Adds a list of locales user can choose from on init step.
If locale isn't default, then "lang" package is installed
and LANG is changed to the chosen locale.
Many of pmbootstrap's actions require root rights. When after requesting
sudo access pmbootstrap takes longer than the sudo timeout interval to finish
execution, the password will have to be entered again on the next sudo
action.
This change adds an opt-in feature to run sudo -v in a background loop
in order to prevent having to enter the password more than once for a single
pmbootstrap run. The loop runs as a daemon timer which automatically gets
canceled when pmbootstrap exits.
Closes: #1677
Replace the "kill_as_root" argument with a much simpler "sudo" argument
and remove the now obsolete check for the output mode of "kill_as_root".
"kill_as_root" would only get set to True if both conditions are met:
a) command is running with sudo
b) command is running with an output mode ("log" or "stdout") where
pmb.helpers.run_core would kill it if it does not output anything
before a timeout is reached
The new "sudo" argument just indicates if the command is running with
sudo (a), regardless of the output mode (b).
The sideload command runs the supplied names through the pmbootstrap
buildsystem to make sure they're up-to-date, then uses scp from the host
to copy the built apks to /tmp on the phone and installs them through
ssh.
If the --install-key option is set then it will also copy over the apk
key that's used for signing the packages built by pmbootstrap in case
the postmarketOS install on the device isn't build by the same machine
as you're sideloading from.
Before this commit, pmb.helpers.run_core.sanity_checks would raise
a runtime error when pmb.helpers.run.root was called with an output
mode that did not support timeouts (like background).
Adds checks for following kernel config options:
SAMSUNG_TUI:
TUI HW Handler - related to Samsung's security measures
Creates "secure frame buffer", results in bootloop
SEC_RESTRICT_ROOTING:
blocks gaining root permissions
TZDEV:
Samsung TZ Based Secure OS interface driver
(results in bootloops)
This adds a new commandline flag -E / --extra-space for
specifying the amount of additional space to be added to
the image size to work around cases where the automatically
determined size turns out to not actually be enough.
The value is also asked for in the "Additional options"
section of the interactive mode.
Fixes: #1904
Use the dtb-appended kernel file, e.g. postmarketos-exynos4-dtb instead
of postmarketos-exynos4, if it is available. This is needed to flash a
mainline kernel with appended dtb to isorec devices.
Use a deterministic mirror URL instead of CDN for aportgen. Otherwise we
may generate a pmaport that wraps an apk from Alpine (e.g. musl-armv7)
locally with one up-to-date mirror given by the CDN. But then the build
will fail if CDN picks an outdated mirror for CI or BPO.
Some Mediatek devices have a special 512-byte header around the zImage
which must be generated so the device boots.
Support for that exists for a while in postmarketOS but detection was
missing. Add that.
Replace dl-cdn mirror with dl-2 temporarily to avoid "BAD signature"
errors.
This is related to the rebuild of Alpine edge x86, armhf, armv7 packages
against musl-1.2, that is currently going on. The packages are rebuilt
without a version change and therefore have the same resulting file
name, but a different checksum. Due to caching of the CDN and due to the
same file name, users may get an old package from before the rebuild.
The APKINDEX has a checksum of the new package, and so the download will
fail with a "BAD signature" error.
Alpine developers clear the cache every now and then, but this issue
will happen over and over again, until all packages are rebuilt (some
packages are still not rebuilt and have been disabled).
Let's switch back in two months or so.
Let UI meta-packages specify apps in "pmb_recommends" to be explicitly
installed by default, and not implicitly as dependency of the UI
meta-package ("depends"). Therefore make these apps uninstallable,
without removing the meta-package.
Add pmbootstrap install --no-recommends to disable this feature.
Add a question at the end of "pmbootstrap init", to ask if the user
wants to build outdated packages during "pmbootstrap install". Store the
result in the new pmbootstrap.cfg key "build_pkgs_on_install". I've put it at
the end, because it is a rather complicated question compared to the rest.
This is useful to speed up the installation for casual users who can now
avoid compiling packages. But also for the official images where we only
want to ship the official binary packages and not build anything
on-the-fly.
Put a minimum version check for postmarketos-ondev in the pmbootstrap
install code and verify it before starting the installation. This avoids
using incompatible versions, similar to the pmaports.cfg version check
we already have. Set the minimum required version to 0.2.0.
