[OE-core] [RFC-WIP 1/3] classes/image*: Revamp creation of live images

[Richard Purdie]

On Tue, 2011-07-26 at 01:24 -0700, Saul Wold wrote:
> This creates a live image as an IMAGE_FSTYPES, thus removing the
> need to have additional -live.bb recipes.  To create a live image
> one just needs to add live to the IMAGE_FSTYPES list
> 
> Signed-off-by: Saul Wold <sgw at linux.intel.com>
> ---
>  .../{bootimg.bbclass => image-live.bbclass}        |   11 +++++++++++
>  meta/classes/image.bbclass                         |    3 +++
>  meta/classes/image_types.bbclass                   |   20 ++++++++++++++++++--
>  3 files changed, 32 insertions(+), 2 deletions(-)
>  create mode 100644 meta/classes/image-empty.bbclass
>  rename meta/classes/{bootimg.bbclass => image-live.bbclass} (91%)
> 
> diff --git a/meta/classes/image-empty.bbclass b/meta/classes/image-empty.bbclass
> new file mode 100644
> index 0000000..e69de29
> diff --git a/meta/classes/bootimg.bbclass b/meta/classes/image-live.bbclass
> similarity index 91%
> rename from meta/classes/bootimg.bbclass
> rename to meta/classes/image-live.bbclass
> index 49ee85e..c9cd524 100644
> --- a/meta/classes/bootimg.bbclass
> +++ b/meta/classes/image-live.bbclass
> @@ -25,6 +25,17 @@
>  # ${APPEND} - an override list of append strings for each label
>  # ${SYSLINUX_OPTS} - additional options to add to the syslinux file ';' delimited 
>  
> +AUTO_SYSLINUXCFG = "1"
> +INITRD = "${DEPLOY_DIR_IMAGE}/core-image-minimal-initramfs-${MACHINE}.cpio.gz"
> +APPEND += "root=/dev/ram0 "
> +TIMEOUT = "10"
> +LABELS += "boot install"
> +
> +ROOTFS = "${DEPLOY_DIR_IMAGE}/${IMAGE_BASENAME}-${MACHINE}.ext3"
> +
> +do_bootimg[depends] += "core-image-minimal-initramfs:do_rootfs"
> +do_bootimg[depends] += "${IMAGE_BASENAME}:do_rootfs"
> +
>  do_bootimg[depends] += "dosfstools-native:do_populate_sysroot \
>                         syslinux:do_populate_sysroot \
>                         syslinux-native:do_populate_sysroot \

It might be an idea to leave bootimg.bbclass as is for anyone using it
as it currently stands and make this image-xxx.bbclass inherit it?


> diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
> index edfb2d6..79a56f0 100644
> --- a/meta/classes/image.bbclass
> +++ b/meta/classes/image.bbclass
> @@ -29,6 +29,9 @@ LDCONFIGDEPEND_libc-uclibc = ""
>  do_rootfs[depends] += "makedevs-native:do_populate_sysroot virtual/fakeroot-native:do_populate_sysroot ${LDCONFIGDEPEND}"
>  do_rootfs[depends] += "virtual/update-alternatives-native:do_populate_sysroot update-rc.d-native:do_populate_sysroot"
>  
> +IMAGE_TYPE = ${@base_contains("IMAGE_FSTYPES", "live", "live", "empty", d)}
> +inherit image-${IMAGE_TYPE}
> +
>  python () {
>      deps = bb.data.getVarFlag('do_rootfs', 'depends', d) or ""
>      for type in (bb.data.getVar('IMAGE_FSTYPES', d, True) or "").split():
> diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
> index 1108802..1efdf06 100644
> --- a/meta/classes/image_types.bbclass
> +++ b/meta/classes/image_types.bbclass
> @@ -1,7 +1,23 @@
> +
>  def get_imagecmds(d):
>      cmds = "\n"
>      old_overrides = bb.data.getVar('OVERRIDES', d, 0)
> -    for type in bb.data.getVar('IMAGE_FSTYPES', d, True).split():
> +
> +    types = bb.data.getVar('IMAGE_FSTYPES', d, True).split()

Er, how about:

if "live" in types:
    # For live images, ensure they get processed last
    # live images also depend on ext3 so ensure its present
    types.remove("live")
    if "ext3" not in types:
        types.append("ext3")
    types.append("live")

> +    try:
> +        live_pos = types.index("live")
> +        try:
> +            ext3_pos = types.index("ext3")
> +        except ValueError:
> +            types.insert(live_pos, "ext3")
> +        else:
> +            if ext3_pos > live_pos:
> +                types.pop(live_pos)
> +                #types.append("live")
> +    except ValueError:
> +        pass
> +
> +    for type in types:
>          localdata = bb.data.createCopy(d)
>          localdata.setVar('OVERRIDES', '%s:%s' % (type, old_overrides))
>          bb.data.update_data(localdata)
> @@ -103,4 +119,4 @@ IMAGE_DEPENDS_ubi = "mtd-utils-native"
>  IMAGE_DEPENDS_ubifs = "mtd-utils-native"
>  
>  # This variable is available to request which values are suitable for IMAGE_FSTYPES
> -IMAGE_TYPES = "jffs2 cramfs ext2 ext2.gz ext3 ext3.gz squashfs squashfs-lzma ubi"
> +IMAGE_TYPES = "jffs2 cramfs ext2 ext2.gz ext3 ext3.gz live squashfs squashfs-lzma ubi"

Otherwise looks good :)

Cheers,

Richard