wic: Add mic w/pykickstart

This is the starting point for the implemention described in [YOCTO
3847] which came to the conclusion that it would make sense to use
kickstart syntax to implement image creation in OpenEmbedded.  I
subsequently realized that there was an existing tool that already
implemented image creation using kickstart syntax, the Tizen/Meego mic
tool.  As such, it made sense to use that as a starting point - this
commit essentially just copies the relevant Python code from the MIC
tool to the scripts/lib dir, where it can be accessed by the
previously created wic tool.

Most of this will be removed or renamed by later commits, since we're
initially focusing on partitioning only.  Care should be taken so that
we can easily add back any additional functionality should we decide
later to expand the tool, though (we may also want to contribute our
local changes to the mic tool to the Tizen project if it makes sense,
and therefore should avoid gratuitous changes to the original code if
possible).

Added the /mic subdir from Tizen mic repo as a starting point:

 git clone git://review.tizen.org/tools/mic.git

 For reference, the top commit:

 commit 20164175ddc234a17b8a12c33d04b012347b1530
 Author: Gui Chen <gui.chen@intel.com>
 Date:   Sun Jun 30 22:32:16 2013 -0400

    bump up to 0.19.2

Also added the /plugins subdir, moved to under the /mic subdir (to
match the default plugin_dir location in mic.conf.in, which was
renamed to yocto-image.conf (moved and renamed by later patches) and
put into /scripts.

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 279 insertions, 0 deletions

