diff options
Diffstat (limited to 'build_tools/larch8/larch0/cli/archin.py')
| -rwxr-xr-x | build_tools/larch8/larch0/cli/archin.py | 380 |
1 files changed, 380 insertions, 0 deletions
diff --git a/build_tools/larch8/larch0/cli/archin.py b/build_tools/larch8/larch0/cli/archin.py new file mode 100755 index 0000000..0dc7306 --- /dev/null +++ b/build_tools/larch8/larch0/cli/archin.py @@ -0,0 +1,380 @@ +#!/usr/bin/env python2 +# +# archin.py +# +# (c) Copyright 2010 Michael Towers (larch42 at googlemail dot com) +# +# This file is part of the larch project. +# +# larch 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. +# +# larch 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 larch; if not, write to the Free Software Foundation, Inc., +# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +# +#---------------------------------------------------------------------------- +# 2010.10.04 + +# This is a command line script to perform an Arch Linux installation +# based on a list of packages. All needed parameters are passed as options. + +import os +from glob import glob +from backend import * + +class Installation: + def __init__(self, options): + self.options = options + self.installation_dir = get_installation_dir() + if self.installation_dir == '/': + errout(_("Operations on '/' are not supported ...")) + + self.profile_dir = get_profile() + self.pacman_cmd = self.make_pacman_command() + self.make_pacman_conf() + + + def make_pacman_command(self): + """Construct pacman command. Return the command, including options. + This includes options for installation path, cache directory and + for suppressing the progress bar. It assumes a temporary location + for pacman.conf, which must also be set up. + If there is no pacman executable in the system PATH, check that + it is available in the larch directory. + """ + pacman = runcmd('bash -c "which pacman || echo _FAIL_"')[1][-1].strip() + if pacman == '_FAIL_': + # If the host is not Arch, there will probably be no pacman + # (if there is some other program called 'pacman' that's + # a real spanner in the works). + # The alternative is to provide it in the larch directory. + pacman = base_dir + '/pacman' + if not os.path.isfile(pacman): + errout(_("No pacman executable found")) + + pacman += (' -r %s --config %s --noconfirm' + % (self.installation_dir, PACMAN_CONF)) + if self.options.noprogress: + pacman += ' --noprogressbar' + if self.options.cache: + pacman += ' --cachedir ' + self.options.cache + return pacman + + + def make_pacman_conf(self, final=False): + """Construct the pacman.conf file used by larch. + To make it a little easier to manage upstream changes to the default + pacman.conf, a separate file (pacman.conf.repos) is used to specify + the repositories to use. The contents of this file are used to modify + the basic pacman.conf file, which may be the default version or one + provided in the profile. + The 'final' parameter determines whether the version for the resulting + live system (True) or for the installation process (False) is + generated. If generating the installation version, it is possible + to specify alternative repositories, via the 'repofile' option, + which allows the pacman.conf used for the installation to be + different from the version in the resulting live system. + The return value is a list of the names of the repositories which + are included. + It is also possible to specify just a customized mirrorlist for the + installation by placing it in the working directory. + """ + # Allow use of '*platform*' in pacman.conf.repos + platform = os.uname()[4] + if platform != 'x86_64': + platform = 'i686' + + # Get pacman.conf header part + pc0 = self.profile_dir + '/pacman.conf.options' + if not os.path.isfile(pc0): + pc0 = base_dir + '/data/pacman.conf' + pacmanconf = self.pacmanoptions(readfile(pc0)) + + # Get file with repository entries + pc1 = self.profile_dir + '/pacman.conf.repos' + if not os.path.isfile(pc1): + pc1 = base_dir + '/data/pacman.conf.repos' + if self.options.repofile and not final: + pc1 = os.path.realpath(self.options.repofile) + + # Get repository path + if final: + default = 'Include = /etc/pacman.d/mirrorlist' + else: + mlist = cwd + '/mirrorlist' + if not os.path.isfile(mlist): + mlist = '/etc/pacman.d/mirrorlist' + if not