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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 import re import os import apt import apt_pkg import logging import gzip import shutil import subprocess import sys import tempfile from gettext import gettext as _ class AptCdromError(Exception): """ base exception for apt cdrom errors """ pass class AptCdrom(object): """ represents a apt cdrom object """ def __init__(self, view, path): self.view = view self.cdrompath = path # the directories we found on disk with signatures, packages and i18n self.packages = set() self.signatures = set() self.i18n = set() apt_pkg.init_config() def restore_backup(self, backup_ext): """ restore the backup copy of the cdroms.list file (*not* sources.list)! """ cdromstate = os.path.join(apt_pkg.config.find_dir("Dir::State"), apt_pkg.config.find("Dir::State::cdroms")) if os.path.exists(cdromstate + backup_ext): shutil.copy(cdromstate + backup_ext, cdromstate) # mvo: we don't have to care about restoring the sources.list here # because aptsources will do this for us anyway def comment_out_cdrom_entry(self): """ comment out the cdrom entry """ diskname = self._readDiskName() pentry = self._generateSourcesListLine(diskname, self.packages) sourceslist = apt_pkg.config.find_file("Dir::Etc::sourcelist") with open(sourceslist) as f: content = f.read() content = content.replace(pentry, "# %s" % pentry) with open(sourceslist, "w") as f: f.write(content) def _scanCD(self): """ scan the CD for interessting files and return them as: (packagesfiles, signaturefiles, i18nfiles) """ packages = set() signatures = set() i18n = set() for root, dirs, files in os.walk(self.cdrompath, topdown=True): if (root.endswith("debian-installer") or root.endswith("dist-upgrader")): del dirs[:] continue elif ".aptignr" in files: continue elif "Packages" in files: packages.add(os.path.join(root, "Packages")) elif "Packages.gz" in files: packages.add(os.path.join(root, "Packages.gz")) elif "Sources" in files or "Sources.gz" in files: logging.error( "Sources entry found in %s but not supported" % root) elif "Release.gpg" in files: signatures.add(os.path.join(root, "Release.gpg")) elif "i18n" in dirs: for f in os.listdir(os.path.join(root, "i18n")): i18n.add(os.path.join(root, "i18n", f)) # there is nothing under pool but deb packages (no # indexfiles, so we skip that here elif os.path.split(root)[1] == "pool": del dirs[:] return (packages, signatures, i18n) def _writeDatabase(self): """ update apts cdrom.list """ dbfile = apt_pkg.config.find_file("Dir::State::cdroms") cdrom = apt_pkg.Cdrom() id = cdrom.ident(apt.progress.base.CdromProgress()) label = self._readDiskName() with open(dbfile, "a") as out: out.write('CD::%s "%s";\n' % (id, label)) out.write('CD::%s::Label "%s";\n' % (id, label)) def _dropArch(self, packages): """ drop architectures that are not ours """ # create a copy packages = set(packages) # now go over the packagesdirs and drop stuff that is not # our binary-$arch arch = apt_pkg.config.find("APT::Architecture") for d in set(packages): if "/binary-" in d and arch not in d: packages.remove(d) return packages def _readDiskName(self): # default to cdrompath if there is no name diskname = self.cdrompath info = os.path.join(self.cdrompath, ".disk", "info") if os.path.exists(info): with open(info) as f: diskname = f.read() for special in ('"', ']', '[', '_'): diskname = diskname.replace(special, '_') return diskname def _generateSourcesListLine(self, diskname, packages): # see apts indexcopy.cc:364 for details path = "" dist = "" comps = [] for d in packages: # match(1) is the path, match(2) the dist # and match(3) the components m = re.match("(.*)/dists/([^/]*)/(.*)/binary-*", d) if not m: raise AptCdromError( _("Could not calculate sources.list entry")) path = m.group(1) dist = m.group(2) comps.append(m.group(3)) if not path or not comps: return None comps.sort() pentry = "deb cdrom:[%s]/ %s %s" % (diskname, dist, " ".join(comps)) return pentry def _copyTranslations(self, translations, targetdir=None): if not targetdir: targetdir = apt_pkg.config.find_dir("Dir::State::lists") diskname = self._readDiskName() for f in translations: fname = apt_pkg.uri_to_filename( "cdrom:[%s]/%s" % (diskname, f[f.find("dists"):])) outf = os.path.join(targetdir, os.path.splitext(fname)[0]) if f.endswith(".gz"): with gzip.open(f) as g, open(outf, "wb") as out: # uncompress