n'"+mystring+"'"
+                return None
+            newlist=curlist
+            curlist=prevlists.pop()
+            curlist.append(newlist)
+            level=level-1
+        elif x in whitespace:
+            if accum:
+                curlist.append(accum)
+                accum=""
+        else:
+            accum=accum+x
+    if accum:
+        curlist.append(accum)
+    if (level!=0):
+        print "!!! tokenizer: Exiting with unterminated parenthesis in:\n'"+mystring+"'"
+        return None
+    return newtokens
+
+
+#######################################################################
+
+def evaluate(tokens,mydefines,allon=0):
+    """Removes tokens based on whether conditional definitions exist or not.
+    Recognizes !
+
+    >>> evaluate(['sys-apps/linux-headers', 'nls?', ['sys-devel/gettext']], {})
+    ['sys-apps/linux-headers']
+
+    Negate the flag:
+
+    >>> evaluate(['sys-apps/linux-headers', '!nls?', ['sys-devel/gettext']], {})
+    ['sys-apps/linux-headers', ['sys-devel/gettext']]
+
+    Define 'nls':
+
+    >>> evaluate(['sys-apps/linux-headers', 'nls?', ['sys-devel/gettext']], {"nls":1})
+    ['sys-apps/linux-headers', ['sys-devel/gettext']]
+
+    Turn allon on:
+
+    >>> evaluate(['sys-apps/linux-headers', 'nls?', ['sys-devel/gettext']], {}, True)
+    ['sys-apps/linux-headers', ['sys-devel/gettext']]
+    """
+
+    if tokens == None:
+        return None
+    mytokens = tokens + []        # this copies the list
+    pos = 0
+    while pos < len(mytokens):
+        if type(mytokens[pos]) == types.ListType:
+            evaluate(mytokens[pos], mydefines)
+            if not len(mytokens[pos]):
+                del mytokens[pos]
+                continue
+        elif mytokens[pos][-1] == "?":
+            cur = mytokens[pos][:-1]
+            del mytokens[pos]
+            if allon:
+                if cur[0] == "!":
+                    del mytokens[pos]
+            else:
+                if cur[0] == "!":
+                    if (cur[1:] in mydefines) and (pos < len(mytokens)):
+                        del mytokens[pos]
+                        continue
+                elif (cur not in mydefines) and (pos < len(mytokens)):
+                    del mytokens[pos]
+                    continue
+        pos = pos + 1
+    return mytokens
+
+
+#######################################################################
+
+def flatten(mytokens):
+    """Converts nested arrays into a flat arrays:
+
+    >>> flatten([1,[2,3]])
+    [1, 2, 3]
+    >>> flatten(['sys-apps/linux-headers', ['sys-devel/gettext']])
+    ['sys-apps/linux-headers', 'sys-devel/gettext']
+    """
+
+    newlist=[]
+    for x in mytokens:
+        if type(x)==types.ListType:
+            newlist.extend(flatten(x))
+        else:
+            newlist.append(x)
+    return newlist
+
+
+#######################################################################
+
+_package_weights_ = {"pre":-2,"p":0,"alpha":-4,"beta":-3,"rc":-1}    # dicts are unordered
+_package_ends_    = ["pre", "p", "alpha", "beta", "rc", "cvs", "bk", "HEAD" ]            # so we need ordered list
+
+def relparse(myver):
+    """Parses the last elements of a version number into a triplet, that can
+    later be compared:
+
+    >>> relparse('1.2_pre3')
+    [1.2, -2, 3.0]
+    >>> relparse('1.2b')
+    [1.2, 98, 0]
+    >>> relparse('1.2')
+    [1.2, 0, 0]
+    """
+
+    number   = 0
+    p1       = 0
+    p2       = 0
+    mynewver = myver.split('_')
+    if len(mynewver)==2:
