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wic: rawcopy: Add support for packed images

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Add support for packed images to wic rawcopy handler do minimize disk
usage in deploy directory and reuse of packed images between wic and
swupdate. Add `unpack` to sourceparams to unpack an bz2, gz and xz
archives.

Example:
part / --source rawcopy --sourceparams="file=core-image-minimal-qemu.ext4.gz,unpack"

(From OE-Core rev: 4c97d25791389ece041565981ba3207ce9949a1a)

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Stefan Herbrechtsmeier 2022-02-14 16:45:18 +01:00 committed by Richard Purdie
parent 5d16ba9078
commit 0c20edddfc
1 changed files with 28 additions and 1 deletions
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29
scripts/lib/wic/plugins/source/rawcopy.py
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@ -4,6 +4,8 @@
import logging
import os
import signal
import subprocess
from wic import WicError
from wic.pluginbase import SourcePlugin
@ -38,6 +40,25 @@ class RawCopyPlugin(SourcePlugin):
exec_cmd(cmd)
@staticmethod
def do_image_uncompression(src, dst, workdir):
def subprocess_setup():
# Python installs a SIGPIPE handler by default. This is usually not what
# non-Python subprocesses expect.
# SIGPIPE errors are known issues with gzip/bash
signal.signal(signal.SIGPIPE, signal.SIG_DFL)
extension = os.path.splitext(src)[1]
decompressor = {
".bz2": "bzip2",
".gz": "gzip",
".xz": "xz"
}.get(extension)
if not decompressor:
raise WicError("Not supported compressor filename extension: %s" % extension)
cmd = "%s -dc %s > %s" % (decompressor, src, dst)
subprocess.call(cmd, preexec_fn=subprocess_setup, shell=True, cwd=workdir)
@classmethod
def do_prepare_partition(cls, part, source_params, cr, cr_workdir,
oe_builddir, bootimg_dir, kernel_dir,
@ -56,7 +77,13 @@ class RawCopyPlugin(SourcePlugin):
if 'file' not in source_params:
raise WicError("No file specified")
src = os.path.join(kernel_dir, source_params['file'])
if 'unpack' in source_params:
img = os.path.join(kernel_dir, source_params['file'])
src = os.path.join(cr_workdir, os.path.splitext(source_params['file'])[0])
RawCopyPlugin.do_image_uncompression(img, src, cr_workdir)
else:
src = os.path.join(kernel_dir, source_params['file'])
dst = os.path.join(cr_workdir, "%s.%s" % (os.path.basename(source_params['file']), part.lineno))
if not os.path.exists(os.path.dirname(dst)):