classes: Update overlayfs classes to use new bitbake functionality

OverlayFS classes belong to a recipe scope

(From OE-Core rev: 7afa7739e82220729566ccabe2675a8991f9485a)

Signed-off-by: Vyacheslav Yurkov <v.yurkov@precitec.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 0 insertions, 137 deletions

diff --git a/meta/classes/overlayfs.bbclass b/meta/classes/overlayfs.bbclass
deleted file mode 100644
index bdc6dd9d57..0000000000
--- a/meta/classes/overlayfs.bbclass
+++ /dev/null
@@ -1,137 +0,0 @@
-#
-# Copyright OpenEmbedded Contributors
-#
-# SPDX-License-Identifier: MIT
-#
-
-# Class for generation of overlayfs mount units
-#
-# It's often desired in Embedded System design to have a read-only rootfs.
-# But a lot of different applications might want to have a read-write access to
-# some parts of a filesystem. It can be especially useful when your update mechanism
-# overwrites the whole rootfs, but you want your application data to be preserved
-# between updates. This class provides a way to achieve that by means
-# of overlayfs and at the same time keeping the base rootfs read-only.
-#
-# Usage example.
-#
-# Set a mount point for a partition overlayfs is going to use as upper layer
-# in your machine configuration. Underlying file system can be anything that
-# is supported by overlayfs. This has to be done in your machine configuration.
-# QA check fails to catch file existence if you redefine this variable in your recipe!
-#
-#   OVERLAYFS_MOUNT_POINT[data] ?= "/data"
-#
-# Per default the class assumes you have a corresponding fstab entry or systemd
-# mount unit (data.mount in this case) for this mount point installed on the
-# image, for instance via a wks script or the systemd-machine-units recipe.
-#
-# If the mount point is handled somewhere else, e.g. custom boot or preinit
-# scripts or in a initramfs, then this QA check can be skipped by adding
-# mount-configured to the related OVERLAYFS_QA_SKIP flag:
-#
-#   OVERLAYFS_QA_SKIP[data] = "mount-configured"
-#
-# To use the overlayfs, you just have to specify writable directories inside
-# their recipe:
-#
-#   OVERLAYFS_WRITABLE_PATHS[data] = "/usr/share/my-custom-application"
-#
-# To support several mount points you can use a different variable flag. Assume we
-# want to have a writable location on the file system, but not interested where the data
-# survive a reboot. Then we could have a mnt-overlay.mount unit for a tmpfs file system:
-#
-#   OVERLAYFS_MOUNT_POINT[mnt-overlay] = "/mnt/overlay"
-#   OVERLAYFS_WRITABLE_PATHS[mnt-overlay] = "/usr/share/another-application"
-#
-# If your recipe deploys a systemd service, then it should require and be
-# started after the ${PN}-overlays.service to make sure that all overlays are
-# mounted beforehand.
-#
-# Note: the class does not support /etc directory itself, because systemd depends on it
-# For /etc directory use overlayfs-etc class
-
-REQUIRED_DISTRO_FEATURES += "systemd overlayfs"
-
-inherit systemd features_check
-
-OVERLAYFS_CREATE_DIRS_TEMPLATE ??= "${COREBASE}/meta/files/overlayfs-create-dirs.service.in"
-OVERLAYFS_MOUNT_UNIT_TEMPLATE ??= "${COREBASE}/meta/files/overlayfs-unit.mount.in"
-OVERLAYFS_ALL_OVERLAYS_TEMPLATE ??= "${COREBASE}/meta/files/overlayfs-all-overlays.service.in"
-
-python do_create_overlayfs_units() {
-    from oe.overlayfs import mountUnitName
-
-    with open(d.getVar("OVERLAYFS_CREATE_DIRS_TEMPLATE"), "r") as f:
-        CreateDirsUnitTemplate = f.read()
-    with open(d.getVar("OVERLAYFS_MOUNT_UNIT_TEMPLATE"), "r") as f:
-        MountUnitTemplate = f.read()
-    with open(d.getVar("OVERLAYFS_ALL_OVERLAYS_TEMPLATE"), "r") as f:
-        AllOverlaysTemplate = f.read()
-
-    def prepareUnits(data, lower):
-        from oe.overlayfs import helperUnitName
-
-        args = {
-            'DATA_MOUNT_POINT': data,
-            'DATA_MOUNT_UNIT': mountUnitName(data),
-            'CREATE_DIRS_SERVICE': helperUnitName(lower),
-            'LOWERDIR': lower,
-        }
-
-        bb.debug(1, "Generate systemd unit %s" % mountUnitName(lower))
-        with open(os.path.join(d.getVar('WORKDIR'), mountUnitName(lower)), 'w') as f:
-            f.write(MountUnitTemplate.format(**args))
-
-        bb.debug(1, "Generate helper systemd unit %s" % helperUnitName(lower))
-        with open(os.path.join(d.getVar('WORKDIR'), helperUnitName(lower)), 'w') as f:
-            f.write(CreateDirsUnitTemplate.format(**args))
-
-    def prepareGlobalUnit(dependentUnits):
-        from oe.overlayfs import allOverlaysUnitName
-        args = {
-            'ALL_OVERLAYFS_UNITS': " ".join(dependentUnits),
-            'PN': d.getVar('PN')
-        }
-
-        bb.debug(1, "Generate systemd unit with all overlays %s" % allOverlaysUnitName(d))
-        with open(os.path.join(d.getVar('WORKDIR'), allOverlaysUnitName(d)), 'w') as f:
-            f.write(AllOverlaysTemplate.format(**args))
-
-    mountUnitList = []
-    overlayMountPoints = d.getVarFlags("OVERLAYFS_MOUNT_POINT")
-    for mountPoint in overlayMountPoints:
-        bb.debug(1, "Process variable flag %s" % mountPoint)
-        for lower in d.getVarFlag('OVERLAYFS_WRITABLE_PATHS', mountPoint).split():
-            bb.debug(1, "Prepare mount unit for %s with data mount point %s" %
-                     (lower, d.getVarFlag('OVERLAYFS_MOUNT_POINT', mountPoint)))
-            prepareUnits(d.getVarFlag('OVERLAYFS_MOUNT_POINT', mountPoint), lower)
-            mountUnitList.append(mountUnitName(lower))
-
-    # set up one unit, which depends on all mount units, so users can set
-    # only one dependency in their units to make sure software starts
-    # when all overlays are mounted
-    prepareGlobalUnit(mountUnitList)
-}
-
-# we need to generate file names early during parsing stage
-python () {
-    from oe.overlayfs import strForBash, unitFileList
-
-    unitList = unitFileList(d)
-    for unit in unitList:
-        d.appendVar('SYSTEMD_SERVICE:' + d.getVar('PN'), ' ' + unit)
-        d.appendVar('FILES:' + d.getVar('PN'), ' ' +
-                d.getVar('systemd_system_unitdir') + '/' + strForBash(unit))
-
-    d.setVar('OVERLAYFS_UNIT_LIST', ' '.join([strForBash(s) for s in unitList]))
-}
-
-do_install:append() {
-    install -d ${D}${systemd_system_unitdir}
-    for unit in ${OVERLAYFS_UNIT_LIST}; do
-        install -m 0444 ${WORKDIR}/${unit} ${D}${systemd_system_unitdir}
-    done
-}
-
-addtask create_overlayfs_units before do_install