RemovePackages behavior doesn't match manpage

[craftyguy]

mkosi commit the issue has been seen with

main

Used host distribution

postmarketOS

Used target distribution

postmarketOS

Linux kernel version used

6.16

CPU architectures issue was seen on

None

Unexpected behaviour you saw

RemovePackages was changed in b3d6e69 to scrub the package list BEFORE anything is installed, this differs from what the manpage says:

`RemovePackages=`, `--remove-package=`
:   Takes a comma-separated list of package specifications for removal, in
    the same format as `Packages=`. The removal will be performed as one
    of the last steps. This step is skipped if `CleanPackageMetadata=no`
    is used.

It would be nice to have the old RemovePackages behavior back, it would allow installing tools used in mkosi.postinst and cleaning them up after automatically. Excluding packages, which I believe is what b3d6e69 is going for, could be done with somethign like Packages=!foo bar bazz (e.g. to exclude/remove foo from the final pkg list if it was added by something).

In any case, if you want to keep RemovePackages as it works now, the manpage should be updated :)

Used mkosi config

mkosi output

[craftyguy]

I first learned about RemovePackages in the manpage at this location where it talks about the mkosi steps:

        26. Remove packages and files (RemovePackages=, RemoveFiles=)

        27. Run SELinux relabel is a SELinux policy is installed

        28. Run finalize scripts (mkosi.finalize)

        29. Generate unified kernel image if configured to do so

        30. Generate final output format

        31. Run post‐output scripts (mkosi.postoutput)