diff --git a/scripts/lib/mic/bootstrap.py b/scripts/lib/mic/bootstrap.py
new file mode 100644
index 0000000000..66c291b0a8
--- /dev/null
+++ b/scripts/lib/mic/bootstrap.py
@@ -0,0 +1,279 @@
+#!/usr/bin/python -tt
+#
+# Copyright (c) 2009, 2010, 2011 Intel, Inc.
+#
+# 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; version 2 of the License
+#
+# 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.
+
+from __future__ import with_statement
+import os
+import sys
+import tempfile
+import shutil
+import subprocess
+import rpm
+from mic import msger
+from mic.utils import errors, proxy, misc
+from mic.utils.rpmmisc import readRpmHeader, RPMInstallCallback
+from mic.chroot import cleanup_mounts, setup_chrootenv, cleanup_chrootenv
+
+PATH_BOOTSTRAP = "/usr/sbin:/usr/bin:/sbin:/bin"
+
+RPMTRANS_FLAGS = [
+                   rpm.RPMTRANS_FLAG_ALLFILES,
+                   rpm.RPMTRANS_FLAG_NOSCRIPTS,
+                   rpm.RPMTRANS_FLAG_NOTRIGGERS,
+                 ]
+
+RPMVSF_FLAGS = [
+                 rpm._RPMVSF_NOSIGNATURES,
+                 rpm._RPMVSF_NODIGESTS
+               ]
+
+RPMPROB_FLAGS = [
+                  rpm.RPMPROB_FILTER_OLDPACKAGE,
+                  rpm.RPMPROB_FILTER_REPLACEPKG,
+                  rpm.RPMPROB_FILTER_IGNOREARCH
+                ]
+
+class MiniBackend(object):
+    def __init__(self, rootdir, arch=None, repomd=None):
+        self._ts = None
+        self.rootdir = os.path.abspath(rootdir)
+        self.arch = arch
+        self.repomd = repomd
+        self.dlpkgs = []
+        self.localpkgs = {}
+        self.optionals = []
+        self.preins = {}
+        self.postins = {}
+        self.scriptlets = False
+
+    def __del__(self):
+        try:
+            del self.ts
+        except:
+            pass
+
+    def get_ts(self):
+        if not self._ts:
+            self._ts = rpm.TransactionSet(self.rootdir)
+            self._ts.setFlags(reduce(lambda x, y: x|y, RPMTRANS_FLAGS))
+            self._ts.setVSFlags(reduce(lambda x, y: x|y, RPMVSF_FLAGS))
+            self._ts.setProbFilter(reduce(lambda x, y: x|y, RPMPROB_FLAGS))
+
+        return self._ts
+
+    def del_ts(self):
+        if self._ts:
+            self._ts.closeDB()
+            self._ts = None
+
+    ts = property(fget = lambda self: self.get_ts(),
+                  fdel = lambda self: self.del_ts(),
+                  doc="TransactionSet object")
+
+    def selectPackage(self, pkg):
+        if not pkg in self.dlpkgs:
+            self.dlpkgs.append(pkg)
+
+    def runInstall(self):
+        # FIXME: check space
+        self.downloadPkgs()
+        self.installPkgs()
+
+        if not self.scriptlets:
+            return
+
+        for pkg in self.preins.keys():
+            prog, script = self.preins[pkg]
+            self.run_pkg_script(pkg, prog, script, '0')
+        for pkg in self.postins.keys():
+            prog, script = self.postins[pkg]
+            self.run_pkg_script(pkg, prog, script, '1')
+
+    def downloadPkgs(self):
+        nonexist = []
+        for pkg in self.dlpkgs:
+            localpth = misc.get_package(pkg, self.repomd, self.arch)
+            if localpth:
+                self.localpkgs[pkg] = localpth
+            elif pkg in self.optionals:
+                # skip optional rpm
+                continue
+            else:
+                # mark nonexist rpm
+                nonexist.append(pkg)
+
+        if nonexist:
+            raise errors.BootstrapError("Can't get rpm binary: %s" %
+                                        ','.join(nonexist))
+
+    def installPkgs(self):
+        for pkg in self.localpkgs.keys():
+            rpmpath = self.localpkgs[pkg]
+
+            hdr = readRpmHeader(self.ts, rpmpath)
+
+            # save prein and postin scripts
+            self.preins[pkg] = (hdr['PREINPROG'], hdr['PREIN'])
+            self.postins[pkg] = (hdr['POSTINPROG'], hdr['POSTIN'])
+
+            # mark pkg as install
+            self.ts.addInstall(hdr, rpmpath, 'u')
+
+        # run transaction
+        self.ts.order()
+        cb = RPMInstallCallback(self.ts)
+        self.ts.run(cb.callback, '')
+
+    def run_pkg_script(self, pkg, prog, script, arg):
+        mychroot = lambda: os.chroot(self.rootdir)
+
+        if not script:
+            return
+
+        if prog == "<lua>":
+            prog = "/usr/bin/lua"
+
+        tmpdir = os.path.join(self.rootdir, "tmp")
+        if not os.path.exists(tmpdir):
+            os.makedirs(tmpdir)
+        tmpfd, tmpfp = tempfile.mkstemp(dir=tmpdir, prefix="%s.pre-" % pkg)
+        script = script.replace('\r', '')
+        os.write(tmpfd, script)
+        os.close(tmpfd)
+        os.chmod(tmpfp, 0700)
+
+        try:
+            script_fp = os.path.join('/tmp', os.path.basename(tmpfp))
+            subprocess.call([prog, script_fp, arg], preexec_fn=mychroot)
+        except (OSError, IOError), err:
+            msger.warning(str(err))
+        finally:
+            os.unlink(tmpfp)
+
+class Bootstrap(object):
+    def __init__(self, rootdir, distro, arch=None):
+        self.rootdir = misc.mkdtemp(dir=rootdir, prefix=distro)
+        self.distro = distro
+        self.arch = arch
+        self.logfile = None
+        self.pkgslist = []
+        self.repomd = None
+
+    def __del__(self):
+        self.cleanup()
+
+    def get_rootdir(self):
+        if os.path.exists(self.rootdir):
+            shutil.rmtree(self.rootdir, ignore_errors=True)
+        os.makedirs(self.rootdir)
+        return self.rootdir
+
+    def dirsetup(self, rootdir=None):
+        _path = lambda pth: os.path.join(rootdir, pth.lstrip('/'))
+
+        if not rootdir:
+            rootdir = self.rootdir
+
+        try:
+            # make /tmp and /etc path
+            tmpdir = _path('/tmp')
+            if not os.path.exists(tmpdir):
+                os.makedirs(tmpdir)
+            etcdir = _path('/etc')
+            if not os.path.exists(etcdir):
+                os.makedirs(etcdir)
+
+            # touch distro file
+            tzdist = _path('/etc/%s-release' % self.distro)
+            if not os.path.exists(tzdist):
+                with open(tzdist, 'w') as wf:
+                    wf.write("bootstrap")
+        except:
+            pass
+
+    def create(self, repomd, pkglist, optlist=()):
+        try:
+            pkgmgr = MiniBackend(self.get_rootdir())
+            pkgmgr.arch = self.arch
+            pkgmgr.repomd = repomd
+            pkgmgr.optionals = list(optlist)
+            map(pkgmgr.selectPackage, pkglist + list(optlist))
+            pkgmgr.runInstall()
+        except (OSError, IOError, errors.CreatorError), err:
+            raise errors.BootstrapError("%s" % err)
+
+    def run(self, cmd, chdir, rootdir=None, bindmounts=None):
+        def mychroot():
+            os.chroot(rootdir)
+            os.chdir(chdir)
+
+        def sync_timesetting(rootdir):
+            try:
+                # sync time and zone info to bootstrap
+                if os.path.exists(rootdir + "/etc/localtime"):
+                    os.unlink(rootdir + "/etc/localtime")
+                shutil.copyfile("/etc/localtime", rootdir + "/etc/localtime")
+            except:
+                pass
+
+        def sync_passwdfile(rootdir):
+            try:
+                # sync passwd file to bootstrap, saving the user info
+                if os.path.exists(rootdir + "/etc/passwd"):
+                    os.unlink(rootdir + "/etc/passwd")
+                shutil.copyfile("/etc/passwd", rootdir + "/etc/passwd")
+            except:
+                pass
+
+        if not rootdir:
+            rootdir = self.rootdir
+
+        if isinstance(cmd, list):
+            shell = False
+        else:
+            shell = True
+
+        env = os.environ
+        env['PATH'] = "%s:%s" % (PATH_BOOTSTRAP, env['PATH'])
+
+        retcode = 0
+        gloablmounts = None
+        try:
+            proxy.set_proxy_environ()
+            gloablmounts = setup_chrootenv(rootdir, bindmounts, False)
+            sync_timesetting(rootdir)
+            sync_passwdfile(rootdir)
+            retcode = subprocess.call(cmd, preexec_fn=mychroot, env=env, shell=shell)
+        except (OSError, IOError):
+            # add additional information to original exception
+            value, tb = sys.exc_info()[1:]
+            value = '%s: %s' % (value, ' '.join(cmd))
+            raise RuntimeError, value, tb
+        finally:
+            if self.logfile and os.path.isfile(self.logfile):
+                msger.log(file(self.logfile).read())
+            cleanup_chrootenv(rootdir, bindmounts, gloablmounts)
+            proxy.unset_proxy_environ()
+        return retcode
+
+    def cleanup(self):
+        try:
+            # clean mounts
+            cleanup_mounts(self.rootdir)
+            # remove rootdir
+            shutil.rmtree(self.rootdir, ignore_errors=True)
+        except:
+            pass