os.path.isfile(mlist): + mlist = base_dir + '/data/mirrorlist' + default = 'Include = ' + mlist + + # Read repository entries + repos = [] + for line in readfile(pc1).splitlines(): + line = line.strip() + if (not line) or (line[0] == '#'): + continue + r, s = [t.strip() for t in line.split(':', 1)] + repos.append(r) + s = s.replace('*default*', default) + pacmanconf += ('\n[%s]\n%s\n' + % (r, s.replace('*platform*', platform))) + + + writefile(pacmanconf, self.installation_dir + '/etc/pacman.conf' + if final else PACMAN_CONF) + return repos + + + def install(self): + """Clear the chosen installation directory and install the base + set of packages, together with any additional ones listed in the + file 'addedpacks' (in the profile), removing the packages in + 'vetopacks' from the list. + """ + if not query_yn(_("Install Arch to '%s'?") % self.installation_dir): + return False + # Can't delete the whole directory because it might be a mount point + if os.path.isdir(self.installation_dir): + if script('cleardir %s' % self.installation_dir): + return False + + # Ensure installation directory exists and check that device nodes + # can be created (creating /dev/null is also a workaround for an + # Arch bug - which may have been fixed, but this does no harm) + if not (runcmd('bash -c "mkdir -p %s/{dev,proc,sys}"' + % self.installation_dir)[0] + and runcmd('mknod -m 666 %s/dev/null c 1 3' + % self.installation_dir)[0]): + errout(_("Couldn't write to the installation path (%s)") + % self.installation_dir) + if not runcmd('bash -c "echo test >%s/dev/null"' + % self.installation_dir)[0]: + errout(_("The installation path (%s) is mounted 'nodev'.") + % self.installation_dir) + + # I should also check that it is possible to run stuff in the + # installation directory. + runcmd('bash -c "cp $( which echo ) %s"' % self.installation_dir) + if not runcmd('%s/echo "yes"' % self.installation_dir)[0]: + errout(_("The installation path (%s) is mounted 'noexec'.") + % self.installation_dir) + runcmd('rm %s/echo' % self.installation_dir) + + # Fetch package database + runcmd('mkdir -p %s/var/lib/pacman' % self.installation_dir) + self.refresh() + + # Get list of vetoed packages. + self.packages = [] + self.veto_packages = [] + self.add_packsfile(self.profile_dir, 'vetopacks', must=False) + self.veto_packages = self.packages + + # Include 'required' packages (these can still be vetoed, but + # in some cases that will mean a larch system cannot be built) + self.packages = [] + self.add_packsfile(base_dir + '/data', 'requiredpacks') + + # Add additional packages and groups, from 'addedpacks' file. + self.add_packsfile(self.profile_dir, 'addedpacks') + + # Now do the actual installation. + ok = self.pacmancall('-S', ' '.join(self.packages)) + if not ok: + errout(_("Package installation failed")) + + # Some chroot scripts might need /etc/mtab + runcmd('bash -c ":> %s/etc/mtab"' % self.installation_dir) + + # Build the final version of pacman.conf + self.make_pacman_conf(True) + comment(" *** %s ***" % _("Arch installation completed")) + return True + + + def add_packsfile(self, dir, packs_file, must=True): + path = dir + '/' + packs_file + if must and not os.path.isfile(path): + errout(_("No '%s' file") % path) + fh = open(path) + for line in fh: + line = line.strip() + if line and (line[0] != '#'): + if line[0] == '*': + self.add_group(line[1:].split()[0]) + elif line[0] == '+': + # Include directive + line = line[1:].split()[0] + if line[0] != '/': + line = dir + '/' + line + d, pf = line.rsplit('/', 1) + if not d: + errout(_("Invalid package file include: %s")) + self.add_packsfile(d, pf) + elif line.startswith('!!!'): + # Ignore everything (!) entered previously. + # Allows requiredpacks to be overridden in addedpacks. + self.packages = [] + else: + line = line.split()[0] + if ((line not in self.packages) + and (line not in self.veto_packages)): + self.packages.append(line) + fh.close() + + + def add_group(self, gname): + """Add the packages belonging to a group to the installaion list, + removing any in the veto list. + """ + # In the next line the call could be done as a normal user. + for line in runcmd('%s -Sg %s' % (self.pacman_cmd, gname))[1]: + l = line.split() + if l and (l[0] == gname) and (l[1] not in self.veto_packages): + self.packages.append(l[1]) + + + def