"Chassis" defines the what kind of device a device is. Currently the
following standardized types exist:
"desktop", "laptop", "convertible", "server", "tablet", "handset",
"watch", "embedded", "vm", "container"
This property is exposed by org.freedesktop.hostname1 (e.g.
openrc-settingsd) and can be used by applications for example to display
appropriate strings instead of "About this phone" for non-phone devices.
Migrate to workdir version 5 and move already built packages into the edge
channel subdir, for example:
$WORK/packages/x86_64/hello-world-1-r5.apk
to:
$WORK/packages/edge/x86_64/hello-world-1-r5.apk
The build.postmarketos.org code has already been adjusted to find built
packages in either directory structure.
Use mirrordir_pmos and mirrordir_alpine from channels.cfg to generate
the mirror URLs for postmarketOS and Alpine, which get written to
/etc/apk/repositories and which postmarketOS uses to download the
APKINDEX files.
Remove hardcoded "master" at the end of the postmarketOS mirror and use
mirrordir_pmos instead (which is "master" for the edge channel). Let the
postmarketOS mirror end in a '/' for consistency with the Alpine mirror
in pmb/config/__init__.py.
Remove obsolete --alpine-version. To experiment with a different Alpine
version, one should pass a custom --config-channels from now on.
Ask for release channel and switch pmaports branch to the related branch
defined in channels.cfg.
Store in pmbootstrap.cfg whether the user chose a channel (boolean). If
the user did not choose a channel yet, suggest the recommended channel
from channels.cfg (currently "edge").
New pmaports.cfg has the "channel" key described in [1]. This will be
used in "pmbootstrap init" to determine on which release channel a
forked branch is.
[1] https://postmarketos.org/pmaports.cfg
Let apkbuild-lint check options again, and pass the pmbootstrap specific
options with the new CUSTOM_VALID_OPTIONS variable. Add a test case and
adjust pmb.helpers.lint.check to return the output of apkbuild-lint, so
we can properly test it.
Related: https://gitlab.alpinelinux.org/Leo/atools/-/merge_requests/28
Fixes: pmaports#553
At the moment we set samsung-i9100 as default device.
This is probably only for historical reasons.
For someone/something using pmbootstrap without a specific device in mind
(e.g. CI) it's really better to use a generic device. QEMU runs natively
in a virtual machine so everyone can use it for testing.
Flashes device vbmeta partition (can be overriden with
"flash_fastboot_partition_vbmeta" setting in deviceinfo)
with custom vbmeta.img which has verity flag disabled,
so device can boot postmarketOS with no problems.
Use the timestamp of .git/FETCH_HEAD in each git repository, to
determine if too much time has passed since the last fetch/pull.
Modify pmb.helpers.git.clone, so FETCH_HEAD is always created if it does
not exist (because "git clone" would not create it).
Related: #1829
In the future, device ports will be located in a subdirectory
below device/... (e.g. device/testing/device-...).
Replace all occurrences of device/* with a glob that checks the
subdirectories instead.
Note: To ensure that this always works properly we should also add some
checks that all devices are indeed located under one of the supported
subdirectories (i.e. testing/community/main).
Change the glob for pmaports to <aports>/**/APKBUILD.
This allows using subdirectories for organization outside of device/
as well.
mesa-dri-swrast and mesa-dri-virtio are both provided by mesa-dri-gallium
now, so this option does not have much use anymore. With both selections,
exactly the same packages are installed.
Whenever initializing new chroots, save the date in $WORK/workdir.cfg.
Add pmb.config.workdir.chroots_outdated() to check if it's time to zap
the chroots or not (since we don't update them automatically). Mark them
as outdated after two days.
This will be the first check in "pmbootstrap status" (future patches).
Related: #1829
While at it, also remove unnecessary "#!/usr/bin/env python3" in files
that only get imported, and adjust other empty/comment lines in the
beginnings of the files for consistency.
This makes files easier to read, and makes the pmbootstrap codebase more
consistent with the build.postmarketos.org codebase.
At the moment we have a simple subpkgdesc() function that can only
parse "pkgdesc" from subpackages, without support for any variables.
But we have a quite nice variable parser now that can be extended
to work for subpackages.
Simply put this works by:
- Finding the lines that belong to the subpackage function
- Stripping indentation (tab)
- Parsing relevant attributes similar to the apkbuild() function
The "subpackages" in the parsed APKBUILD are replaced by a dict
of subpkgname: {"pkgdesc": "...", "depends": "..."} which are
parsed from the subpackage function (if found).
