artif: new Btrfs artifacts

[mnrkbys]

Add new artifacts to collect information of Btrfs subvolumes.

[mnrkbys]

I don't know why the validation failed.
The verification succeeds in my environment.

> ./uac --validate-artifact artifacts/live_response/storage/btrfs.yaml 
Validating artifact artifacts/live_response/storage/btrfs.yaml
uac: artifact successfully validated.

However, I have noticed that if the newline code is CRLF, the validation fails.
(/mnt/hgfs/git_root/forked/uac/artifacts/live_response/storage/btrfs.yaml is located on VMware workstation host (Windows).)

> ./uac --validate-artifact /mnt/hgfs/git_root/forked/uac/artifacts/live_response/storage/btrfs.yaml 
Validating artifact /mnt/hgfs/git_root/forked/uac/artifacts/live_response/storage/btrfs.yaml
'.c: artifact: invalid property 'artifacts:

artifacts/live_response/storage/btrfs.yaml

> hexdump -C artifacts/live_response/storage/btrfs.yaml | head
00000000  76 65 72 73 69 6f 6e 3a  20 31 2e 30 0a 63 6f 6e  |version: 1.0.con|
00000010  64 69 74 69 6f 6e 3a 20  63 6f 6d 6d 61 6e 64 5f  |dition: command_|
00000020  65 78 69 73 74 73 20 22  62 74 72 66 73 22 0a 6f  |exists "btrfs".o|
00000030  75 74 70 75 74 5f 64 69  72 65 63 74 6f 72 79 3a  |utput_directory:|
00000040  20 2f 6c 69 76 65 5f 72  65 73 70 6f 6e 73 65 2f  | /live_response/|
00000050  73 74 6f 72 61 67 65 0a  61 72 74 69 66 61 63 74  |storage.artifact|
00000060  73 3a 0a 20 20 2d 0a 20  20 20 20 64 65 73 63 72  |s:.  -.    descr|
00000070  69 70 74 69 6f 6e 3a 20  43 6f 6c 6c 65 63 74 20  |iption: Collect |
00000080  74 68 65 20 6c 69 73 74  20 6f 66 20 61 6c 6c 20  |the list of all |
00000090  42 74 72 66 73 20 6d 6f  75 6e 74 70 6f 69 6e 74  |Btrfs mountpoint|

/mnt/hgfs/git_root/forked/uac/artifacts/live_response/storage/btrfs.yaml

> hexdump -C /mnt/hgfs/git_root/forked/uac/artifacts/live_response/storage/btrfs.yaml | head
00000000  76 65 72 73 69 6f 6e 3a  20 31 2e 30 0d 0a 63 6f  |version: 1.0..co|
00000010  6e 64 69 74 69 6f 6e 3a  20 63 6f 6d 6d 61 6e 64  |ndition: command|
00000020  5f 65 78 69 73 74 73 20  22 62 74 72 66 73 22 0d  |_exists "btrfs".|
00000030  0a 6f 75 74 70 75 74 5f  64 69 72 65 63 74 6f 72  |.output_director|
00000040  79 3a 20 2f 6c 69 76 65  5f 72 65 73 70 6f 6e 73  |y: /live_respons|
00000050  65 2f 73 74 6f 72 61 67  65 0d 0a 61 72 74 69 66  |e/storage..artif|
00000060  61 63 74 73 3a 0d 0a 20  20 2d 0d 0a 20 20 20 20  |acts:..  -..    |
00000070  64 65 73 63 72 69 70 74  69 6f 6e 3a 20 43 6f 6c  |description: Col|
00000080  6c 65 63 74 20 74 68 65  20 6c 69 73 74 20 6f 66  |lect the list of|
00000090  20 61 6c 6c 20 42 74 72  66 73 20 6d 6f 75 6e 74  | all Btrfs mount|

Do line feed codes affect validation?

[tclahr]

Why is the second from the last commented?

[mnrkbys]

The commented out artifact is a forget to delete.
Initially I was considering using the “btrfs subvolume show” command to output information on all Btrfs subvolumes.
The commented out artifact did not work well in the openSUSE environment, so I changed it to process only the Btrfs of the mount point.