Remarks on reporting

[qkaiser]

Some remarks about the reporting content and how it's displayed on the console:

$ nix run github:onekey-sec/unblob/a5536446208f749c9df77f3d5a07528933e9e418 -- $( nix build --no-link --print-out-paths github:srid/nixos-config/1a6879bbd1c0f87f67533a7b91bc438e042b3bf6#nixosConfigurations.actual.config.system.build.initialRamdisk )/initrd
╭──────────────── unblob (23.8.11) ────────────────╮
│ Extracted files: 5                               │{{1}}
│ Extracted directories: 12                        │{{2}}
│ Extracted links: 5                               │
│ Extraction directory size: 50.82 MB              │
│ Chunks identification ratio: 99.99%              │
╰──────────────────── Summary ─────────────────────╯
            Chunks distribution
┏━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━┳━━━━━━━━┓
┃ Chunk type          ┃   Size   ┃ Ratio  ┃
┡━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━╇━━━━━━━━┩
│ CPIO_PORTABLE_ASCII │ 32.64 MB │ 74.42% │{{3}}
│ ZSTD                │ 11.21 MB │ 25.57% │{{3}}
│ UNKNOWN             │ 5.50 KB  │ 0.01%  │
└─────────────────────┴──────────┴────────┘
       Encountered errors
┏━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┓
┃ Severity       ┃ Name         ┃
┡━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━┩
│ Severity.ERROR │ UnknownError │{{4}}
└────────────────┴──────────────┘
$ ech0 $?
1
$ tree -sF initrd_extract/
initrd_extract/
|-- [          3]  0-7279104.cpio_portable_ascii_extract/
|   `-- [          3]  kernel/
|       `-- [          3]  x86/
|           `-- [          3]  microcode/
|               `-- [    7278592]  GenuineIntel.bin {{1}}
|-- [       1536]  7279104-7280640.unknown {{1}}
`-- [          4]  7280640-19039435.zstd_extract/
    |-- [   26951680]  zstd.uncompressed {{5}}
    `-- [          5]  zstd.uncompressed_extract/
        |-- [   26947584]  0-26947584.cpio_portable_ascii
        |-- [          6]  0-26947584.cpio_portable_ascii_extract/
        |   |-- [          2]  dev/
        |   |-- [          4]  etc/
        |   |   |-- [         56]  mdadm.conf -> ../nix/store/ivzdqwmjb3g5cddb0l3kakqpym53n4sk-mdadm.conf
        |   |   `-- [          5]  modprobe.d/
        |   |       |-- [         80]  debian.conf -> ../../nix/store/1hvskwda7r1spasqqg4ascjngqpnp0qw-kmod-debian-aliases.conf-22-1.1
        |   |       |-- [         74]  nixos.conf -> ../../nix/store/fg1iypr8qlc4li832bsnqsv2182wjkmb-etc-modprobe.d-nixos.conf
        |   |       `-- [         77]  ubuntu.conf -> ../../nix/store/pyzxg3hb6r88l7bqfya22q002sbchfxi-initrd-kmod-blacklist-ubuntu
        |   |-- [         58]  init -> nix/store/320svbpp3f9mhdc4xr0p1n2gm3nfwzv1-stage-1-init.sh
        |   `-- [          3]  nix/
        |       `-- [          5]  store/
        |           |-- [        655]  1hvskwda7r1spasqqg4ascjngqpnp0qw-kmod-debian-aliases.conf-22-1.1 {{1}}
        |           |-- [      20667]  320svbpp3f9mhdc4xr0p1n2gm3nfwzv1-stage-1-init.sh {{1}}
        |           `-- [          2]  5cxd4ywn7sis9h5yibxfc6bwvjz15af9-linux-6.1.43-modules-shrunk/
        `-- [       4096]  26947584-26951680.unknown {{1}}

13 directories, 12 files

That looks better. It seems to be handling the first archive correctly!
But then there is still the/an error, and most of the files from the nested archive were not extracted.

Some further nitpickiness (largely unrelated to this overall issue):

1. I only see 3 extracted files. Do the unknown chunks count as files? I don't think they are "files" in that sense. (They result in regular files in the output, but semantically they are not files in the archive.)
2. Similarly, there are 14 dirs in the output tree (incl. top-level, 9 of which are within *.cpio_portable_ascii_extract dirs (i.e. were encoded in the input).
3. The CPIO (largely) was inside the ZSTD. I don't think it makes very much sense to express their relative size of a whole (which one?).
4. Good. But knowing at least which extraction was attempted and failed would be nice. I know to expect that there are things missing in the output, but not where.
5. It seems to me that without the -k option, unblob removes blobs that it processed successfully. Why is zstd.uncompressed still there? It was split into 0-26947584.cpio_portable_ascii and 26947584-26951680.unknown and should then be done, no?

Originally posted by @NiklasGollenstede in #640 (comment)