+        # an _package_weights_
+        number = float(mynewver[0])
+        match = 0
+        for x in _package_ends_:
+            elen = len(x)
+            if mynewver[1][:elen] == x:
+                match = 1
+                p1 = _package_weights_[x]
+                try:
+                    p2 = float(mynewver[1][elen:])
+                except:
+                    p2 = 0
+                break
+        if not match:
+            # normal number or number with letter at end
+            divider = len(myver)-1
+            if myver[divider:] not in "1234567890":
+                # letter at end
+                p1 = ord(myver[divider:])
+                number = float(myver[0:divider])
+            else:
+                number = float(myver)
+    else:
+        # normal number or number with letter at end
+        divider = len(myver)-1
+        if myver[divider:] not in "1234567890":
+            #letter at end
+            p1     = ord(myver[divider:])
+            number = float(myver[0:divider])
+        else:
+            number = float(myver)
+    return [number,p1,p2]
+
+
+#######################################################################
+
+__ververify_cache__ = {}
+
+def ververify(myorigval,silent=1):
+    """Returns 1 if given a valid version string, els 0. Valid versions are in the format
+
+    <v1>.<v2>...<vx>[a-z,_{_package_weights_}[vy]]
+
+    >>> ververify('2.4.20')
+    1
+    >>> ververify('2.4..20')        # two dots
+    0
+    >>> ververify('2.x.20')            # 'x' is not numeric
+    0
+    >>> ververify('2.4.20a')
+    1
+    >>> ververify('2.4.20cvs')        # only one trailing letter
+    0
+    >>> ververify('1a')
+    1
+    >>> ververify('test_a')            # no version at all
+    0
+    >>> ververify('2.4.20_beta1')
+    1
+    >>> ververify('2.4.20_beta')
+    1
+    >>> ververify('2.4.20_wrongext')    # _wrongext is no valid trailer
+    0
+    """
+
+    # Lookup the cache first
+    try:
+        return __ververify_cache__[myorigval]
+    except KeyError:
+        pass
+
+    if len(myorigval) == 0:
+        if not silent:
+            error("package version is empty")
+        __ververify_cache__[myorigval] = 0
+        return 0
+    myval = myorigval.split('.')
+    if len(myval)==0:
+        if not silent:
+            error("package name has empty version string")
+        __ververify_cache__[myorigval] = 0
+        return 0
+    # all but the last version must be a numeric
+    for x in myval[:-1]:
+        if not len(x):
+            if not silent:
+                error("package version has two points in a row")
+            __ververify_cache__[myorigval] = 0
+            return 0
+        try:
+            foo = int(x)
+        except:
+            if not silent:
+                error("package version contains non-numeric '"+x+"'")
+            __ververify_cache__[myorigval] = 0
+            return 0
+    if not len(myval[-1]):
+            if not silent:
+                error("package version has trailing dot")
+            __ververify_cache__[myorigval] = 0
+            return 0
+    try:
+        foo = int(myval[-1])
+        __ververify_cache__[myorigval] = 1
+        return 1
+    except:
+        pass
+
+    # ok, our last component is not a plain number or blank, let's continue
+    if myval[-1][-1] in lowercase:
+        try:
+            foo = int(myval[-1][:-1])
+            return 1
+            __ververify_cache__[myorigval] = 1
+            # 1a, 2.0b, etc.