This makes it possible to get the "depends" of a subpackage.
The gist of this action is upgrading the specified aport to the latest
version. There are implementations for both stable packages (which check
via the release-monitoring.org API for new versions) and git packages
(which check the GitLab/GitHub API for new commits on the main branch).
There's also the possibility to pass --all, --all-stable & --all-git to
the action which either loops through all packages, or just stable or
git packages and upgrades them.
The --dry argument is also respected.
Note, that the implementation does update the variables pkgver, pkgrel
and _commit but it doesn't update the checksums because that would slow
down the process a lot, and is potentially undesirable.
asus-me176c has a Fastboot interface that can be used for flashing,
but in postmarketOS we do not use Android boot images for it.
This is because is it not very practical - the boot partition is
quite small and there is a (custom) EFI bootloader that can boot
directly from any other FAT32 partition.
At the moment the installation process is manual:
1. pmbootstrap install --split to have separated boot (FAT32)
and rootfs images
2. pmbootstrap export
3. Flash boot and rootfs images manually using Fastboot
The "fastboot-bootpart" flasher implements that process in a more
convenient way. When a device uses the "fastboot-bootpart" flasher:
- We generate --split images on "pmbootstrap install" by default.
(This can be disabled using --no-split instead.)
- pmbootstrap flasher flash_kernel flashes the raw boot partition
(not an Android boot image) using Fastboot, just like the rootfs.
There are some limitations that could be improved in the future:
- "fastboot-bootpart" is not offered in the device wizard.
I think it is special enough that no-one will be starting with it,
and the difference to normal "fastboot" might be confusing.
- Support "pmbootstrap flasher boot". asus-me176c does not support
"fastboot boot" properly, but theoretically we could still generate
Android boot images to use when booting an image directly.
- At the moment the boot partition image is not regenerated when
using "pmbootstrap flasher flash_kernel" (unlike when using Android
boot images). "pmbootstrap install" needs to be run manually first.
Right now we explicitly add ttf-droid to /etc/apk/world, and force
installation of it on every postmarketOS installation. But there really
is no reason to force this from pmbootstrap:
- If ttf-droid is really required for every postmarketOS installation,
it should be a depends of postmarketos-base.
- Even with this change it is still installed on every device,
because postmarketos-splash depends on it.
- There is no need for fonts when using the "none" UI.
For now, the only difference of this change is that we no longer add
ttf-droid explicitly to the APK world. Instead, it is installed as
dependency of postmarketos-splash.
Rust packaging is new and still a bit weird in Alpine and postmarketOS.
As of writing, we only have one package (squeekboard), and use cargo to
download the source of all dependencies at build time (several git
repositories!) and compile it. Usually, this is a no-go, but at least
until this is resolved properly, let's cache the downloads as suggested
in: https://doc.rust-lang.org/cargo/guide/cargo-home.html
Related: #1861
Do not install git in the native chroot and use it from there. Remove the
chown_to_user argument from pmb.helpers.git.clone(), the resulting dir
is now always owned by the user. While at it, refactor the function and
display the clone URL.
Previously we had cloned aports_upstream (from Alpine) with
chown_to_user=False (legacy) and pmaports with chown_to_user=True.
pmb.helpers.git.rev_parse() would only work after chown_to_user=True.
Check if git is installed in "pmbootstrap init", and remove the same
check from rev_parse(). Add a new work dir version, that checks for git
and changes ownership of already checked out aports_upstream to the
host system's user.
When creating a new work dir, create cache_git instead of cache_http.
cache_http is created on demand already, with proper permissions. But
cache_git must be created, otherwise pmb.helpers.mount.bind will create it
as root.
This is in preparation for the "pmbootstrap pull" feature, as it allows
using the host system's git in all new code paths. We will be able to
handle repositories even if they were cloned outside of the work dir
(which we do in a few CI scripts for example).
Related: #1858
Remove /home/pmos/git from pmb.config.chroot_home_symlinks, so
pmb.chroot.init.init() will not change the ownership of the
$WORK/cache_git dir.
The symlink was added two years ago in [1] as compatibility to previous
behavior, because the mountpoint of cache_git was changed from
/home/user/git to /mnt/pmbootstrap-git. Forcing the ownership of that
dir to be the pmos user inside the chroot made sense, because the only
cloned repository (aports_upstream) would also be owned by the pmos
user. With the upcoming change to have all cloned repos owned by the
host-system's user, this is just confusing.
