Re: make dist using git archive

On Tue Jan 23, 2024 at 3:30 AM CST, Peter Eisentraut wrote:
> On 22.01.24 21:04, Tristan Partin wrote:
> > I am not really following why we can't use the builtin Meson dist 
> > command. The only difference from my testing is it doesn't use a 
> > --prefix argument.
>
> Here are some problems I have identified:
>
> 1. meson dist internally runs gzip without the -n option.  That makes 
> the tar.gz archive include a timestamp, which in turn makes it not 
> reproducible.
>
> 2. Because gzip includes a platform indicator in the archive, the 
> produced tar.gz archive is not reproducible across platforms.  (I don't 
> know if gzip has an option to avoid that.  git archive uses an internal 
> gzip implementation that handles this.)
>
> 3. Meson does not support tar.bz2 archives.
>
> 4. Meson uses git archive internally, but then unpacks and repacks the 
> archive, which loses the ability to use git get-tar-commit-id.
>
> 5. I have found that the tar archives created by meson and git archive 
> include the files in different orders.  I suspect that the Python 
> tarfile module introduces some either randomness or platform dependency.
>
> 6. meson dist is also slower because of the additional work.
>
> 7. meson dist produces .sha256sum files but we have called them .sha256. 
>   (This is obviously trivial, but it is something that would need to be 
> dealt with somehow nonetheless.)
>
> Most or all of these issues are fixable, either upstream in Meson or by 
> adjusting our own requirements.  But for now this route would have some 
> significant disadvantages.

Thanks Peter. I will bring these up with upstream!

-- 
Tristan Partin
Neon (https://neon.tech)