+        except:
+            pass
+    # ok, maybe we have a 1_alpha or 1_beta2; let's see
+    ep=string.split(myval[-1],"_")
+    if len(ep)!= 2:
+        if not silent:
+            error("package version has more than one letter at then end")
+        __ververify_cache__[myorigval] = 0
+        return 0
+    try:
+        foo = string.atoi(ep[0])
+    except:
+        # this needs to be numeric, i.e. the "1" in "1_alpha"
+        if not silent:
+            error("package version must have numeric part before the '_'")
+        __ververify_cache__[myorigval] = 0
+        return 0
+
+    for mye in _package_ends_:
+        if ep[1][0:len(mye)] == mye:
+            if len(mye) == len(ep[1]):
+                # no trailing numeric is ok
+                __ververify_cache__[myorigval] = 1
+                return 1
+            else:
+                try:
+                    foo = string.atoi(ep[1][len(mye):])
+                    __ververify_cache__[myorigval] = 1
+                    return 1
+                except:
+                    # if no _package_weights_ work, *then* we return 0
+                    pass
+    if not silent:
+        error("package version extension after '_' is invalid")
+    __ververify_cache__[myorigval] = 0
+    return 0
+
+
+def isjustname(mypkg):
+    myparts = string.split(mypkg,'-')
+    for x in myparts:
+        if ververify(x):
+            return 0
+    return 1
+
+
+_isspecific_cache_={}
+
+def isspecific(mypkg):
+    "now supports packages with no category"
+    try:
+        return __isspecific_cache__[mypkg]
+    except:
+        pass
+
+    mysplit = string.split(mypkg,"/")
+    if not isjustname(mysplit[-1]):
+            __isspecific_cache__[mypkg] = 1
+            return 1
+    __isspecific_cache__[mypkg] = 0
+    return 0
+
+
+#######################################################################
+
+__pkgsplit_cache__={}
+
+def pkgsplit(mypkg, silent=1):
+
+    """This function can be used as a package verification function. If
+    it is a valid name, pkgsplit will return a list containing:
+    [pkgname, pkgversion(norev), pkgrev ].
+
+    >>> pkgsplit('')
+    >>> pkgsplit('x')
+    >>> pkgsplit('x-')
+    >>> pkgsplit('-1')
+    >>> pkgsplit('glibc-1.2-8.9-r7')
+    >>> pkgsplit('glibc-2.2.5-r7')
+    ['glibc', '2.2.5', 'r7']
+    >>> pkgsplit('foo-1.2-1')
+    >>> pkgsplit('Mesa-3.0')
+    ['Mesa', '3.0', 'r0']
+    """
+
+    try:
+        return __pkgsplit_cache__[mypkg]
+    except KeyError:
+        pass
+
+    myparts = string.split(mypkg,'-')
+    if len(myparts) < 2:
+        if not silent:
+            error("package name without name or version part")
+        __pkgsplit_cache__[mypkg] = None
+        return None
+    for x in myparts:
+        if len(x) == 0:
+            if not silent:
+                error("package name with empty name or version part")
+            __pkgsplit_cache__[mypkg] = None
+            return None
+    # verify rev
+    revok = 0
+    myrev = myparts[-1]
+    ververify(myrev, silent)
+    if len(myrev) and myrev[0] == "r":
+        try:
+            string.atoi(myrev[1:])
+            revok = 1
+        except:
+            pass
+    if revok:
+        if ververify(myparts[-2]):
+            if len(myparts) == 2:
+                __pkgsplit_cache__[mypkg] = None
+                return None
+            else:
+                for x in myparts[:-2]:
+                    if ververify(x):
+                        __pkgsplit_cache__[mypkg]=None
+                        return None
+                        # names can't have versiony looking parts
+                myval=[string.join(myparts[:-2],"-"),myparts[-2],myparts[-1]]
+                __pkgsplit_cache__[mypkg]=myval
+                return myval
+        else:
+            __pkgsplit_cache__[mypkg] = None
+            return None
+
+    elif ververify(myparts[-1],silent):
+        if len(myparts)==1:
+            if not silent:
+                print "!!! Name error in",mypkg+": missing name part."
