Provide a NixOS module for the [built-in Anki Sync
Server](https://docs.ankiweb.net/sync-server.html) included in recent
versions of Anki. This supersedes the `ankisyncd` module, but we should
keep that for now because `ankisyncd` supports older versions of Anki
clients than this module.
SnapRAID has a feature where you can specify "split" parity files. This
is useful when you're using 16tb or bigger ext4-formatted disks for
parity. ext4 doesn't support files bigger than 16tb so this "split
parity file" can be used to specify two parity files on a single parity
disk and SnapRAID will automatically use the subsequent file when the current
cannot grow anymore (hits 16TB). You specify these split parity files by
separating them with commas in the "parity" config option. This
mostly already works except when it comes to the scheduled systemd sync
job where it specifies ReadWritePaths. If you specify a parity with
multiple files you'll get an error when the systemd job runs: Failed to
set up mount namespacing:
/run/systemd/unit-root/mnt/parity1/snapraid1.parity,/mnt/parity1/snapraid2.parity: No such file or directory
Essentially, when the parity file paths are passed into ReadWritePaths,
they're always treated as a single path. This change makes sure to
split the paths if they contain a comma.
The big concern for this change is if it would break users who have
commas in their actual parity file paths. This won't be an issue because SnapRAID
itself blindly splits on commas for parity files, so legitimate commas in a parity
file path wouldn't work in SnapRAID anyway. See here:
978d812153/cmdline/state.c (L692)
SnapRAID doc for split parity files: https://www.snapraid.it/manual#7.1
NixOS releases are also `lib` releases :)
The release notes were collected from looking at the `git diff` since
22.11.
Since the NixOS and Nixpkgs manuals are rendered separately, I'm linking
to the "unstable" link to make sure the links definitely work on the time of
release. The "stable" link might take some time to become available
The Nixpkgs documentation on the linux kernel builders focused on
using and extending kernels that were already packaged, but never
mentioned that it's possible to also build a kernel almost "from
scratch".
The NixOS documentation went a bit deeper on manual linux kernel
configs, but that information wasn't particularly NixOS-specific.
This commit consolidates the information related to building the
kernel on Nixpkgs's documentation, while keeping any additional
NixOS-specific information on NixOS's documentation.
An additional README.md was created for contributor-facing
documentation.