refresh(self): + """This updates or creates the pacman-db in the installation. + This is done using using 'pacman ... -Sy' together with the + customized pacman.conf file. + """ + if not runcmd(self.pacman_cmd + ' -Sy', + filter=pacman_filter_gen())[0]: + errout(_("Couldn't synchronize pacman database (pacman -Sy)")) + return True + + + def pacmancall(self, op, arg=''): + """Mount-bind the sys and proc directories before calling the + pacman command built by make_pacman_command to perform operation + 'op' (e.g. '-S') with argument(s) 'arg' (a string). + Then unmount sys and proc and return True if the command succeeded. + """ + # (a) Prepare the destination environment (bind mounts) + mount("/sys", "%s/sys" % self.installation_dir, "--bind") + mount("/proc", "%s/proc" % self.installation_dir, "--bind") + + # (b) Call pacman + ok = runcmd("%s %s %s" % (self.pacman_cmd, op, arg), + filter=pacman_filter_gen())[0] + + # (c) Remove bound mounts + unmount(("%s/sys" % self.installation_dir, + "%s/proc" % self.installation_dir)) + return ok + + + def pacmanoptions(self, text): + """A filter for pacman.conf to remove the repository info. + """ + texto = "" + block = "" + for line in text.splitlines(): + block += line + "\n" + if line.startswith("#["): + break + if line.startswith("[") and not line.startswith("[options]"): + break + if not line.strip(): + texto += block + block = "" + return texto + + + def sync(self, *packs): + return self.pacmancall('-S', ' '.join(packs)) + + + def update(self, *files): + return self.pacmancall('-U', ' '.join(files)) + + + def updateall(self, *files): + return self.pacmancall('-Su') + + + def remove(self, *packs): + return self.pacmancall('-Rs', ' '.join(packs)) + + + +if __name__ == "__main__": + cwd = os.getcwd() + + operations = 'install|sync|updateall|update|remove|refresh' + from optparse import OptionParser, OptionGroup + parser = OptionParser(usage=(_("usage: %%prog [options] %s [packages]") + % operations)) + + parser.add_option("-p", "--profile", action="store", type="string", + default="", dest="profile", + help=_("Profile: 'user:profile-name' or path to profile directory")) + parser.add_option("-i", "--installation-dir", action="store", type="string", + default="", dest="idir", + help=_("Path to directory to be larchified (default %s)") + % INSTALLATION) + parser.add_option("-s", "--slave", action="store_true", dest="slave", + default=False, help=_("Run as a slave from a controlling program" + " (e.g. from a gui)")) + parser.add_option("-q", "--quiet", action="store_true", dest="quiet", + default=False, help=_("Suppress output messages, except errors" + " (no effect if -s specified)")) + + + parser.add_option("-f", "--force", action="store_true", dest="force", + default=False, help=_("Don't ask for confirmation")) + + parser.add_option("-r", "--repofile", action="store", type="string", + default="", dest="repofile", + help=_("Supply a substitute repository list (pacman.conf.repos)" + " for the installation only")) + parser.add_option("-c", "--cache-dir", action="store", type="string", + default="", dest="cache", + help=_("pacman cache directory (default /var/cache/pacman/pkg)")) + parser.add_option("-n", "--noprogress", action="store_true", + dest="noprogress", + default=False, help=_("Don't show pacman's progress bar")) +## I think pacman is going to get support for something like '$arch', at +## which stage I could again consider architecture switching support in larch. +# parser.add_option("-a", "--arch", action="store", type="string", +# default="", dest="arch", +# help=_("processor architecture (x86_64|i686) - defaults to" +# " that of the host." +# " This is an untested feature, which is probably only partially" +# " implemented and may well not work.")) + + (options, args) = parser.parse_args() + if not args: + print _("You must specify which operation to perform:\n") + parser.print_help() + sys.exit(1) + + if os.getuid() != 0: + print _("This application must be run as root") + sys.exit(1) + + init('archin', options) + op = args[0] + if op not in operations.split('|'): + print (_("Invalid operation: '%s'\n") % op) + parser.print_help() + sys.exit(1) + + installation = Installation(options) + method = getattr(installation, op) + + if method(*args[1:]): + sys.exit(0) + else: + sys.exit(1) + |