Edit File: arch.py
#!/usr/bin/python # import os _ppc64_native_is_best = True # dict mapping arch -> ( multicompat, best personality, biarch personality ) multilibArches = { "x86_64": ( "athlon", "x86_64", "athlon" ), "sparc64v": ( "sparcv9v", "sparcv9v", "sparc64v" ), "sparc64": ( "sparcv9", "sparcv9", "sparc64" ), "ppc64": ( "ppc", "ppc", "ppc64" ), "s390x": ( "s390", "s390x", "s390" ), } if _ppc64_native_is_best: multilibArches["ppc64"] = ( "ppc", "ppc64", "ppc64" ) arches = { # ia32 "athlon": "i686", "i686": "i586", "geode": "i686", "i586": "i486", "i486": "i386", "i386": "noarch", # amd64 "x86_64": "athlon", "amd64": "x86_64", "ia32e": "x86_64", # ppc "ppc64pseries": "ppc64", "ppc64iseries": "ppc64", "ppc64": "ppc", "ppc": "noarch", # s390{,x} "s390x": "s390", "s390": "noarch", # sparc "sparc64v": "sparcv9v", "sparc64": "sparcv9", "sparcv9v": "sparcv9", "sparcv9": "sparcv8", "sparcv8": "sparc", "sparc": "noarch", # alpha "alphaev7": "alphaev68", "alphaev68": "alphaev67", "alphaev67": "alphaev6", "alphaev6": "alphapca56", "alphapca56": "alphaev56", "alphaev56": "alphaev5", "alphaev5": "alphaev45", "alphaev45": "alphaev4", "alphaev4": "alpha", "alpha": "noarch", # arm "armv7l": "armv6l", "armv6l": "armv5tejl", "armv5tejl": "armv5tel", "armv5tel": "noarch", # super-h "sh4a": "sh4", "sh4": "noarch", "sh3": "noarch", #itanium "ia64": "noarch", } def legitMultiArchesInSameLib(arch=None): # this is completely crackrock - if anyone has a better way I # am all ears arch = getBestArch(arch) if isMultiLibArch(arch): arch = getBaseArch(myarch=arch) results = [arch] if arch == 'x86_64' or arch.startswith('sparcv9'): for (k, v) in arches.items(): if v == arch: results.append(k) return results def canCoinstall(arch1, arch2): """Take two arches and return True if it is possible that they can be installed together with the same nevr. Ex: arch1=i386 and arch2=i686 then it will return False. arch1=i386 and arch2=x86_64 will return True. It does not determine whether or not the arches make any sense. Just whether they could possibly install w/o conflict""" # if both are a multlibarch then we can't coinstall (x86_64, ia32e) # if both are not multilibarches then we can't coinstall (i386, i686) if 'noarch' in [arch1, arch2]: # noarch can never coinstall return False if isMultiLibArch(arch=arch1) == isMultiLibArch(arch=arch2): return False # this section keeps arch1=x86_64 arch2=ppc from returning True if arch1 in getArchList(arch2) or arch2 in getArchList(arch1): return True return False # this computes the difference between myarch and targetarch def archDifference(myarch, targetarch): if myarch == targetarch: return 1 if myarch in arches: ret = archDifference(arches[myarch], targetarch) if ret != 0: return ret + 1 return 0 return 0 def score(arch): return archDifference(canonArch, arch) def isMultiLibArch(arch=None): """returns true if arch is a multilib arch, false if not""" if arch is None: arch = canonArch if arch not in arches: # or we could check if it is noarch return 0 if arch in multilibArches: return 1 if arches[arch] in multilibArches: return 1 return 0 def getBestArchFromList(archlist, myarch=None): """ return the best arch from the list for myarch if - myarch is not given, then return the best arch from the list for the canonArch. """ if len(archlist) == 0: return None if myarch is None: myarch = canonArch mybestarch = getBestArch(myarch) bestarch = getBestArch(myarch) if bestarch != myarch: bestarchchoice = getBestArchFromList(archlist, bestarch) if bestarchchoice != None and bestarchchoice != "noarch": return bestarchchoice thisarch = archlist[0] for arch in archlist[1:]: val1 = archDifference(myarch, thisarch) val2 = archDifference(myarch, arch) if val1 == 0 and val2 == 0: continue if val1 < val2: if val1 == 0: thisarch = arch if val2 < val1: if val2 != 0: thisarch = arch if val1 == val2: pass # thisarch should now be our bestarch # one final check to make sure we're not returning a bad arch val = archDifference(myarch, thisarch) if val == 0: return None return thisarch def getArchList(thisarch=None): # this returns a list of archs that are compatible with arch given if not thisarch: thisarch = canonArch archlist = [thisarch] while thisarch in arches: thisarch = arches[thisarch] archlist.append(thisarch) # hack hack hack # sparc64v is also sparc64 compat if archlist[0] == "sparc64v": archlist.insert(1,"sparc64") # if we're a weirdo arch - add noarch on there. if len(archlist) == 1 and archlist[0] == thisarch: archlist.append('noarch') return archlist def _try_read_cpuinfo(): """ Try to read /proc/cpuinfo ... if we can't ignore errors (ie. proc not mounted). """ try: lines = open("/proc/cpuinfo", "r").readlines() return lines except: return [] def getCanonX86Arch(arch): # if arch == "i586": for line in _try_read_cpuinfo(): if line.startswith("model name") and line.find("Geode(TM)") != -1: return "geode" return