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authorRichard Purdie <richard.purdie@linuxfoundation.org>2025-11-07 13:31:53 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2025-11-07 13:31:53 +0000
commit8c22ff0d8b70d9b12f0487ef696a7e915b9e3173 (patch)
treeefdc32587159d0050a69009bdf2330a531727d95 /meta/classes-recipe/fs-uuid.bbclass
parentd412d2747595c1cc4a5e3ca975e3adc31b2f7891 (diff)
downloadpoky-8c22ff0d8b70d9b12f0487ef696a7e915b9e3173.tar.gz
The poky repository master branch is no longer being updated.
You can either: a) switch to individual clones of bitbake, openembedded-core, meta-yocto and yocto-docs b) use the new bitbake-setup You can find information about either approach in our documentation: https://docs.yoctoproject.org/ Note that "poky" the distro setting is still available in meta-yocto as before and we continue to use and maintain that. Long live Poky! Some further information on the background of this change can be found in: https://lists.openembedded.org/g/openembedded-architecture/message/2179 Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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diff --git a/meta/classes-recipe/fs-uuid.bbclass b/meta/classes-recipe/fs-uuid.bbclass
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1#
2# Copyright OpenEmbedded Contributors
3#
4# SPDX-License-Identifier: MIT
5#
6
7# Extract UUID from ${ROOTFS}, which must have been built
8# by the time that this function gets called. Only works
9# on ext file systems and depends on tune2fs.
10def get_rootfs_uuid(d):
11 import subprocess
12 rootfs = d.getVar('ROOTFS')
13 output = subprocess.check_output(['tune2fs', '-l', rootfs], text=True)
14 for line in output.split('\n'):
15 if line.startswith('Filesystem UUID:'):
16 uuid = line.split()[-1]
17 bb.note('UUID of %s: %s' % (rootfs, uuid))
18 return uuid
19 bb.fatal('Could not determine filesystem UUID of %s' % rootfs)
20
21# Replace the special <<uuid-of-rootfs>> inside a string (like the
22# root= APPEND string in a syslinux.cfg or systemd-boot entry) with the
23# actual UUID of the rootfs. Does nothing if the special string
24# is not used.
25def replace_rootfs_uuid(d, string):
26 UUID_PLACEHOLDER = '<<uuid-of-rootfs>>'
27 if UUID_PLACEHOLDER in string:
28 uuid = get_rootfs_uuid(d)
29 string = string.replace(UUID_PLACEHOLDER, uuid)
30 return string