The /home/pmos/git symlink does not seem to be used by anybody, it is
not mentioned in the pmbootstrap code and in the wiki.
[1] b4dd7a89 "Close #709: Improve user creation (#725)"
https://github.com/postmarketOS/pmbootstrap/pull/725
Add default user to netdev group. Together with MR [1] in pmaports.git,
this fixes the permissions to use nmtui and nm-applet from the user.
[1] https://gitlab.com/postmarketOS/pmaports/merge_requests/777
Signed-off-by: Danct12 <danct12@disroot.org>
Always install git when building packages, so abuild won't behave
slightly different if it is (not) installed. As nice side-effect, we
will always get the pmaports.git commit saved in the resulting .apk file
from now on (in .PKGINFO).
elogind requires cgroup support in the kernel.
It does not start without it, resulting into errors like:
elogind-daemon[1654]: Failed to mount tmpfs at /sys/fs/cgroup: No such file or directory
elogind-daemon[1654]: Failed to mount cgroup at /sys/fs/cgroup/elogind: No such file or directory
elogind-daemon[1654]: Failed to allocate manager object: No such file or directory
dbus-daemon[1437]: [system] Activating service name='org.freedesktop.login1' requested by ':1.1' (uid=0 pid=1642 comm="/usr/bin/lightdm ") (using servicehelper)
dbus-daemon[1437]: [system] Failed to activate service 'org.freedesktop.login1': timed out (service_start_timeout=25000ms)
Most of the supported desktop environments (e.g. Weston) do not
start without elogind, so we should require CONFIG_CGROUPS=y in
all kernels to avoid this problem.
postmarketOS/pmaports!700 adds a new "deviceinfo_bootimg_dtb_second"
option that places the DTB in the "second" area of the Android boot
image.
Attempt to detect this automatically by checking the extracted
second binary for the FDT magic (0xd00dfeed).
This reverts commit 6fb5b28e2f.
The -i option was removed from fastboot, so we can't use it anymore
unless we fork the package. There was only one device using it,
amazon-thor. I will add a note to the wiki page.
Fixes#1830.
Make sure, that "args.fork_alpine" is always present. Otherwise,
pmbootstrap will fail if the aportgen code is called by anything but
"pmbootstrap aportgen". For example, when the user is adding a new
device during "pmbootstrap init".
Fixes: 54e51759ad ("aportgen: add feature to fork upstream packages")
Remove u-boot from the native_cross_compile list as we now have
crossdirect. Compiling is not terribly slow anymore, and when not using
the "native" method, it is possible to depend on firmware packages like
arm-trusted-firmware-sun50i.
This reverts commit d7d7ccb672.
Add check for UEVENT_HELPER for kernels >= 4.0.0. Change LBDAF check to
be only required for kernels <5.2.0. Adjust the config format and
checking code to support such range specific checks.
Depend on new pmaports version, where crossdirect uses the native ccache
binary instead of going through the foreign arch ccache first and then
going through crossdirect.
Old:
ccache (foreign) -> crossdirect (native) -> gcc (native)
New:
crossdirect (native) -> ccache (native) -> gcc (native)
Set the PATH to the crossdirect binaries, and don't set CCACHE_PATH or
CCACHE_COMPILERCHECK from pmbootstrap anymore. crossdirect sets the
CCACHE_PATH to /native/usr/bin now, along with all other required
environment variables. CCACHE_COMPILERCHECK isn't necessary anymore,
because ccache will call gcc directly and therefore be able to use the
file's timestamp and size directly. Also passing that would not work
with the current crossdirect package.
Launch native cross compilers inside foreign chroot. Enable by default,
but allow disabling with --no-crossdirect for now. This option and the
distcc-sshd related code will be removed in the future.
This adds flasher support for uuu, a utility used by NXP devices for
flashing images.
The flasher expects a uuu command list script to be installed in the
device rootfs at /usr/share/uuu/flash_script.lst.
This allows building u-boot much faster, previously it used to build
whole u-boot with distcc+qemu cross-compile, now it builds u-boot on
native chroot using cross-compilers.
Related to a proprietary "T-Mobile's WiFi-Calling" feature. It should
not affect normal calls, so it should be safe to disable it. Having it
enabled causes sudo, ip and other commands to hang.
It is dangerous to flash the boot partition on the Ouya. Doing so can
result in a bricked device. Allow deviceinfo to blacklist partitions from
ever being flashed.
