From 44d2b7d102944de678e24fc4b45131aacfd7a3cd Mon Sep 17 00:00:00 2001
From: Jannis Pohlmann <jannis.pohlmann@codethink.co.uk>
Date: Thu, 22 Mar 2012 20:04:58 +0000
Subject: Squashme: Temporary changes to make boot with btrfs work.

This is achieved by copying vmlinuz, System.map and extlinux.conf
to the default subvolume.
---
 morphlib/builder.py | 58 +++++++++++++++++++++++++++++------------------------
 1 file changed, 32 insertions(+), 26 deletions(-)

(limited to 'morphlib/builder.py')

diff --git a/morphlib/builder.py b/morphlib/builder.py
index d63f1886..41f2fab2 100644
--- a/morphlib/builder.py
+++ b/morphlib/builder.py
@@ -433,11 +433,12 @@ class SystemBuilder(BlobBuilder): # pragma: no cover
             self._create_subvolume(factory_path)
             self._unpack_strata(factory_path)
             self._create_fstab(factory_path)
-            boot_path = os.path.join(mount_point, 'boot')
-            self._install_boot_files(factory_path, boot_path)
-            self._install_extlinux(mount_point)
+            self._create_extlinux_config(factory_path)
             self._create_subvolume_snapshot(
                     mount_point, 'factory', 'factory-run')
+            factory_run_path = os.path.join(mount_point, 'factory-run')
+            self._install_boot_files(factory_run_path, mount_point)
+            self._install_extlinux(mount_point)
             self._unmount(mount_point)
         except BaseException:
             self._unmount(mount_point)
@@ -517,36 +518,41 @@ class SystemBuilder(BlobBuilder): # pragma: no cover
             with open(fstab, 'w') as f:
                 f.write('proc      /proc proc  defaults          0 0\n')
                 f.write('sysfs     /sys  sysfs defaults          0 0\n')
-                f.write('/dev/disk/by-label/baserock / btrfs errors=remount-ro 0 1\n')
+                f.write('/dev/sda1 / btrfs errors=remount-ro 0 1\n')
 
-    def _install_boot_files(self, subvolume, destination):
-        os.mkdir(destination)
-        self.ex.runv(['cp', os.path.join(subvolume, 'boot', 'vmlinuz'),
-                      os.path.join(destination, 'vmlinuz')])
-
-    def _install_extlinux(self, path):
-        with self.build_watch('install-bootloader'):
-            conf = os.path.join(path, 'extlinux.conf')
-            logging.debug('configure extlinux %s' % conf)
-            with open(conf, 'w') as f:
-                f.write('default linux\n')
-                f.write('timeout 1\n')
-                f.write('label linux\n')
-                f.write('kernel /boot/vmlinuz\n')
-                f.write('append root=/dev/disk/by-label/baserock rootflags=subvol=factory-run init=/sbin/init quiet rw\n')
-
-            self.ex.runv(['extlinux', '--install', '%s' % path])
-            
-            # Weird hack that makes extlinux work. 
-            # FIXME: There is a bug somewhere.
-            self.ex.runv(['sync'])
-            time.sleep(2)
+    def _create_extlinux_config(self, path):
+        config = os.path.join(path, 'extlinux.conf')
+        with open(config, 'w') as f:
+            f.write('default linux\n')
+            f.write('timeout 1\n')
+            f.write('label linux\n')
+            f.write('kernel /boot/vmlinuz\n')
+            f.write('append root=/dev/sda1 rootflags=subvol=factory-run init=/sbin/init quiet rw\n')
 
     def _create_subvolume_snapshot(self, path, source, target):
         with self.build_watch('create-subvolume-snapshot'):
             self.ex.runv(['btrfs', 'subvolume', 'snapshot', source, target],
                          cwd=path)
 
+    def _install_boot_files(self, sourcefs, targetfs):
+        with self.build_watch('install-boot-files'):
+            logging.debug('installing boot files into root volume')
+            shutil.copy2(os.path.join(sourcefs, 'extlinux.conf'),
+                         os.path.join(targetfs, 'extlinux.conf'))
+            os.mkdir(os.path.join(targetfs, 'boot'))
+            shutil.copy2(os.path.join(sourcefs, 'boot', 'vmlinuz'),
+                         os.path.join(targetfs, 'boot', 'vmlinuz'))
+            shutil.copy2(os.path.join(sourcefs, 'boot', 'System.map'),
+                         os.path.join(targetfs, 'boot', 'System.map'))
+
+    def _install_extlinux(self, path):
+        with self.build_watch('install-bootloader'):
+            self.ex.runv(['extlinux', '--install', path])
+
+            # FIXME this hack seems to be necessary to let extlinux finish
+            self.ex.runv(['sync'])
+            time.sleep(2)
+
     def _unmount(self, mount_point):
         if mount_point is not None:
             with self.build_watch('unmount-filesystem'):
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