+            __pkgsplit_cache__[mypkg]=None
+            return None
+        else:
+            for x in myparts[:-1]:
+                if ververify(x):
+                    if not silent: error("package name has multiple version parts")
+                    __pkgsplit_cache__[mypkg] = None
+                    return None
+            myval = [string.join(myparts[:-1],"-"), myparts[-1],"r0"]
+            __pkgsplit_cache__[mypkg] = myval
+            return myval
+    else:
+        __pkgsplit_cache__[mypkg] = None
+        return None
+
+
+#######################################################################
+
+__catpkgsplit_cache__ = {}
+
+def catpkgsplit(mydata,silent=1):
+    """returns [cat, pkgname, version, rev ]
+
+    >>> catpkgsplit('sys-libs/glibc-1.2-r7')
+    ['sys-libs', 'glibc', '1.2', 'r7']
+    >>> catpkgsplit('glibc-1.2-r7')
+    [None, 'glibc', '1.2', 'r7']
+    """
+
+    try:
+        return __catpkgsplit_cache__[mydata]
+    except KeyError:
+        pass
+
+    cat = os.path.basename(os.path.dirname(mydata))
+    mydata = os.path.join(cat, os.path.basename(mydata))
+    if mydata[-3:] == '.bb':
+        mydata = mydata[:-3]
+
+    mysplit = mydata.split("/")
+    p_split = None
+    splitlen = len(mysplit)
+    if splitlen == 1:
+        retval = [None]
+        p_split = pkgsplit(mydata,silent)
+    else:
+        retval = [mysplit[splitlen - 2]]
+        p_split = pkgsplit(mysplit[splitlen - 1],silent)
+    if not p_split:
+        __catpkgsplit_cache__[mydata] = None
+        return None
+    retval.extend(p_split)
+    __catpkgsplit_cache__[mydata] = retval
+    return retval
+
+
+#######################################################################
+
+__vercmp_cache__ = {}
+
+def vercmp(val1,val2):
+    """This takes two version strings and returns an integer to tell you whether
+    the versions are the same, val1>val2 or val2>val1.
+
+    >>> vercmp('1', '2')
+    -1.0
+    >>> vercmp('2', '1')
+    1.0
+    >>> vercmp('1', '1.0')
+    0
+    >>> vercmp('1', '1.1')
+    -1.0
+    >>> vercmp('1.1', '1_p2')
+    1.0
+    """
+
+    # quick short-circuit
+    if val1 == val2:
+        return 0
+    valkey = val1+" "+val2
+
+    # cache lookup
+    try:
+        return __vercmp_cache__[valkey]
+        try:
+            return - __vercmp_cache__[val2+" "+val1]
+        except KeyError:
+            pass
+    except KeyError:
+        pass
+
+    # consider 1_p2 vc 1.1
+    # after expansion will become (1_p2,0) vc (1,1)
+    # then 1_p2 is compared with 1 before 0 is compared with 1
+    # to solve the bug we need to convert it to (1,0_p2)
+    # by splitting _prepart part and adding it back _after_expansion
+
+    val1_prepart = val2_prepart = ''
+    if val1.count('_'):
+        val1, val1_prepart = val1.split('_', 1)
+    if val2.count('_'):
+        val2, val2_prepart = val2.split('_', 1)
+
+    # replace '-' by '.'
+    # FIXME: Is it needed? can val1/2 contain '-'?
+
+    val1 = string.split(val1,'-')
+    if len(val1) == 2:
+        val1[0] = val1[0] +"."+ val1[1]
+    val2 = string.split(val2,'-')
+    if len(val2) == 2:
+        val2[0] = val2[0] +"."+ val2[1]
+
+    val1 = string.split(val1[0],'.')
+    val2 = string.split(val2[0],'.')
+
+    # add back decimal point so that .03 does not become "3" !
+    for x in range(1,len(val1)):
+        if val1[x][0] == '0' :
+            val1[x] = '.' + val1[x]
+    for x in range(1,len(val2)):
+        if val2[x][0] == '0' :
+            val2[x] = '.' + val2[x]
+
+    # extend varion numbers
+    if len(val2) < len(val1):
+        val2.extend(["0"]*(len(val1)-len(val2)))
+    elif len(val1) < len(val2):
+        val1.extend(["0"]*(len(val2)-len(val1)))
+
+    # add back _prepart tails
+    if val1_prepart:
+        val1[-1] += '_' + val1_prepart
+    if val2_prepart:
+        val2[-1] += '_' + val2_prepart
+    # The above code will extend version numbers out so they
+    # have the same number of digits.
