[Bug 1971430] Re: lz4 is not a dependency of initramfs-tools-core

[Benjamin Drung]

A patch for that will be welcome.

As of Ubuntu 24.10 (oracular), you can use 3cpio to list/extract
initrds. It will print following message when the needed binary is not
found:

```
$ 3cpio -t /boot/initrd.img > /dev/null
3cpio: Error: Failed to list content of '/boot/initrd.img': Program 'lz4' not found in PATH.
```

Would you consider that enough as well?

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https://bugs.launchpad.net/bugs/1971430

Title:
  lz4 is not a dependency of initramfs-tools-core

Status in initramfs-tools package in Ubuntu:
  Triaged

Bug description:
  lz4 is not a dependency of initramfs-tools-core, although it uses
  lz4cat in the unmkinitramfs script.

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