Increase pakage version and minimum required apk version. The latter
should be done with every new release from now on, so we always have a
recent version there. I've updated the pmbootstrep release checklist
accordingly: https://wiki.postmarketos.org/wiki/Pmbootstrap_release
Allow changing the kernel partition for fastboot and heimdall in
deviceinfo and on the fly while doing "pmbootstrap flasher
flash_kernel". Also allow changing the partition for
"... flash_rootfs" with fastboot (this was only possible with
heimdall so far).
Introduce two new deviceinfo variables:
* flash_fastboot_partition_kernel
* flash_fastboot_partition_system
This is useful for devices with dual partitioning that have boot_a
and boot_b.
This allows embedding multiple firmware binaries into SD images.
Firmware images for most devices that require this functionality consist
mainly of u-boot, but some devices (e.g. librem5) have multiple firmware
images that need to be embedded in the SD image created by pmbootstrap.
This functionality uses two new deviceinfo parameters:
- deviceinfo_sd_embed_firmware: a comma-separated list of
binary:offset (where binary is under /usr/share/firmware)
- deviceinfo_sd_embed_firmware_step_size: The number of bytes for
each increment of the offset specified in the
deviceinfo_sd_embed_firmware (typically 1024 or 2048)
deviceinfo_write_uboot_spl has been obsoleted by these new parameters.
deviceinfo_codneame holds the device's code name, so we can easily look
it up in the finished postmarketOS installation by reading
/etc/deviceinfo.
Related: postmarketOS/pmaports#157
Make it possible to point the pmaports dir to an existing repository
clone, while not having to give the --aports/-p parameter with every
command.
pmbootstrap --aports=/my/pmaports/path init
If the config file exists already, the dir can also be set with:
pmbootstrap config aports /my/pmaports/path
Adds an optional deviceinfo variable, `deviceinfo_rootfs_image_sector_size`,
which specifies the logical sector size of the device's storage.
Some devices made after 2016 with UFS storage uses 4096 byte sectors
instead of the normal 512 bytes. The partition table in our rootfs
must match, otherwise the root filesystem won't mount on the device.
This change passes the sector size to `losetup` when creating the image
if the deviceinfo specifies it, so the image will have the correct
sector size.
If the deviceinfo doesn't specify the new option, the behaviour
is the same as previous versions of pmbootstrap.
Note that the sector size option only works on Linux 4.14 and above,
so pmbootstrap should be run on a >4.14 computer when installing to
devices with non-standard sector size.
To find if a device needs this parameter, run `fdisk -l` on the device.
If the output shows
`Note: sector size is 4096 (not 512)`
then add `deviceinfo_rootfs_image_sector_size="4096"` to the deviceinfo.
This is needed by the Pixel 3 XL (google-crosshatch) port.
See https://gitlab.com/postmarketOS/pmbootstrap/issues/1696.
Weston and Plasma Mobile might choose to draw on this virtual frame
buffer, just like it happened for the samsung-jflte. Disabling the
USE_VFB option fixed this, so let's make sure we don't have that option
enabled for any kernel.
Multiple -mp arguments can be used to list multiple mirrors:
$ pmbootstrap -mp=first -mp=second chroot -- cat /etc/apk/repositories
This is needed for the new build infrastructure, so we can have a WIP
repository to which we push packages until all of them are up to date,
and then publish all of them at once. Software like KDE/Plasma Mobile,
which expect a lot of packages to be updated from one version to
another will not end up with a half-way through upgrade that way.
This commit adds a test case, which makes sure that the KDE framework
and plasma framework version are always the same.
Additional changes:
* APKBUILD parser parses the URL now (that's the best way I found to
categorize the KDE aports in frameworks and other)
* Changed single quotes to double quotes in KDE APKBUILDs, so the
parser doesn't include the single quotes in the parsed result
* Added the test case to the gitlab CI config
Follow-up to !1373, where `pmbootstrap flasher flash_system` was
replaced with `pmbootstrap flasher flash_rootfs`. We still had used
terms like "system partition" in a lot of places.
This commit replaces it everywhere, so it's clear that we're talking
about the pmOS rootfs (which may or may not be installed to Android's
system partition).
* Travis and Coveralls badges
* aports: instead of <https://github.com/postmarketOS>, use
<https://postmarketos.org>
* References to full URLs to issues and pull requests replaced with
a hash and the number
* grsec check: simplify error message, remove link to github issue
(nobody is using that anymore anyway)
This allows the user to talk to networkmanager to manage the system
connections. As it is mentioned in networkmanager pre-install.