+    for x in range(0,len(val1)):
+        cmp1 = relparse(val1[x])
+        cmp2 = relparse(val2[x])
+        for y in range(0,3):
+            myret = cmp1[y] - cmp2[y]
+            if myret != 0:
+                __vercmp_cache__[valkey] = myret
+                return myret
+    __vercmp_cache__[valkey] = 0
+    return 0
+
+
+#######################################################################
+
+def pkgcmp(pkg1,pkg2):
+    """ Compares two packages, which should have been split via
+    pkgsplit(). if the return value val is less than zero, then pkg2 is
+    newer than pkg1, zero if equal and positive if older.
+
+    >>> pkgcmp(['glibc', '2.2.5', 'r7'], ['glibc', '2.2.5', 'r7'])
+    0
+    >>> pkgcmp(['glibc', '2.2.5', 'r4'], ['glibc', '2.2.5', 'r7'])
+    -1
+    >>> pkgcmp(['glibc', '2.2.5', 'r7'], ['glibc', '2.2.5', 'r2'])
+    1
+    """
+
+    mycmp = vercmp(pkg1[1],pkg2[1])
+    if mycmp > 0:
+        return 1
+    if mycmp < 0:
+        return -1
+    r1=string.atoi(pkg1[2][1:])
+    r2=string.atoi(pkg2[2][1:])
+    if r1 > r2:
+        return 1
+    if r2 > r1:
+        return -1
+    return 0
+
+
+#######################################################################
+
+def dep_parenreduce(mysplit, mypos=0):
+    """Accepts a list of strings, and converts '(' and ')' surrounded items to sub-lists:
+
+    >>> dep_parenreduce([''])
+    ['']
+    >>> dep_parenreduce(['1', '2', '3'])
+    ['1', '2', '3']
+    >>> dep_parenreduce(['1', '(', '2', '3', ')', '4'])
+    ['1', ['2', '3'], '4']
+    """
+
+    while mypos < len(mysplit):
+        if mysplit[mypos] == "(":
+            firstpos = mypos
+            mypos = mypos + 1
+            while mypos < len(mysplit):
+                if mysplit[mypos] == ")":
+                    mysplit[firstpos:mypos+1] = [mysplit[firstpos+1:mypos]]
+                    mypos = firstpos
+                    break
+                elif mysplit[mypos] == "(":
+                    # recurse
+                    mysplit = dep_parenreduce(mysplit,mypos)
+                mypos = mypos + 1
+        mypos = mypos + 1
+    return mysplit
+
+
+def dep_opconvert(mysplit, myuse):
+    "Does dependency operator conversion"
+
+    mypos   = 0
+    newsplit = []
+    while mypos < len(mysplit):
+        if type(mysplit[mypos]) == types.ListType:
+            newsplit.append(dep_opconvert(mysplit[mypos],myuse))
+            mypos += 1
+        elif mysplit[mypos] == ")":
+            # mismatched paren, error
+            return None
+        elif mysplit[mypos]=="||":
+            if ((mypos+1)>=len(mysplit)) or (type(mysplit[mypos+1])!=types.ListType):
+                # || must be followed by paren'd list
+                return None
+            try:
+                mynew = dep_opconvert(mysplit[mypos+1],myuse)
+            except Exception, e:
+                error("unable to satisfy OR dependancy: " + string.join(mysplit," || "))
+                raise e
+            mynew[0:0] = ["||"]
+            newsplit.append(mynew)
+            mypos += 2
+        elif mysplit[mypos][-1] == "?":
+            # use clause, i.e "gnome? ( foo bar )"
+            # this is a quick and dirty hack so that repoman can enable all USE vars:
+            if (len(myuse) == 1) and (myuse[0] == "*"):
+                # enable it even if it's ! (for repoman) but kill it if it's
+                # an arch variable that isn't for this arch. XXX Sparc64?
