support incremental deb image generation

Change from V1: fix do_rootfs error while using dash as default shell

The following is the test case about how to test incremental deb image generation:

1, Modify a package
1) Add the follow config option to a conf file:
INC_DEB_IMAGE_GEN = "1"
PACKAGE_CLASSES = "package_deb"

2) Run `bitbake core-image-sato' and test the image could work correctly.

3) Modify a package, such as busybox_1.20.2.bb.

4) Run `bitbake core-image-sato'

5) vim log.do_rootfs to see if the following log exists:

    `NOTE: Updating ***'

6) runqemu qemux86

2, Remove a package
1) Add the following line to conf/local.conf:
INC_DEB_IMAGE_GEN = "1"
PACKAGE_CLASSES = "package_deb"

2) Run "bitbake core-image-sato" to build an image

3) Comment out IMAGE_FEATURES in /meta/recipes-sato/images/core-image-sato.bb

4) Run "bitbake core-image-sato" to build an image

5) vim log.do_rootfs to see if the following log exists:

    `NOTE: Removing ***'

3, Add a package
1) Add the following line to conf/local.conf:
INC_DEB_IMAGE_GEN = "1"
PACKAGE_CLASSES = "package_deb"
2) Do the above removing case.

3) Uncomment IMAGE_FEATURES in /meta/recipes-sato/images/core-image-sato.bb

4) Run `bitbake core-image-sato' to build an image

5) runqemu qemux86

The following changes since commit 75f470cd18d693a9a96d9849291c2c8de4dcbeb8:

qt4: Add space for _appends (2013-02-01 22:49:47 +0000)

are available in the git repository at:

git://git.pokylinux.org/poky-contrib hongxu/incremental-deb-image
http://git.pokylinux.org/cgit.cgi/poky-contrib/log/?h=hongxu/incremental-deb-image

Hongxu Jia (5):
apt-native:fix support configuring etc dir in apt.conf image.bbclass:support incremental deb image generation populate_sdk:support incremental deb image generation rootfs_deb.bbclass:support incremental deb image generation package_deb.bbclass:support incremental deb image generation

 meta/classes/image.bbclass                     |   37 ++-
 meta/classes/package_deb.bbclass               |  390 ++++++++++++++++++++++--
 meta/classes/populate_sdk_base.bbclass         |   13 +-
 meta/classes/populate_sdk_deb.bbclass          |    2 +-
 meta/classes/rootfs_deb.bbclass                |   58 +++-
 meta/recipes-devtools/apt/apt-native_0.7.14.bb |    2 +-
 meta/recipes-devtools/apt/files/apt.conf       |    2 +-
 7 files changed, 452 insertions(+), 52 deletions(-)

1.7.10.4