def start(self, is_upgrade):
        """Start view, build and install SBo packages
        """
        tagc = ""
        self.is_upgrade = is_upgrade
        self.case_insensitive()
        for _sbo in self.slackbuilds:
            status(0.03)
            if _sbo in self.data and _sbo not in self.blacklist:
                sbo_deps = Requires(self.flag).sbo(_sbo)
                self.deps += sbo_deps
                self.deps_dict[_sbo] = self.one_for_all(sbo_deps)
                self.package_found.append(_sbo)
            else:
                self.package_not_found.append(_sbo)
        self.update_deps()

        if not self.package_found:
            self.match = True
            self.matching()

        self.master_packages, mas_src = self.sbo_version_source(
            self.package_found)
        self.msg.done()
        if (self.meta.rsl_deps in ["on", "ON"] and
                self.flag != "--resolve-off" and not self.match):
            self.msg.resolving()
        self.dependencies, dep_src = self.sbo_version_source(
            self.one_for_all(self.deps))
        if (self.meta.rsl_deps in ["on", "ON"] and
                self.flag != "--resolve-off" and not self.match):
            self.msg.done()
        self.clear_masters()

        if self.package_found:
            if self.match and [""] != self.slackbuilds:
                self.msg.matching(self.slackbuilds)
            else:
                print("\nThe following packages will be automatically "
                      "installed or upgraded \nwith new version:\n")
            self.top_view()
            self.msg.upg_inst(self.is_upgrade)

            # view master packages
            for sbo, arch in zip(self.master_packages, mas_src):
                tagc = self.tag(sbo)
                name = "-".join(sbo.split("-")[:-1])
                self.view_packages(tagc, name, sbo.split("-")[-1],
                                   self.select_arch(arch))
            self.view_installing_for_deps()

            # view dependencies
            for dep, arch in zip(self.dependencies, dep_src):
                tagc = self.tag(dep)
                name = "-".join(dep.split("-")[:-1])
                self.view_packages(tagc, name, dep.split("-")[-1],
                                   self.select_arch(arch))

            count_total = sum([self.count_ins, self.count_upg,
                               self.count_uni])
            if self.match and [""] != self.slackbuilds:
                print("\nMatching summary")
                print("=" * 79)
                print("Total {0} matching packages\n".format(count_total))
                raise SystemExit(1)
            print("\nInstalling summary")
            print("=" * 79)
            print("{0}Total {1} {2}.".format(
                self.meta.color["GREY"], count_total,
                self.msg.pkg(count_total)))
            print("{0} {1} will be installed, {2} already installed and "
                  "{3} {4}".format(self.count_uni,
                                   self.msg.pkg(self.count_uni),
                                   self.count_ins, self.count_upg,
                                   self.msg.pkg(self.count_upg)))
            print("will be upgraded.{0}\n".format(self.meta.color["ENDC"]))
            self.continue_to_install()
        else:
            self.msg.not_found(self.is_upgrade)
            raise SystemExit(1)