+                if (mysplit[mypos][:-1] not in settings.usemask) or \
+                        (mysplit[mypos][:-1]==settings["ARCH"]):
+                    enabled=1
+                else:
+                    enabled=0
+            else:
+                if mysplit[mypos][0] == "!":
+                    myusevar = mysplit[mypos][1:-1]
+                    enabled = not myusevar in myuse
+                    #if myusevar in myuse:
+                    #    enabled = 0
+                    #else:
+                    #    enabled = 1
+                else:
+                    myusevar=mysplit[mypos][:-1]
+                    enabled = myusevar in myuse
+                    #if myusevar in myuse:
+                    #    enabled=1
+                    #else:
+                    #    enabled=0
+            if (mypos +2 < len(mysplit)) and (mysplit[mypos+2] == ":"):
+                # colon mode
+                if enabled:
+                    # choose the first option
+                    if type(mysplit[mypos+1]) == types.ListType:
+                        newsplit.append(dep_opconvert(mysplit[mypos+1],myuse))
+                    else:
+                        newsplit.append(mysplit[mypos+1])
+                else:
+                    # choose the alternate option
+                    if type(mysplit[mypos+1]) == types.ListType:
+                        newsplit.append(dep_opconvert(mysplit[mypos+3],myuse))
+                    else:
+                        newsplit.append(mysplit[mypos+3])
+                mypos += 4
+            else:
+                # normal use mode
+                if enabled:
+                    if type(mysplit[mypos+1]) == types.ListType:
+                        newsplit.append(dep_opconvert(mysplit[mypos+1],myuse))
+                    else:
+                        newsplit.append(mysplit[mypos+1])
+                # otherwise, continue
+                mypos += 2
+        else:
+            # normal item
+            newsplit.append(mysplit[mypos])
+            mypos += 1
+    return newsplit
+
+class digraph:
+    """beautiful directed graph object"""
+
+    def __init__(self):
+        self.dict={}
+        #okeys = keys, in order they were added (to optimize firstzero() ordering)
+        self.okeys=[]
+        self.__callback_cache=[]
+
+    def __str__(self):
+        str = ""
+        for key in self.okeys:
+            str += "%s:\t%s\n" % (key, self.dict[key][1])
+        return str
+
+    def addnode(self,mykey,myparent):
+        if not mykey in self.dict:
+            self.okeys.append(mykey)
+            if myparent==None:
+                self.dict[mykey]=[0,[]]
+            else:
+                self.dict[mykey]=[0,[myparent]]
+                self.dict[myparent][0]=self.dict[myparent][0]+1
+            return
+        if myparent and (not myparent in self.dict[mykey][1]):
+            self.dict[mykey][1].append(myparent)
+            self.dict[myparent][0]=self.dict[myparent][0]+1
+
+    def delnode(self,mykey, ref = 1):
+        """Delete a node
+
+        If ref is 1, remove references to this node from other nodes.
+        If ref is 2, remove nodes that reference this node."""
