bug#69070: No releases/revisions in /snapshot endpoints?

[Ludovic Courtès]

Dear SWH,

In <https://issues.guix.gnu.org/69070> I stumbled upon what might be new
behavior from the /snapshot endpoint:

> The crux of the problem is that ‘snapshot-branches’ used to return
> either a “revision” or a “release”, but now it can also return a
> “directory”:
>
> $ wget -qO- 
> https://archive.softwareheritage.org/api/1/snapshot/c405490b80fb35cc58b34260d9ec6add8248857f
>  |jq
> {
>   "id": "c405490b80fb35cc58b34260d9ec6add8248857f",
>   "branches": {
>     "1.3.2": {
>       "target": "e4a4be18fae8d9c6528abff3bc9088feb19a76c7",
>       "target_type": "directory",
>       "target_url": 
> "https://archive.softwareheritage.org/api/1/directory/e4a4be18fae8d9c6528abff3bc9088feb19a76c7/";
>     },
>     "HEAD": {
>       "target": "1.3.2",
>       "target_type": "alias",
>       "target_url": 
> "https://archive.softwareheritage.org/api/1/directory/e4a4be18fae8d9c6528abff3bc9088feb19a76c7/";
>     }
>   },
>   "next_branch": null
> }

Current documentation mentions the ‘target_types’ query parameter, which
I could use to restrict results to “revision” and “release”:

  https://archive.softwareheritage.org/api/1/snapshot/doc/

However, that’d be the empty list of the case above.

Other snapshots seem to be missing releases and revisions as well, such
as this one:

  
https://archive.softwareheritage.org/api/1/snapshot/55bda9214f962550baad25026fb3ac3ad12e3eb9/

Did anything change here?  Am I holding it wrong?  :-)

Thanks in advance,
Ludo’.