```
Executing networkmanager-1.10.6-r0.pre-install
*
* To setup system connections, regular users must be member of 'plugdev' group.
```
The plugdev group gets created in the post-install hook of
networkmanager. Not all UIs depend on networkmanager, which means that
the group may not exist at installation time when we try to add the
user to the group in the python code. Therefore we create the group
first.
It is important, that we have DEVTMPFS enabled in the kernel config. But
it does not hurt to have DEVTMPFS_MOUNT enabled as well, and some of
Alpine's kernel configs have that by default. This commit removes the
check that forbids the option in kernel configs, so we can fork the
raspberry pi kernel package from Alpine without changing unrelated
options.
Device nodes in the chroots get created in a tmpfs, so they can be
created even if the filesystem where the chroot resides does not
support device nodes (#1317). In "pmbootstrap shutdown" we umount the
`dev` folder, which means all device nodes that were created inside
this folder are gone. This commit changes the code to actually recreate
the device nodes when using the chroot again.
Details:
* move `pmb.chroot.init.create_device_nodes` to
`pmb.chroot.mount.crete_device_nodes`
* don't call it in `pmb.chroot.init()` anymore, but in
`pmb.chroot.mount_dev_tmpfs()`
* Create the `null` device as well (`apk --initdb` also creates it on
`init`, but we don't call it after `shutdown`)
The postmarketos-base package used to make the user part of the "video"
and "audio" groups. However, this did not work reliably, and we were
adding the "wheel" group in "pmbootstrap install" anyway.
Now all groups get added in "pmbootstrap install", and the names of the
groups have been moved to `pmb.config.install_user_groups`.
* As discussed in IRC/matrix, we're removing `linux-postmarketos-lts`
for now. The kernel isn't used right now, and we save lots of
maintenance effort with not updating it every week or so.
* new config option `"kernel"` with possible values:
`"downstream", "mainline", "stable"` (downstream is always
`linux-$devicename`)
* ask for the kernel during `pmbootstrap init` if the device package
has kernel subpackages and install it in `_install.py`
* postmarketos-mkinitfs: display note instead of exit with error when
the `deviceinfo_dtb` file is missing (because we expect it to be
missing for downstream kernels)
* device-sony-amami:
* add kernel subpackages for downstream, mainline
* set `deviceinfo_dtb`
* device-qemu-amd64: add kernel subpackages for stable, lts, mainline
* test cases and test data for new functions
* test case that checks all aports for right usage of the feature:
* don't mix specifying kernels in depends *and* subpackages
* 1 kernel in depends is maximum
* kernel subpackages must have a valid name
* Test if devices packages reference at least one kernel
* Remove `_build_device_depends_note()` which informs the user that
`--ignore-depends` can be used with device packages to avoid building
the kernel. The idea was to make the transition easier after a change
we did months ago, and now the kernel doesn't always get built before
building the device package so it's not relevant anymore.
* pmb/chroot/other.py:
* Add autoinstall=True to kernel_flavors_installed(). When the flag
is set, the function makes sure that at least one kernel for the
device is installed.
* Remove kernel_flavor_autodetect() function, wherever it was used,
it has been replaced with kernel_flavors_installed()[0].
* pmb.helpers.frontend.py: remove code to install at least one kernel,
kernel_flavors_installed() takes care of that now.
As noted in commit 255c715624
`/var/cache/distfiles` is writable by everyone. It is supposed to be
writable only by `root` and by the `abuild` group (in which we put the
`pmos` user already for building packages).
Changes:
* `pmb.build.init()`: make `/var/cache/distfiles` writable only by
members of the `abuild` group (and root)
* Increase workfolder version to 2
* Add migration code that fixes the permissions for existing work
folders
* Refactor the migration code a bit to make this possible
* Change `pmbootstrap flasher flash_system` command to
`pmbootstrap flasher flash_rootfs`
* The old command still works, but all references have been changed to
the new command
* Remove obsolete `pmbootstrap flasher export` (that was changed to
`pmbootstrap export` a few months ago)
* Update `README.md` and ZSH auto completion
* Change the description of the generated rootfs image (not talking
about a system image anymore, mention that it has subpartitions)
* Better description of `pmbootstrap flasher flash_rootfs --partition`
* Save "" (empty string) in the user's config as hostname if the user
let it default to the name of the device. That way, when the device
gets changed, the user won't get the old device's name as hostname
by accident.
* Add a test case