+        if not mykey in self.dict:
+            return
+        for x in self.dict[mykey][1]:
+            self.dict[x][0]=self.dict[x][0]-1
+        del self.dict[mykey]
+        while 1:
+            try:
+                self.okeys.remove(mykey)
+            except ValueError:
+                break
+        if ref:
+            __kill = []
+            for k in self.okeys:
+                if mykey in self.dict[k][1]:
+                    if ref == 1 or ref == 2:
+                        self.dict[k][1].remove(mykey)
+                    if ref == 2:
+                        __kill.append(k)
+            for l in __kill:
+                self.delnode(l, ref)
+
+    def allnodes(self):
+        "returns all nodes in the dictionary"
+        return self.dict.keys()
+
+    def firstzero(self):
+        "returns first node with zero references, or NULL if no such node exists"
+        for x in self.okeys:
+            if self.dict[x][0]==0:
+                return x
+        return None
+
+    def firstnonzero(self):
+        "returns first node with nonzero references, or NULL if no such node exists"
+        for x in self.okeys:
+            if self.dict[x][0]!=0:
+                return x
+        return None
+
+
+    def allzeros(self):
+        "returns all nodes with zero references, or NULL if no such node exists"
+        zerolist = []
+        for x in self.dict.keys():
+            if self.dict[x][0]==0:
+                zerolist.append(x)
+        return zerolist
+
+    def hasallzeros(self):
+        "returns 0/1, Are all nodes zeros? 1 : 0"
+        zerolist = []
+        for x in self.dict.keys():
+            if self.dict[x][0]!=0:
+                return 0
+        return 1
+
+    def empty(self):
+        if len(self.dict)==0:
+            return 1
+        return 0
+
+    def hasnode(self,mynode):
+        return mynode in self.dict
+
+    def getparents(self, item):
+        if not self.hasnode(item):
+            return []
+        return self.dict[item][1]
+
+    def getchildren(self, item):
+        if not self.hasnode(item):
+            return []
+        children = [i for i in self.okeys if item in self.getparents(i)]
+        return children
+
+    def walkdown(self, item, callback, debug = None, usecache = False):
+        if not self.hasnode(item):
+            return 0
+
+        if usecache:
+            if self.__callback_cache.count(item):
+                if debug:
+                    print "hit cache for item: %s" % item
+                return 1
+
+        parents = self.getparents(item)
+        children = self.getchildren(item)
+        for p in parents:
+            if p in children:
+#                print "%s is both parent and child of %s" % (p, item)
+                if usecache:
+                    self.__callback_cache.append(p)
+                ret = callback(self, p)
+                if ret == 0:
+                    return 0
+                continue
+            if item == p:
+                print "eek, i'm my own parent!"
+                return 0
+            if debug:
+                print "item: %s, p: %s" % (item, p)
+            ret = self.walkdown(p, callback, debug, usecache)
+            if ret == 0:
+                return 0
+        if usecache:
+            self.__callback_cache.append(item)
+        return callback(self, item)
+
+    def walkup(self, item, callback):
+        if not self.hasnode(item):
+            return 0
+
+        parents = self.getparents(item)
+        children = self.getchildren(item)
+        for c in children:
+            if c in parents:
+                ret = callback(self, item)
+                if ret == 0:
+                    return 0
+                continue
+            if item == c:
+                print "eek, i'm my own child!"
+                return 0
+            ret = self.walkup(c, callback)
+            if ret == 0:
+                return 0
+        return callback(self, item)
+
+    def copy(self):
+        mygraph=digraph()
+        for x in self.dict.keys():
+            mygraph.dict[x]=self.dict[x][:]
+            mygraph.okeys=self.okeys[:]
+        return mygraph
+
+#######################################################################
+#######################################################################
+#
+# SECTION: Config
+#
+# PURPOSE: Reading and handling of system/target-specific/local configuration
+#       reading of package configuration
+#
+#######################################################################
+#######################################################################
+
+def reader(cfgfile, feeder):
+    """Generic configuration file reader that opens a file, reads the lines,
+    handles continuation lines, comments, empty lines and feed all read lines
+    into the function feeder(lineno, line).
+    """
+
+    f = open(cfgfile,'r')
+    lineno = 0
+    while 1:
+        lineno = lineno + 1
+        s = f.readline()
+        if not s: break
+        w = s.strip()
+        if not w: continue        # skip empty lines
+        s = s.rstrip()
+        if s[0] == '#': continue    # skip comments
+        while s[-1] == '\\':
+            s2 = f.readline()[:-1].strip()
+            s = s[:-1] + s2
+        feeder(lineno, s)
+
+if __name__ == "__main__":
+    import doctest, bb
+    doctest.testmod(bb)