arch # only athlon vs i686 isn't handled with uname currently if arch != "i686": return arch # if we're i686 and AuthenticAMD, then we should be an athlon for line in _try_read_cpuinfo(): if line.startswith("vendor") and line.find("AuthenticAMD") != -1: return "athlon" # i686 doesn't guarantee cmov, but we depend on it elif line.startswith("flags") and line.find("cmov") == -1: return "i586" return arch def getCanonPPCArch(arch): # FIXME: should I do better handling for mac, etc? if arch != "ppc64": return arch machine = None for line in _try_read_cpuinfo(): if line.find("machine") != -1: machine = line.split(':')[1] break if machine is None: return arch if machine.find("CHRP IBM") != -1: return "ppc64pseries" if machine.find("iSeries") != -1: return "ppc64iseries" return arch def getCanonSPARCArch(arch): # Deal with sun4v, sun4u, sun4m cases SPARCtype = None for line in _try_read_cpuinfo(): if line.startswith("type"): SPARCtype = line.split(':')[1] break if SPARCtype is None: return arch if SPARCtype.find("sun4v") != -1: if arch.startswith("sparc64"): return "sparc64v" else: return "sparcv9v" if SPARCtype.find("sun4u") != -1: if arch.startswith("sparc64"): return "sparc64" else: return "sparcv9" if SPARCtype.find("sun4m") != -1: return "sparcv8" return arch def getCanonX86_64Arch(arch): if arch != "x86_64": return arch vendor = None for line in _try_read_cpuinfo(): if line.startswith("vendor_id"): vendor = line.split(':')[1] break if vendor is None: return arch if vendor.find("Authentic AMD") != -1 or vendor.find("AuthenticAMD") != -1: return "amd64" if vendor.find("GenuineIntel") != -1: return "ia32e" return arch def getCanonArch(skipRpmPlatform = 0): if not skipRpmPlatform and os.access("/etc/rpm/platform", os.R_OK): try: f = open("/etc/rpm/platform", "r") line = f.readline() f.close() (arch, vendor, opersys) = line.split("-", 2) return arch except: pass arch = os.uname()[4] if (len(arch) == 4 and arch[0] == "i" and arch[2:4] == "86"): return getCanonX86Arch(arch) if arch.startswith("ppc"): return getCanonPPCArch(arch) if arch.startswith("sparc"): return getCanonSPARCArch(arch) if arch == "x86_64": return getCanonX86_64Arch(arch) return arch canonArch = getCanonArch() # this gets you the "compat" arch of a biarch pair def getMultiArchInfo(arch = canonArch): if arch in multilibArches: return multilibArches[arch] if arch in arches and arches[arch] != "noarch": return getMultiArchInfo(arch = arches[arch]) return None # get the best usual userspace arch for the arch we're on. this is # our arch unless we're on an arch that uses the secondary as its # userspace (eg ppc64, sparc64) def getBestArch(myarch=None): if myarch: arch = myarch else: arch = canonArch if arch.startswith("sparc64"): arch = multilibArches[arch][1] if arch.startswith("ppc64") and not _ppc64_native_is_best: arch = 'ppc' return arch def getBaseArch(myarch=None): """returns 'base' arch for myarch, if specified, or canonArch if not. base arch is the arch before noarch in the arches dict if myarch is not a key in the multilibArches.""" if not myarch: myarch = canonArch if myarch not in arches: # this is dumb, but <shrug> return myarch if myarch.startswith("sparc64"): return "sparc" elif myarch.startswith("ppc64") and not _ppc64_native_is_best: return "ppc" if isMultiLibArch(arch=myarch): if myarch in multilibArches: return myarch else: return arches[myarch] if myarch in arches: basearch = myarch value = arches[basearch] while value != 'noarch': basearch = value value = arches[basearch] return basearch class ArchStorage(object): """class for keeping track of what arch we have set and doing various permutations based on it""" def __init__(self): self.canonarch = None self.basearch = None self.bestarch = None self.compatarches = [] self.archlist = [] self.multilib = False self.setup_arch() def setup_arch(self, arch=None, archlist_includes_compat_arch=True): if arch: self.canonarch = arch else: self.canonarch = getCanonArch() self.basearch = getBaseArch(myarch=self.canonarch) self.archlist = getArchList(thisarch=self.canonarch) if not archlist_includes_compat_arch: # - do we bother including i686 and below on x86_64 limit_archlist = [] for a in self.archlist: if isMultiLibArch(a) or a == 'noarch': limit_archlist.append(a) self.archlist = limit_archlist self.bestarch = getBestArch(myarch=self.canonarch) self.compatarches = getMultiArchInfo(arch=self.canonarch) self.multilib = isMultiLibArch(arch=self.canonarch) self.legit_multi_arches = legitMultiArchesInSameLib(arch = self.canonarch) def get_best_arch_from_list(self, archlist, fromarch=None): if not fromarch: fromarch = self.canonarch return getBestArchFromList(archlist, myarch=fromarch) def score(self, arch): return archDifference(self.canonarch, arch) def get_arch_list(self, arch): if not arch: return self.archlist return getArchList(thisarch=arch)
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