Put .deb file in root of APT repo

[HebaruSan]

Problem

The repo from #3197 is closer to working after #3201, but still has some issues, including this when attempting to install ckan:

Fehl:3 http://ksp-ckan.s3-us-west-2.amazonaws.com/deb nightly/main all ckan all 1.29.1                                  
404  Not Found [IP: 52.218.240.57 80]                           
E: Fehlschlag beim Holen von http://ksp-ckan.s3-us-west-2.amazonaws.com/deb/./ckan_1.29.1_all.deb 404  Not Found [IP: 52.218.240.57 80]
---
Err:3 http://ksp-ckan.s3-us-west-2.amazonaws.com/deb nightly/main all ckan all 1.29.1                                  
404  Not Found [IP: 52.218.240.57 80]                           
E: Error while fetching http://ksp-ckan.s3-us-west-2.amazonaws.com/deb/./ckan_1.29.1_all.deb 404  Not Found [IP: 52.218.240.57 80]

Cause

The deb/dists/nightly/main/binary-all/Packages.gz file contains:

Filename: ./ckan_1.29.1_all.deb

... which I thought from the documentation would be interpreted relative to that file's location to produce deb/dists/nightly/main/binary-all/./ckan_1.29.1_all.deb, similar to how web relative URLs normally work. Rather it looks like that path is appended to the root path of the repo, which is not where our .deb file currently is.

Changes

Now we put the .deb file in /deb/. To make this work, the two S3 sync commands are now:

• Put _build/deb/apt-repo-root into /deb/, which will contain just the .deb file
• Put _build/deb/apt-repo-dist into /deb/dists/stable/ or /deb/dists/nightly/, which will contain everything else

The Makefile is adjusted to generate those folders accordingly.

Note, there are still other issues relating to signatures and architectures. Those will be addressed in future changes and are not attempted to be solved here.

[DasSkelett]

Ugh, APT can not handle a ./ in the path correctly :/

Err:1 http://ksp-ckan.s3-us-west-2.amazonaws.com/deb nightly/main all ckan all 1.29.1
404  Not Found [IP: 52.218.160.73 80]
E: Failed to fetch http://ksp-ckan.s3-us-west-2.amazonaws.com/deb/./ckan_1.29.1_all.deb  404  Not Found [IP: 52.218.160.73 80]

[HebaruSan]

🤦
Obviously it works fine in a browser (and presumably any other app or library that understands what a URL is).

[HebaruSan]

Got frustrated and attempted a fix w/o PR: abc1606

Any improvement?

[DasSkelett]

Had to fight some caching on APT's side (in /var/lib/apt/lists/), but afterwards it installed successfully 🎉