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from oe.utils import execute_pre_post_process
import os
import subprocess
import multiprocessing
def generate_image(arg):
(type, subimages, create_img_cmd) = arg
bb.note("Running image creation script for %s: %s ..." %
(type, create_img_cmd))
try:
subprocess.check_output(create_img_cmd)
except subprocess.CalledProcessError as e:
return("Error: The image creation script '%s' returned %d:\n%s" %
(e.cmd, e.returncode, e.output))
return None
class Image(object):
def __init__(self, d):
self.d = d
def _get_rootfs_size(self):
"""compute the rootfs size"""
rootfs_alignment = int(self.d.getVar('IMAGE_ROOTFS_ALIGNMENT', True))
overhead_factor = float(self.d.getVar('IMAGE_OVERHEAD_FACTOR', True))
rootfs_req_size = int(self.d.getVar('IMAGE_ROOTFS_SIZE', True))
rootfs_extra_space = eval(self.d.getVar('IMAGE_ROOTFS_EXTRA_SPACE', True))
output = subprocess.check_output(['du', '-ks',
self.d.getVar('IMAGE_ROOTFS', True)])
size_kb = int(output.split()[0])
base_size = size_kb * overhead_factor
base_size = (base_size, rootfs_req_size)[base_size < rootfs_req_size] + \
rootfs_extra_space
if base_size != int(base_size):
base_size = int(base_size + 1)
base_size += rootfs_alignment - 1
base_size -= base_size % rootfs_alignment
return base_size
def _create_symlinks(self, subimages):
"""create symlinks to the newly created image"""
deploy_dir = self.d.getVar('DEPLOY_DIR_IMAGE', True)
img_name = self.d.getVar('IMAGE_NAME', True)
link_name = self.d.getVar('IMAGE_LINK_NAME', True)
manifest_name = self.d.getVar('IMAGE_MANIFEST', True)
os.chdir(deploy_dir)
if link_name is not None:
for type in subimages:
if os.path.exists(img_name + ".rootfs." + type):
dst = link_name + "." + type
src = img_name + ".rootfs." + type
bb.note("Creating symlink: %s -> %s" % (dst, src))
os.symlink(src, dst)
if manifest_name is not None and \
os.path.exists(manifest_name) and \
not os.path.exists(link_name + ".manifest"):
os.symlink(os.path.basename(manifest_name),
link_name + ".manifest")
def _remove_old_symlinks(self):
"""remove the symlinks to old binaries"""
if self.d.getVar('IMAGE_LINK_NAME', True):
deploy_dir = self.d.getVar('DEPLOY_DIR_IMAGE', True)
for img in os.listdir(deploy_dir):
if img.find(self.d.getVar('IMAGE_LINK_NAME', True)) == 0:
img = os.path.join(deploy_dir, img)
if os.path.islink(img):
if self.d.getVar('RM_OLD_IMAGE', True) == "1":
os.remove(os.path.realpath(img))
os.remove(img)
def _get_image_types(self):
"""returns a (types, cimages) tuple"""
alltypes = self.d.getVar('IMAGE_FSTYPES', True).split()
types = []
ctypes = self.d.getVar('COMPRESSIONTYPES', True).split()
cimages = {}
# Image type b depends on a having been generated first
def addtypedepends(a, b):
if a in alltypes:
alltypes.remove(a)
if b not in alltypes:
alltypes.append(b)
alltypes.append(a)
# The elf image depends on the cpio.gz image already having
# been created, so we add that explicit ordering here.
addtypedepends("elf", "cpio.gz")
# Filter out all the compressed images from alltypes
for type in alltypes:
basetype = None
for ctype in ctypes:
if type.endswith("." + ctype):
basetype = type[:-len("." + ctype)]
if basetype not in types:
types.append(basetype)
if basetype not in cimages:
cimages[basetype] = []
if ctype not in cimages[basetype]:
cimages[basetype].append(ctype)
break
if not basetype and type not in types:
types.append(type)
# Live and VMDK images will be processed via inheriting
# bbclass and does not get processed here.
# vmdk depend on live images also depend on ext3 so ensure its present
# Note: we need to ensure ext3 is in alltypes, otherwise, subimages may
# not contain ext3 and the .rootfs.ext3 file won't be created.
if "vmdk" in types:
if "ext3" not in types:
types.append("ext3")
if "ext3" not in alltypes:
alltypes.append("ext3")
types.remove("vmdk")
if "live" in types or "iso" in types or "hddimg" in types:
if "ext3" not in types:
types.append("ext3")
if "ext3" not in alltypes:
alltypes.append("ext3")
if "live" in types:
types.remove("live")
if "iso" in types:
types.remove("iso")
if "hddimg" in types:
types.remove("hddimg")
return (alltypes, types, cimages)
def _write_script(self, type, cmds):
tempdir = self.d.getVar('T', True)
script_name = os.path.join(tempdir, "create_image." + type)
self.d.setVar('img_creation_func', '\n'.join(cmds))
self.d.setVarFlag('img_creation_func', 'func', 1)
self.d.setVarFlag('img_creation_func', 'fakeroot', 1)
with open(script_name, "w+") as script:
script.write("%s" % bb.build.shell_trap_code())
script.write("export ROOTFS_SIZE=%d\n" % self._get_rootfs_size())
bb.data.emit_func('img_creation_func', script, self.d)
script.write("img_creation_func\n")
os.chmod(script_name, 0775)
return script_name
def _get_imagecmds(self):
old_overrides = self.d.getVar('OVERRIDES', 0)
alltypes, types, cimages = self._get_image_types()
image_cmds = []
for type in types:
cmds = []
subimages = []
localdata = bb.data.createCopy(self.d)
localdata.setVar('OVERRIDES', '%s:%s' % (type, old_overrides))
bb.data.update_data(localdata)
localdata.setVar('type', type)
cmds.append(localdata.expand("\tcd ${DEPLOY_DIR_IMAGE}"))
cmds.append("\t" + localdata.getVar("IMAGE_CMD", True))
if type in cimages:
for ctype in cimages[type]:
cmds.append("\t" + localdata.getVar("COMPRESS_CMD_" + ctype, True))
subimages.append(type + "." + ctype)
if type not in alltypes:
cmds.append(localdata.expand("\trm ${IMAGE_NAME}.rootfs.${type}"))
else:
subimages.append(type)
script_name = self._write_script(type, cmds)
image_cmds.append((type, subimages, script_name))
return image_cmds
def create(self):
bb.note("###### Generate images #######")
pre_process_cmds = self.d.getVar("IMAGE_PREPROCESS_COMMAND", True)
post_process_cmds = self.d.getVar("IMAGE_POSTPROCESS_COMMAND", True)
execute_pre_post_process(self.d, pre_process_cmds)
self._remove_old_symlinks()
image_cmds = self._get_imagecmds()
# create the images in parallel
nproc = multiprocessing.cpu_count()
pool = bb.utils.multiprocessingpool(nproc)
results = list(pool.imap(generate_image, image_cmds))
pool.close()
pool.join()
for result in results:
if result is not None:
bb.fatal(result)
for image_type, subimages, script in image_cmds:
bb.note("Creating symlinks for %s image ..." % image_type)
self._create_symlinks(subimages)
execute_pre_post_process(self.d, post_process_cmds)
def create_image(d):
Image(d).create()
if __name__ == "__main__":
"""
Image creation can be called independent from bitbake environment.
"""
"""
TBD
"""
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