in 64k chunks while True: s = g.read(64000) out.write(s) if s == b"": break else: shutil.copy(f, outf) return True def _copyPackages(self, packages, targetdir=None): if not targetdir: targetdir = apt_pkg.config.find_dir("Dir::State::lists") # CopyPackages() diskname = self._readDiskName() for f in packages: fname = apt_pkg.uri_to_filename( "cdrom:[%s]/%s" % (diskname, f[f.find("dists"):])) outf = os.path.join(targetdir, os.path.splitext(fname)[0]) if f.endswith(".gz"): with gzip.open(f) as g, open(outf, "wb") as out: # uncompress in 64k chunks while True: s = g.read(64000) out.write(s) if s == b"": break else: shutil.copy(f, outf) return True def _verifyRelease(self, signatures): " verify the signatues and hashes " for sig in signatures: basepath = os.path.split(sig)[0] # do gpg checking releasef = os.path.splitext(sig)[0] verify_env = os.environ.copy() cmd = ["apt-key", "--quiet", "verify", sig, releasef] with tempfile.NamedTemporaryFile() as fp: fp.write(apt_pkg.config.dump()) verify_env["APT_CONFIG"] = fp.name ret = subprocess.call(cmd, env=verify_env) if not (ret == 0): return False # now do the hash sum checks with open(releasef) as f: t = apt_pkg.TagFile(f) t.step() sha256_section = t.section["SHA256"] for entry in sha256_section.split("\n"): (hash, size, name) = entry.split() f = os.path.join(basepath, name) if not os.path.exists(f): logging.info("ignoring missing '%s'" % f) continue with open(f) as fp: sum = apt_pkg.sha256sum(fp) if not (sum == hash): logging.error( "hash sum mismatch expected %s but got %s" % ( hash, sum)) return False return True def _copyRelease(self, signatures, targetdir=None): " copy the release file " if not targetdir: targetdir = apt_pkg.config.find_dir("Dir::State::lists") diskname = self._readDiskName() for sig in signatures: releasef = os.path.splitext(sig)[0] # copy both Release and Release.gpg for f in (sig, releasef): fname = apt_pkg.uri_to_filename( "cdrom:[%s]/%s" % (diskname, f[f.find("dists"):])) shutil.copy(f, os.path.join(targetdir, fname)) return True def _doAdd(self): " reimplement pkgCdrom::Add() in python " # os.walk() will not follow symlinks so we don't need # pkgCdrom::Score() and not dropRepeats() that deal with # killing the links (self.packages, self.signatures, self.i18n) = self._scanCD() self.packages = self._dropArch(self.packages) if len(self.packages) == 0: logging.error("no useable indexes found on CD, wrong ARCH?") raise AptCdromError( _("Unable to locate any package files, " "perhaps this is not a Ubuntu Disc or the wrong " "architecture?")) # CopyAndVerify if self._verifyRelease(self.signatures): self._copyRelease(self.signatures) # copy the packages and translations self._copyPackages(self.packages) self._copyTranslations(self.i18n) # add CD to cdroms.list "database" and update sources.list diskname = self._readDiskName() if not diskname: logging.error("no .disk/ directory found") return False debline = self._generateSourcesListLine(diskname, self.packages) # prepend to the sources.list sourceslist = apt_pkg.config.find_file("Dir::Etc::sourcelist") with open(sourceslist) as f: content = f.read() with open(sourceslist, "w") as f: f.write( "# added by the release upgrader\n%s\n%s" % (debline, content)) self._writeDatabase() return True def add(self, backup_ext=None): " add a cdrom to apt's database " logging.debug("AptCdrom.add() called with '%s'", self.cdrompath) # do backup (if needed) of the cdroms.list file if backup_ext: cdromstate = os.path.join( apt_pkg.config.find_dir("Dir::State"), apt_pkg.config.find("Dir::State::cdroms")) if os.path.exists(cdromstate): shutil.copy(cdromstate, cdromstate + backup_ext) # do the actual work apt_pkg.config.set("Acquire::cdrom::mount", self.cdrompath) apt_pkg.config.set("APT::CDROM::NoMount", "true") # FIXME: add cdrom progress here for the view #progress = self.view.getCdromProgress() try: res = self._doAdd() except (SystemError, AptCdromError) as e: logging.error("can't add cdrom: %s" % e) self.view.error(_("Failed to add the CD"), _("There was a error adding the CD, the " "upgrade will abort. Please report this as " "a bug if this is a valid Ubuntu CD.\n\n" "The error message was:\n'%s'") % e) return False logging.debug("AptCdrom.add() returned: %s" % res) return res def __bool__(self): """ helper to use this as 'if cdrom:' """ return self.cdrompath is not None if sys.version < '3': __nonzero__ = __bool__